WO2017176007A1 - 변형항체를 포함하는 항체-약물 접합체 - Google Patents
변형항체를 포함하는 항체-약물 접합체 Download PDFInfo
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- WO2017176007A1 WO2017176007A1 PCT/KR2017/003508 KR2017003508W WO2017176007A1 WO 2017176007 A1 WO2017176007 A1 WO 2017176007A1 KR 2017003508 W KR2017003508 W KR 2017003508W WO 2017176007 A1 WO2017176007 A1 WO 2017176007A1
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- A61K31/33—Heterocyclic compounds
- A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
- A61K31/337—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having four-membered rings, e.g. taxol
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- A—HUMAN NECESSITIES
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- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/535—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines
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- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/535—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines
- A61K31/5365—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines ortho- or peri-condensed with heterocyclic ring systems
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- A—HUMAN NECESSITIES
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- A—HUMAN NECESSITIES
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- A—HUMAN NECESSITIES
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
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- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
Definitions
- the present invention relates to an antibody-drug conjugate in which a modified antibody comprising a motif of a specific structure at the terminal of the antibody is bound to a drug through a linker, and specifically to a drug linked to the heavy or light chain C-terminus.
- a modified Antibody-Drug Conjugate (mADC) conjugate comprising a modified antibody having a significantly increased conjugation yield and a composition comprising the same.
- Drugs used for chemotherapy often show toxicity, especially bone marrow, mucosa, and neurotoxicity. Therefore, there is a need for the development of an anticancer agent that is safer while showing strong anticancer activity and specificity to cancer cells. Anti-cancer drugs that act only on cancer cells and reduce side effects are being developed in various ways.
- therapies using antibodies that are specifically expressed in specific diseases that is, antibodies that specifically bind to antigens
- antibodies that specifically bind to antigens are currently being actively studied among biopharmaceuticals.
- methods for diagnosing and treating tumors using antibodies, such as anti-cancer antibodies, which identify tumor-associated antigens specifically expressed on the surface of cancer cells, bind to them, and inhibit cell growth or induce death are now widely used. Is also a very bright technology field.
- anticancer antibodies have very high target specificities, but the killing effect of cancer cells is often lower than that of conventional cytotoxic drugs (anticancer drugs), so they may be used in combination with cytotoxic drugs and other cell proliferation inhibitors. It is often used as a combination therapy.
- Anticancer drugs show significantly higher cytotoxicity than anticancer antibodies, but have very high side effects compared to antibody therapeutics because of their low target specificity to cancer cells. Therefore, the combination therapy of anticancer antibody and anticancer drug shows a higher therapeutic effect than when each drug is administered separately, but has the fundamental limitation that side effects of anticancer drug are always accompanied.
- anticancer drugs due to its very high cytotoxicity, among the anticancer drugs, drugs that can be used alone as anticancer drugs are limited to relatively low toxicity Taxol or cisplatin-based drugs. Most anticancer drugs with high cytotoxicity are virtually impossible to prescribe as single drugs because of their very high cytotoxicity.
- an anticancer drug that cannot be used as a prescription alone to an antibody having a very high target specificity for cancer cells, the anticancer drug can be delivered only to the target cancer cells without the side effects of normal cells. Therefore, antibody-drug conjugates have been in the spotlight as a method for improving the therapeutic efficacy of anti-cancer drugs that cannot be used conventionally.
- Antibody-drug conjugates currently on the market include Adcetris®, a treatment for Hodgkin's lymphoma, and Kadcyla®, a treatment for metastatic breast cancer. These antibody-drug conjugates are conjugated to tubulin inhibitors that inhibit the growth and division of cancer by conjugating to the tubule, an intracellular microtubule involved in cell division, thereby inhibiting cell division. Has These antibody-drug conjugates bind the drug to the lysine originally possessed by the antibody (cadcyla), or to the cysteine group that reduced the disulfide group linking the heavy chain-heavy chain or heavy-light chain that maintains the structural stability of the antibody. (Adsetless).
- the anticancer drug conjugation method used in the first-generation antibody-drug conjugate does not control the number of conjugated drugs per antibody, and even in antibody-drug conjugates having the same number of drug conjugates, the positional conjugations of the drugs are different from each other. isomer) is generated.
- the number of conjugates of drugs per antibody affects not only the cytotoxicity of antibody-drug conjugates but also the stability of antibody-drug conjugates and the possibility of aggregate formation.In general, the more conjugated drugs, the less stable the antibody itself and the formation of aggregates. The chances are high.
- the number of conjugated drugs per antibody has an average value.
- the number of drugs conjugated to the antibody may range from 1 to 8, and on average 3.5 drug conjugates.
- the properties of the antibody-drug conjugate may vary depending on the location of the drug conjugate.
