Chimeric Antigen Receptor and Natural Killer Cells Expressing Same
20230025506 · 2023-01-26
Inventors
- Yu Kyeong Hwang (Yongin-si, KR)
- Sung Yoo Cho (Yongin-si, KR)
- Sung Yong Won (Yongin-si, KR)
- Ho Yong Lim (Yongin-si, KR)
- Jung Hyun Her (Yongin-si, KR)
- Mi Young Jung (Yongin-si, KR)
- Hyun Ah Kim (Yongin-si, KR)
- Su Hyun Gwon (Yongin-si, KR)
- Eun Sol Lee (Yongin-si, KR)
- Han Sol Kim (Yongin-si, KR)
Cpc classification
C07K16/2851
CHEMISTRY; METALLURGY
C07K14/705
CHEMISTRY; METALLURGY
A61K35/17
HUMAN NECESSITIES
C07K2319/33
CHEMISTRY; METALLURGY
C07K16/00
CHEMISTRY; METALLURGY
C07K2317/73
CHEMISTRY; METALLURGY
C07K16/283
CHEMISTRY; METALLURGY
A61K2039/5154
HUMAN NECESSITIES
C07K14/70596
CHEMISTRY; METALLURGY
C07K14/70575
CHEMISTRY; METALLURGY
C07K14/70578
CHEMISTRY; METALLURGY
A61P35/00
HUMAN NECESSITIES
International classification
A61K35/17
HUMAN NECESSITIES
Abstract
The present invention provides a chimeric antigen receptor and natural killer cells expressing the same, and particularly, a chimeric antigen receptor (CAR) which includes an intracellular signaling domain including the whole or a portion of an OX40 ligand (CD252), thereby having excellent effects of increasing anticancer activity of immune cells, and immune cells expressing the same.
Claims
1.-30. (canceled)
31. A chimeric antigen receptor comprising: (i) a first domain comprising the amino acid sequence of SEQ ID NO:14; and (ii) a second domain comprising the amino acid sequence of SEQ ID NO: 17.
32. The chimeric antigen receptor of claim 31, further comprising (iii) a third domain comprising the amino acid sequence of amino acids 67-107 of SEQ ID NO:11 (RSKRSRLLHSDYMNMTPRRPGPTRKHYQPYAPPRDFAAYRS), or the amino acid sequence of SEQ ID NO: 23.
33. A chimeric antigen receptor comprising a polypeptide comprising: (i) a first domain comprising the amino acid sequence of SEQ ID NO: 14; and (ii) a second domain comprising the amino acid sequence of SEQ ID NO: 17; and (ii) a third domain comprising the amino acid sequence of SEQ ID NO: 23.
34. A chimeric antigen receptor comprising a polypeptide comprising: (i) a first domain comprising the amino acid sequence of SEQ ID NO: 14; and (ii) a second domain comprising the amino acid sequence of SEQ ID NO: 17; and (ii) a third domain comprising the amino acid sequence of amino acids 67-107 of SEQ ID NO:11 (RSKRSRLLHSDYMNMTPRRPGPTRKHYQPYAPPRDFAAYRS).
35. The chimeric antigen receptor of claim 34, wherein the first domain is oriented C-terminally of the second domain and the second domain is oriented C-terminally of the third domain.
36. The chimeric antigen receptor of claim 34, further comprising: (iv) a fourth domain comprising the amino acid sequence of amino acids 40-66 of SEQ ID NO: 11 (FWVLVVVGGVLACYSLLVTVAFIIFWV).
37. The chimeric antigen receptor of claim 35, further comprising: (iv) a fourth domain comprising the amino acid sequence of amino acids 40-66 of SEQ ID NO: 11 (FWVLVVVGGVLACYSLLVTVAFIIFWV), wherein the third domain is oriented C-terminally of the fourth domain.
38. The chimeric antigen receptor of claim 34, further comprising: (iv) a fourth domain comprising the amino acid sequence of the amino acid sequence of amino acids 49-72 of SEQ ID NO: 8 (IYIWAPLAGTCGVLLLSLVITLYC).
39. The chimeric antigen receptor of claim 35, further comprising: (iv) a fourth domain comprising the amino acid sequence of the amino acid sequence of amino acids 49-72 of SEQ ID NO: 8 (IYIWAPLAGTCGVLLLSLVITLYC), wherein the third domain is oriented C-terminally of the fourth domain.
40. The chimeric antigen receptor of claim 36, further comprising: (v) a fifth domain comprising the amino acid sequence of amino acids 1-48 of SEQ ID NO: 8 (IYIWAPLAGTCGVLLLSLVITLYC).
41. The chimeric antigen receptor of claim 37, further comprising: (v) a fifth domain comprising the amino acid sequence of amino acids 1-48 of SEQ ID NO: 8 (IYIWAPLAGTCGVLLLSLVITLYC), wherein the fourth domain is oriented C-terminally of the fifth domain.
42. The chimeric antigen receptor of claim 38, further comprising: (v) a fifth domain comprising the amino acid sequence of amino acids 1-48 of SEQ ID NO: 8 (IYIWAPLAGTCGVLLLSLVITLYC).
43. The chimeric antigen receptor of claim 39, further comprising: (v) a fifth domain comprising the amino acid sequence of amino acids 1-48 of SEQ ID NO: 8 (IYIWAPLAGTCGVLLLSLVITLYC), wherein the fourth domain is oriented C-terminally of the fifth domain.
44. The chimeric antigen receptor of claim 36, further comprising: (v) a fifth domain comprising the amino acid sequence of the amino acid sequence of amino acids 1-39 of SEQ ID NO: 11 TABLE-US-00005 (IEVMYPPPYLDNEKSNGTIIHVKGKHLCPSPLFPGPSKP)
45. The chimeric antigen receptor of claim 37, further comprising: (v) a fifth domain comprising the amino acid sequence of the amino acid sequence of amino acids 1-39 of SEQ ID NO: 11 (IEVMYPPPYLDNEKSNGTIIHVKGKHLCPSPLFPGPSKP) wherein the fourth domain is oriented C-terminally of the fifth domain.
46. The chimeric antigen receptor of claim 38, further comprising: (v) a fifth domain comprising the amino acid sequence of the amino acid sequence of amino acids 1-39 of SEQ ID NO: 11 TABLE-US-00006 (IEVMYPPPYLDNEKSNGTIIHVKGKHLCPSPLFPGPSKP)
47. The chimeric antigen receptor of claim 39, further comprising: (v) a fifth domain comprising the amino acid sequence of the amino acid sequence of amino acids 1-39 of SEQ ID NO: 11 (IEVMYPPPYLDNEKSNGTIIHVKGKHLCPSPLFPGPSKP) wherein the fourth domain is oriented C-terminally of the fifth domain.
48. A nucleic acid sequence encoding the chimeric antigen receptor according to claim 31.
49. An immune cell expressing the chimeric antigen receptor according to claim 31.
50. The immune cell of claim 49, wherein the immune cell is a natural killer cell.
51. A method of treating cancer, the method comprising: administering the immune cell according to claim 50 to a subject in need thereof.
Description
DESCRIPTION OF DRAWINGS
[0050]
[0051]
[0052]
[0053]
[0054]
[0055]
[0056]
[0057]
[0058]
[0059]
[0060]
[0061]
[0062]
[0063]
[0064]
[0065]
[0066]
[0067]
[0068]
[0069]
[0070]
[0071]
BEST MODE
[0072] The present invention discloses a chimeric antigen receptor and NK cells expressing the same, and more particularly, a chimeric antigen receptor (CAR) with excellent effects of increasing anticancer activity of immune cells, by including an intracellular signaling domain which contains the whole or a portion of OX40 ligand (CD252), as well as immune cells expressing the same.
[0073] Hereinafter, the present invention will be described in detail.
[0074] The chimeric antigen receptor of the present invention may include an intracellular signaling domain which contains the whole or a portion of OX40 ligand (CD252).
[0075] According to one embodiment of the present invention, the chimeric antigen receptor may be one further including a transmembrane domain linked to the intracellular signaling domain; a spacer domain linked to the transmembrane domain; and an extracellular domain linked to the spacer domain. In addition, according to one embodiment of the present invention, the chimeric antigen receptor may be one further including a signal sequence linked to a terminal of the extracellular domain that is not linked with the spacer domain. According to one embodiment of the present invention, the above-described domains may be directly linked to one another or may be linked by a linker.
[0076] According to one embodiment of the present invention, the signal sequence may allow the extracellular domain to be positioned outside a cell membrane of immune cells (e.g., NK cells) when the chimeric antigen receptor is expressed. For example, the signal sequence may include the whole or a portion of CD16.
[0077] According to one embodiment of the present invention, the extracellular domain is a domain to be specifically linked to an antibody or to specifically recognize an antigen, and may include, for example, an Fc receptor, an antigen-binding fragment such as a single-chain variable fragment (ScFv) in an antibody, a natural cytotoxicity receptor, NKG2D, 2B4 or DNAM-1. Accordingly, in the present disclosure, the term “extracellular domain” is used with the same meanings as “antigenic recognition site,” “antigen-binding fragment” and/or “antibody binding site.”
