METHOD FOR RAPIDLY DETERMINING EFFECTIVE STERILIZATION , DEIMMUNIZATION, AND/OR DISINFECTION
20170283847 · 2017-10-05
Assignee
Inventors
Cpc classification
International classification
Abstract
A method for rapidly determining effective sterilization, deimmunization, and/or disinfection of equipment and/or supplies by a device. The method includes providing a defined surrogate protein having a predetermined sequence representative of an infectious agent potentially contaminating the equipment and/or the supplies to be sterilized, deimmunized, and/or disinfected by the device. The defined surrogate protein having the predetermined sequence is subjected to sterilization, deimmunization, or disinfection. The effectiveness of the sterilization deimmunization, or disinfection is rapidly determined by determining if the defined surrogate protein has been destroyed.
Claims
1. A method for rapidly determining effective sterilization, deimmunization, and/or disinfection of equipment and/or supplies by a device, the method comprising: providing a defined surrogate protein having a predetermined sequence representative of an infectious agent potentially contaminating the equipment and/or the supplies to be sterilized, deimmunized, and/or disinfected by the device; subjecting the defined surrogate protein having the predetermined sequence to sterilization, deimmunization, or disinfection; and rapidly determining the effectiveness of the sterilization, deimmunization, and/or disinfection by determining if the defined surrogate protein having the predetermined sequence has been destroyed.
2. The method of claim 1 in which the defined surrogate protein includes proteins critical for stability, growth and/or infectious capacity of infectious agents.
3. The method of claim 1 in which the defined surrogate protein includes a protein critical for stability, growth and/or infectious capacity of surrogate organisms of infectious agents.
4. The method of claim 2 in which the infectious agent includes one or more of: an infectious protein, an infectious spore forming bacteria, an infectious vegetative bacteria, an infections fungus, and an infectious virus.
5. The method of claim 1 in which the defined surrogate protein includes pathogenic proteins, proteins critical for the growth of infectious agents, and immunogenic proteins.
6. The method of claim 1 in which the predetermined sequence is defined by the sequence: TABLE-US-00042 (SEQ ID NO: 1) 10 20 30 40 50 MYNYTSAKYE VPIAIQDRSF NEDGSLNFPS EGDNPTIHPY WQPEFFGDTI MVNGRVWPNM NVDMTRYRFR LLNGSNARFY NLKFSNGMQF WQIGTDGGYL NKPVPLTSLL ISPGERADIL VDFTEIPAGT RIILNNDANA PYPTGDAPDK DTTGQIMQFT VQHNDHHHHH H
7. The method of claim 6 in which the defined surrogate protein is at least 95% homologous the predetermined sequence or substantial fragment of the predetermined sequence.
8. The method of claim 1 in which the predetermined sequence is defined by the sequence: TABLE-US-00043 (SEQ ID NO: 2) 10 20 30 40 50 MTLEKTYYEV TMEECTHQLH RDLPPTRLWG YNGLFPGPTI EVKRNENVYV KWMNNLPSTH FLPIDHTIHH SDSQHEEPEV KTVVHLHGGV TPDDSDGYPE AWFSKDFEQT GPYFKREVYH YPNQQRGAIL WYHDHAMALT RLNVYAGLVG AYIIHDPKEK RLKHHHHHH
9. The method of claim 8 in which the defined surrogate protein is at least 95% homologous the predetermined sequence or substantial fragment of the predetermined sequence.
10. The method of claim 1 in which the predetermined sequence is defined by the sequence: TABLE-US-00044 (SEQ ID NO: 3) 10 20 30 40 50 MTGMPEGEGV DSNLLGGDGG DIAYPYYLIN GRIPVAATSF KAKPGQRIRI RIINSAADTA FRIALAGHSM TVTHTDGYPV IPTEVDALLI GMAERYDVMV TAAGGVFPLV ALAEGKNALA RALLSTGAGS PPDHHHHHH
11. The method of claim 10 in which the defined surrogate protein is at least 95% homologous the predetermined sequence or substantial fragment of the predetermined sequence.
12. The method of claim 1 in which the predetermined sequence is defined by the sequence: TABLE-US-00045 (SEQ ID NO: 4) 10 20 30 40 50 MTGYKNYTLK AQKGKTEFYK NNFSNTLGYN GNLLGPTLKL KKGDKVKIKL INNLDENTTF HWHGLEVNGK VDGGPSQVIK PGKEKTIKFE VNQDSATLWY HPHPSPNTAK QVYNGLSGLL YIEDSKKNHH HHHH
13. The method of claim 12 in which the defined surrogate protein is at least 95% homologous the predetermined sequence or substantial fragment of the predetermined sequence.
14. The method of claim 1 in which the predetermined sequence is defined by the sequence: TABLE-US-00046 (SEQ ID NO: 5) 10 20 30 40 50 MTGFRHEKVL CLKTWHVDEQ GAFTPFSVPR QAAREGTRGR YSTINGKHVP TIDLPAGQIV RVRLLNVDNT VTYRLNPNGE ARIYAVDGHP VEPRGFEGQY WIGPGMRLEL ALKVPEAGTE LSLRDGPVRL ATIRSVAHHH HHH
15. The method of claim 14 in which the defined surrogate protein is at least 95% homologous the predetermined sequence or substantial fragment of the predetermined sequence.
16. The method of claim 1 in which the predetermined sequence is defined by the sequence: TABLE-US-00047 (SEQ ID NO: 6) 10 20 30 40 50 MTITLEWSVT TGYRRLDGVK KRVYLINGLF PGPTIEARSG DSLQVQVTNN IQDEGLVIHW HGLHMRGANH MDGVTGVTQC PIVPGDSMLY NFTISQSQSG TFWYHAHSAL QRAEGLYGGF VVHKPSTHHH HHH
17. The method of claim 16 in which the defined surrogate protein is at least 95% homologous the predetermined sequence or substantial fragment of the predetermined sequence.
18. The method of claim 1 in which the predetermined sequence is defined by the sequence: TABLE-US-00048 (SEQ ID NO: 7) 10 20 30 40 50 MTAETHTWYF KTSWVDANPD GVFPRKMIGF NDSWPLPTLR VKKGDTVNLY LINGFDDRNT SLHFHGLFQH GTNQMDGPEM VTQCPIPPGE TFLYNFTVDD QVGSYWYHSH TSGQYGDGMR GVFIIEDHHH HHH
19. The method of claim 18 in which the defined surrogate protein is at least 95% homologous the predetermined sequence or substantial fragment of the predetermined sequence.
20. The method of claim 1 in which the predetermined sequence is defined by the sequence: TABLE-US-00049 (SEQ ID NO: 8) 10 20 30 40 50 MKTVRVPVPQ PQPQNPSQPQ PQRQVPLVQQ QQFPGQQQQF PPQQPYPQPQ PFPSQQPYLQ LQPFPQPQPF PPQLPYHHHH HH
21. The method of claim 20 in which the defined surrogate protein is at least 95% homologous the predetermined sequence or substantial fragment of the predetermined sequence.
22. The method of claim 1 in which the rapidly determining including a sensitive protein analysis procedure.
23. The method of claim 22 in which the sensitive protein analysis procedure includes one or more of: a Western Blot analysis, a protein assay analysis, a magnetic separation analysis, a peptide analysis, a mass spectrometry analysis, and a gas chromatography analysis.
24. The method of claim 22 in which the sensitive protein analysis procedure includes fluorescence analysis of proteins covalently crosslinked on a solid surface.
24. The method of claim 22 in which the sensitive protein analysis procedure includes fluorescence analysis of proteins covalently crosslinked on magnetic beads.
25. The method of claim 1 in which the defined surrogate protein having the predetermined sequence is disposed on a surface.
26. The method of claim 1 in which the defined surrogate protein having the predetermined sequence is disposed on a test strip.
27. The method of claim 1 in which the defined surrogate protein having the predetermined sequence is disposed in or on a vessel.
29. The method of claim 1 in which the surrogate protein having the predetermined sequence is disposed on a tube.
30. The method of claim 30 in which the surrogate protein having the predetermined sequence is disposed on a holder.
31. The method of claim 1 in which the holder is disposed to receive a flow of a sterilization agent, a deimmunization agent or a disinfection agent.
Description
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0033] Other objects, features and advantages will occur to those skilled in the art from the following description of a preferred embodiment and the accompanying drawings, in which:
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DETAILED DESCRIPTION OF THE INVENTION
[0056] Aside from the preferred embodiment or embodiments disclosed below, this invention is capable of other embodiments and of being practiced or being carried out in various ways. Thus, it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of components set forth in the following description or illustrated in the drawings. If only one embodiment is described herein, the claims hereof are not to be limited to that embodiment. Moreover, the claims hereof are not to be read restrictively unless there is clear and convincing evidence manifesting a certain exclusion, restriction, or disclaimer.
[0057] The method for rapidly determining effective sterilization, deimmunization, and/or disinfection of equipment or supplies of one or more embodiments of this invention may be utilized to qualify sterilization, deimmunization, and/or disinfection by a device, e.g., a sterilization device, a deimmunization device, or a disinfection device and provide improvements to the conventional methods discussed above. In one example, the method for rapidly detecting effective sterilization, deimmunization, and/or disinfection of equipment or supplies of one or more embodiments of this invention may be based on a specific measuring the complete destruction of a specific protein critical for an organism's growth and requires only a few hours to return absolute results. The method for rapidly detecting effective sterilization, deimmunization, and/or disinfection of equipment or supplies of one or more embodiments of this invention also contains multiple layers of internal controls that enable a clear determination if either false positive and false negative results have occurred. This allows the avoidance of unnecessary repairs to sterilization, deimmunization, or disinfection equipment and eliminates false negative tests and more dangerous exposure of patients to improperly sterilized, deimmunized, or disinfected medical equipment or supplies.
[0058] The method for rapidly detecting effective sterilization, deimmunization, and/or disinfection of equipment or supplies of one or more embodiments of this invention may be used to rapidly determine if a sterilization, deimmunization, and/or disinfection device is effectively destroying specific infectious or immunogenic agents, defined herein as infectious or pathogenic proteins, infectious spore forming bacteria, infectious vegetative bacteria, infectious fungus, infectious viruses, and immunogenic proteins.
[0059] In one embodiment, the method for rapidly determining effective sterilization, deimmunization and/or disinfection of equipment and/or supplies by a device, such as a sterilization device, e.g., by a device that applies cycles of a solvent and electromagnetic radiation, e.g., microwaves, such as disclosed in U.S. application Ser. No. 15/330,469 by the assignee hereof, hereinafter the '469 patent application, any of the sterilization devices discussed in the Background section above, the devices for the methods of sterilization shown in Table 3 above, an autoclave, of similar type sterilization device known to those skilled in the art, a deimmunization device, e.g., a device that applies cycles of a solvent and electromagnetic radiation, e.g., microwaves, such as disclosed in the '469 patent application and/or disinfection device, e.g., a device that applies cycles of a solvent and electromagnetic radiation, e.g., microwaves, such as disclosed in the '469 patent application, or the devices for the methods of disinfection shown in Table 3 above, includes providing a defined surrogate protein having a predetermined sequence representative of an infectious agent potentially contaminating the equipment and/or supplies to be sterilized, deimmunized and/or disinfected by the device, step 100,
[0060] The method preferably directly measures the irreversible destruction of the defined surrogate proteins having the predetermined sequence that are critical for survival and/or growth of such infectious agents.