- the drug is conjugated near the Fab or near the hinge of the Fc, there is a possibility that the stability of the antibody or antigen-antibody reactivity may be impaired due to a difference in the binding force between the antigen and the Fc ⁇ or FcRn receptor.
- the number of conjugated drugs per antibody increases, the number of positional isomers with different conjugated positions of the drug increases proportionally, and this result may have a great influence on maintaining the consistent characteristics of the antibody-drug conjugate according to the production batch. .
- Conjugation using non-natural amino acid is a natural amino acid that synthesizes tRNA that can introduce artificial amino acids into proteins through mutants of tRNA synthase. It is based on a technique that can introduce side-chains into proteins (Wang et al., Proc. Natl. Acad. Sci. USA, 2003, 100, 56-61). This allows the drug to be conjugated at a desired position in such a way as to perform site-specific conjugation to the residues of the artificial amino acids introduced (skeman et. Al, Bioconjugate Chem. 2014, 25, 351-361).
- these methods require high-level tasks that require high levels of genetic engineering to regulate the translation pathway.
- Antibodies act as carriers for the specific delivery of anticancer drugs to cancer cells, and the drug is a basic concept of an antibody-drug conjugate that needs to be stably conjugated to an antibody until it is delivered to cancer cells.
- the necessity of producing antibody-drug conjugates using the same complex and time-consuming and expensive conjugation method is questionable.
- the location-specific conjugation in the production of antibody-drug conjugates, and the economic conjugation method, which is excellent in economical efficiency, overcome the limitations of the existing method of conjugation of the first generation antibody-drug conjugates as well as the newly proposed location-specific conjugation method. It can be a great alternative.
- Antibody-drug conjugates show superior in vitro and in vivo efficacy over existing antibody pharmaceuticals.
- some clinical results for using antibody-drug conjugates as primary therapeutics failed to show significant clinical utility differences compared to the combination therapy of monoclonal antibody and chemosynthetic drugs (http: // www.roche.com/media/store/releases/med-cor-2014-12-19.htm).
- These results can be a significant constraint on the economic utility of antibody-drug conjugates, given that antibody-drug conjugates require significantly higher therapeutic costs than synthetic drugs as well as monoclonal antibody therapeutics.
- the above-mentioned location-specific conjugation methods have serious problems in providing economic utility that can be used as a primary therapeutic agent.
- the present invention provides a antibody (hereinafter modified antibody) of the type having a specific binding motif to the parent antibody having a drug binding site.
- modified antibodies modify modified antibodies comprising existing metal ion binding peptide motifs to provide modified antibodies with higher drug conjugate yields while maintaining the properties of site specific conjugation.
- the present invention also provides an antibody-drug conjugate using the modified antibody and a method for producing an anticancer drug.
- the present invention provides an antibody-drug conjugate wherein a modified antibody comprising a motif represented by the following structural formula (1) at the terminal of the antibody is bound to the drug via a linker:
- M motif1 or M motif2 each independently include any one of a sequence consisting of ACGHA (SEQ ID NO: 1), AHGCA (SEQ ID NO: 2), AXGHA (SEQ ID NO: 3), and AHGXA (SEQ ID NO: 4), wherein X in SEQ ID NO: 3 or 4 includes amino acid residues other than cysteine,
- X a And X b is a peptide consisting of 0 to 20 amino acid residues each independently selected from the group consisting of A (alanine), S (serine), G (glycine),
- n1 and n2 are integers of 1-10, respectively.
- the present invention also provides a composition for preventing or treating cancer comprising the antibody-drug conjugate.
- FIG. 1 Samples conjugated to MC-vc-PAB-MMAE with FM2, FM2b (lot no: 4390f), FM2b (lot no: 5698f), FM2a, FM2L, and FM1 antibody variants of the antibody targeting the Folate receptor SDS-PAGE.
- the drug is conjugated to a motif containing a cysteine residue introduced into the heavy chain of the antibody, and appears on the SDS-PAGE as two bands in the heavy chain near 50 kDa.
- FIG. 1 SDS-PAGE of a sample conjugated with the antibody variants of FM2, FM2b, FM2a, FM2L, FM1 targeting the Folate receptor to br-vc-PAB-MMAE, a drug-linker conjugate linked to MMAE via bromoacetamide .
- the drug is conjugated to a motif containing a cysteine residue introduced into the heavy chain of the antibody, and appears on the SDS-PAGE as two bands in the heavy chain near 50 kDa.
- FIG. 3 Cell growth inhibition test using KB-cells overexpressed Folate receptor.
- Parent antibody Fwt and modified antibody-drug conjugate FM2-D2 modified antibody-drug conjugate with DAR 2 in modified antibody-drug conjugate of modified antibody FM2 and MMAE
- FM2b-D2 or FM2b-S-D2
- FM2-D2 and FM2b-D2 show almost the same intracellular activity.