[0078] The chimeric antigen receptor according to one embodiment of the present invention may include an Fc receptor as the extracellular domain and thus be used associated with different antibodies depending on cell types of cancer to be treated. According to one embodiment, the Fc receptor may be any one selected from the group consisting of CD16, CD32, CD64, CD23 and CD89. According to a more specific embodiment, the Fc receptor may be one including the whole or a portion of the CD16 V158 variant (CD16V).
[0079] According to another embodiment, the chimeric antigen receptor of the present invention may further include an antigen-binding fragment of an antibody, as an extracellular domain, which can directly recognize the antigen without co-administration along with the antibody. According to one embodiment, the antigen-binding fragment may be an Fab fragment, F(ab′) fragment, F(ab′)2 fragment or Fv fragment. According to one embodiment of the present invention, the antibody may be any one of various types of antibodies capable of binding antigen-specifically, briefly, having antigen-specific binding ability. For example, the antibody may be one in which one light chain and one heavy chain are bonded with each other, or one in which two light chains and two heavy chains are bonded with each other. For example, when two light chains and two heavy chains are bonded with each other, the antibody may be one in which a first unit including a first light chain and a first heavy chain bonded with each other and a second unit including a second light chain and a second heavy chain bonded with each other are combined with each other. Herein, the bond may be a disulfide bond, but it is not limited thereto. According to embodiments of the present invention, the above two units may be the same as or different from each other. For example, the first unit including the first light chain and the first heavy chain and the second unit including the second light chain and the second heavy chain may be the same as or different from each other. As such, an antibody prepared to recognize two different antigens by the first unit and the second unit, respectively, is typically referred to as a ‘bispecific antibody.’ In addition, for example, the antibody may be one in which three or more of the above-described units are combined with one another. The antigen-binding fragment of the present invention may be derived from various types of antibodies as described above, but it is not limited thereto.
[0080] According to another embodiment of the present invention, the extracellular domain used herein may be a natural killer receptor (also referred to as a ‘natural cytotoxicity receptor’). According to a specific embodiment, the NK receptor may include NKp46, NKp30, NKp44, NKp80 and NKp65 receptors, but it is not limited thereto.
[0081] According to one embodiment of the present invention, the transmembrane domain penetrates through the cell membrane, and may be any one without limitation as long as the domain can penetrate through the cell membrane without interfering with functions of the extracellular domain and the intracellular signaling domain. For example, the transmembrane domain may include the whole or a portion of any one selected from the group consisting of CD8α and CD28.
[0082] According to one embodiment of the present invention, the extracellular domain and the transmembrane domain may be linked to each other by a spacer domain. For example, the spacer domain may be a hinge domain. According to a specific embodiment, the spacer domain may include the whole or a portion of any one selected from the group consisting of CD8α and CD28.
[0083] According to one embodiment of the present invention, the intracellular signaling domain is a portion located on an inner side of the cell membrane of NK cell, that is, on the cytoplasm thereof, and may include a sequence that can transmit a signal to activate NK cells when an antibody linked to the extracellular domain is combined with a target antigen.
[0084] According to one embodiment of the present invention, the chimeric antigen receptor may include one or more intracellular signaling domain(s). When including two or more intracellular signaling domains, the intracellular signaling domains may be linked in series with each other. For example, when including three intracellular signaling domains, a terminal of a first intracellular signaling domain may be linked to a terminal of the transmembrane domain that is not linked with the spacer domain, a terminal of a second intracellular signaling domain may be linked to a terminal of the first intracellular signaling domain that is not linked with the transmembrane domain, and a terminal of a third intracellular signaling domain may be linked to a terminal of the second intracellular signaling domain that is not linked with the first intracellular signaling domain. That is, the first, second and third intracellular signaling domains may be arranged in order from a cell membrane toward an inside of the cell. Further, even when including two, four or more intracellular signaling domains, these domains may be linked to one another in the same manner as described above. According to one embodiment of the present invention, such the respective domains may be directly linked to one another or may be linked by a linker.
[0085] According to one embodiment of the present invention, the chimeric antigen receptor may include two intracellular signaling domains. For example, the chimeric antigen receptor may include a first intracellular signaling domain linked to the transmembrane domain and a second intracellular signaling domain linked to a terminal of the first intracellular signaling domain that is not linked with the transmembrane domain. According to a more specific embodiment, the first intracellular signaling domain may include the whole or a portion of any one selected from the group consisting of OX40 (CD134), OX40 ligand (OX40L, CD252), 4-1BB (CD137), CD28, DAP10, CD3-zeta (CD3ζ) and DAP12, and the second intracellular signaling domain may include the whole or a portion of any one selected from the group consisting of OX40 ligand, CD3-zeta and DAP12. In this case, at least one of the first intracellular signaling domain and the second intracellular signaling domain includes the whole or a portion of OX40 ligand. For example, the chimeric antigen receptor may include a first intracellular signaling domain containing the whole or a portion of OX40 ligand and a second intracellular signaling domain containing the whole or a portion of any one selected from CD3-zeta and DAP12. Further, for example, the chimeric antigen receptor may include a first intracellular signaling domain containing the whole or a portion of any one selected from the group consisting of CD3-zeta and DAP12 and a second intracellular signaling domain containing the whole or a portion of OX40 ligand.
[0086] According to another embodiment of the present invention, the chimeric antigen receptor may include three intracellular signaling domains. For example, the chimeric antigen receptor may include: a first intracellular signaling domain linked to the transmembrane domain; a second intracellular signaling domain linked to a terminal of the first intracellular signaling domain that is not linked with the transmembrane domain; and a third intracellular signaling domain linked to a terminal of the second intracellular signaling domain that is not linked with the first intracellular signaling domain. According to a more specific embodiment, the first intracellular signaling domain may include the whole or a portion of any one selected from the group consisting of 4-1BB, OX40, OX40 ligand, CD28 and DAP10, the second intracellular signaling domain may include the whole or a portion of any one selected from the group consisting of OX40 ligand, OX40 and 4-1BB, and the third intracellular signaling domain may include the whole or a portion of any one selected from the group consisting of OX40 ligand, CD3-zeta and DAP12. In such a case, at least one of the first intracellular signaling domain, the second intracellular signaling domain and the third intracellular signaling domain may include the whole or a portion of OX40 ligand.
[0087] In another aspect, the present invention may provide a chimeric antigen receptor, which includes: a first intracellular signaling domain containing the whole or a portion of any one selected from the group consisting of CD28 and 4-1BB; a second intracellular signaling domain containing the whole or a portion of any one selected from the group consisting of OX40 ligand, OX40 and 4-1BB; and a third intracellular signaling domain containing the whole or a portion of CD3-zeta, wherein the first, second and third intracellular signaling domains are arranged in order from the cell membrane toward the inside of the cell. According to one embodiment of the present invention, the above respective domains may be directly linked to one another or may be linked by a linker.
[0088] According to one embodiment of the present invention, the chimeric antigen receptor may further include: a transmembrane domain linked to the first intracellular signaling domain; a spacer domain linked to the transmembrane domain; and an extracellular domain linked to the spacer domain. In addition, the chimeric antigen receptor may further include a signal sequence linked to the extracellular domain. According to one embodiment of the present invention, the above respective domains may be directly linked to one another or may be linked by a linker.
[0089] According to one embodiment of the present invention, the extracellular domain is a domain for specifically binding with an antibody or specifically recognizing an antigen, for example, an Fc receptor, an antigen-binding fragment of an antibody such as a single-chain variable fragment (ScFv), NK receptor (natural cytotoxicity receptor), NKG2D, 2B4 or DNAM-1, etc. Thus, in the present disclosure, the term “extracellular domain” is used with the same meanings as the “antigenic recognition site”, “antigen-binding fragment” and/or “antibody binding site.”
[0090] The chimeric antigen receptor according to an embodiment of the present invention may include an Fc receptor as the extracellular domain, and therefore, can be used along with a variety of antibodies depending on cell types of cancer to be treated. According to one embodiment, the Fc receptor may include any one selected from the group consisting of CD16, CD32, CD64, CD23 and CD89, and variants thereof. According to a more specific embodiment, the Fc receptor may include CD16 or variants thereof, and most specifically, may include the whole or a portion of CD16 V158 variant (CD16V).
[0091] According to another embodiment, the chimeric antigen receptor of the present invention may include, as the extracellular domain, an antigen-binding fragment of an antibody which directly recognizes the antigen without co-administration along with the antibody. According to one embodiment, the antigen-binding fragment may be an Fab fragment, F(ab′) fragment, F(ab′)2 fragment or Fv fragment. According to one embodiment of the present invention, the antibody may be any one of various types of antibodies capable of binding antigen-specifically. For example, the antibody may be one in which one light chain and one heavy chain are bonded with each other, or one in which two light chains and two heavy chains are bonded with each other. For example, when two light chains and two heavy chains are bonded with each other, the antibody may be one in which the first unit including the first light chain and the first heavy chain bonded with each other and the second unit including the second light chain and the second heavy chain bonded with each other are combined with each other. The bond may be a disulfide bond, but it is not limited thereto. According to an embodiment of the present invention, the above two units may be the same as or different from each other. For example, the first unit including the first light chain and the first heavy chain and the second unit including the second light chain and the second heavy chain may be the same as or different from each other. As such, an antibody prepared to recognize two different antigens by the first unit and the second unit, respectively, is commonly referred to as a ‘bispecific antibody’ in the related art. In addition, for example, the antibody may be one in which the above three or more units are combined with one another. The antigen-binding fragment of the present invention may be derived from various types of antibodies as described above, but it is not limited thereto.