[0061] In one embodiment, the method utilizes one or more prion detection indicator samples configured as a defined surrogate protein. In this example, the defined surrogate protein has the following predetermined sequence:
TABLE-US-00013 (SEQ ID No: 9) KKRPKPGGWN TGGSRYPGQG SPGGNRYPPQ GGTWGQPHGG GWGQPHGGSW 50 GQPHGGSWGQ PHGGGWGQGG GTHNQWNKPS KPKTNLKHVA GAAAAGAVVG 100 GLGGYMLGSA MSRPMIHFGN DWEDRYYREN MYRYPNQVYY RPVDQYSNQN 150 NFVHDCVNIT IKQHTVTTTT KGENFTETDV KMMERVVEQM CVTQYQKESQ 200 AYYDGRRS 208
[0062] The defined prion surrogate protein having the predetermined sequence above for prion detection is then subjected to sterilization, deimmunization, or disinfection, by a device, e.g., a sterilization device, a deimmunization device or a disinfection device, e.g., by conventional methods discussed in the Background section above, or by applying cycles of a solvent and electromagnetic radiation, e.g., microwaves, such as disclosed in the '469 patent application.
[0063] In this example, to rapidly determine the effectiveness of sterilization, deimmunization, or disinfection of equipment or supplies by the device, a determination is made if the defined surrogate protein has been destroyed using a sensitive protein analysis procedure, such as Western Blot analysis, or similar protein analysis techniques, such as fluorescence analysis of proteins covalently crosslinked to solid surfaces used in protein array analysis which are extremely sensitive processes that measure both the amount of full length intact defined surrogate protein having a predetermined sequence and the amount of the destroyed or degraded defined surrogate protein, protein array analysis, magnetic separation analysis, peptide analysis, mass spectrometry analysis, gas chromatography analysis, or similar type analysis. In one example, the defined surrogate protein includes a protein critical for stability, growth, and/or infectious capacity of an infectious agent. The defined surrogate protein may include a protein critical for stability, growth, and/or infectious capacity of a surrogate organism of the infectious agent.
[0064] One embodiment of the method for rapidly detecting effective sterilization, deimmunization, and/or disinfection of this invention includes providing the defined surrogate protein having a predetermined sequence that is based on the development of a synthetic recombinant test protein sequence with high homology to a section of a protein encoded by the suf I loci in the targeted pathogenic genus, e.g., one or more or all of the genus shown in Table 2 above, and the development of a monoclonal or polyclonal antibody that is able to detect the defined surrogate recombinant protein using Western Blot or other similar protein analysis techniques discussed above. In genera that form spores, such as Bacillus and Clostridium, the target protein encoded in the suf I loci or defined surrogate protein having the predetermined sequence of the tests forms the spore coat protein CotA. In non-spore forming genus such as the bacteria Mycobacterium, Staphylococcus and Pseudomonas, or the fungus Candida, the target protein encoded in the suf I loci or defied surrogate protein of the tests forms the cell division protein (FtsP). In other genera of bacteria and fungus, the target protein or encoded defined surrogate protein having the predetermined sequence in the suf I loci may have additional names but all carry the same protein structure of multicopper oxidase with 3 cupredoxin superfamily domains.
[0065] For each method of rapidly determining effective sterilization, deimmunization, or disinfection, specific for its unique genus, a predetermined quantity of the defined surrogate having the predetermined protein sequence is placed on a carrier, such as filter paper, or a tube, or on the surface of an object, such as a glass or slide, a microtiter plate, a flexible membrane, magnetic beads, e.g., magnetic beads used for magnetic bead separation or similar type object or surface. For Western analysis, the defined surrogate protein having the predetermined sequence is not covalently linked to the carrier or surface. In other protein analysis processes such as protein array or magnetic bead separation, the defined surrogate protein having the predetermined sequence is covalently linked to the carrier or solid surface. After treatment with the sterilization, deimmunization or disinfection equipment of process and Western analysis, this involves recovering the recombinant defined surrogate protein having the predetermined sequence, both in its intact and fragmented forms, from the carrier, surface tube, or object, treating the sample with denaturing loading buffer and running the sample on an acrylamide gel. A control sample that was not subjected to sterilization, deimmunization, or disinfection is also included. In one example, the samples are transferred nylon membrane and the intact and fragmented samples are visualized using the specific antibody. If the sterilization, deimmunizing or disinfection equipment is operating correctly, the control sample will have protein indicator bands that are easily visualized but the treated sample will be absent any type protein indicator bands indicating the sterilization, deimmunizing or disinfection equipment was able to irreversibly fragment the recombinant defined surrogate protein. If other protein analysis processes such as protein array or magnetic bead separation are used, the solid surface to which defined surrogate protein having the predetermined sequence was covalently linked will be tested such that intact defined surrogate protein having the predetermined sequence can be visualized using the specific antibody and fragment and/or destroyed defined surrogate protein having the predetermined sequence is no longer detected by the process. As the amino acid sequence and structure of the defined surrogate protein having a predetermined sequence is highly homologous to the target protein in the pathogenic members of the genus, irreversible destruction of the defined surrogate protein indicates that the sterilization, deimmunizing or disinfection equipment will have also destroyed the target proteins, resulting in destruction of all members of the genus that may be on the sterilization, deimmunizing or disinfection equipment or supplies.
[0066] In accordance with one or more embodiments of the method for rapidly determining effective sterilization, deimmunization, and/or disinfection, the predetermined sequence of the defined surrogate protein and the corresponding peptide used for development of a polyclonal antibody for Western Blot analysis include one or more of the following predetermined sequences:
For Clostridium:
[0067]
TABLE-US-00014 (SEQ ID NO: 1) 10 20 30 40 50 MYNYTSAKYE VPIAIQDRSF NEDGSLNFPS EGDNPTIHPY WQPEFFGDTI MVNGRVWPNM NVDMTRYRFR LLNGSNARFY NLKFSNGMQF WQIGTDGGYL NKPVPLTSLL ISPGERADIL VDFTEIPAGT RIILNNDANA PYPTGDAPDK DTTGQIMQFT VQHNDHHHHH H
[0068] The peptides used for the development of polyclonal and monoclonal antibodies for use by Western Blot analysis for the above sequence are:
TABLE-US-00015 (SEQ ID NO: 10) KYEVPIAIQDRSFNEDGSLNFPSE and (SEQ ID NO: 11) YLNKPVPLTSLLISPGERADILVD
For Bacillus:
[0069]
TABLE-US-00016 (SEQ ID NO: 2) 10 20 30 40 50 MTLEKTYYEV TMEECTHQLH RDLPPTRLWG YNGLFPGPTI EVKRNENVYV KWMNNLPSTH FLPIDHTIHH SDSQHEEPEV KTVVHLHGGV TPDDSDGYPE ANFSKDFEQT GPYFKREVYH YPNQQRGAIL WYHDHAMALT RLNVYAGLVG AYIIHDPKEK RLKHHHHHH
[0070] The peptides used for the development of polyclonal mid monoclonal antibodies for use by Western Blot analysis for the above sequence are:
TABLE-US-00017 (SEQ ID NO: 12) QRGAILWYHDHAMALTRLNVYAGL and (SEQ ID NO: 13) QLHRDLPPTRLWGYNGLFPGPTIE
For Mycobacterium:
[0071]
TABLE-US-00018 (SEQ ID NO: 3) 10 20 30 40 50 MTGMPEGEGV DSNLLGGDGG DIAYPYYLIN GRIPVAATSF KAKPGQRIRI RIINSAADTA FRIALAGHSM TVTHTDGYPV IPTEVDALLI GMAERYDVMV TAAGGVFPLV ALAEGKNALA RALLSTGAGS PPDHHHHHH
[0072] The peptides used for the development of polyclonal and monoclonal antibodies for use by Western Blot analysis for the above sequence are:
TABLE-US-00019 (SEQ ID NO: 14) DTAFRIALAGHSMTVTHTDGYPVIPTEVD and (SEQ ID NO: 15) VFPLVALAEGKNALARALLSTGAGS
For Staphylococcus:
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TABLE-US-00020 (SEQ ID NO: 4) 10 20 30 40 50 MTGYKNYTLK AQKGKTEFYK NNFSNTLGYN GNLLGPTLKL KKGDKVKIKL INNLDENTTF HWHGLEVNGK VDGGPSQVIK PGKEKTIKFE VNQDSATLWY HPHPSPNTAK QVYNGLSGLL YIEDSKKNHH HHHH
[0074] The peptides used for the development of polyclonal and monoclonal antibodies for use by Western Blot analysis for the above sequence are:
TABLE-US-00021 (SEQ ID NO: 16) NFSNTLGYNGNLLGPTLKLKKGDKVKIKL and (SEQ ID NO: 17) KFEVNQDSATLWYHPHPSPNTAK
For Pseudomonas:
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TABLE-US-00022 (SEQ ID NO: 5) 10 20 30 40 50 MTGFRHEKVL CLKTWHVDEQ GAFTPFSVPR QAAREGTRGR YSTINGKHVP TIDLPAGQIV RVRLLNVDNT VTYRLNPNGE ARIYAVDGHP VEPRGFEGQY WIGPGMRLEL ALKVPEAGTE LSLRDGPVRL ATIRSVAHHH HHH
[0076] The peptides used for the development of polyclonal and monoclonal antibodies for use by Western Blot analysis for the above sequence are:
TABLE-US-00023 (SEQ ID NO: 18) DLPAGQIVRVRLLNVDNTVTYRLN and (SEQ ID NO: 19) QYWIGPGMRLELALKVPEAG
For Trichophyton:
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TABLE-US-00024 (SEQ ID NO: 6) 10 20 30 40 50 MTITLEWSVT TGYRRLDGVK KRVYLINGLF PGPTIEARSG DSLQVQVTNN IQDEGLVIHW HGLHMRGANH MDGVTGVTQC PIVPGDSMLY NFTISQSQSG TFWYHAHSAL QRAEGLYGGF VVHKPSTHHH HHH
[0078] The peptides used for the development of polyclonal and monoclonal antibodies for use by Western Blot analysis for the above sequence are:
TABLE-US-00025 (SEQ ID NO: 20) YRRLDGVKKRVYLINGLFPGPTIE and (SEQ ID NO: 21) TQCPIVPGDSMLYNFTISQSQSG
For Candida:
[0079]
TABLE-US-00026 (SEQ ID NO: 7) 10 20 30 40 50 MTAETHTWYF KTSWVDANPD GVFPRKMIGF NDSWPLPTLR VKKGDTVNLY LINGFDDRNT SLHFHGLFQH GTNQMDGPEM VTQCPIPPGE TFLYNFTVDD QVGSYWYHSH TSGQYGDGMR GVFIIEDHHH HHH
[0080] The peptides used for the development of polyclonal and monoclonal antibodies for use by Western Blot analysis for the above sequence are:
TABLE-US-00027 (SEQ ID NO: 22) GFNDSWPLPTLRVKKGDTVNLYL and (SEQ ID NO: 23) WYFKTSWVDANPDGVFPRKMIG
For α-Gliadin:
[0081]
TABLE-US-00028 (SEQ ID NO: 8) 10 20 30 40 50 MKTVRVPVPQ PQPQNPSQPQ PQRQVPLVQQ QQFPGQQQQF PPQQPYPQPQ PFPSQQPYLQ LQPFPQPQPF PPQLPYHHHH HH
[0082] The peptide used for the development of monoclonal or polyclonal antibody used by Western Blot analysis for the above sequence is:
TABLE-US-00029 (SEQ ID NO: 24) FPPQQPYPQPQPFPSQQPYLQLQPFPQPQ
[0083] Western Blot analysis typically utilizes equipment, e.g., acrylamide gel, a power supply to create an electric field to trigger protein migration where smaller fragments move faster than larger fragments to separate intact proteins from fragmented or degraded proteins, a membrane, transfer equipment, and visualization equipment. Western Blot analysis also preferably utilizes specific reagents, e.g., a positive control protein to show the location of a full length defined surrogate protein and specific antibody for the defined surrogate protein, e.g., any of the defined surrogate proteins having the associated predetermined sequences and the corresponding antibody above. The specific antibody binds to the associated defined surrogate protein, both full length, and fragments, to provide a visualization if the defined surrogate protein was destroyed by sterilization, deimmunization, or disinfection.