- FIG. 4 Cell growth inhibition test using KB-cells overexpressed Folate receptor. Cell growth inhibition of FM2b-S-D2, FM2b-F-D2, and FM2b-Y-D2. FM2b-S-D2, FM2b-F-D2, and FM2b-Y-D2 show almost the same intracellular activity.
- the antibody-drug conjugate must be stably bound to the antibody until the anti-cancer drug is delivered to the target cancer cell.
- Anticancer drugs delivered to target cancer cells must be released from the antibody to induce the death of cancer cells.
- the anti-cancer drug must be stably deficient in the antibody by using a linker and have a structure of a drug-linker having sufficient cytotoxicity to induce cancer cell death when released from cancer cells.
- the drug should show the anti-potency of the antibody-drug conjugate and its uniformity in the manufacturing process by site-specific conjugation to the antibody.
- the modified antibody comprising a peptide motif containing a metal ion binding motif is improved, that is, the ratio of conjugation of the drug conjugated to the antibody according to the arrangement and primary structure of the metal ion binding motif introduced into the terminal of the parent antibody. We tried to prove that this could increase significantly.
- the present invention relates to an antibody-drug conjugate wherein a modified antibody comprising a motif represented by the following structural formula (1) at the terminal of the antibody is bound to a drug via a linker.
- M motif1 or M motif2 each independently include any one of a sequence consisting of ACGHA (SEQ ID NO: 1), AHGCA (SEQ ID NO: 2), AXGHA (SEQ ID NO: 3), and AHGXA (SEQ ID NO: 4), wherein X in SEQ ID NO: 3 or 4 includes amino acid residues other than cysteine,
- X a and X b are each independently a peptide consisting of 0 to 20 amino acid residues selected from the group consisting of A (alanine), S (serine) and G (glycine),
- n1 and n2 are integers of 1-10, respectively.
- the motif represented by Structural Formula (1) is a peptide including a CGH motif which is a metal ion binding motif, and the CGH motif has the structure of Formula 1 below.
- M means a metal ion
- R is an amino acid residue except cysteine, particularly alanine is preferable.
- M motif1 or M motif2 includes ACGHA (SEQ ID NO: 1) in which alanine is located at the C-terminal and N-terminal, respectively, or AXGHA (SEQ ID NO: 3) in which a cysteine is substituted with an amino acid residue other than cysteine. do. N-terminus and C-terminus in ACGHA (SEQ ID NO: 1) or AXGHA (SEQ ID NO: 3) for M motif1 or M motif2 in the motif according to the present invention, even if the N-terminus and C-terminus are still changed. Also included are AHGCA (SEQ ID NO: 2) or AHGXA (SEQ ID NO: 4), which have been terminated.
- M motif1 or M motif2 may each include the same sequence and may include different sequences from each other.
- M motif 1 or M motif 2 corresponds to AXGHA or AHGXA, wherein X is serine (S), alanine (A), threonine (T), tyrosine (Y), aspartic acid It may be an amino acid residue selected from the group consisting of (D), lysine (K) and phenylalanine (F).
- the M motif2 includes AXGHA (SEQ ID NO: 3), and X may show higher drug conjugation ability than the case of including ACGHA when amino acid residues other than cysteine are included.
- the M motif2 is AXGHA, where X is, for the amino acid residue Examples of the non-cysteine, serine (S), alanine (A), threonine (T), tyrosine (Y), aspartic acid (D), lysine (K) and It may be an amino acid residue selected from the group consisting of phenylalanine (F).
- X a is an amino acid residue present at the 5 'end of the motif M motif1 , which may be a peptide positioned to connect with the terminal of the antibody, and may be composed of A (alanine), S (serine), and G (glycine).
- the amino acid residue selected from the group is a peptide consisting of 0-20.
- the motif does not include X a and may be in a form in which M motif1 of the motif directly bonds to the antibody.
- X a May be one or more, two or more, three or more, four or more, five or more amino acid residues of X a , for example, 2-20, 2-18, 2-16, 2-14 , 2-12, 2-10, 2-8, 2-6, 2, 3, 4, 5, 6, 7, 8, 9, 10.
- X b is a linker for linking M motif1 and M motif2 and is a peptide consisting of 0 to 20 amino acid residues selected from the group consisting of A (alanine), S (serine) and G (glycine). If the amino acid residue of X b is 0, the motif does not include X b and may be in a form in which M motif 1 and M motif 2 are directly connected.
- X b of the amino acid residues in one or more, two or more, three or more, four or more, may be more than five, e.g., 2-20, 2-18, 2-16, 2-14 , 2-12, 2-10, 2-8, 2-6, 2, 3, 4, 5, 6, 7, 8, 9, 10.
- n1 and n2 represent the number of repetitions of M motif1 and M motif2 , respectively, and are an integer of 1 to 10.