[0092] According to another embodiment of the present invention, the extracellular domain used herein may be a NK receptor (natural cytotoxicity receptor). According to a specific embodiment, the NK receptor may include NKp46, NKp30, NKp44, NKp80 and NKp65 receptors, but it is not limited thereto.
[0093] According to one embodiment, the signal sequence may include the whole or a portion of CD16. According to another embodiment, the extracellular domain may include the whole or a portion of CD16 V158 variant (CD16V). According to another embodiment, the spacer domain may include the whole or a portion of any one selected from the group consisting of CD8α (CD8-alpha) and CD28. According to another embodiment, the transmembrane domain may include the whole or a portion of any one selected from the group consisting of CD8α and CD28.
[0094] According to a specific embodiment, the chimeric antigen receptor may include one or more amino acid sequence selected from the group consisting of SEQ ID NOs: 33, 41, 43, 45, 47, 49, 51, 53, 55, 69, 71, 77, 81, 83, 85, 87, 89, 91 and 93 or variants thereof having a sequence identity of 80% or more.
[0095] According to another aspect, the present invention provides immune cells (e.g., NK cells) to express the above-described chimeric antigen receptor according to the present invention.
[0096] The immune cells of the present invention may exhibit toxicity to tumor cells. It is determined that the chimeric antigen receptor according to the invention exhibits specific toxicity to what types of tumor cells depending on what types of antibodies are combined with the extracellular domains. Therefore, the types of tumor cells, to which the immune cells expressing the chimeric antigen receptor according to the present invention may exhibit specific toxicity, are not particularly limited. According to one embodiment, when the immune cells (e.g., NK cells) of the present invention are used along with rituximab, the cells may exhibit toxicity to malignant lymphoma cells. For example, the malignant lymphoma cells may express CD20. Further, for example, the malignant lymphoma may be B-cell lymphoma.
[0097] According to another aspect, the invention further provides a pharmaceutical composition for prevention or treatment of tumor or tumor metastasis, which includes the immune cells (e.g., NK cells) expressing the above-described chimeric antigen receptor according to the present invention, in the number of 2 to 7.5 times the number of tumor cells (e.g., malignant lymphoma cells) in a subject to be treated (‘treatment target’).
[0098] According to one embodiment of the present invention, the number of immune cells (e.g., NK cells) included in the pharmaceutical composition of the present invention in a single dose may range from 0.75 to 10 times the number of tumor cells (e.g., malignant lymphoma cells) in the treatment target. For example, the number of the immune cells (e.g., NK cells) in a single dose may range from 2 to 7.5 times the number of tumor cells (e.g., malignant lymphoma cells) in the treatment target.
[0099] According to another aspect, the present invention further provides a nucleic acid sequence encoding the above-described chimeric antigen receptor according to the present invention.
[0100] According to one embodiment of the present invention, the nucleic acid sequence may include one or more nucleotide sequences selected from the group consisting of SEQ ID NOs: 32, 40, 42, 44, 46, 48, 50, 52, 54, 68, 70, 76, 80, 82, 84, 86, 88, 90 and 92 or variants thereof having a sequence identity of 80% or more.
[0101] According to another aspect, the present invention further provides a vector including the above-described nucleic acid sequence according to the present invention.
[0102] According to another aspect, the present invention further provides a method of treating tumor which includes administering the above-described immune cells to a subject.
[0103] According to another aspect, the present invention further provides a method of preventing tumor metastases which includes administering the above-described immune cells to a subject.
[0104] The subject may be a mammal having a tumor, specifically, a human, but it is not limited thereto.
[0105] Administration may be performed in such a way that the number of immune cells (e.g., NK cells) expressing the chimeric antigen receptor according to the present invention may be in a range of 2 to 7.5 times the number of tumor cells (e.g., malignant lymphoma cells) in the treatment target.
[0106] An administration method is not particularly limited and, for example, may include administration through an oral or parenteral route.
[0107] Tumor is not particularly limited but may include, for example, malignant lymphoma, leukemia, breast cancer, lung cancer, etc., and more specifically, B-cell lymphoma.
[0108] Hereinafter, the present invention will be described in more detail by way of the following examples. These examples are proposed only for describing the present invention in detail and the scope of the present invention is not limited to the contents illustrated in the examples.
Example 1: Methods and Reagents
Cell Lines
[0109] The human B-series cell line Ramos, human erythroleukemic cell line K562, human breast cancer cell line MCF-7, H1299 and H1944 of human lung cancer cell lines, as well as NK-92MI are supplied from American Type Culture Collection (ATCC, Manassas, Va., USA). K562 was maintained in RPMI-1640 containing 10% FBS (Gibco, Grand Island, N.Y., USA). Ramos was maintained in RPMI-1640 (ATCC) (Manassas, Va.) containing 10% FBS (fetal bovine serum; Gibco, Grand Island, N.Y., USA). MCF-7 was maintained in EMEM (ATCC)+10% FBS (Gibco) medium, while H1299 and H1944 cell lines were maintained in RPMI-1640 (ATCC)+10% FBS (Gibco). In addition, NK-92MI and transduced NK-92MI cells were maintained in CellGro® serum-free medium containing 1% human plasma. The human embryonic kidney fibroblast, that is, 293T cell line was supplied from the ATCC. This cell line was maintained in DMEM (Gibco, Grand Island, N.Y., USA) containing 10% FBS (Gibco, Grand Island, N.Y., USA).
Plasmid
[0110] The signal sequence and the extracellular domain of the FCRG3A V158 mutant (CD16V); the extracellular domain of NKG2D; the signal sequence of CD8α, the hinge and transmembrane domains of CD8α; the hinge and transmembrane domains of CD28; and the intracellular signaling domains of 4-1BB, OX40, OX40 ligand (OX40L) and CD3ζ, respectively, were synthesized artificially. The above listed materials were assembled in various combinations through splicing by overlapping extension by PCR (‘SOE-PCR’). The PCR products were confirmed by direct sequencing. Each PCR product was cut into Nhe1 and EcoRI, and then inserted into (i.e., ligated to) Nhe1 and EcoRI sites of a 3.sup.rd generation self-inactivating lentiviral expression vector such as MSCV-EF1α-GFP vector or EF1a-MCS vector.
[0111] Chimeric antigen receptors (CAR) according to embodiments of the present invention have been summarized in Table 1 below. The domains of all CARs according to the embodiments of the present invention have been linked in series (in tandem) to one another and also linked in frame.