[0084] Western Blot analysis for infectious organisms may also typically include a defined number of colony forming units (CFU) or spores of the test pathogen which are added to a stable substrate such as filter paper (dried) or other sample holder. The number of CFU or spores will contain a defined quantity of each indication protein to be followed.
[0085] Western Blot analysis may also be conducted on defined surrogate proteins having the associated predetermined sequences samples placed on indicator strips or other small sample holders that maybe subjected to sterilization, deimmunization or disinfection. After sterilization, deimmunization or disinfection, the defined surrogate proteins from the indicator strips or other small sample holders are extracted from the filter paper or other sample holders into a loading dye and denatured (eliminating any tertiary protein structure). The samples are then run on the gel, including control wells with (1) size marker, (2) positive control protein, (3) other controls if needed. After transfer to membrane, defined surrogate proteins and protein fragments are visualized with unique antibodies preferably having a high affinity and specific binding to an indicator region of the protein being tested. Successful sterilization, deimmunization or disinfection will result in the loss of all indicator proteins of defined length. The development process may require side by side Western Blots and standard growth studies to demonstrate sufficient equivalence.
[0086] Western Blot analysis may also require defining the defined surrogate proteins having the associated predetermined sequence, positive control proteins, and/or a negative control proteins and may require the development of a polyclonal or monoclonal antibodies that specifically bind to specific defined surrogate proteins discussed above in Western Blot analysis or other protein analysis format, both full-length and fragments, and the positive control protein. The antibody will not bind to the negative control protein. It is also possible that a secondary antibody that is labeled with an enzyme or other visualization marker will be needed to visualize the detection antibody.
[0087] Protein array analysis can be used as a substitution for Western blot analysis in circumstances in which less sensitivity can be tolerated, but faster results are needed. In a Western Blot analysis, a substrate such as a piece of filter paper ortube is used to temporarily hold the recombinant protein sample during testing of sterilization equipment. After sterilization, deimmunization and/or disinfection, the recombinant protein sample is removed from the substrate, denatured, separated on an acrylamide gel and transferred to nylon membrane before visualizing with antibodies. In protein array analysis, the recombinant protein sample, e.g., one or more of the defined surrogate proteins having the associated predetermined sequence discussed above, is covalently crosslinked to solid surfaces such as glass, plastics or metal beads. After treatment by sterilization, deimmunization or disinfection, the solid surfaces, with the covalently crosslinked recombinant proteins are directly visualized with antibodies. Unlike Western blot analysis that can visualize the amount of protein fragmentation has occurred, protein array analysis can indicate how much of the protein sample has lost regions that are recognized by visualizing antibodies protein assay analysis but is unable to determine what other areas of the recombinant proteins were not destroyed. Thus, protein array analysis is highly suitable for testing the presence or absence of intact test proteins, such as the defined surrogate proteins having the associated predetermined sequence homologous to proteins critical for spore coats or bacteria or fungus survival or growth, e.g., one or more of the defined surrogate proteins having the predetermined sequences for Clostridium, Bacillus, Mycobacterium, Staphylococcus, Pseudomonas, Trichophyton, Candida, and α-Gliadin shown above. Because protein assay analysis cannot determine the absolute level of protein fragmentation that has occurred, protein array analysis may not be sensitive enough for quantifying the complete destruction of infectious proteins like prions although it is not excluded as a test method if less sensitivity is tolerated.
[0088] To establish a protein array analysis, defined quantities of the defined surrogate proteins for Clostridium, Bacillus, Mycobacterium, Staphylococcus, Pseudomonas, Trichophyton, Candida, and α-Gliadin above are covalently linked to a solid surface. The solid surface may include a wide support surface, such as a microscope slide made of glass or silicon, a flexible membrane, a magnetizable bead, a microtiter plate, or other similar solid surface to which a selection of the defined surrogate proteins having the associated predetermined sequence can be permanently attached. The surface used is determined by the type detector that will be used to determine the quantity of protein left on the support after sterilization, deimmunization or disinfection. After sterilization, deimmunization or disinfection, the solid surface is visualized with antibodies or other specific ligands that will specifically bind to the intact defined surrogate protein but not to destroyed defined surrogate proteins. The antibodies or other ligands can contain fluorescent dyes or other detection enabling attachments. Control slides that were not subjected to sterilization, deimmunization and/or disinfection are included as a positive control to enable estimations for the relative amount of test protein destroyed by sterilization, deimmunization and/or disinfection.
[0089] One key benefit of using protein array analysis in accordance with one embodiment of the method for rapidly determining effective sterilization, deimmunization, and/or disinfection of this invention is the covalently linked surrogate proteins on the surface of an object can be used for testing sterilization, deimmunization or disinfection by a sterilization, deimmunization or disinfection device that may use radiation or heat, as well as devices that use flowing disinfectants or gases to sterilize, deimmunize or disinfect medical equipment or supplies. In one example, holder 150,
[0090] If magnetizable beads are used as the solid surface, one or more of the defined surrogate proteins having the associated predetermined sequence could also be mixed into liquid sterilization, deimmunization and/or disinfection steam and later harvested with a strong magnet. Flowing disinfectants or gases would result in the complete loss of the defined surrogate protein having the associated predetermined sequence samples that are not covalently linked to a support surface and the protein array analysis may be used to rapidly determine effective sterilization, deimmunization or disinfection.
[0091] Both Western Blot Analysis and protein array analysis are an indirect measurement of sterilization, deimmunization and/or disinfection. Sterilization is the complete destruction of spore forming infectious organisms so the standard direct measurements are long growth studies to determine the number of organisms that survived the sterilization process. Deimmunization is the complete destruction of immunogenic proteins such that no protein fragments capable of triggering an immune reaction in human or animal remain. Disinfection is the complete destruction of vegetative bacteria, fungus and/or viruses. As disclosed herein, the defined surrogate proteins are considered to be in the form of isolated fragments and destroyed if proteins critical for the survival of the infectious agents are used in quantities 10,000 to 1,000,000 times as much as would occur in a standard sample of intact infectious agents. To correctly establish the scale to determine success ratio between the direct and indirect tests, multiple conditions are preferably utilized to determine the Western Blot analysis and protein array analysis conditions that perfectly align with standard sterilization, deimmunization and/or disinfection studies using intact infectious organisms and post sterilization growth conditions.
[0092] The samples prepared for Western Blot analysis and protein array analysis may use a wide range of circumstances. If the sterilization, deimmunization and/or disinfection equipment uses flowing gases or liquid to wash over the surfaces to be sterilized holder 150,
[0093] The following examples are exemplary and explanatory only and do not limit or restrict this invention.
EXAMPLES
Example 1: Comparing Amino Acid Sequence of Human PrP Protein to Other Species
[0094] It is important to qualify the ability of a sterilization device to destroy prions that may be contaminating medical equipment. For the specific test described herein in accordance with one or more embodiments of the method for rapidly determining effective sterilization, deimmunization, or disinfection of this invention, a defined quantity of the defined surrogate prion protein discussed above is provided and then evaluated using Western Blot analysis and an antibody specific for the defined prion surrogate protein.
[0095] To protect the human operators of the test, infectious human prions cannot be used. Instead, the defined surrogate protein is used that incorporates all the characteristics of human prion (PrP) proteins, with the critical exception that it cannot infect humans. In this example, to select the defined surrogate PrP protein to be used, a protein analysis was conducted comparing the amino acid protein sequence of human PrP protein against a selection of the protein sequence databases of other species including a primate, two companion animals, two food animals and two research animals. From this analysis, the mouse PrP protein was determined to be the best candidate surrogate protein. Structurally, mouse PrP protein is as robust as the human PrP protein and thus will be equivalently resistant to a wide range of destructive methods but is also sufficiently different as to be unable to infect humans. Arrow 168,
[0096] To evaluate additional surrogate PrP proteins that could be used, the mouse PrP protein sequence was compared against the protein sequence database. Table 5 below shows the wide diversity of a predetermined list of species PrP proteins that could be used as well as each protein's sequence ID and its homology to Mouse PrP. The human sequence is less than 90% homologous to mouse PrP. The search also demonstrates how conserved the PrP protein is across a wide range of mammalian species contained within the sequence database and any one of these could be used as the surrogate protein in the Protein Indicator Test. The database also contains the sequence for chicken PrP but as it is less than 50% homologous to other mammalian PrP proteins, it is possible that it or other related proteins could be used in the Protein Indicator Test but its divergence could impact its resistance to destruction. This would make it a less suitable surrogate for the test than other proteins, especially any mammalian PrP protein.