- N1 and n2 may each be 1, wherein M motif1 And M motif2 to ACGHA (SEQ ID NO: 1), AHGCA (SEQ ID NO: 2), AXGHA (SEQ ID NO: 3) and AHGXA (SEQ ID NO: 4) any of the sequences consisting of comprises a linker for X b without a linker or X b Can be connected.
- [M motif1] n1 -X b - [M motif2] n2 structure is the absence of a linker X b ACGHAACGHA (SEQ ID NO: 5), ACGHAAHGCA (SEQ ID NO: 6), ACGHAAXGHA (SEQ ID NO: 7), ACGHAAHGXA ( SEQ ID NO: 8), AHGCAAHGCA (SEQ ID NO: 9), AHGCAACGHA (SEQ ID NO: 10), AHGCAAXGHA (SEQ ID NO: 11), AHGCAAHGXA (SEQ ID NO: 12), AXGHAAXGHA (SEQ ID NO: 13), AXGHAACGHA (SEQ ID NO: 14), AXGHAAHGCA Number 15), AXGHAAHGXA (SEQ ID NO: 16), AHGXAAHGXA (SEQ ID NO: 17), AHGXAACGHA (SEQ ID NO: 18), AHGXAAHGCA (SEQ ID NO: 19), or AHGXAAXGHA
- X b When X b is present, a peptide consisting of 1 to 20 amino acid residues at the 5 'end of the amino acid sequences may be further included.
- X may be selected from the group consisting of serine (S), alanine (A), threonine (T), tyrosine (Y), aspartic acid (D), lysine (K) and phenylalanine (F).
- the n2 structure contains a serine at position X in SEQ ID NOs 7, 8,11 to 20, including X if there is no linker of X b , for example if X is serine ACGHAASGHA (SEQ ID NO: 21), ACGHAAHGSA (SEQ ID NO: 22), AHGCAASGHA (SEQ ID NO: 23), AHGCAAHGSA (SEQ ID NO: 24), ASGHAASGHA (SEQ ID NO: 25), ASGHAACGHA (SEQ ID NO: 26), ASGHAAHGCA (SEQ ID NO: 27), ASGHAAHGSA (SEQ ID NO: 28), AHGSAAHGSA (SEQ ID NO: 29), AHGSAACGHA (SEQ ID NO: 30), AHGSAAHGCA (SEQ ID NO: 31), or AHGSAASGHA (SEQ ID NO: 32).
- n2 structure is ACGHAAAGHA (SEQ ID NO: 33), ACGHAAHGAA (SEQ ID NO: 34), AHGCAAAGHA (if X is alanine (A) when there is no linker of X b ) SEQ ID NO: 35), AHGCAAHGAA (SEQ ID NO: 36), AAGHAAAGHA (SEQ ID NO: 37), AAGHAACGHA (SEQ ID NO: 38), AAGHAAHGCA (SEQ ID NO: 39), AAGHAAHGAA (SEQ ID NO: 40), AHGAAAHGAA (SEQ ID NO: 41), AHGAAACGHA (SEQ ID NO: 41) Number 42), AHGAAAHGCA (SEQ ID NO: 43), or AHGAAAAGHA (SEQ ID NO: 44).
- n2 structure is ACGHAATGHA (SEQ ID NO: 45), ACGHAAHGTA (SEQ ID NO: 46), AHGCAATGHA (if X is a threonine (T) when there is no linker of X b ) SEQ ID NO: 47), AHGCAAHGTA (SEQ ID NO: 48), ATGHAATGHA (SEQ ID NO: 49), ATGHAACGHA (SEQ ID NO: 50), ATGHAAHGCA (SEQ ID NO: 51), ATGHAAHGTA (SEQ ID NO: 52), AHGTAAHGTA (SEQ ID NO: 53), AHGTAACGHA (SEQ ID NO: 53) Number 54), AHGTAAHGCA (SEQ ID NO: 55), or AHGTAATGHA (SEQ ID NO: 56).
- n2 structure is the absence of a linker of X b , for example, if X is tyrosine (Y), ACGHAAYGHA (SEQ ID NO: 57), ACGHAAHGYA (SEQ ID NO: 58), AHGCAAYGHA (SEQ ID NO: Number 59), AHGCAAHGYA (SEQ ID NO: 60), AYGHAAYGHA (SEQ ID NO: 61), AYGHAACGHA (SEQ ID NO: 62), AYGHAAHGCA (SEQ ID NO: 63), AYGHAAHGYA (SEQ ID NO: 64), AHGYAAHGYA (SEQ ID NO: 65), AHGYAACGHA (SEQ ID NO: 65) 66), AHGYAAHGCA (SEQ ID NO: 67), or AHGYAAYGHA (SEQ ID NO: 68).