TABLE-US-00001 TABLE 1 Type of CAR Serial Signal (generation) No. Abbreviation sequence ECD Hinge TM Signal-1 Signal-2 Signal-3 — C1 NC CD16 CD16V CD8α CD8α 1st C2 CD16V-Z CD16 CD16V CD8α CD8α CD3ζ 2nd C3 CD16V-BBZ CD16 CD16V CD8α CD8α 4-1BB CD3ζ 2nd C4 CD16V-OX40Z CD16 CD16V CD8α CD8α OX40 CD3ζ 2nd C5 CD16V- CD16 CD16V CD8α CD8α OX40L CD3ζ OX40LZ 2nd C5-1 CD16V- CD16 CD16V CD8α CD8α CD3ζ OX40L ZOX40L 2nd C6 CD16V-28Z CD16 CD16V CD8α CD28 CD28 CD3ζ 2nd C7 CD16V-28(H)Z CD16 CD16V CD28 CD28 CD28 CD3ζ 3rd C8 CD16V- CD16 CD16V CD8α CD8α 4-1BB OX40 CD3ζ BBOX40Z 3rd C9 CD16V- CD16 CD16V CD8α CD8α OX40 4-1BB CD3ζ OX40BBZ 3rd C10 CD16V-28BBZ CD16 CD16V CD8α CD28 CD28 4-1BB CD3ζ 3rd C11 CD16V- CD16 CD16V CD8α CD28 CD28 OX40 CD3ζ 28OX40Z 3rd C12 CD16V- CD16 CD16V CD8α CD28 CD28 OX40L CD3ζ 28OX40LZ 3rd C13 CD16V- CD16 CD16V CD28 CD28 CD28 4-1BB CD3ζ 28(H)BBZ 3rd C14 CD16V- CD16 CD16V CD28 CD28 CD28 OX40 CD3ζ 28(H)OX40Z 3rd C15 CD16V- CD16 CD16V CD28 CD28 CD28 OX40L CD3ζ 28(H)OX40LZ 3rd C16 CD16V- CD16 CD16V CD8α CD8α 41BB OX40L CD3ζ BBOX40LZ
[0112] CD16V-Z CAR (1.sup.st generation) is produced by connecting: the signal sequence domain of CD16 (nucleotides 34-84, GenBank Accession No. X52645); the extracellular domain of CD16V (FCRG3A V158) (nucleotides 85-651, G mutation of nucleotide No. 559 in GenBank Accession No. X52645); human CD8α-derived hinge and transmembrane domains (nucleotides 1292-1507, GenBank NM 001768.6); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0113] CD16V-BBZ CAR (2.sup.nd generation) is produced by connecting: the signal sequence domain of CD16 (nucleotides 34-84, GenBank Accession No. X52645); the extracellular domain of CD16V (FCRG3A V158) (nucleotides 85-651, G mutation of nucleotide No. 559 in GenBank Accession No. X52645); human CD8α-derived hinge and transmembrane domains (nucleotides 1292-1507, GenBank NM 001768.6); CD137-derived intracellular signaling domain (nucleotides 901-1026, GenBank NM 001561.5); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0114] CD16V-OX40Z CAR (2.sup.nd generation) is produced by connecting: the signal sequence domain of CD16 (nucleotides 34-84, GenBank Accession No. X52645); the extracellular domain of CD16V (FCRG3A V158) (nucleotides 85-651, G mutation of nucleotide No. 559 in GenBank Accession No. X52645); human CD8α-derived hinge and transmembrane domains (nucleotides 1292-1507, GenBank NM 001768.6); CD134-derived intracellular signaling domain (nucleotides 733-840, GenBank AB590584.1); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0115] CD16V-OX40LZ CAR (2.sup.nd generation) is provided by connecting: the signal sequence domain of CD16 (nucleotides 34-84, GenBank Accession No. X52645); the extracellular domain of CD16V (FCRG3A V158) (nucleotides 85-651, G mutation of nucleotide No. 559 in GenBank Accession No. X52645); human CD8α-derived hinge and transmembrane domains (nucleotides 1292-1507, GenBank NM 001768.6); CD252-derived intracellular signaling domain (nucleotides 141-206, GenBank NM 003326.4); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0116] CD16V-ZOX40L CAR (2.sup.nd generation) is produced by connecting: the signal sequence domain of CD16 (nucleotides 34-84, GenBank Accession No. X52645); the extracellular domain of CD16V (FCRG3A V158) (nucleotides 85-651, G mutation of nucleotide No. 559 in GenBank Accession No. X52645); human CD8α-derived hinge and transmembrane domains (nucleotides 1292-1507, GenBank NM 001768.6); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); CD252-derived intracellular signaling domain (nucleotides 141-206, GenBank NM 003326.4); and stop codon TGA. CD16V-28Z CAR (2.sup.nd generation) is produced by connecting: the signal sequence domain of CD16 (34-84 nucleotides, GenBank Accession No. X52645); the extracellular domain of CD16V (FCRG3A V158) (nucleotides 85-651, G mutation of nucleotide No. 559 in GenBank Accession No. X52645); human CD8α-derived hinge domain (nucleotides 1292-1435, GenBank NM 001768.6); CD28-derived transmembrane and intracellular signaling domains (nucleotides 679-882, GenBank NM 006139.3); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0117] CD16V-28(H)Z CAR (2.sup.nd generation) is produced by connecting: the signal sequence domain of CD16 (nucleotides 34-84, GenBank Accession No. X52645); the extracellular domain of CD16V (FCRG3A V158) (nucleotides 85-651, G mutation of nucleotide No. 559 in GenBank Accession No. X52645); CD28-derived hinge, transmembrane and intracellular signaling domains (nucleotides 562-882, GenBank NM 006139.3); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0118] CD16V-BBOX40Z CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD16 (nucleotides 34-84, GenBank Accession No. X52645); the extracellular domain of CD16V (FCRG3A V158) (nucleotides 85-651, G mutation of nucleotide No. 559 in GenBank Accession No. X52645); human CD8α-derived hinge and transmembrane domains (nucleotides 1292-1507, GenBank NM 001768.6); CD137-derived intracellular signaling domain (nucleotides 901-1026, GenBank NM 001561.5); CD134-derived intracellular signaling domain (nucleotides 733-840, GenBank AB590584.1); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0119] CD16V-OX40BBZ CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD16 (nucleotides 34-84, GenBank Accession No. X52645); the extracellular domain of CD16V (FCRG3A V158) (nucleotides 85-651, G mutation of nucleotide No. 559 in GenBank Accession No. X52645); human CD8α-derived hinge and transmembrane domains (nucleotides 1292-1507, GenBank NM 001768.6); CD134-derived intracellular signaling domain (nucleotides 733-840, GenBank AB590584.1); CD137-derived intracellular signaling domain (nucleotides 901-1026, GenBank NM 001561.5); CD3-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0120] CD16V-28BBZ CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD16 (nucleotides 34-84, GenBank Accession No. X52645); the extracellular domain of CD16V (FCRG3A V158) (nucleotides 85-651, G mutation of nucleotide No. 559 in GenBank Accession No. X52645); CD8α-derived hinge domain (nucleotides 1292-1435, GenBank NM 001768.6); CD28-derived transmembrane and intracellular signaling domains (nucleotides 679-882, GenBank NM 006139.3); CD137-derived intracellular signaling domain (nucleotides 901-1026, GenBank NM 001561.5); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0121] CD16V-28OX40Z CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD16 (nucleotides 34-84, GenBank Accession No. X52645); the extracellular domain of CD16V (FCRG3A V158) (nucleotides 85-651, G mutation of nucleotide No. 559 in GenBank Accession No. X52645); CD8α-derived hinge domain (nucleotides 1292-1435, GenBank NM 001768.6); CD28-derived transmembrane and intracellular signaling domains (nucleotides 679-882, GenBank NM 006139.3); CD134-derived intracellular signaling domain (nucleotides 733-840, GenBank AB590584.1); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0122] CD16V-28OX40LZ CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD16 (nucleotides 34-84, GenBank Accession No. X52645); the extracellular domain of CD16V (FCRG3A V158) (nucleotides 85-651, G mutation of nucleotide No. 559 in GenBank Accession No. X52645); CD8α-derived hinge domain (nucleotides 1292-1435, GenBank NM 001768.6); CD28-derived transmembrane and intracellular signaling domains (nucleotides 679-882, GenBank NM 006139.3); CD252-derived intracellular signaling domain (nucleotides 141-206, GenBank NM 003326.4); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0123] CD16V-28(H)BBZ CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD16 (nucleotides 34-84, GenBank Accession No. X52645); the extracellular domain of CD16V (FCRG3A V158) (nucleotides 85-651, G mutation of nucleotide No. 559 in GenBank Accession No. X52645); CD28-derived hinge, transmembrane and intracellular signaling domains (nucleotides 562-882, GenBank NM 006139.3); CD137-derived intracellular signaling domain (nucleotides 901-1026, GenBank NM 001561.5); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0124] CD16V-28(H)OX40Z CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD16 (nucleotides 34-84, GenBank Accession No. X52645); the extracellular domain of CD16V (FCRG3A V158) (nucleotides 85-651, G mutation of nucleotide No. 559 in GenBank Accession No. X52645); CD28-derived hinge, transmembrane and intracellular signaling domains (nucleotides 562-882, GenBank NM 006139.3); CD134-derived intracellular signaling domain (nucleotides 733-840, GenBank AB590584.1); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0125] CD16V-28(H)OX40LZ CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD16 (nucleotides 34-84, GenBank Accession No. X52645); the extracellular domain of CD16V (nucleotides 85-651, G mutation of nucleotide No. 559 in GenBank Accession No. X52645); CD28-derived hinge, transmembrane and intracellular signaling domains (nucleotides 562-882, GenBank NM 006139.3); CD252-derived intracellular signaling domain (nucleotides 141-206, GenBank NM 003326.4); and CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3) and stop codon TGA.
[0126] CD16V-BBOX40LZ (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD16 (nucleotides 34-84, GenBank Accession No. X52645); the extracellular domain of CD16V (FCRG3A V158) (nucleotides 85-651, G mutation of nucleotide No. 559 in GenBank Accession No. X52645); human CD8α-derived hinge and transmembrane domains (nucleotides 1292-1507, GenBank NM 001768.6); CD137-derived intracellular signaling domain (nucleotides 901-1026, GenBank NM 001561.5); CD252-derived intracellular signaling domain (nucleotides 141-206, GenBank NM 003326.4); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0127] The sequence listings of the domains used for the chimeric antigen receptors (CARs) and a preparation method thereof according to the embodiments of the present invention are summarized in Table 2 below.