TABLE-US-00030 TABLE 5 Potential PrP Protein that could be used as Surrogate Protein in Sterilization Indication Tests. Information about each PrP protein includes species, Sequence ID number and homology to Mouse recombinant PrP protein. Homology to Species Sequence ID Number Mouse (%) Mouse (Mus musculus) sp|P04925.2|PRIO_MOUSE 100 Rat (Rattus norvegicus) sp|P13852.2|PRIO_RAT 98 Cotton Rat (Sigmodon hispidus) sp|Q9Z0T3.1|PRIO_SIGHI 97 Chinese Hamster (Cricetulus griseus) sp|Q60506.1|PRIO_CRIGR 97 Grey Dwarf Hamster (Cricetulus migratorius sp|Q60468.1|PRIO_CRIMI 95 Golden Hamster (Mesocricetus auratus) sp|P04273.1|PRIO_MESAU 95 Greater Kudu (Tragelaphus strepsiceros) sp|P40243.1|PRIO2_TRAST 90 Red-bellied Titi (Callicebus moloch) sp|P40248.1|PRIO_CALMO 96 Three-striped Night Monkey (Aotus trivirgatus) sp|P40245.1|PRIO_AOTTR 94 Black-capped capuchin (Sapajus apella) sp|P40249.1|PRIO_CEBAP 95 Common Marmoset (Callithrix jacchus) sp|P40247.1|PRIO_CALJA 95 Red-faced Spider Monkey (Ateles paniscus) sp|P51446.1|PRIO_ATEPA 94 Geoffrey's Spider Monkey (Ateles geoffroyi) sp|P40246.1|PRIO_ATEGE 91 Nilgai (Boselaphus tragocamelus) sp|Q5UJG7.1|PRIO_BOSTR 86 Alpine Musk Deer (Moschus chrysogaster) sp|Q68G95.1|PRIO_MOSCH 88 Common Squirrel Monkey (Saimiri sciureus) sp|P40258.1|PRIO_SAISC 91 Gelada Baboon (Theropithecus gelada) sp|Q95270.1|PRIO_THEGE 90 Black Crested Mangabey(Lophocebus aterrimus) sp|P67990.1|PRIO_LOPAT 90 Mona Monkey(Cercopithecus mona) sp|P61761.1|PRIO_CERMO 91 Patas Monkey(Erythrocebus patas) sp|Q95174.1|PRIO_ERYPA 91 Grivet(Chlorocebus aethiops) sp|P67988.1|PRIO_CHLAE 90 Mantled Guereza(Colobus guereza) sp|P40251.1|PRIO_COLGU 91 Bornean orangutan(Pongo pygmaeus) sp|P40256.1|PRIO_PONPY 91 François' Langur (Trachypithecus francoisi) sp|P40257.2|PRIO_TRAFR 91 Sooty Mangabey (Cercocebus atys) sp|Q95176.1|PRIO_CERAT 91 Crab-eating Macaque (Macaca fascicularis) sp|P67992.1|PRIO_MACFA 91 Mandrill(Mandrillus sphinx) sp|P40255.1|PRIO_MANSP 91 Gorilla (Gorilla gorilla gorilla) sp|P40252.1|PRIO_GORGO 90 Cat (Felis catus) sp|O18754.3|PRIO_FELCA 87 Human (Homo sapiens) sp|P04156.1|PRIO_HUMAN 89 Lar Gibbon(Hylobates lar) sp|P61766.1|PRIO_HYLLA 89 Bighorn Sheep (Ovis canadensis) sp|Q7JIH3.1|PRIO_OVICA 88 Goat(Capra hircus) sp|P52113.1|PRIO_CAPHI 88 Blackbuck(Antilope cervicapra) sp|Q5UJG1.1|PRIO_ANTCE 85 Takin(Budorcas taxicolor) sp|Q95M08.1|PRIO_BUDTA 87 Sheep (Ovis aries) sp|P23907.1|PRIO_SHEEP 87 Rabbit (Oryctolagus cuniculus) sp|Q95211.1|PRIO_RABIT 90 Water Buffalo (Bubalus bubalis) sp|Q5UJH8.1|PRIO_BUBBU 84 Rocky Mountain Elk sp|P67986.1|PRIO_CEREN 87 (Cervus canadensis nelsoni) Mule Deer (Odocoileus hemionus) sp|P47852.1|PRIO_ODOHE 87 Lesser Kudu (Tragelaphus imberbis) sp|Q5UJG3.1|PRIO_TRAIM 85 Greater Kudu(Tragelaphus strepsiceros) sp|P40242.1|PPIO1_TRAST 84 Cow (Bos taurus) sp|P10279.2|PRIO_BOVIN 84 Common Brushtail Possum sp|P51780.1|PRIO_TRIVU 77 (Trichosurus Vulpecula) Giant Panda(Ailuropoda melanoleuca) sp|Q6EH52.1|PRIO_AILME 84 American Mink (Neovison vison) sp|P40244.1|PRIO_NEOVI 79 Dromedary Camel (Camelus dromedaries) sp|P79141.1|PRIO_CAMDR 88 Pig (Sus scrofa) sp|P49927.1|PRIO_PIG 79 Ferret(Mustela putorius furo) sp|P52114.1|PRIO_MUSPF 78 Artic Fox(Vulpes lagopus) sp|B0FYL5.1|PRIO_VULLA 78 Dog (Canis lupus familiaris) sp|O46501.1|PRIO_CANFA 85 Chicken (Gallus gallus) sp|P27177.2|PRIO_CHICK 43
Example 2: Developing Method for Testing the Ability to Destroy PrP Proteins
[0097] One purpose of developing the defined prion surrogate protein test is to provide a rapid method for determining effective sterilization equipment. The method preferably has multiple steps including at least: 1) preparing defined prion surrogate proteins having a predetermined sequence, 2) subjecting the prion surrogate protein samples to sterilization, and 3) using Western Blot analysis to visualize the effects of sterilization of defined prion surrogate protein samples. Successful sterilization has occurred when all of the defined prion surrogate protein sample was fragmented and, as a result of the protein fragmentation, none remains to bind to the visualization antibodies. If sterilization was not successful, protein bands will be see on the Western Blot analysis.
[0098] A defined surrogate protein having a sequence above for the prions, recombinant mouse PrP full-length protein (208 amino acids long) was obtained from Abcam, Cambridge Mass. On a Western gel, the recombinant protein runs at about approximated 28 kDa in size, indicated at 290,
[0099] The Western Blot analysis discussed above is well-established and is an extremely sensitive method to determine the presence and/or absence of a specific protein. The first step in Western Blot analysis involves preparing the defined prion surrogate protein samples for separation by size. In accordance with one embodiment of the method for rapidly determining effective sterilization, deimmunization, or disinfection of the defined prion surrogate proteins will be run as single denatured proteins and thus must be denatured through the use of a denaturing loading buffer, boiled for 10 minutes and then run on a denaturing gel. Once loaded on to an appropriate acrylamide gel, the samples are subjected to electric current that results in the protein fragments traveling at different rates depending on size with smaller fragments moving faster than larger ones. In one example, the gel contained 8% acrylamide. To be able to monitor the separation of the defined prion surrogate protein samples, a standard sample with a mix of proteins of defined sizes was also included. For some experiments discussed herein, additional protein samples may be included to provide for controls of the sample handling conditions:
[0100] After separation, the defined prion surrogate protein samples are transferred to a special nylon membrane before being permanently cross-linked to the membrane. The final steps include incubating the nylon membrane with a primary antibody available from Abeam, Cambridge Mass. that specifically binds to the defined surrogate protein of interest. In the experiments discussed herein, the primary anti-PrP antibody was a rabbit monoclonal antibody that was raised against a synthetic peptide corresponding to residues near the C-terminus of human Prion protein PrP, as indicated by underlined region indicated at 170,
[0101] The first tests involved carefully drying defined quantities of recombinant mouse PrP protein onto filter papers to assist in storage, transport to and from location of sterilization equipment and handling during sterilization tests. To create, test strips of filter paper were cut 4 mm wide by 20 mm long and the bottoms were squared. Serial dilutions (1:3) of mouse PrP protein were created to contain protein solutions 0.1 μg/μl to 0.0037 μg/μl. The protein preps were added dropwise to the filter paper strips until 10 ul were added. The filter paper strips were then air dried. Filter paper strips were prepared in duplicate with 1 μg, 0.333 μg, 0.111 μg, or 0.033 μg applied respectively to a pair of strips. When dry, the strips were placed in Eppendorf tubes and 50 ul 1× Loading Buffer where BME was added. The strips and loading buffer were incubated at 95° C. for 5 minutes then given a quick spin in a micro centrifuge. For one of each paired sample, the filter paper strip was taken out of the Eppendorf tube and inserted into the well of the SDS-PAGE gel. For these samples, electroporation was used to extract any residual defined prion surrogate protein that was retained on the filter paper after extraction by boiling and centrifugation. Half of the loading buffer from these tubes was also loaded into the same well. For the other samples of the pair only boiling and centrifugation was used to extract the defined prion surrogate protein from the filter strips. From these, half of the loading buffer was added to the wells without also adding the filter paper. A control sample of 0.5 μg protein (equivalent to half of the 1 μg concentration samples) was also loaded on the gel for comparison. The gel was run and the Western Blot Analysis performed using the procedure described above.
[0102] The results demonstrated that there was no significant difference between the protein concentrations that were dried onto the filter paper and the control sample. There was also no significant difference between the extraction process using only boiling and centrifugation and the more difficult process of using boiling, centrifugation and electroporation for extraction. In addition, the Western Blot analysis demonstrated that the Western Blot analysis was sensitive to below 0.05 μg. Hence, a 1 μg of recombinant mouse PrP protein should be used for all sterilization tests. The samples should be extracted from filter paper using boiling in loading the buffer with BME and centrifugation and half of the sterilized samples used for Western Bolt analysis.
Example 3: Evaluation of Destruction of Prion Proteins Using Sterilization Equipment
[0103] Experiments were conducted to demonstrate a combination of one or more of heat, a vaporizing solvent, and electromagnetic radiation, e.g., microwaves, e.g., as disclosed in the '469 patent application, could irreversibly destroy the defined prion surrogate protein shown with the sequence shown above. The stable PrP protein was selected for the experiments as it cannot be irreversibly destroyed using a standard sterilization autoclave device. For the experiments, samples were created that each contained 1 μg of a structurally robust mouse PrP protein and wrapped in 100% cotton paper to avoid extraneous contamination. This containment was placed in a second layer of 100% cotton paper to increase stability during treatment. The samples were treated with different temperatures and for differing numbers of moisture saturation and microwave cycles, e.g., as disclosed in the '469 patent application. After treatment, the samples were prepared in loading buffer and boiled. Half of each sample was then run on a denaturing protein gel. After Western Blot analysis, it was possible to see that certain combinations of temperature and treatment cycles completely destroyed the stable protein samples, shown by the absence of protein bands of gel indicated at 294, 296,
Example 4: Evaluation of Destruction of Prion Proteins Contained within Polypropylene Tubes
[0104] Additional experiments were conducted to demonstrate that with the combination of one or more of heat, saturating moisture and microwaves as disclosed in the '469 patent application could destroy the defined surrogate stable PrP proteins if the samples were contained within a vessel such as a polypropylene tube. In this example, samples of the defined prion surrogate proteins were created that each contained about 1 μg of a structurally robust mouse protein. However, instead of drying the protein samples onto filter paper, the 1 μg samples were dried within polypropylene tubes of different lengths including 0.75 cm and 3.5 cm in length. The tubes were closed at one end (on to which the samples were dried) and open at the other. The tubes were contained within 2 layers of 100% cotton paper to prevent cross contamination during treatment. The samples were subjected to sterilization by a combination of one or more of heat, a solvent, e.g., reverse osmois (RO) filtered water, and electromagnetic radiation with differing numbers of moisture saturation and radiation cycles, e.g., as disclosed in the '469 patent application. After treatment, the samples were prepared in loading buffer and boiled. Half of each sample was then run on a denaturing protein gel. After Western blot analysis, it was possible to see that certain combinations of temperature and treatment cycles completely destroyed the stable protein samples (as demonstrated by the absence of protein bands of gel). Other treatment conditions did not destroy the stable proteins. The results of the sterilization treatment of PrP samples dried onto filter paper and dried within a polypropylene tube were identical indicating that the method of containing the PrP sample did not alter the results.
Example 5: Comparison of Prion Protein Indicator Test Results and Mouse Model Prion Tests
[0105] All mice were kept in an AAALAC-accredited facility and handled in compliance with guidelines provided by the US Guide for the Care and Use of Laboratory Animals.