- Y tyrosine
- ACGHAAYGHA SEQ ID NO: 57
- ACGHAAHGYA SEQ ID NO: 58
- n2 structure is the absence of a linker of X b , for example, if X is aspartic acid (D), ACGHAADGHA (SEQ ID NO: 69), ACGHAAHGDA (SEQ ID NO: 70), AHGCAADGHA ( SEQ ID NO: 71), AHGCAAHGDA (SEQ ID NO: 72), ADGHAADGHA (SEQ ID NO: 73), ADGHAACGHA (SEQ ID NO: 74), ADGHAAHGCA (SEQ ID NO: 75), ADGHAAHGDA (SEQ ID NO: 76), AHGDAAHGDA (SEQ ID NO: 77), AHGDAACGHA (SEQ ID NO: 77) Number 78), AHGDAAHGCA (SEQ ID NO: 79), or AHGDAADGHA (SEQ ID NO: 80).
- D aspartic acid
- ACGHAADGHA SEQ ID NO: 69
- ACGHAAHGDA SEQ ID NO: 70
- AHGCAADGHA SEQ ID
- [M motif1] n1 -X b - [M motif2] n2 structure is the absence of a linker of X b, for example when X is lysine (K) ACGHAAKGHA (SEQ ID NO: 81), ACGHAAHGKA (SEQ ID NO: 82), AHGCAAKGHA (SEQ ID NO: Number 83), AHGCAAHGKA (SEQ ID NO: 84), AKGHAAKGHA (SEQ ID NO: 85), AKGHAACGHA (SEQ ID NO: 86), AKGHAAHGCA (SEQ ID NO: 87), AKGHAAHGKA (SEQ ID NO: 88), AHGKAAHGKA (SEQ ID NO: 89), AHGKAACGHA (SEQ ID NO: 90), AHGKAAHGKA (SEQ ID NO: 91), or AHGKAAKGHA (SEQ ID NO: 92).
- K is lysine
- ACGHAAKGHA SEQ ID NO: 81
- [M motif1] n1 -X b - [M motif2] n2 structure is the absence of a linker X b
- X is phenylalanine (F) ACGHAAFGHA (SEQ ID NO: 93), ACGHAAHGFA (SEQ ID NO: 94), AHGCAAFGHA (SEQ ID NO: Number 95), AHGCAAHGFA (SEQ ID NO: 96), AFGHAAFGHA (SEQ ID NO: 97), AFGHAACGHA (SEQ ID NO: 98), AFGHAAHGCA (SEQ ID NO: 99), AFGHAAHGFA (SEQ ID NO: 100), AHGFAAHGFA (SEQ ID NO: 101), AHGFAACGHA (SEQ ID NO: 102), AHGFAAHGFA (SEQ ID NO: 103), or AHGFAAFGHA (SEQ ID NO: 104).
- a peptide consisting of 1 to 20 amino acid residues may be further included at the 6th position at the 5 'end in the amino acid sequences of SEQ ID NOs: 5 to 104.
- X may be selected from the group consisting of serine (S), alanine (A), threonine (T), tyrosine (Y), aspartic acid (D), lysine (K) and phenylalanine (F).
- N1 and n2 may each be two or more, for example, when n1 and n2 are 2, AC MHA (SEQ ID NO: 1), AHGCA (SEQ ID NO: 2), and AXGHA if M motif 1 and M motif 2 each include the same amino acid sequence Either one consisting of (SEQ ID NO: 3) and AHGXA (SEQ ID NO: 4) includes a sequence in which each is repeated twice, or a different sequence such as ACGHA and AHGCA, ACGHA and AXGHA, ACGHA and AHGXA, AHGCA and ACGHA , AHGCA and AXGHA, AHGCA and AHGXA, AXGHA and ACGHA, AXGHA and AHGCA, AXGHA and AHGXA, AHGXA and ACGHA, AHGXA and AHGCA, or AHGXA and AXGHA, respectively.
- AC MHA SEQ ID NO: 1
- AHGCA SEQ ID NO: 2
- AXGHA
- M motif1 and M motif2 are each any one of a sequence consisting of ACGHA (SEQ ID NO: 1), AHGCA (SEQ ID NO: 2), AXGHA (SEQ ID NO: 3), and AHGXA (SEQ ID NO: 4). It may include the same sequence corresponding to one, or may be repeated 3-10 times each including a different sequence.
- n1 and n2 may each be 1, and there may not be a linker of X b , wherein the motif according to the present invention is one or more sequences selected from the group consisting of SEQ ID NOs: 5 to 104, for example. It may include.
- the motif may bind to the heavy or light chain C-terminus of the antibody, specifically the heavy chain C-terminus, thereby providing a modified antibody and a drug conjugate comprising the same, which significantly increase the drug conjugation yield.
- the yield of the antibody-drug conjugate can be increased by increasing the yield of the drug.
