Patent classifications
C12Q2561/101
Method for Detecting a Mutation in a Microsatellite Sequence
The invention relates to a method for detecting a mutation in a microsatellite sequence locus of a target fragment from a DNA sample, comprising subjecting said DNA sample to a digital polymerase chain reaction (PCR) in the presence of a PCR solution comprising: a pair of primers for amplifying said target fragment of the DNA sample including said microsatellite sequence; a first MS oligonucleotide (MS) hydrolysis probe, labeled with a first fluorophore, wherein said first MS oligonucleotide probe is complementary to a wild-type sequence including the microsatellite sequence; a second oligonucleotide reference (REF) hydrolysis probe, labeled with a second fluorophore, wherein said second oligonucleotide REF probe is complementary to a wild-type sequence of said target DNA fragment which does not include said microsatellite sequence. The invention also encompasses methods for the diagnosis and prognosis of cancer and a method for determining the efficacy of a cancer treatment.
Method for Detecting a Mutation in a Microsatellite Sequence
The invention relates to a method for detecting a mutation in a microsatellite sequence locus of a target fragment from a DNA sample, comprising subjecting said DNA sample to a digital polymerase chain reaction (PCR) in the presence of a PCR solution comprising: a pair of primers for amplifying said target fragment of the DNA sample including said microsatellite sequence; a first MS oligonucleotide (MS) hydrolysis probe, labeled with a first fluorophore, wherein said first MS oligonucleotide probe is complementary to a wild-type sequence including the microsatellite sequence; a second oligonucleotide reference (REF) hydrolysis probe, labeled with a second fluorophore, wherein said second oligonucleotide REF probe is complementary to a wild-type sequence of said target DNA fragment which does not include said microsatellite sequence. The invention also encompasses methods for the diagnosis and prognosis of cancer and a method for determining the efficacy of a cancer treatment.
METHODS, TOOLS AND SYSTEMS FOR THE PREDICTION AND ASSESSMENT OF GESTATIONAL DIABETES
Provided is a method of assessing Gestational Diabetes Mellitus (GDM) susceptibility in a female human subject, the method comprising determining the identity of at least one allele at each of at least two positions of single nucleotide polymorphism (SNP) selected from: TCF7L2rs7903146; IGF2BP2rs4402960; CDKN2A/Brs10811661; SLC16A11rs13342232; FTOrs8050136; SLC30A8rs13266634; CDC123/CAMK1Drs12779790; KCNQ1rs2237892; CUBNrs11254363; CUBNrs1801222; FIGNrs2119289; FIGNrs982393; MTHFRrs1801131; MTHFRrs1801133; MTRrs1805087; and SLC19A1rs1051266, and/or an SNP in linkage disequilibrium therewith at r.sup.2>0.8. Also provided are genotyping tools and risk assessment systems for use in the method of assessing GDM susceptibility.
METHODS AND DEVICES FOR DIGITAL PCR
A method comprises flowing a plurality of sample droplets in a continuous flow of a carrier fluid, immiscible with the sample droplets, such that the droplets are separated from each other by the carrier fluid, wherein an average number of copies of target nucleic acid contained in each droplet the plurality of sample droplets is one or fewer. The method may further comprise subjecting the droplets to thermal cycling sufficient to allow amplification of the target nucleic acid, and detecting one or more of the presence or absence of amplified target nucleic acid in the droplets.
METHODS AND DEVICES FOR DIGITAL PCR
A method comprises flowing a plurality of sample droplets in a continuous flow of a carrier fluid, immiscible with the sample droplets, such that the droplets are separated from each other by the carrier fluid, wherein an average number of copies of target nucleic acid contained in each droplet the plurality of sample droplets is one or fewer. The method may further comprise subjecting the droplets to thermal cycling sufficient to allow amplification of the target nucleic acid, and detecting one or more of the presence or absence of amplified target nucleic acid in the droplets.
DETECTION OF TARGET NUCLEIC ACID SEQUENCES BY PTO CLEAVAGE AND EXTENSION-DEPENDENT EXTENSION ASSAY
The present invention relates to the detection of a target nucleic acid sequence by a PTOCE-E (PTO Cleavage and Extension-dependent Extension) assay. The PTOCE-E assay of the present invention can reduce the non-target signal and increase the target signal as compared with the conventional PTOCE and PCE-SH methods, thereby enabling more accurate detection of the target nucleic acid sequence.
DETECTION OF TARGET NUCLEIC ACID SEQUENCES BY PTO CLEAVAGE AND EXTENSION-DEPENDENT EXTENSION ASSAY
The present invention relates to the detection of a target nucleic acid sequence by a PTOCE-E (PTO Cleavage and Extension-dependent Extension) assay. The PTOCE-E assay of the present invention can reduce the non-target signal and increase the target signal as compared with the conventional PTOCE and PCE-SH methods, thereby enabling more accurate detection of the target nucleic acid sequence.
Probes for improved melt discrimination and multiplexing in nucleic acid assays
Methods and compositions for the detection and quantification of nucleic acids are provided. In certain embodiments, methods involve the use of cleavable probes that comprise a ribonucleotide position that is susceptible to endoribonuclease (e.g., RNase H) cleavage in the presence of target nucleic acid molecules. Probes of the embodiments may also comprise non-natural nucleotide linked to a reporter and/or quenching moiety.
Probes for improved melt discrimination and multiplexing in nucleic acid assays
Methods and compositions for the detection and quantification of nucleic acids are provided. In certain embodiments, methods involve the use of cleavable probes that comprise a ribonucleotide position that is susceptible to endoribonuclease (e.g., RNase H) cleavage in the presence of target nucleic acid molecules. Probes of the embodiments may also comprise non-natural nucleotide linked to a reporter and/or quenching moiety.
Detection of a target nucleic acid sequence using two different detection temperatures
The present invention relates to detection of a target nucleic acid sequence in a sample using two different detection temperatures. The present invention using difference between signals detected at two detection temperatures enables to decrease well-to-well variation or sample-to-sample variation generated in real-time PCR processes in more convenient and effective manner.