[0106] Creating Prion Infected Brain Homogenate: Brains from terminally ill C57BL/6 mice infected with 22 L prions were prepared as follows: each brain was homogenized (10%, w/v) in phosphate-buffered saline (PBS) by repeatedly passing the material first through an 18-gauge needle and then repeatedly through a 26 gauge needle. The brain homogenates were combined to make a stock preparation, diluted with PBS (1/10), aliquoted into 100 ul preps in 2 ml polypropylene freezing vials and frozen at −80° C. until use.
[0107] Division into treated and non-treated preps: frozen prion preps having the defined prion surrogate protein were allowed to thaw and the caps removed. In duplicate, samples were sterilized by a combination of one or more of heat, microwaves and saturating moisture, e.g., as disclosed in the '469 patent application. The used conditions were similar to the process disclosed in Example 4 above. In one example, the sterilization preferably includes: (A) 140° C., 100 cycles of microwave; (B) 100° C., 100 cycles of microwave; and (C) room temperature, 100 cycles with no microwaves. The Prion Protein Indicator Test having the defined surrogate protein samples were analyzed by Western Blot analysis as described in Example 4 above. Depending on treatment conditions, the test sample was completely destroyed (A), partially destroyed (B), or completely intact (C).
[0108] Testing infectiveness of Prion Prep: C57BL/6 mice aged 4-5 weeks were divided into 4 cohorts, 10 mice per cohort, to receive the samples that correlated with the following Prion Protein Indicator Test samples having the defined prion surrogate protein: (A) complete destruction; (B) partial destruction; (C) no treatment and (D) PBS control. After anesthesia each mouse was intracerebrally inoculated with a 20 ul-aliquot of the designated inoculum. The mice were observed up to one year after inoculation, unless they displayed terminal symptoms of PrP infection including persistent signs of ataxia, kyphosis, somnolence, and hind leg weakness. Terminally-ill mice were euthanized and their brains divided sagittally along the midline and place formalin fixation for histological analysis or flash-frozen in liquid nitrogen for protein analysis. At one year, all remaining mice (showed no obvious signs of neurologic disease) were euthanized and their brains also divided for histological analysis or protein analysis.
[0109] Results: Over the observation period, none of the mice that received either the PBS control (D) or the brain homogenate treated with the conditions that demonstrated complete destruction on the Prion Protein Indicator Test having the defined prion surrogate protein (A) demonstrated any symptoms of disease. After euthanization, none of the brains demonstrated any signs of prion disease. Western Blot analysis of the brains showed no increase in concentrations of PrP proteins over normal levels. The mice that received the brain homogenate and also received no sterilization treatment (C) or partial destruction (B) as indicated by the Priori Protein Indicator Test all demonstrated terminal symptoms of PrP infection before the completion of the 1 year observation period. Their brains demonstrated obvious signs of prion disease and by Western analysis, the concentration of PrP proteins were greatly increased over normal levels. Together the results of the mouse study indicated a clear correlation between the results from the Prion Protein Indicator Test results and the mouse model results.
Example 6: Comparing Amino Acid Sequence of Multiple Members of the Clostridium Genus
[0110] It is important to qualify the ability of a sterilization device, a deimmunization device, or a disinfection device to destroy bacteria of any Clostridium species that may be contaminating medical equipment or supplies. In this example, a defined quantity of the defined surrogate protein having the predetermined SEQ ID NO: 1 discussed above was subjected to sterilization, deimmunization, or disinfection to rapidly determine the effectiveness of the sterilization, deimmunization, or disinfection using Western Blot analysis, protein array analysis, or similar type analysis, and the antibody for the defined Clostridium surrogate protein shown above. In this example, to protect the human operators of the test, the defined surrogate protein needs to incorporate critical characteristics of Clostridium proteins that are critical for the survival and growth of members of the Clostridium genus while avoiding organisms that can infect humans.
[0111] To design the synthetic defined surrogate, Clostridium protein having the predetermined sequence, SEQ ID NO: 1, a protein analysis was conducted comparing the amino acid sequences of the suf I loci gene from multiple species of the Clostridium genus shown in Table 2 above. In this example, the Sequence IDs (found in Pubmed, www.ncbi.nlm.nih.gov/Pubmed/) for the suf I loci proteins, multiple Clostridium species, used for the comparative are shown in Table 5 below:
TABLE-US-00031 TABLE 5 (Clostridium). Sequences used to determine regions of high homology in suf I locus of multiple Clostridium Species. Species Sequence ID Clostridium sporogenes WP_061905762.1 Clostridium botulinum WP_011948579.1 Clostridium novyi WP_039217212.1
[0112] The protein produced by the suf I loci is fundamental to survival and growth of a wide range of spores, bacteria and fungus. In species of the Clostridium genus, the protein product of the suf I loci is called cotA and is critical for many live stages including strongly contributing to the stability of the spore coat.
[0113] To design the defined Clostridium surrogate protein having SEQ ID NO: 1, the specific amino acids from the proteins listed in Table 5 were aligned to determine amino acid sequence regions that are highly homologous in all evaluated Clostridium species as shown in
Example 7: Developing Western Test to Qualify Ability to Destroy Clostridium Test Protein
[0114] One purpose of developing the synthetic defined Clostridium surrogate protein is to provide a method for rapidly determining the effectiveness of sterilization, deimmunization, and/or disinfection by a device, such as sterilization device, deimmunization device, or disinfection device. In this example, the method for rapidly determining effective sterilization, deimmunization, and/or disinfection includes multiple steps including at least: 1) preparing the synthetic defined Clostridium surrogate protein test samples, 2) subjecting the defined Clostridium surrogate protein test samples to sterilization, deimmunization, or disinfection, and 3) using Western Blot or similar type analysis to visualize the effects of sterilization, deimmunization, or disinfection of defined Clostridium surrogate protein test samples. Successful sterilization, deimmunization, or disinfection has occurred when all the defined Clostridium surrogate protein test samples are fragmented and as a result of the protein fragmentation, none remains to bind to the visualization antibodies indicating the defined Clostridium surrogate protein was destroyed. If sterilization, deimmunization, or disinfection was not successful, protein bands will be seen on the Western Blot analysis.
[0115] Following the process more fully described for the Prion test, a similar process was followed to create the Clostridium sterilization, deimmunization, and/or disinfection test. First, to create the sample for the test using the defined Clostridium surrogate protein, DNA encoding the amino acid SEQ ID NO: 1 for Clostridium above was synthesized and cloned into standard vectors both for E. coli and yeast expression. Using standard techniques, large quantities of protein were produced in E. coli or yeast and isolated by standard recombinant methods. Using a nickel column, a full-length defined Clostridium surrogate protein (171 amino acids long) was isolated. To create the samples having the defined Clostridium surrogate protein to qualify sterilization, deimmunization, or disinfection of the samples were dried onto small filter papers, dried inside small tubes or a surface of an object subjected to sterilization, deimmunization, or disinfection e.g., using cycles of applying a solvent and microwave energy as disclosed in the '469 patent application.
[0116] After sterilization, deimmunization, or disinfection, the treated Clostridium samples were transferred to tubes, denatured and separated by size and transferred to nylon membrane before being permanently cross-linked to the membrane. The final steps include incubating the nylon membrane with a primary antibody that specifically binds to the defined Clostridium surrogate protein of interest. In the experiments discussed herein, the primary anti-suf I loci encoded protein antibody was a rabbit polyclonal antibody that was raised against a synthetic peptide discussed above for SEQ ID NO: 1 residues. For added sensitivity, addition antibodies, both monoclonal and polyclonal, were raised against the other synthetic peptide(s). For the Western Blot Analysis, a secondary antibody may be a HRP-labelled goat anti-rabbit to enable visualization of the protein fragments, both intact and fragmented. If the defined Clostridium surrogate proteins have completely fragmented no bands will be visualize on the Western blot. Very small fragments and amino acids will be too small to be retained on the gel. When successful sterilization, deimmunization, or disinfection occurred, the visualized Western blot has a dark ban in the untreated control sample, e.g., indicated at 210,
Example 8: Comparing Amino Acid Sequence of Multiple Members of the Bacillus Genus
[0117] It is important to qualify the ability of a sterilization device, a deimmunization device or disinfection device to destroy bacteria of any Bacillus species that may be contaminating medical equipment or supplies. In this example, a defined quantity of the defined Bacillus surrogate protein having the predetermined SEQ ID NO: 2 discussed above is subjected to sterilization, deimmunization, or disinfection to rapidly determine the effectiveness of the sterilization, deimmunization, or disinfection using Western Blot analysis, protein array analysis, or similar type analysis, and the antibody for the defined Bacillus surrogate protein shown above. In this example, to protect the human operators of the test, the defined surrogate Bacillus surrogate protein needs to incorporate critical characteristics of Bacillus proteins that are critical for the survival and growth of members of the Bacillus genus while avoiding organisms that can infect humans.
[0118] To design the synthetic defined surrogate Bacillus protein having SEQ ID NO: 2, a protein analysis was conducted comparing the amino acid sequences of the suf I loci gene from multiple species of the Bacillus genus shown in Table 2 above. In this example, the Sequence IDs (found in Pubmed, www.ncbi.nlm.nih.gov/Pubmed/) for the suf I loci encoded proteins, multiple Bacillus species, used for the comparative are shown in Table 6 below.
TABLE-US-00032 TABLE 6 (Bacillus). Sequences used to determine regions of high homology in suf 1 locus of multiple Bacillus Species. Species Sequence ID Bacillus subtilis AAB62305.1 Bacillus atrophaeus WP_011948579.1 Bacillus pumilus WP_039217212.1
[0119] The protein produced by the suf I loci is fundamental to survival and growth of a wide range of spores, bacteria and fungus. In species of the Bacillus genus, the protein product of the suf I loci is called cotA and is critical for many live stages including strongly contributing to the stability of the spore coat.
[0120] To design the synthetic defined Bacillus surrogate protein for SEQ ID NO: 2, the specific amino acids from the proteins listed in Table 6 were aligned to determine amino acid sequence regions that are highly homologous in all evaluated Bacillus species as shown in
Example 9: Developing Western Test to Qualify Ability to Destroy Bacillus Test Protein
[0121] One purpose of developing the synthetic defined Bacillus surrogate protein is to provide a method for rapidly determining the effectiveness of sterilization, deimmunization, and/or disinfection by a device, such as a sterilization device, deimmunization device, or disinfection device. The method for rapidly determining effective sterilization, deimmunization, and/or disinfection preferably includes multiple steps including at least: 1) preparing synthetic defined Bacillus surrogate protein test samples, 2) subjecting the Bacillus surrogate protein test samples to sterilization, deimmunization, or disinfection, and 3) using Western Blot or similar analysis to visualize the effects of sterilization, deimmunization, or disinfection of defined Bacillus surrogate protein test samples. Successful sterilization, deimmunization, or disinfection has occurred when all the defined Bacillus surrogate protein test samples are fragmented and as a result of the protein fragmentation, none remains to bind to the visualization antibodies indicating the defined Bacillus surrogate protein was destroyed. If sterilization, deimmunization, or disinfection was not successful, protein bands will be see on the Western Blot analysis.