- Drugs conjugated in high yield can be specifically delivered to target cancer cells by modified antibodies, thereby increasing the therapeutic effect, and lowering the production cost of the antibody-drug conjugate therapeutics due to the high yield of conjugated antibody-drug conjugates.
- the motif may be directly bonded in the form of a fusion through an amino bond with the parent antibody, or in a form in which the terminal functional group of the parent antibody and the terminal functional group in the motif are chemically bonded, or mediated to a linker connecting the terminal functional group and the drug in the motif.
- Linker-mediated forms of coupling are also possible.
- the linker may be in the form of linking a drug with a specific residue in a motif, and may have a reactive site having an electrophilic group that reacts to a nucleophilic residue (eg, cysteine) present on a motif among modified antibodies.
- the linker may comprise, for example, reactive functional groups, amino acids and self-cutting spacers that bind to the motif.
- the functional groups are i) maleimide groups, acetamide groups, or derivatives thereof, ii) aziridine groups, arylhalides, acryloyl groups, or derivatives thereof, iii) alkylation reactors, arylation reactors, pyridyl disulfides, thionitrobenzo Ikic acid, or a derivative thereof.
- the linker may specifically include, for example, i) a maleimide group or a derivative thereof-valine-citurulline-para-aniline benzoic acid (PABA); Or ii) an acetamide group or derivative thereof-valine-citurulline-paraaniline benzoic acid (PABA), but is not limited thereto.
- the binding of the moiety to the drug via the linker may be carried out using known methods such as alkylation, disulfide interchange and transthioesterification. This allows the antibody and the drug to be conjugated via the thiol group of the cysteine residue in the motif.
- the nucleophilic reactivity of the thiol of the cysteine residue to the maleimide group is present in the protein, such as other amino acid functional groups, such as amino groups of lysine residues or Because it is about 1,000 times higher than the N-terminal amino group, it can be used to specifically bind to cysteine.
- the modified antibody-drug conjugates via maleimide groups, derivatives thereof or acetamide groups or derivatives thereof, such as bromo acetamide groups, iodo acetamide groups can be seen that cysteine is bound to the drug by thioether linkage. .
- the antibody may be one or more selected from the group consisting of monoclonal antibodies, bispecific antibodies, chimeric antibodies, human antibodies and humanized antibodies. Moreover, both modified antibodies, such as a bispecific antibody, antibody fragments, etc. can be used.
- 'Antibody fragments' refer to fragments that have at least the binding function to the antigen, and are single-chain antibodies, diabodies, triabodies, tetrabodies, Fab fragments, F (ab') 2 fragments, Fd, scFv, domain antibodies, mini Body, single chain antibody (scAb), derivatives of antibody constant regions, phosphorus based on protein scaffolds and the like.
- the antibody may be selected from the group consisting of IgA, IgD, IgE, IgG and IgM.
- the antibody specifically includes cancer specific antigens, cell surface receptor proteins, cell surface proteins, transmembrane proteins, signaling proteins, cell survival regulators, cell proliferation regulators, molecules associated with tissue development or differentiation, lymphokines, cytokines. May have binding capacity and specificity for Cain, a molecule involved in cell cycle regulation, an angiogenesis related molecule, or an angiogenesis related molecule, for example, (1) BMPR1B (bone morphogenetic protein receptor-IB type, gene Bank grant number NM_001203);
- MPF MPF, MSLN, SMR, megakaryocyte enhancing factor, mesothelin, Genbank Accession No. NM — 005823
- Napi3b (NAPI-3B, NPTIIb, SLC34A2, Solute Carrier Family 34 (Sodium Phosphate), Member 2, Type II Sodium-Dependent Phosphate Transporter 3b, GenBank Accession No. NM_006424);
- Sema 5b (FLJ10372, KIAA1445, Mm.42015, SEMA5B, SEMAG, Semaphorin 5b Hlog, Sema Domain, 7 Thrombospondin Repeats (Type 1 and Similar Type 1), Transmembrane Domain (TM) And short cytoplasmic domain, (semaphorin) 5B, Genbank Accession No. AB040878);
- PSCA hlg (2700050C12Rik, C530008O16Rik, RIKEN cDNA 2700050C12, RIKEN cDNA 2700050C12 gene, Genebank Accession No. AY358628);
- ETBR endothelin type B receptor, Genbank Accession No. AY275463
- MSG783 (10) MSG783 (RNF124, hypothetical protein FLJ20315, Genebank Accession No. NM_017763);
- STEAP2 (HGNC_8639, IPCA-1, PCANAP1, STAMP1, STEAP2, STMP, Prostate Cancer Related Gene 1, Prostate Cancer Related Protein 1, Prostate 6 Transmembrane Epithelial Antigen 2, 6 Transmembrane Prostate Protein, Genebank Authorization number AF455138);