TABLE-US-00002 TABLE 2 Sequence No. Name of sequence Details of sequence 1 CD16 nucleotide Signal sequence and extracellular domain of CD16 (34-651 nucleotides, GenBank Accession No. X52645) 2 CD16 amino acid Amino acid sequence corresponding to SEQ ID NO. 1 3 CD16V nucleotide G mutation of nucleotide No. 559 among signal sequence and extracellular domain of CD16V (34-651 nucleotides, GenBank Accession No. X52645) 4 CD16V nucleotide codon Codon optimized sequence of SEQ ID NO. 3 optimization 5 CD16V amino acid Amino acid sequence corresponding to SEQ ID NOs. 3 and 4 6 CD8α nucleotide Human CD8α-derived hinge and transmembrane domains (1292-1507 nucleotides, GenBank NM 001768.6) 7 CD8α nucleotide codon Codon optimized sequence of SEQ ID NO. 6 optimization 8 CD8α amino acid Amino acid sequence corresponding to SEQ ID NOs. 6 and 7 9 CD28 nucleotide CD28-derived hinge, transmembrane and intracellular signaling domains (562-882 nucleotides, GenBank MM 006139.3) 10 CD28 nucleotide codon Codon optimized sequence of SEQ ID NO. 9 optimization 11 CD28 amino acid Amino acid sequence corresponding to SEQ ID NOs. 9 and 10 12 CD3ζ nucleotide CDζ-derived intracellular signaling domain (299-634 nucleotides, GenBank NM 000734.3) 13 CD3ζ nucleotide codon Codon optimized sequence of SEQ ID NO. 12 optimization 14 CD3ζ amino acid Amino acid sequence corresponding to SEQ ID NOs. 12 and 13 15 OX40L (CD252) nucleotide OX40L (CD252)-derived intracellular signaling domain (141- 206 nucleotides, GenBank NM 003326.4) 16 OX40L (CD252) nucleotide Codon optimized sequence of SEQ ID NO. 15 codon optimization 17 OX40L (CD252) amino acid Amino acid sequence corresponding to SEQ ID NOs. 15 and 16 18 OX40 (CD134) nucleotide OX40 (CD134)-derived intracellular signaling domain (733- 840 nucleotides, GenBank AB 590584.1) 19 OX40 (CD134) nucleotide Codon optimized sequence of SEQ ID NO. 18 codon optimization 20 OX40 (CD134) amino acid Amino acid sequence corresponding to SEQ ID NOs. 18 and 19 21 4-1BB (CD137) nucleotide 4-1BB (CD137)-derived intracellular signaling domain (901- 1026 nucleotides, GenBank NM 001561.5) 22 4-1BB (CD137) nucleotide Codon optimized sequence of SEQ ID NO. 21 codon optimization 23 4-1BB (CD137) amino acid Amino acid sequence corresponding to SEQ ID NOs. 21 and 22 24 CD16V-Z nucleotide Codon optimized nucleotide sequence of CD16V-Z CAR 25 CD16V-Z amino acid Amino acid sequence corresponding to SEQ ID NO. 24 26 CD16V-BBZ nucleotide Codon optimized nucleotide sequence of CD16V-BBZ CAR 27 CD16V-BBZ amino acid Amino acid sequence corresponding to SEQ ID NO. 26 28 CD16V-OX40Z nucleotide Codon optimized nucleotide sequence Of CD16V-OX40Z CAR 29 CD16V-OX40Z amino acid Amino acid sequence corresponding to SEQ ID NO. 28 30 CD16V-OX40LZ nucleotide Codon optimized nucleotide sequence of CD16V-OX30LZ CAR 31 CD16V-OX40LZ amino acid Amino acid sequence corresponding to SEQ ID NO. 30 32 CD16V-28Z nucleotide Codon optimized nucleotide sequence of CD16V-28Z CAR 33 CD16V-28Z amino acid Amino acid sequence corresponding to SEQ ID NO. 32 34 CD16V-28(H)Z nucleotide Codon optimized nucleotide sequence of CD16V-28(H)Z CAR 35 CD16V-28(H)Z amino acid Amino acid sequence corresponding to SEQ ID NO. 34 36 CD16V-BBOX40Z nucleotide Codon optimized nucleotide sequence of CD16V-BBOX40Z CAR 37 CD16V-BBOX40Z amino acid Amino acid sequence corresponding to SEQ ID NO. 36 38 CD16V-OX40BBZ nucleotide Codon optimized nucleotide sequence of CD16V-OX40BBZ CAR 39 CD16V-OX40BBZ amino acid Amino acid sequence corresponding to SEQ ID NO. 38 40 CD16V-28BBZ nucleotide Codon optimized nucleotide sequence of CD16V-28BBZ CAR 41 CD16V-28BBZ amino acid Amino acid sequence corresponding to SEQ ID NO. 40 42 CD16V-28OX40Z nucleotide Codon optimized nucleotide sequence of CD16V-28OX40Z CAR 43 CD16V-28OX40Z amino acid Amino acid sequence corresponding to SEQ ID NO. 42 44 CD16V-28OX40LZ nucleotide Codon optimized nucleotide sequence of CD16V-28OX40LZ CAR 45 CD16V-28OX40LZ amino acid Amino acid sequence corresponding to SEQ ID NO. 44 46 CD16V-28(H)BBZ nucleotide Codon optimized nucleotide sequence of CD16V-28(H)BBZ CAR 47 CD16V-28(H)BBZ amino acid Amino acid sequence corresponding to SEQ ID NO. 46 48 CD16V-28(H)OX40Z Codon optimized nucleotide sequence of CD16V- nucleotide 28(H)OX40Z CAR 49 CD16V-28(H)OX40Z amino Amino acid sequence corresponding to SEQ ID NO. 48 acid 50 CD16V-28(H)OX40LZ Codon optimized nucleotide sequence of CD16V- nucleotide 28(H)OX40LZ CAR 51 CD16V-28(H)OX40LZ amino Amino acid sequence corresponding to SEQ ID NO. 50 acid 52 CD16V-BBOX40LZ nucleotide Codon optimized nucleotide sequence of CD16V-BBOX40LZ CAR 53 CD16V-BBOX40LZ amino Amino acid sequence corresponding to SEQ ID NO. 52 acid 54 CD16V-ZOX40L nucleotide Codon optimized nucleotide sequence of CD16V-ZOX40L CAR 55 CD16V-ZOX40L amino acid Amino acid sequence corresponding to SEQ ID NO. 54
[0128] In addition, the chimeric antigen receptors (CARs) according to the embodiments of the present invention are summarized in Table 3 below. Domains of each of all CARs according to the embodiments of the present invention are linked in series (in tandem) to one other and also linked in the frame.
TABLE-US-00003 TABLE 3 Type of CAR Serial Signal (generation) No. Abbreviation sequence ECD Hinge TM Signal-1 Signal-2 Signal-3 — C17 NC CD8α NKG2D CD8α CD8α 1st C18 NKG2D-Z CD8α NKG2D CD8α CD8α CD3ζ 2nd C19 NKG2D-BBZ CD8α NKG2D CD8α CD8α 4-1BB CD3ζ 2nd C20 NKG2D- CD8α NKG2D CD8α CD8α OX40 CD3ζ OX40Z 2nd C21 NKG2D- CD8α NKG2D CD8α CD8α CD3ζ OX40L OX40L 2nd C22 NKG2D-28Z CD8α NKG2D CD8α CD28 CD28 CD3ζ 2nd C23 NKG2D- CD8α NKG2D CD28 CD28 CD28 CD3ζ 28(H)Z 3rd C24 NKG2D- CD8α NKG2D CD8α CD8α 4-1BB OX40 CD3ζ BBOX40Z 3rd C25 NKG2D- CD8α NKG2D CD8α CD8α 4-1BB OX40L CD3ζ BBOX40LZ 3rd C26 NKG2D- CD8α NKG2D CD8α CD8α OX40 4-1BB CD3ζ OX40BBZ 3rd C27 NKG2D- CD8α NKG2D CD8α CD28 CD28 4-1BB CD3ζ 28BBZ 3rd C28 NKG2D- CD8α NKG2D CD8α CD28 CD28 OX40 CD3ζ 28OX40Z 3rd C29 NKG2D- CD8α NKG2D CD8α CD28 CD28 OX40L CD3ζ 28OX40LZ 3rd C30 NKG2D- CD8α NKG2D CD28 CD28 CD28 4-1BB CD3ζ 28(H)BBZ 3rd C31 NKG2D- CD8α NKG2D CD28 CD28 CD28 OX40 CD3ζ 28(H)OX40Z 3rd C32 NKG2D- CD8α NKG2D CD28 CD28 CD28 OX40L CD3ζ 28(H)OX40LZ 3rd C33 NKG2D-AAA- CD8α NKG2D- CD28 CD28 CD28 OX40L CD3ζ 28(H)OX40LZ AAA
[0129] NKG2D-Z CAR (1.sup.st generat4ion) is produced by connecting: the signal sequence domain of CD8α (nucleotides 890-952, GenBank NM 001768.6); the extracellular domain of NKG2D (nucleotides 788-1192, GenBank ID: AF461811.1); human CD8α-derived hinge and transmembrane domains (nucleotides 1292-1507, GenBank NM 001768.6); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0130] NKG2D-BBZ CAR (2.sup.nd generation) is produced by connecting: the signal sequence domain of CD8α (nucleotides 890-952, GenBank NM 001768.6); the extracellular domain of NKG2D (nucleotides 788-1192, GenBank ID: AF461811.1); human CD8α-derived hinge and transmembrane domains (nucleotides 1292-1507, GenBank NM 001768.6); CD137-derived intracellular signaling domain (nucleotides 901-1026, GenBank NM 001561.5); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0131] NKG2D-OX40Z CAR (2.sup.nd generation) is produced by connecting: the signal sequence domain of CD8α (nucleotides 890-952, GenBank NM 001768.6); the extracellular domain of NKG2D (nucleotides 788-1192, GenBank ID: AF461811.1); human CD8α-derived hinge and transmembrane domains (nucleotides 1292-1507, GenBank NM 001768.6); CD134-derived intracellular signaling domain (nucleotides 733-840, GenBank AB590584.1); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0132] NKG2D-ZOX40L CAR (2.sup.nd generation) is produced by connecting: the signal sequence domain of CD8α (nucleotides 890-952, GenBank NM 001768.6); the extracellular domain of NKG2D (nucleotides 788-1192, GenBank ID: AF461811.1); human CD8α-derived hinge and transmembrane domains (nucleotides 1292-1507, GenBank NM 001768.6); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); CD252-derived intracellular signaling domain (nucleotides 141-206, GenBank NM 003326.4); and CD3ζ stop codon TGA.