[0122] Following the process more fully described for the Prion test, a similar process was followed to create the Bacillus sterilization, deimmunization, and/or disinfection test. First, to create the sample for the test using the synthetic defined Bacillus surrogate protein, DNA encoding the amino acid for SEQ ID NO: 2 above was synthesized and cloned into standard vectors both for E. coli and yeast expression. Using standard techniques, large quantities of the defined Bacillus surrogate protein were produced in E. coli or yeast and isolated by standard recombinant methods. Using a nickel column, a full-length defined Bacillus surrogate protein (171 amino acids long) was isolated. To create the samples having the synthetic defined Bacillus surrogate protein to qualify sterilization, deimmunization, and/or disinfection the samples were dried onto small filter papers, dried inside small tubes or a surface of an object subjected to sterilization, deimmunization, or disinfection, e.g., using cycles of applying a solvent and microwave energy, e.g., as disclosed in the '469 patent application.
[0123] After sterilization deimmunization and/or disinfection, the treated Bacillus samples were transferred to tubes, denatured and separated by size and transferred to nylon membrane before being permanently cross-linked to the membrane. The final steps include incubating the nylon membrane with a primary antibody that specifically binds to the defined Bacillus surrogate proteins. In the experiments discussed herein, the primary anti-suf I loci protein antibody was a rabbit polyclonal antibody that was raised against a synthetic peptide discussed above for SEQ ID NO: 2 residues. For added sensitivity, addition antibodies, both monoclonal and polyclonal, were raised against the other synthetic peptide(s). For the Western Blot Analysis, a secondary antibody may be a HRP-labelled goat anti-rabbit to enable visualization of the protein fragments, both intact and fragmented. If the defined Bacillus surrogate proteins have completely fragmented no bands will be visualize on the Western blot. Very small fragments and amino acids will be too small to be retained on the gel. When successful sterilization, deimmunization, or disinfection occurred, the visualized Western blot has a dark ban in the untreated control sample, e.g., indicated at 220,
Example 10: Comparing Amino Acid Sequence of Multiple Members of the Mycobacterium Genus
[0124] It is important to qualify the ability of a sterilization device, a deimmunization device, or a disinfection device to destroy bacteria of any Mycobacterium species that may be contaminating medical equipment or supplies. In this example, a defined quantity of the defined surrogate protein having a SEQ ID NO: 3 discussed above is subjected to sterilization, deimmunization, or disinfection to rapidly determine the effectiveness of the sterilization, deimmunization, or disinfection using Western Blot analysis, protein array analysis, or similar type analysis and using an antibody specific for the protein. In this example, to protect the human operators of the test, the defined Mycobacterium surrogate protein needs to incorporate critical characteristics of Mycobacterium proteins that are critical for the survival and growth of members of the Mycobacterium genus while avoiding organisms that can infect humans.
[0125] To design the synthetic defined Mycobacterium surrogate protein SEQ ID NO: 3 above, a protein analysis was conducted comparing the amino acid sequences of the suf I loci gene from multiple species of the Mycobacterium genus shown in Table 2 above. In this example, the Sequence IDs (found in Pubmed, www.ncbi.nlm.nih.gov/Pubmed/) for the suf 1 loci proteins, multiple Mycobacterium species, used for the comparative are shown in Table 7 below:
TABLE-US-00033 TABLE 7 (Mycobacteria). Sequences used to determine regions of high homology in suf 1 locus of multiple Mycobacterium Species. Species Sequence ID Mycobacterium tuberculosis WP_003404392.1 Mycobacterium africanum KBG17039.1 Mycobacterium kansasii WP_023367763.1
[0126] The protein produced by the suf I loci is fundamental to survival and growth of a wide range of spores, bacteria and fungus. In species of the Mycobacterium genus, the protein product of the suf I loci is called cumA and is critical for many live stages including cell survival and growth.
[0127] To design the synthetic defined Mycobacterium surrogate protein having SEQ ID NO: 3, the specific amino acids from the proteins listed in Table 7 were aligned to determine amino acid sequence regions that are highly homologous in all evaluated Mycobacterium species as shown in
Example 11: Developing Western Test to Qualify Ability to Destroy Mycobacterium Test Protein
[0128] One purpose of developing the defined Mycobacterium surrogate protein is to provide a method for rapidly determining the effectiveness of sterilization, deimmunization, and/or disinfection by a device, such as a sterilization device, a deimmunization device, or a disinfection device. The method for rapidly determining effective sterilization, deimmunization, and/or disinfection preferably includes multiple steps including at least: 1) preparing the defined Mycobacterium surrogate protein test samples, 2) subjecting the defined Mycobacterium surrogate protein test samples to sterilization, deimmunization, or disinfection, and 3) using Western Blot or similar analysis to visualize the effects of sterilization, deimmunization, and/or disinfection of synthetic defined Mycobacterium surrogate protein test samples. Successful sterilization, deimmunization, and/or disinfection has occurred when all the synthetic defined Mycobacterium surrogate protein test samples are fragmented and as a result of the protein fragmentation, none remains to bind to the visualization antibodies indicating the defined Mycobacterium protein was destroyed. If sterilization, deimmunization, and/or disinfection was not successful, protein bands will be see on the Western Blot analysis.
[0129] Following the process more fully described for the Prion test, a similar process was followed to create the Mycobacterium sterilization, deimmunization, and/or disinfection test. First, to create the sample for the test using the defined Mycobacterium surrogate protein, DNA encoding the amino acid SEQ ID NO: 3 above was synthesized and cloned into standard vectors both for E. coli and yeast expression. Using standard techniques, large quantities of protein were produced in E. coli or yeast and isolated by standard recombinant methods. Using a nickel column, a full-length synthetic Mycobacterium surrogate protein (171 amino acids long) was isolated. To create the samples having the Mycobacterium surrogate protein to qualify sterilization, deimmunization, and/or disinfection the samples were dried onto small filter papers, dried inside small tubes or a surface of an object subjected to sterilization, deimmunization, and/or disinfection, e.g., using cycles of applying a solvent and microwave energy as disclosed in the '469 patent application.
[0130] After sterilization, deimmunization, and/or disinfection the treated Mycobacterium surrogate protein samples were transferred to tubes, denatured and separated by size and transferred to nylon membrane before being permanently cross-linked to the membrane. The final steps include incubating the nylon membrane with a primary antibody that specifically binds to the protein of interest. In the experiments discussed herein, the primary anti-suf I loci protein antibody was a rabbit polyclonal antibody that was raised against a synthetic peptide discussed above for SEQ ID NO: 3 for Mycobacterium above residues. For added sensitivity, addition antibodies, both monoclonal and polyclonal, were raised against the other synthetic peptide(s). For the Western Blot Analysis, a secondary antibody may be a HRP-labelled goat anti-rabbit to enable visualization of the protein fragments, both intact and fragmented. If the Mycobacterium surrogate proteins have completely fragmented no bands will be visualize on the Western blot. Very small fragments and amino acids will be too small to be retained on the gel. When successful sterilization, deimmunization, and/or disinfection has occurred, the visualized Western blot has a dark ban in the untreated control sample, e.g., indicated at 236,
Example 12: Comparing Amino Acid Sequence of Multiple Members of the Staphylococcus Genus
[0131] It is important to qualify the ability of a sterilization device, a deimmunization device, or a disinfection device to destroy bacteria of any Staphylococcus species that may be contaminating medical equipment or supplies. In this example, a defined quantity of the defined Staphylococcus surrogate protein having the predetermined SEQ ID NO: 4 discussed above is subjected to sterilization, deimmunization, or disinfection to rapidly determine the effectiveness of the sterilization, deimmunization, or disinfection using Western Blot analysis, protein array analysis, or similar type analysis and the antibody specific for the defined Staphylococcus surrogate protein. In this example, to protect the human operators of the test, the synthetic defined Staphylococcus surrogate protein needs to incorporate critical characteristics of Staphylococcus proteins that are critical for the survival and growth of members of the Staphylococcus genus while avoiding organisms that can infect humans.
[0132] To design the synthetic defined Staphylococcus surrogate protein having SEQ ID NO: 4, a protein analysis was conducted comparing the amino acid sequences of the sup loci gene from multiple species of the Staphylococcus genus shown in Table 2 above. In this example, the Sequence IDs (found in Pubmed, www.ncbi.nlm.nih.gov/Pubmed/) for the suf I loci proteins, multiple Staphylococcus species, used for the comparative are shown in Table 8 below:
TABLE-US-00034 TABLE 8 (Staphylucoccus). Sequences used to determine regions of high homology in Suf I locus of multiple Staphylucoccus Species. Species Sequence ID Staphylucoccus aureus WP_000282432.1 Staphylucoccus epidermidis WP_023567454.1 Staphylucoccus saprophyticus OEK13316.1
[0133] The protein produced by the suf I loci is fundamental to survival and growth of a wide range of spores, bacteria and fungus. In species of the Staphylococcus genus, the protein product of the suf I loci is called cueO and is critical for many live stages including strongly contributing to cell survival and growth
[0134] To design the synthetic defined Staphylococcus surrogate protein, the specific amino acids from the proteins listed in Table 8 were aligned to determine amino acid sequence regions that are highly homologous in all evaluated Staphylococcus species as shown in
Example 13: Developing Western Test to Qualify Ability to Destroy Staphylococcus Test Protein
[0135] One purpose of developing the defined Staphylococcus surrogate protein is to provide a method for rapidly determining the effectiveness of sterilization, deimmunization, and/or disinfection device, such as sterilization device, deimmunization device, or disinfection device and/or supplies. The method for rapidly determining effective sterilization, deimmunization, and/or disinfection includes multiple steps including at least: 1) preparing synthetic defined Staphylococcus surrogate protein test samples, 2) subjecting the defined Staphylococcus surrogate protein test samples to sterilization, deimmunization, and/or disinfection, and 3) using Western Blot or similar analysis to visualize the effects of sterilization, deimmunization, and/or disinfection of defined Staphylococcus surrogate protein test samples of the defined surrogate protein. Successful sterilization has occurred when all the defined Staphylococcus surrogate protein test samples are fragmented and as a result of the protein fragmentation, none remains to bind to the visualization antibodies indicating the defined Staphylococcus surrogate protein was destroyed. If sterilization, deimmunization, and/or disinfection was not successful, protein bands will be see on the Western Blot analysis.
[0136] Following the process more fully described for the Prion test, a similar process was followed to create the Staphylococcus sterilization, deimmunization, or disinfection test. First to create the sample for the test using the synthetic defined Staphylococcus surrogate protein, DNA encoding the amino acid SEQ ID NO: 4 above was synthesized and cloned into standard vectors both for E. coli and yeast expression. Using standard techniques, large quantities of the defined Staphylococcus surrogate protein were produced in E. coli or yeast and isolated by standard recombinant methods. Using a nickel column, a full-length defined Staphylococcus surrogate protein (171 amino acids long) was isolated. To create the samples having the synthetic defined Staphylococcus surrogate protein to qualify sterilization, deimmunization, and/or disinfection the samples were dried onto small filter papers, dried inside small tubes or a surface of an object subjected to sterilization, deimmunization, and/or disinfection e.g., using cycles of applying a solvent and microwave energy as disclosed in the '469 patent application.