- TrpM4 (BR22450, FLJ20041, TRPM4, TRPM4B, transient receptor potential cation channel, subgroup M, member 4, Genbank Accession No. NM_017636);
- CRIPTO (CR, CR1, CRGF, CRIPTO, TDGF1, teratocarcinoma-derived growth factor, Genbank accession no. NP — 003203 or NM — 003212);
- CD21 CR2 (complementary receptor 2) or C3DR (C3d / Epstein Barr virus receptor) or Hs.73792 Genbank Accession No. M26004);
- CD79b (CD79B, CD79 ⁇ , IGb (immunoglobulin-associated beta), B29, Genbank Accession No. NM — 000626);
- FcRH2 (IFGP4, IRTA4, SPAP1A (SH2 domain containing phosphatase anchoring protein 1a), SPAP1B, SPAP1C, GenBank Accession No. NM_030764);
- ErbB receptors selected from EGFR, HER3 and HER4
- NCA Gene Accession No. M18728
- PSCA Genbank Accession No. AJ297436
- BAFF-R B cell activating factor receptor, BLyS receptor 3, BR3, NP_443177.1
- CD22 B-cell receptor CD22-B isotype, NP-001762.1
- CD79a, CD79A, CD79 ⁇ , and immunoglobulin-associated alpha which are covalently interacting with CD79a (Ig beta (CD79B) and forming complexes on the surface with IgM molecules, are signals involved in B cell differentiation Forwarded, Genbank approval number NP_001774.1);
- CXCR5 (Bucket Lymphoma Receptor 1, a G protein coupled receptor activated by CXCL13 chemokines, acts on lymphocyte migration and humoral defense, participates in HIV-2 infection, and develops AIDS, lymphoma, myeloma and leukemia Considered to be related to, Genbank approval number NP_001707.1);
- HLA-DOB beta subunit of MHC class II molecules (Ia antigen), binding to peptides and presenting in CD4 + T lymphocytes, Genbank Accession No. NP — 002111.1);
- P2X5 purine receptor P2X ligand-gate ion channel 5, an ion channel gated by extracellular ATP, may be involved in synaptic transmission and neurogenesis, the lack of which may contribute to the pathophysiology of idiopathic detrusor instability Yes, Genbank approval number NP_002552.2);
- CD72 B-cell differentiation antigen CD72, Lyb-2, Genbank Accession No. NP — 001773.1
- Lymphocyte antigen 64 (RP105), a type I membrane protein of the LY64 (leucine rich repeat (LRR) family), modulates B cell activation and apoptosis, and its loss of function is attributed to systemic lupus erythematosus patients. Associated with increased disease activity, GenBank Accession No. NP_005573.1);
- FcRH1 Fc receptor-like protein 1, a putative receptor for immunoglobulin Fc domains containing C2 Ig-like and ITAM domains, may be involved in B lymphocyte differentiation, Genbank accession number NP_443170.1) ;
- IRTA2 associated gene deregulation by immunoglobulin macrophage receptor translocation, a putative immunoreceptor capable of acting on B cell development and lymphoma development, occurs in some B cell malignancies, Genbank approval number NP_112571.1);
- TENB2 estimated transmembrane proteoglycan associated with EGF / Heregulin family of growth factors and follistatin, Genbank Accession No. AF179274);
- folate receptor a family of proteins expressed by the FoLR gene, which has high binding capacity with Folic acid and carries 5-methyltetrahydrofolate into cells
- gangliosides GD2, GD3, GM2;
- (64) may have binding capacity to one or more targets selected from the group consisting of tenascin, but is not limited thereto.
- an antibody that binds to a folate receptor comprising a heavy chain of SEQ ID NO: 115 and a light chain of SEQ ID NO: 116 was used as a parent antibody.
- a metal ion binding motif to the heavy chain terminal of the parent antibody to prepare a variety of modified antibodies according to the sequence and placement of the peptide motif, the difference in the conjugate ratio of the drug according to the modified antibody was measured.
- the modified antibody may include one or more heavy chains selected from the group consisting of SEQ ID NOs: 117 to 121.
- an antibody that specifically binds to Her2 was used as the parent antibody.
- a metal ion binding motif to the heavy chain terminal of the parent antibody to prepare a variety of modified antibodies according to the sequence and placement of the peptide motif, the difference in the conjugate ratio of the drug according to the modified antibody was measured.
- the antibody-drug conjugate according to the present invention had a similarly high drug conjugation yield when the motifs were introduced into Farletuzumab and Trastuzumab. Therefore, the motif according to the present invention can be utilized as a platform technology for binding a drug to an antibody in antibody-drug conjugate preparation regardless of the type of antibody.
- the antibody may comprise the variable region of the parent or modified antibody and CH1, CH2 and CH3 of IgG2 or IgG4.