[0133] NKG2D-28Z CAR (2.sup.nd generation) is produced by connecting: the signal sequence domain of CD8α (nucleotides 890-952, GenBank NM 001768.6); the extracellular domain of NKG2D (nucleotides 788-1192, GenBank ID: AF461811.1); human CD8α-derived hinge domain (nucleotides 1292-1435, GenBank NM 001768.6); CD28-derived transmembrane and intracellular signaling domains (nucleotides 679-882, GenBank NM 006139.3); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0134] NKG2D-28(H)Z CAR (2.sup.nd generation) is produced by connecting: the signal sequence domain of CD8α (nucleotides 890-952, GenBank NM 001768.6); the extracellular domain of NKG2D (nucleotides 788-1192, GenBank ID: AF461811.1); CD28-derived hinge, transmembrane and intracellular signaling domains (nucleotides 562-882, GenBank NM 006139.3); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0135] NKG2D-BBOX40Z CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD8α (nucleotides 890-952, GenBank NM 001768.6); the extracellular domain ofNKG2D (nucleotides 788-1192, GenBank ID: AF461811.1); human CD8α-derived hinge and transmembrane domains (nucleotides 1292-1507, GenBank NM 001768.6); CD137-derived intracellular signaling domain (nucleotides 901-1026, GenBank NM 001561.5); CD134-derived intracellular signaling domain (nucleotides 733-840, GenBank AB590584.1); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0136] NKG2D-BBOX40LZ CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD8α (nucleotides 890-952, GenBank NM 001768.6); the extracellular domain of NKG2D (nucleotides 788-1192, GenBank ID: AF461811.1); human CD8α-derived hinge and transmembrane domains (nucleotides 1292-1507, GenBank NM 001768.6); CD137-derived intracellular signaling domain (nucleotides 901-1026, GenBank NM 001561.5); CD252-derived intracellular signaling domain (nucleotides 141-206, GenBank NM 003326.4); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0137] NKG2D-OX40BBZ CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD8α (nucleotides 890-952, GenBank NM 001768.6); the extracellular domain of NKG2D (nucleotides 788-1192, GenBank ID: AF461811.1); human CD8α-derived hinge and transmembrane domains (nucleotides 1292-1507, GenBank NM 001768.6); CD134-derived intracellular signaling domain (nucleotides 733-840, GenBank AB590584.1); CD137-derived intracellular signaling domain (nucleotides 901-1026, GenBank NM 001561.5); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0138] NKG2D-28BBZ CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD8α (nucleotides 890-952, GenBank NM 001768.6); the extracellular domain of NKG2D (nucleotides 788-1192, GenBank ID: AF461811.1); CD8α-derived hinge domain (nucleotides 1292-1435, GenBank NM 001768.6); CD28-derived transmembrane and intracellular signaling domains (nucleotides 679-882, GenBank NM 006139.3); CD137-derived intracellular signaling domain (nucleotides 901-1026, GenBank NM 001561.5); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0139] NKG2D-28OX40Z CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD8α (nucleotides 890-952, GenBank NM 001768.6); the extracellular domain of NKG2D (nucleotides 788-1192, GenBank ID: AF461811.1); CD8α-derived hinge domain (nucleotides 1292-1435, GenBank NM 001768.6); CD28-derived transmembrane and intracellular signaling domains (nucleotides 679-882, GenBank NM 006139.3); CD134-derived intracellular signaling domain (nucleotides 733-840, GenBank AB590584.1); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0140] NKG2D-28OX40LZ CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD8α (nucleotides 890-952, GenBank NM 001768.6); the extracellular domain of NKG2D (nucleotides 788-1192, GenBank ID: AF461811.1); CD8α-derived hinge domain (nucleotides 1292-1435, GenBank NM 001768.6); CD28-derived transmembrane and intracellular signaling domains (nucleotides 679-882, GenBank NM 006139.3); CD252-derived intracellular signaling domain (nucleotides 141-206, GenBank NM 003326.4); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0141] NKG2D-28(H)BBZ CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD8α (nucleotides 890-952, GenBank NM 001768.6); the extracellular domain of NKG2D (nucleotides 788-1192, GenBank ID: AF461811.1); CD28-derived hinge, transmembrane and intracellular signaling domains (nucleotides 562-882, GenBank NM 006139.3); CD137-derived intracellular signaling domain (nucleotides 901-1026, GenBank NM 001561.5); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0142] NKG2D-28(H)OX40Z CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD8α (nucleotides 890-952, GenBank NM 001768.6); the extracellular domain of NKG2D (nucleotides 788-1192, GenBank ID: AF461811.1); CD28-derived hinge, transmembrane and intracellular signaling domains (nucleotides 562-882, GenBank NM 006139.3); CD134-derived intracellular signaling domain (nucleotides 733-840, GenBank AB590584.1); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0143] NKG2D-28(H)OX40LZ CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD8α (nucleotides 890-952, GenBank NM 001768.6); the extracellular domain of NKG2D (nucleotides 788-1192, GenBank ID: AF461811.1); CD28-derived hinge, transmembrane and intracellular signaling domains (nucleotides 562-882, GenBank NM 006139.3); CD252-derived intracellular signaling domain (nucleotides 141-206, GenBank NM 003326.4); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0144] NKG2D-AAA-28(H)OX40LZ CAR (3.sup.rd generation) is produced by connecting: the signal sequence domain of CD8α (nucleotides 890-952, GenBank NM 001768.6); the extracellular domain of NKG2D (nucleotides 788-1192, GenBank ID: AF461811.1); AAA (Triple alanine); CD28-derived hinge, transmembrane and intracellular signaling domains (nucleotides 562-882, GenBank NM 006139.3); CD252-derived intracellular signaling domain (nucleotides 141-206, GenBank NM 003326.4); CD3ζ-derived intracellular signaling domain (nucleotides 299-634, GenBank NM 000734.3); and stop codon TGA.
[0145] The sequence listings of the domains used for the chimeric antigen receptors (CARs) and a method for preparation thereof according to the embodiments of the present invention are summarized in Table 4 below.
TABLE-US-00004 TABLE 4 Sequence No. Name of sequence Details of sequence 56 CD8α nucleotide Signal sequence domain of CD8α (890-952 nucleotides, GenBank NM 001768.6) 57 CD8α nucleotide codon Codon optimized sequence of SEQ ID NO. 56 optimization 58 CD8α amino acid Amino acid sequence corresponding to SEQ ID NOs. 56 and 57 59 NKG2D nucleotide Extracellular domain of NKG2D (788-1192 nucleotides, GenBank ID: AF 461811.1) 60 NKG2D nucleotide codon Codon optimized sequence of SEQ ID NO. 59 optimization 61 NKG2D amino acid Amino acid sequence corresponding to SEQ ID NOs. 59 and 60 62 NKG2D-Z nucleotide Codon optimized nucleotide sequence of NKG2D-Z CAR 63 NKG2D-Z amino acid Amino acid sequence corresponding to SEQ ID NO. 62 64 NKG2D-BBZ nucleotide Codon optimized nucleotide sequence of NKG2D-BBZ CAR 65 NKG2D-BBZ amino acid Amino acid sequence corresponding to SEQ ID NO. 64 66 NKG2D-OX40Z nucleotide Codon optimized nucleotide sequence of NKG2D-OX40Z CAR 67 NKG2D-OX40Z amino acid Amino acid sequence corresponding to SEQ ID NO. 66 68 NKG2D-ZOX40L nucleotide Codon optimized nucleotide sequence of NKG2D-ZOX40L CAR 69 NKG2D-ZOX40L amino acid Amino acid sequence corresponding to SEQ ID NO. 68 70 NKG2D-28Z nucleotide Codon optimized nucleotide sequence of NKG2D-28Z CAR 71 NKG2D-28Z amino acid Amino acid sequence corresponding to SEQ ID NO. 70 72 NKG2D-28(H)Z nucleotide Codon optimized nucleotide sequence of NKG2D-28(H)Z CAR 73 NKG2D-28(H)Z amino acid Amino acid sequence corresponding to SEQ ID NO. 72 74 NKG2D-BBOX40Z nucleotide Codon optimized nucleotide sequence of NKG2D-BBOX40Z CAR 75 NKG2D-BBOX40Z amino acid Amino acid sequence corresponding to SEQ ID NO. 74 76 NKG2D-BBOX40LZ Codon optimized nucleotide sequence of