[0137] After sterilization, deimmunization, and/or disinfection, the treated defined Staphylococcus surrogate protein samples were transferred to tubes, denatured and separated by size and transferred to nylon membrane before being permanently cross-linked to the membrane. The final steps include incubating the nylon membrane with a primary antibody that specifically binds to the Staphylococcus surrogate protein of interest. In the experiments discussed herein, the primary anti-suf I loci protein antibody was a rabbit polyclonal antibody that was raised against a synthetic peptide discussed above for SEQ ID NO: 4 residues. For added sensitivity, addition antibodies, both monoclonal and polyclonal, were raised against the other synthetic peptide(s). For the Western Blot analysis, a secondary antibody may be a HRP-labelled goat anti-rabbit to enable visualization of the protein fragments, both intact and fragmented. If the defined Staphylococcus surrogate proteins have completely fragmented no bands will be visualize on the Western blot. Very small fragments and amino acids will be too small to be retained on the gel. When successful sterilization, deimmunization, and/or disinfection occurred, the visualized Western blot has a dark ban in the untreated control sample, indicated at 250,
Example 14: Comparing Amino Acid Sequence of Multiple Members of the Pseudomonas Genus
[0138] It is important to qualify the ability of a sterilization device, a deimmunization device or disinfection device to destroy bacteria of any Pseudomonas species that may be contaminating medical equipment or supplies. In this example, a defined Pseudomonas surrogate protein quantity of the defined surrogate protein having a predetermined SEQ ID NO: 5 discussed above is subjected to sterilization, deimmunization, or disinfection to rapidly determine the effectiveness of the sterilization, deimmunization, or disinfection using Western Blot analysis, protein array analysis, or similar type analysis, and using an antibody specific for the defined Pseudomonas surrogate protein shown above. In this example, to protect the human operators of the test, the defined Pseudomonas surrogate protein needs to incorporate critical characteristics of Pseudomonas proteins that are critical for the survival and growth of members of the Pseudomonas genus while avoiding organisms that can infect humans.
[0139] To design the synthetic defined Pseudomonas surrogate protein having SEQ ID NO: 5, a protein analysis was conducted comparing the amino acid sequences of the suf loci gene from multiple species of the Pseudomonas genus shown in Table 2 above. In this example, the Sequence IDs (found in Pubmed, www.ncbi.nlm.nih.gov/Pubmed/) for the suf I loci Table 9 below:
TABLE-US-00035 TABLE 9 Pseudomonas. Sequences used to determine regions of high homology in suf 1 locus of multiple Pseudomonas Species. Species Sequence ID Pseudomonas aeruginosa WP_023096478.1 Pseudomonas fluorescens WP_003227851.1 Pseudomonas putida WP_019750583.1
[0140] The protein produced by the suf 1 loci is fundamental to survival and growth of a wide range of spores, bacteria and fungus. In species of the Pseudomonas genus, the protein product of the suf 1 loci is called cumA and is critical for many live stages including strongly contributing to the cell survival and growth
[0141] To design the defined Pseudomonas surrogate protein, the specific amino acids from the proteins listed in Table 9 were aligned to determine amino acid sequence regions that are highly homologous in all evaluated Pseudomonas species as shown in
Example 15: Developing Western Test to Qualify Ability to Destroy Pseudomonas Test Protein
[0142] One purpose of developing the defined Pseudomonas surrogate protein test is to create a method for rapidly determining the effectiveness of sterilization, deimmunization, and/or disinfection by a device, such as a sterilization device, a deimmunization device, or a disinfection device. The method for rapidly determining effective sterilization, deimmunization, and/or disinfection preferably includes multiple steps including at least: 1) preparing synthetic defined Pseudomonas surrogate protein test samples, 2) subjecting the synthetic Pseudomonas surrogate protein test samples to sterilization, deimmunization, and/or disinfection, and 3) using Western Blot or similar analysis to visualize the effects of sterilization, deimmunization, and/or disinfection of synthetic defined Pseudomonas surrogate test samples. Successful sterilization has occurred when all the defined Pseudomonas surrogate protein test samples are fragmented and as a result of the protein fragmentation, none remains to bind to the visualization antibodies indicating the defined Pseudomonas surrogate protein was destroyed. If sterilization, deimmunization, and/or disinfection was not successful, protein bands will be see on the Western Blot analysis.
[0143] Following the process more fully described for the Prion test, a similar process was followed to create the defined Pseudomonas sterilization, deimmunization and/or disinfection test. First, to create the sample for the test using the defined Pseudomonas surrogate protein, DNA encoding the amino acid SEQ ID NO: 5 defined above was synthesized and cloned into standard vectors both for E. coli and yeast expression. Using standard techniques, large quantities of the defined Pseudomonas surrogate protein were produced in E. coli or yeast and isolated by standard recombinant methods. Using a nickel column, a full-length synthetic defined Pseudomonas surrogate protein (171 amino acids long) was isolated. To create the samples having the synthetic defined surrogate protein to qualify sterilization, deimmunization, and/or disinfection of the samples were dried onto small filter papers, dried inside small tubes or a surface of an object subjected to sterilization, deimmunization, and/or disinfection, e.g., using cycles of applying a solvent and microwave energy as disclosed in the '469 patent application.
[0144] After sterilization, deimmunization, and/or disinfection, the treated defined Pseudomonas surrogate protein samples were transferred to tubes, denatured and separated by size and transferred to nylon membrane before being permanently cross-linked to the membrane. The final steps include incubating the nylon membrane with a primary antibody that specifically binds to the defined Pseudomonas surrogate protein. In the experiments discussed herein, the primary anti-suf 1 loci protein antibody was a rabbit polyclonal antibody that was raised against a synthetic peptide discussed above for SEQ ID NO: 5 residues. For added sensitivity, addition antibodies, both monoclonal and polyclonal, were raised against the other synthetic peptide(s). For the Western Blot Analysis, a secondary antibody may be a HRP-labelled goat anti-rabbit to enable visualization of the protein fragments, both intact and fragmented. If the synthetic defined Pseudomonas surrogate proteins have completely fragmented no bands will be visualize on the Western blot. Very small fragments and amino acids will be too small to be retained on the gel. When successful sterilization, deimmunization, or disinfection occurred, the visualized Western blot has a dark ban in the untreated control sample, e.g., indicated at 266,
Example 16: Comparing Amino Acid Sequence of Multiple Members of the Trichophyton Genus
[0145] It is important to qualify the ability of a sterilization device, a deimmunization device, and/or a disinfection device to destroy bacteria of any Trichophyton species that may be contaminating medical equipment. In this example, a defined quantity of the defined Trichophyton surrogate protein having a predetermined SEQ ID NO: 6 discussed above is subjected to sterilization, deimmunization, or disinfection to rapidly determine the effectiveness of the sterilization, deimmunization, or disinfection using Western Blot analysis, protein array analysis, or similar type analysis and using the antibody specific for the defined Trichophyton surrogate protein. In this example, to protect the human operators of the test, the synthetic defined Trichophyton surrogate protein needs to incorporate critical characteristics of Trichophyton proteins that are critical for the survival and growth of members of the Trichophyton genus while avoiding organisms that can infect humans.
[0146] To design the synthetic defined Trichophyton surrogate protein having the SEQ ID NO: 6, a protein analysis was conducted comparing the amino acid sequences of the suf I loci gene from multiple species of the Trichophyton genus shown in Table 2 above. In this example, the Sequence IDs (found in Pubmed, www.ncbi.nhn.nih.gov/Pubmed/) for the suf I loci proteins, multiple Trichophyton species, used for the comparative are shown in Table 10 below:
TABLE-US-00036 TABLE 10 Trichophyton. Sequences used to determine regions of high homology in suf 1 locus of Trichophyton Species. Species Sequence ID Trichophyton rubrum XP_003236812.1 Trichophyton tonsurane EGD95875.1
[0147] The protein produced by the suf 1 loci is fundamental to survival and growth of a wide range of spores, bacteria and fungus. In species of the Trichophyton genus, the protein product of the suf 1 loci is called laccase and is critical for many live stages including strongly contributing to cell survival and growth
[0148] To design the synthetic defined Trichophyton surrogate protein, the specific amino acids from the proteins listed in Table 10 above were aligned to determine amino acid sequence regions that are highly homologous in all evaluated Trichophyton species as shown in
Example 17: Developing Western Test to Qualify Ability to Destroy Trichophyton Test Protein
[0149] One purpose of developing the defined Trichophyton surrogate protein is to provide a method for rapidly determining the effectiveness of sterilization, deimmunization, and/or disinfection by a device, such as sterilization device, a deimmunization device, or a disinfection device. The method for rapidly determining effective sterilization, deimmunization, or disinfection preferably includes multiple steps including at least: 1) preparing synthetic defined Trichophyton surrogate protein test samples, 2) subjecting the defined Trichophyton surrogate protein test samples to sterilization, deimmunization, or disinfection, and 3) using Western Blot or similar analysis to visualize the effects of sterilization, deimmunization, or disinfection of defined Trichophyton surrogate protein test samples. Successful sterilization, deimmunization, or disinfection has occurred when all the defined Trichophyton surrogate protein test samples are fragmented and as a result of the protein fragmentation, none remains to bind to the visualization antibodies indicating the defined Trichophyton surrogate protein was destroyed. If sterilization, deimmunization and/or disinfection was not successful, protein bands will be see on the Western Blot analysis.
[0150] Following the process more fully described for the Prion test, a similar process was followed to create the Trichophyton sterilization, deimmunization and/or disinfection test. First, to create the sample for the test using the synthetic defined Trichophyton surrogate protein, DNA encoding the amino acid SEQ ID NO: 7 above was synthesized and cloned into standard vectors both for E. coli and yeast expression. Using standard techniques, large quantities of defined Trichophyton surrogate protein were produced in E. coli or yeast and isolated by standard recombinant methods. Using a nickel column, a full-length synthetic defined Trichophyton surrogate protein (171 amino acids long) was isolated. To create the samples having the synthetic defined Trichophyton surrogate protein to qualify sterilization, deimmunization, or disinfection, the defined Trichophyton surrogate protein samples were dried onto small filter papers, dried inside small tubes or a surface of an object subjected to sterilization, deimmunization and/or disinfection, e.g., using cycles of applying a solvent and microwave energy as disclosed in the '469 patent application.
[0151] After sterilization, deimmunization, or disinfection, the treated Trichophyton samples were transferred to tubes, denatured and separated by size and transferred to nylon membrane before being permanently cross-linked to the membrane. The final steps include incubating the nylon membrane with a primary antibody that specifically binds to the protein of interest. In the experiments discussed herein, the primary anti-suf 1 loci protein antibody was a rabbit polyclonal antibody that was raised against a synthetic peptide discussed above for SEQ ID NO: 6 residues. For added sensitivity, addition antibodies, both monoclonal and polyclonal, were raised against the other synthetic peptide(s). For the Western Blot analysis, a secondary antibody may be a HRP-labelled goat anti-rabbit to enable visualization of the protein fragments, both intact and fragmented. If the proteins have completely fragmented no bands will be visualize on the Western blot. Very small fragments and amino acids will be too small to be retained, on the gel. When successful sterilization, deimmunization, or disinfection has occurred, the visualized Western blot has a dark ban in the untreated control sample, e.g., indicated at 276,
Example 18: Comparing Amino Acid Sequence of Multiple Members of the Candida Genus
[0152] It is important to qualify the ability of a sterilization device, a deimmunization device, or disinfection device, to destroy bacteria of any Candida species that may be contaminating medical equipment. In this example, a defined quantity of the defined Candida surrogate protein having a predetermined SEQ ID NO: 7 discussed above is subjected to sterilization, deimmunization, or disinfection to rapidly determine the effectiveness of the sterilization, deimmunization, or disinfection using Western Blot analysis, protein array analysis, or similar type analysis and the antibody specific for the defined Candida surrogate protein. In this example, to protect the human operators of the test, the defined Candida surrogate protein needs to incorporate critical characteristics of Candida proteins that are critical for the survival and growth of members of the Candida genus while avoiding organisms that can infect humans.