NKG2D- nucleotide BBOX40LZ CAR 77 NKG2D-BBOX40LZ amino Amino acid sequence corresponding to SEQ ID NO. 76 acid 78 NKG2D-OX40BBZ nucleotide Codon optimized nucleotide sequence of NKG2D-OX40BBZ CAR 79 NKG2D-OX40BBZ amino acid Amino acid sequence corresponding to SEQ ID NO. 78 80 NKG2D-28BBZ nucleotide Codon optimized nucleotide sequence of NKG2D-28BBZ CAR 81 NKG2D-28BBZ amino acid Amino acid sequence corresponding to SEQ ID NO. 80 82 NKG2D-280X40Z nucleotide Codon optimized nucleotide sequence of NKG2D-28OX40Z CAR 83 NKG2D-280X40Z amino acid Amino acid sequence corresponding to SEQ ID NO. 82 84 NKG2D-280X40LZ nucleotide Codon optimized nucleotide sequence of NKG2D-28OX40LZ CAR 85 NKG2D-280X40LZ amino Amino acid sequence corresponding to SEQ ID NO. 84 acid 86 NKG2D-28(H)BBZ nucleotide Codon optimized nucleotide sequence of NKG2D-28(H)BBZ CAR 87 NKG2D-28(H)BBZ amino acid Amino acid sequence corresponding to SEQ ID NO. 86 88 NKG2D-28(H)OX40Z Codon optimized nucleotide sequence of NKG2D- nucleotide 28(H)OX40Z CAR 89 NKG2D-28(H)OX40Z amino Amino acid sequence corresponding to SEQ ID NO. 88 acid 90 NKG2D-28(H)OX40LZ Codon optimized nucleotide sequence of NKG2D- nucleotide 28(H)OX40LZ CAR 91 NKG2D-28(H)OX40LZ amino Amino acid sequence corresponding to SEQ ID NO. 90 acid 92 NKG2D-AAA-28(H)OX40LZ Codon optimized nucleotide sequence of NKG2D-AAA- Nucleotide 28(H)OX40LZ CAR 93 NKG2D-AAA-28(H)OX40LZ Amino acid sequence corresponding to SEQ ID NO. 92 amino acid
Virus Production and Gene Transfer
[0146] In order to prepare VSVG-pseudotyped lentivirus, 293T cells cultured in a DMEM medium were co-transfected with various types of vectors such as PCDH1-MSCV-CD16-construct-EF1-copGFP vector, EF1a-NKG2D-construct vector, PCDH1-MSCV-EF1-copGFP control vector, or EF1a-GFP control vector (for production of Mock infection virus using empty vector) together with HIV-based pPACKH1 lentivirus Package Kit (System Biosciences). For this purpose, Lipofectamine 2000 reagent (Invitrogen, Carlsbad, Calif.) was used. Various types of CD16V constructs are as follows; CD16V-Z CAR, CD16V-BBZ CAR, CD16V-OX40Z CAR, CD16V-OX40LZ CAR, CD16V-ZOX40L, CD16V-28Z CAR, CD16V-28(H)Z CAR, CD16V-BBOX40Z CAR, CD16V-BBOX40LZ CAR, CD16V-OX40BBZ CAR, CD16V-28BBZ CAR, CD16V-28OX40Z CAR, CD16V-28OX40LZ CAR, CD16V-28(H)BBZ CAR, CD16V-28(H)OX40Z CAR, CD16V-28(H)OX40LZ CAR. Further, various types of NKG2D constructs are as follows; NKG2D-Z CAR, NKG2D-BBZ CAR, NKG2D-OX40Z CAR, NKG2D-ZOX40L CAR, NKG2D-28Z CAR, NKG2D-28(H)Z CAR, NKG2D-BBOX40Z CAR, NKG2D-BBOX40LZ CAR, NKG2D-OX40BBZ CAR, NKG2D-28BBZ CAR, NKG2D-28OX40Z CAR, NKG2D-28OX40LZ CAR, NKG2D-28(H)BBZ CAR, NKG2D-28(H)OX40Z CAR, NKG2D-28(H)OX40LZ CAR, NKG2D-AAA-28(H)OX40LZ. Each lentivirus was prepared by transfection of 80% dense HEK293T cells in a flask with: various types of CD16V construct expression vectors, various types of NKG2D construct expression vectors or a control plasmid together with pPACKH1 lentivirus packaging plasmids. After 6 hours, the medium was replaced by a DMEM medium containing 10% FBS. The conditioned medium containing lentivirus was collected after 48 hours of transfection, followed by filtering with a 0.45 μm filter unit (Milliopore, Billerica, Mass., USA) in order to remove cell debris. A viral supernatant containing the virus was concentrated about 50 times by centrifugation at 3000 rpm and 4° C. for 20 minutes using Amicon Filter (Millipore). The concentrated virus was stored at −80° C.
[0147] For the lentiviral infection, NK92MI cells in an exponential growth phase was adjusted to a concentration of 1×106 cells/ml using Cellgro (Cellgenix) including 1% human plasma, and then a lentiviral supernatant in 50 to 100 MOI was added in the presence of 8 μg/ml polybrene, followed by centrifugation at 1800 g for 90 minutes. After centrifugation, the cells were left in a humidified incubator at 37° C. and 5% CO2 conditions for 48 hours. Thereafter, the cells were washed twice with RPMI-1640, and then left in RPMI-1640 including 10% FBS for future use. Control cells were transduced with a vector only.
Detection of Expression of Receptor Including CD16V or NKG2D
[0148] CD16V CAR-transduced NK92MI cells, NKG2D CAR- transduced NK92MI cells, the control vector-transduced NK92MI (NK92MI-Mock) or NK-92MI parent cells were washed twice with FACS buffer, and the washed cells were stained using 7-AAD (Beckman coulter), anti-CD3, anti-CD56 and anti-CD16 (BD Biosciences) mAbs. An expression ratio and a mean fluorescence intensity (MFI) of the stained cells were measured using a BD LSRFortessa.
[0149] The transduction efficiency using the NKG2D construct was determined by flow cytometric analysis of cells expressing NKG2D among CD3-CD56+ cells. First, NK92MI cells were gated in regard to singlet, and then gated in regard to 7AAD- and CD3-CD56+. The transformation efficiency using the CD16 constructs was determined by flow cytometric analysis of cells expressing GFP and CD16 among CD3-CD56+ cells.
Calcein Releasing Cytotoxicity Assay
[0150] Target cells were labeled at 37° C. for 1 hour with 30 μM calcein-acetoxymethyl ester (Calcein-AM; Molecular probes). After washing, the labeled target cells were dispensed to 1×10.sup.4 cells per well in 96-well plates. NK92MI cells were harvested, washed, and then were added at different E/T (effector-to-target) ratios under conditions with or without rituximab at various concentrations. As a control group independent of the rituximab, an anti-human antibody (Sigma aldrich) was used. After 2 hours, the plates were centrifuged at 2000 rpm for 3 minutes, and a supernatant of 100 μL was collected and subjected to measurement of calcein release using a fluorescence microplate reader (Victor3, PerkinElmer) at an excitation wavelength of 485 nm and an emission wavelength of 535 nm. Specific calcein release amount was calculated by the following equation: percent specific lysis=(test release−spontaneous release)×100/(maximal release−spontaneous release). For maximal lysis, a 1% Triton X-100 was used.
Example 2: Assessment of Cytotoxicity of NK92MI Cells Expressing OX40 Ligand (CD252)-Containing Chimeric Antigen Receptor (CAR) Against CD20-Positive Lymphoma Cells
Transduction and Expression of Chimeric Antigen Receptor Containing CD16V Associated with the Co-Stimulating Motif
[0151] V158 variant (polymorphism) of FCRG3A (CD16) is a high affinity immunoglobulin Fc receptor and is considered to exhibit good effects in antibody treatment. The present inventors have prepared the V158 variant of FCRG3A (CD16) and combined the prepared variant with: the hinge and transmembrane domains of CD8α; a T cell stimulatory molecule, that is, CD3ζ; and intracellular domains of different costimulatory molecules such as CD28, 4-1BB, OX-40 and OX-40 ligand in various combinations thereof (Table 1). The prepared CD16V-containing chimeric antigen receptors (e.g., CD16V-Z CAR (1.sup.st generation), CD16V-28Z CAR (2.sup.nd generation), CD16V-BBZ CAR (2.sup.nd generation), CD16V-OX40Z CAR (2.sup.nd generation) or CD16V-28OX40LZ CAR (3.sup.rd generation)) were expressed in NK92MI cells by a lentiviral vector including a MSCV promoter. We confirmed surface expression of each CAR on NK92MI cells by detection of the human CD16, using a monoclonal mouse anti-human antibody. By repetitive experiments involving flow cytometric analysis, it was demonstrated that CARs were transduced with efficiency more than 90% in NK92MI cells (
Increase of Tumor Killing Effect of NK92MI Cells Expressing CD16V Receptor Combined with CD252 (OX40 Ligand) Against CD20-Positive Lymphoma
[0152] In order to determine whether genetic modification according to the invention induces an increase in cancer cell death, cytotoxicity of NK92MI cells transduced with an empty vector and NK92MI cells expressing a CD16-containing receptor on CD20-positive lymphoma cells (Ramos cells) was evaluated by calcein-AM release assay.