[0153] To design the synthetic defined Candida surrogate protein having the SEQ ID NO: 7, a protein analysis was conducted comparing the amino acid sequences of the suf 1 loci gene from multiple species of the Candida genus shown in Table 2 above. In this example, the Sequence IDs (found in Pubmed, www.ncbi.nlm.nih.gov/Pubmed/) for the suf 1 loci proteins, multiple Candida species, used for the comparative are shown in Table 11 below:
TABLE-US-00037 TABLE 11 (Candida). Sequences used to determine regions of high homology in Suf I locus of Candida Species. Species Sequence ID Candida albicans KHC71512.1 Candida dubliniensis XP_002420841.1 Candida tropicalis XP_002548698.1 Candida auris XP_018169615.1
[0154] The protein produced by the suf I loci is fundamental to survival and growth of a wide range of spores, bacteria and fungus. In species of the Candida genus, the protein product of the suf I loci is called laccase and is critical for many live stages including strongly contributing to cell survival and growth
[0155] To design the synthetic defined Candida surrogate protein, the specific amino acids from the proteins listed in Table 11 were aligned to determine amino acid sequence regions that are highly homologous in all evaluated Candida species as shown in
Example 19: Developing Western Test to Qualify Ability to Destroy Candida Test Protein
[0156] One purpose of developing the defined Candida surrogate protein test is to provide a method for rapidly determining the effectiveness of sterilization, deimmunization, and/or disinfection by a device, such as a sterilization device, a deimmunization device, or a disinfection device. The method for rapidly determining effective sterilization, deimmunization, and/or disinfection includes multiple steps preferably including at least: 1) preparing synthetic defined Candida surrogate protein test samples, 2) subjecting the defined Candida surrogate protein test samples to sterilization, deimmunization, or disinfection, and 3) using Western Blot or similar analysis to visualize the effects of sterilization, deimmunization, or disinfection of defined Candida surrogate protein test samples. Successful sterilization, deimmunization, or disinfection has occurred when all the defined Candida surrogate protein test samples are fragmented and as a result of the protein fragmentation, none remains to bind to the visualization antibodies indicating the defined Candida surrogate protein was destroyed. If sterilization, deimmunization, or disinfection was not successful, protein bands will be see on the Western Blot analysis.
[0157] Following the process more fully described for the Prion test, a similar process was followed to create the defined Candida surrogate protein sterilization, deimmunization and/or disinfection test. First, to create the sample for the synthetic defined Candida surrogate protein test using the defined Candida surrogate protein, DNA encoding the amino acid SEQ ID NO: 7 was synthesized and cloned into standard vectors both for E. coli and yeast expression. Using standard techniques, large quantities of protein were produced in E. coli or yeast and isolated by standard recombinant methods. Using a nickel column, a full-length synthetic defined Candida surrogate protein (171 amino acids long) was isolated. To create the samples having the synthetic defined Candida surrogate protein to qualify sterilization, deimmunization, or disinfection, the samples having the defined Candida surrogate protein were dried onto small filter papers, dried inside small tubes or a surface of an object subjected to sterilization, deimmunization, and/or disinfection, e.g., using cycles of applying a solvent and microwave energy as discussed in the '469 patent application.
[0158] After sterilization, deimmunization, or disinfection, the treated defined Candida surrogate protein samples were transferred to tubes, denatured and separated by size and transferred to nylon membrane before being permanently cross-linked to the membrane. The final steps include incubating the nylon membrane with a primary antibody that specifically binds to the defined Candida surrogate protein. In the experiments discussed herein, the primary anti-suf 1 loci protein antibody was a rabbit polyclonal antibody that was raised against a synthetic peptide discussed above for SEQ ID NO: 7 residues. For added sensitivity, addition antibodies, both monoclonal and polyclonal, were raised against the other synthetic peptide(s). For the Western Blot analysis, a secondary antibody may be a HRP-labelled goat anti-rabbit to enable visualization of the protein fragments, both intact and fragmented. If the proteins have completely fragmented no bands will be visualize on the Western blot. Very small fragments and amino acids will be too small to be retained on the gel. When successful sterilization, deimmunization, or disinfection has occurred, the visualized Western blot has a dark ban in the untreated control sample, indicated at 286,
Example 20: Immobilizing Proteins onto a Solid Surface
[0159] Many processes and solid substrates are well known in the art for immobilizing proteins onto a solid surface. In this example, glass slides were obtained having round wells created by printing the glass with highly water-repellent mark, e.g., as shown by multi-well glass slides 130, 134,
[0160] In this example, the defined Clostridium surrogate protein having SEQ ID NO: 1 was diluted in TG buffer (50 mM Tris-HCl (pH 8.0), 10% (v/v) glycerol) to 200 μg/ml. Different quantities of the defined Clostridium surrogate protein, e.g., 200 ng, 100 ng, 50 ng, 25 ng, 12.5 ng, 6.25 ng, 3.125 ng, 1.562 ng, 0.781 ng and 0 ng, were spotted in individual wells, e.g., the wells exemplarily indicated at 132 and 136,
Example 21: Comparing Amino Acid Sequence of α-Gliadin from Appropriate Human Consumed Grains
[0161] To develop a test to qualify the ability of a sterilization device, deimmunization, or disinfection to destroy medically important immunogenic proteins, such as α-gliadin, that may be contaminating medical equipment, the following experiments were conducted. In this example, to rapidly detect effective deimmunization, a defined quality of an isolated protein needs to be deimmunized with a deimmunization device, e.g., using cycles of a combination of a solvent and electromagnetic microwaves radiation, e.g., microwaves, as disclosed in the '469 patent application and then evaluated by Western Blot analysis using an antibody specific for the protein. To design a candidate protein to serve as the representative defined surrogate α-gliadin protein having a predetermined sequence, the translated sequences of representative α-gliadin genes from many commonly consumed human grains were aligned. See Table 13 and Table 14 below. Gliadin protein is the immunogenic component of gluten and must be avoided by Celiac patients.
TABLE-US-00038 TABLE 13 Sequence ID of α-Gliadin Proteins or Prolamins in Common Grains Used to Design Recombinant Protein Sequence. Sequence ID Common Name Species Name Number w/Link Bread Wheat Triticum aestivum pir||A27319 Common Wheat Triticum sphaerococcum ABQ45316.1 Durum wheat/Pasta Triticum turgidum subsp. ADA83698.1 Wheat durum Farro/Emmer Wheat Triticum dicoccon AKC91191.1 Macha Wheat Triticum macha AKC91223.1 Rye Secale cereale AFK32718.1 Spelt/Dinkel Wheat Triticum spelta APU92351.1 Red Wild Einkor Triticum urartu AKC91171.1 Precursor αGliadin Triticum aestivum Q41545 Bateman et al 2004
TABLE-US-00039 TABLE 14 Additional α-Gliadin Protein Sequences that could be used to design Recombinant Protein. Sequence Species Common ID Species Common Name Sequence ID Triticum Bread pir||A27319 Triticum Durum wheat, pasta ADA83698.1 aestivum Wheat P04726.1 turgidum wheat or macaroni ADA83690.1 subsp. wheat durum AED99851.1 Triticum Emmer wheat or Farro AKC91191.1 dicoccon SCW25751.1 Triticum red wild einkor AKC91171.1 urartu AHY37812.1 Triticum Macha wheat AKC91223.1 macha AHY37818.1 Secale Rye AFK32718.1 cereale AFX69612.1 ABQ52118.1 Aegilops Tausch's goatgrass AFX69602.1 AFX69616.1 tauschii XP_020186089.1 AFX69586.1 AKC91337.1 Triticum Common ABQ45316.1 ABQ52112.1 sphaerococcum wheat Triticum spelta Spelt or APU92351.1 Aegilops Sharon goatgrass AMS25611.1 dinkel APU92675.1 sharonensis AMS25610.1 wheat APU92554.1 AMS25614.1 APU92300.1 Aegilops Goatgrass AKC91312.1 searsii APU92425.1 AKC91311.1 APU92357.1 Aegilops Goatgrass AHN85624.1 speltoides APU92415.1 Aegilops Goatgrass AHN85626.1 speltoides APU92583.1 Aegilops Goatgrass AEV55370.1 uniaristata APU92336.1 Thinopyrum Wild Thinopyrum ADP94197.1 APU92334.1 bessarabicum grasses
In this example, the defined α-Gliadin surrogate protein has the following predetermined sequence:
For α-Gliadin:
[0162]
TABLE-US-00040 (SEQ ID NO: 8) 10 20 30 40 50 MKTVRVPVPQ PQPQNPSQPQ PQRQVPLVQQ QQFPGQQQQF PPQQPYPQPQ PFPSQQPYLQ LQPFPQPQPF PPQLPYHHHH HH
The peptide used for the development of monoclonal or polyclonal antibody used by Western Blot analysis for the above sequence is:
TABLE-US-00041 (SEQ ID NO: 24) FPPQQPYPQPQPFPSQQPYLQLQPFPQPQ
A fragment of this peptide (KLQPFPQPELPYPQPQ (SEQ ID NO: 25)) in form is the medically important immunogen is CD.
[0163] If the defined α-Gliadin surrogate proteins have completely fragmented, no bands will be visualized on the Western Blot. Very small fragments in amino acid would be too small to be retained on the gel. When successful deimmunization, in this example, has occurred, the visualized Western Blot has a dark band in the untreated control sample, e.g., indicated at 420,
[0164] Confirmatory tests were conducted by including samples of intact wheat flour using a combination of cycles of a solvent and microwaves, e.g., as disclosed in the '469 patent application. After treatment, the intact wheat flour samples were processed following industry standard protocols to test for the presence of gluten in food stuffs.
[0165] Although specific features of the invention are shown in some drawings and not in others, this is for convenience only as each feature may be combined with any or all of the other features in accordance with the invention. The words “including”, “comprising”, “having”, and “with” as used herein are to be interpreted broadly and comprehensively and are not limited to any physical interconnection. Moreover, any embodiments disclosed in the subject application are not to be taken as the only possible embodiments. Other embodiments will occur to those skilled in the art and are within the following claims.
[0166] In addition, any amendment presented during the prosecution of the patent application for this patent is not a disclaimer of any claim elementpresented in the application as filed: those skilled in the art cannot reasonably be expected to draft a claim that would literally encompass all possible equivalents, many equivalents will be unforeseeable at the time of the amendment and are beyond a fair interpretation of what is to be surrendered (if anything), the rationale underlying the amendment may bear no more than a tangential relation to many equivalents, and/or there are many other reasons the applicant cannot be expected to describe certain insubstantial substitutes for any claim element amended.