[0153] Before test for lymphoma cells, K562, a human erythroleukemic cell line, was used as a standard control to assess intrinsic cell killing ability (i.e., cytotoxicity) of the transduced NK92MI cells. By transduction using lentivirus having multiple of infection (MOI) of 50 or more, each of CARs according to the present invention (CD16V-Z CAR (1.sup.st generation), CD16V-28Z CAR (2.sup.nd generation), CD16V-BBZ CAR (2.sup.nd generation), CD16V-OX40Z CAR (2.sup.nd generation) or CD16V-28OX40LZ CAR (3.sup.rd generation)) was expressed at a high level in 90% or more NK92MI cells (
[0154] It was demonstrated that cytotoxicity of NK92MI cells expressing CARs according to the invention on K562 was similar to cytotoxicity of a control group (Mock) transduced with an empty vector. This means that the intrinsic cytotoxicity of NK92MI cells on a target was not increased by side effects due to the genetic modification itself (
[0155] In order to assess how diverse co-stimulatory molecules affect in vitro on antigen-specific antitumor activity of NK92MI cells expressing CD16V-containing receptor, transduced NK92MI cells and cancer cells (B-cell lymphoma cell line, that is, Ramos) were subjected to co-incubation, followed by assessment of lysis of the cancer cells according to calcein-AM release assay (
[0156] As shown in
[0157] CD16V-Z CAR (first generation), which was previously shown to enhance cytotoxicity in various CAR applications, served as positive control. In order to increase cytotoxicity of the CD16V-containing receptor, the present inventors have introduced CD28, CD134 (OX40), CD137 (4-1BB) or CD252 (OX40 ligand) into CD16V-Z-CAR. In 2 hour in vitro cytotoxicity assays, NK-92MI cells expressing CD16V-Z CAR (1.sup.st generation), CD16V-28Z CAR (2.sup.nd generation), CD16V-BBZ CAR (2.sup.nd generation), CD16V-OX40Z CAR (2.sup.nd generation) or CD16V-28OX40LZ CAR (3.sup.rd generation) exhibited high cytotoxicity in the presence of rituximab at effector cells to target cells ratio of 5:1 and 2.5:1. Among them, in particular, 3.sup.rd generation CAR including OX40 ligand, that is, CD16V-28OX40LZ CAR exhibited the highest cytotoxicity, compared to the other CARs (
[0158] In order to investigate whether 2.sup.nd generation CAR containing OX40 ligand can enhance anticancer activity of NK92MI cells, CD16V-OX40LZ CAR was prepared and subjected to evaluation of cytotoxicity. When NK92MI cells were transduced with CD16-OX40LZ using a lentiviral vector, CD16V-OX40LZ CAR was not expressed (
Assessment of Efficacy of CD16V-BBOX40LZ CAR
[0159] By introducing OX40 ligand into CD137 (41BB) signaling domain-based CAR, NK92MI cells were subjected to assessment of expression and cytotoxicity. Both of CD16V-BBZ CAR (2.sup.nd generation) and CD16V-BBOX40LZ CAR (3.sup.rd generation) were expressed at high levels in NK92MI cells (
Comparison of Efficacies Between CD16V-28OX40LZ CAR and Other CARs
[0160] Next, the present inventors have compared the cytotoxicity of NK92MI cells expressing CD16V-28OX40LZ CAR and the cytotoxicity of NK92MI cells expressing 3.sup.rd generation CAR that has other intracellular signaling domains. The 3.sup.rd generation CARs used in the present experiment (CD16V-28OX40LZ CAR, CD16V-28OX40Z CAR and CD16V-28BBZ CAR) were all proven to be expressed at high levels in NK92MI cells (
[0161] After comparing NK cell activating efficacies of various 3.sup.rd generation CARs (that is, 3.sup.rd generation chimeric antigen receptors) according to the present invention, results thereof are summarized in
Assessment of Efficacy of 3.SUP.rd .Generation CAR Including OX40 Ligand having CD28 at Hinge
[0162] In order for the CAR expressing NK cells to recognize a cancer cell antigen in an optimized condition, not only cancer cell antigen-recognizing receptor itself, but also hinge sequence and composition between an antigen-specific receptor and a cell membrane are also important. The hinge sequence and composition may need to be designed differently depending on target molecules.
[0163] The CARs used in the experiments described above use the fragment of CD8α as spacer domains (‘hinge’). As compared to this, variation of cytotoxicity of CARs when the fragment of CD28 is used at the hinge, was assessed and results thereof are summarized in
[0164] As shown in
[0165] The experimental results described above demonstrate that, when a novel CAR particularly including OX40 ligand as an intracellular signaling domain discovered by the present inventors is expressed in natural killer cells, excellent antitumor effects may be attained.
Example 3: Assessment of Cytotoxicity of NK92MI Cells Expressing OX40 Ligand (CD252)-Containing NKG2D Chimeric Antigen Receptor (NKG2D-CAR) on Human Breast Cancer Cells and Lung Cancer Cells
Transduction and Expression of a Chimeric Antigen Receptor Including NKG2D Associated with Co-Stimulatory Motif
[0166] The present inventors synthesized a human NKG2D gene and combined the same with diverse combinations of: hinge and transmembrane domains of CD8α; and intracellular domains of T-cell stimulatory molecules CD3ζ and cofactors including CD28, 4-1BB, OX-40 and OX-40 ligand to significantly enhance activity of T or NK cells (Table 3). Such NKG2D CAR constructs were expressed in NK92MI cells using a lentiviral vector. The present inventors have identified surface expression of each NKG2D CAR in NK92MI cells by means of detection of human NKG2D using a monoclonal mouse anti-human antibody. By repetitive experiments involving flow cytometric analysis, it was demonstrated that CARs were transduced with 70% or more efficiency in NK92MI cells.
Increase of Tumor Killing Effect of NK92MI Cells Expressing NKG2D Receptor, Which Contains Various Co-Stimulatory Signaling Domains, Against MCF7 Breast Cancer Cell Line
[0167] In order to investigate variation in killing activity due to genetic modification, cytotoxicity of NK-92MI cells, which express NKG2D CAR, on MCF7 breast cancer cells was compared by calcein-AM release assay.
[0168] In order to assess in vitro effects of various co-stimulatory signaling domains on antigen-specific antitumor functions of NK-92MI cells expressing NKG2D CAR, transduced NK-92MI cells and cancer cells were co-cultured, followed by measuring lysis of tumor cells through calcein-AM release. According to previous studies, it was known that adding the co-stimulatory signaling domains to the chimeric receptor exhibits increased cytotoxicity of T and NK lymphocytes. In order to increase the cytotoxicity of NKG2D CAR, the present inventors have introduced signaling domains of the most well-known three cofactors, that is, CD28, CD134 (OX-40) and CD137 (4-1BB) into the NKG2D CAR. The NK92MI cells containing the introduced NKG2D-Z CAR (1.sup.st generation), NKG2D-28Z CAR, NKG2D-BBZ CAR, NKG2D-OX40Z CAR (2.sup.nd generation) showed efficient expression of NKG2D (
Increase of Tumor Killing Effect of NK92MI Cells Expressing NKG2D Receptor, Which Contains CD28 Intracellular Domain, Against MCF7 Breast Cancer Cell Line
[0169] 3.sup.rd generation CAR is known to increase antitumor activity. In physiological T cell response, the optimal lymphocyte activation needs one or more cofactor receptors combined with a co-stimulatory molecule such as CD28. Among the cofactor receptors, the most important receptors are CD137 (4-1BB) and OX40 (CD134) which are members of tumor necrosis factor (TNFR).
[0170] In order to investigate effects of different cofactors in NK-92MI cells expressing NKG2D CAR (3.sup.rd generation), the present inventors have produced NKG2D-28OX40Z CAR (3.sup.rd generation) and NKG2D-28BBZ CAR (3.sup.rd generation). The NKG2D CAR (3.sup.rd generation) constructs were expressed in NK92MI cells using a lentiviral vector. The transduced NK92MI cells efficiently expressed various NKG2D receptors containing 3.sup.rd generation CAR (
Comparison of NKG2D-AAA-28(H)OX40LZ CAR (3.SUP.rd .Generation) and Other Receptors
[0171] In order to assess CD252 (OX40 ligand) co-stimulatory signaling domain effects, the signaling domain of the OX40 ligand was fused to the backbone of NKG2D-28Z CAR (2.sup.nd generation), so as to build NKG2D-28(H)OX40LZ CAR (3.sup.rd generation). In the tumor killing assay, tumor specific cytotoxicity to MCF7 cells, which was induced by NKG2D-28(H)OX40LZ CAR (3.sup.rd generation), is greatly enhanced compared to NKG2D-Z CAR (1.sup.st generation), however, is substantially similar to NKG2D-28Z CAR (2.sup.nd generation) (
[0172] For optimal CAR T-cell recognition, it was determined that, not only tumor antigen recognition receptor itself, but also hinge and linker sequences between the antigen-specific receptor and the cell membrane are also important. In the present experiment, additional effects of the spacer to the function of NKG2D-28(H)OX40LZ CAR (3.sup.rd generation) were analyzed. The present inventors have introduced an AAA (triple alanine) linker between the NKG2D extracellular domain and CD28 hinge. NKG2D-AAA-28(H)OX40LZ CAR (3.sup.rd generation) containing AAA linker introduced therein was expressed in NK92MI cells using a lentiviral vector (
Increase of Tumor Killing Effect of NK92MI Cells Expressing NKG2D-AAA-28(H)OX40LZ CAR (3.SUP.rd .Generation) Against the Lung Cancer Cell Line
[0173] In order to assess whether NK92MI cells transduced with NKG2D-AAA-28(H)OX40LZ CAR (3.sup.rd generation) can recognize NKG2D ligand in the lung cancer cells, NKG2D ligand-positive tumor cells (H1299 and H1944) were used as a target of NK92MI cells including NKG2D-AAA-28(H)OX40L CAR (3.sup.rd generation). The transduced NK92MI cells efficiently expressed NKG2D-Z CAR (1.sup.st generation) or NKG2D-AAA-28(H)OX40L CAR (3.sup.rd generation) (