- the VH and VL of Farletuzumab, Trastuzumab or its modified antibodies can be used and include CH1, CH2, CH3 of IgG2 or IgG4.
- the variable region of the Farletuzumab antibody may include a heavy chain variable region of SEQ ID NO: 122 and / or a light chain variable region of SEQ ID NO: 123.
- the antibody may comprise a Fab of the parent antibody or a modified antibody and an Fc of IgG2 or IgG4. Specifically, it may include a form in which the Fab portion of Farletuzumab, Trastuzumab or its modified antibody and the Fc portion of IgG2 or IgG4 are fused.
- the Fab of the Farletuzumab antibody may comprise a heavy chain variable region of SEQ ID NO: 122 and a CH1 containing sequence (SEQ ID NO: 124) and / or a light chain variable region of SEQ ID NO: 123.
- the Trastuzumab antibody may comprise a heavy chain of SEQ ID NO: 127 and / or a light chain of SEQ ID NO: 128.
- the drug combined with the modified antibody in the present invention can be used without limitation any drug that has a therapeutic effect of the disease, and particularly preferred is a drug for treating cancer having a proliferation inhibitory effect of tumor cells.
- the drug may be conjugated to the cysteine group or serine group of the motif introduced at the terminal of the modified antibody.
- Drugs that may be used in the modified antibody-drug conjugates of the present invention specifically include any compound, moiety or group that has a cytotoxic or cytostatic effect, and (i) a microtubulin inhibitor, mitosis inhibitor, topoiso Chemotherapeutic agents that can function as merase inhibitors, or DNA intercalators; (ii) protein toxins that can function enzymatically; (iii) micro RNA (miRNA), siRNA, shRNA capable of inhibiting the expression of certain oncogenes; Or (iv) radioisotopes.
- a microtubulin inhibitor mitosis inhibitor, topoiso Chemotherapeutic agents that can function as merase inhibitors, or DNA intercalators
- protein toxins that can function enzymatically
- miRNA micro RNA
- siRNA siRNA
- shRNA capable of inhibiting the expression of certain oncogenes
- radioisotopes radioisotopes.
- Such drugs include, for example, maytansinoids, orstatin, aminopterin, actinomycin, bleomycin, thalisomycin, camptocecin, N8-acetyl spermidine, 1- (2 chloroethyl) -1, 2-dimethyl sulfonyl hydrazide, esperamycin, etoposide, 6-mercaptopurine, dolastatin, tricortesene, calicheamicin, taxane, methotrexate, vincristine, vinblastine, doxorubicin, melphalan, mito Mycin A, mitomycin C, chlorambucil, duocarmycin, nucleolytic enzymes, toxins derived from bacteria or plants, cisplatin, irinotecan, paclitaxel and docetaxel, but is not limited thereto.
- the drug may react with an amine, thiol, hydroxyl, hydrazide, oxime, hydrazine, thiosemicarbazone, hydrazine carboxylate, which can react to form covalent bonds with electrophilic groups on the linker and linker reagent, And one or more nucleophilic groups selected from the group consisting of arylhydrazide groups.
- the present invention provides a therapeutic composition
- a therapeutic composition comprising the antibody-drug conjugate as an active ingredient.
- the drug of the modified antibody-drug conjugate in the composition is characterized by the use of an antibody conjugate for topical delivery of a drug that kills or inhibits tumor cells in the treatment of cancer, with the drug moiety being targeted to the antibody-antigen into the tumor and into the cell. Enable accumulation
- the present invention also provides a method of inhibiting proliferation of target cells by contacting the target cells with cancer, autoimmune, inflammatory or infectious diseases or diseases using the modified antibody-drug conjugate as an active ingredient.
- Treatable cancers in the present invention are liver cancer, stomach cancer, breast cancer, colon cancer, bone cancer, pancreatic cancer, head or neck cancer, uterine cancer, ovarian cancer, rectal cancer, esophageal cancer, small intestine cancer, anal muscle cancer, colon cancer, fallopian tube carcinoma, endometrial carcinoma,
- a modified antibody-drug conjugate may be contacted in KB cells, which are cancer cells amplified with in vitro folate receptors, to induce cell proliferation inhibition. Therefore, the inhibitory method using the modified antibody-drug conjugate of the present invention as an active ingredient has an effect of killing or reducing the rate of proliferation and inhibiting cells associated with the disease.
- Expression vector cloning was performed using the pAV4 vector, which was developed and modified for the purpose of using the parent vector pSGHV0 (GenBank Accession No. AF285183) to manufacture antibodies in the industry.
- the parent vector is overexpressed into cells when a human-derived protein is expressed using bacteria such as Escherichia coli, but in the case of a protein that is difficult to obtain as an active substance, a high concentration of the protein of interest having a physiological activity outside the cell is obtained using animal cells. It is a research vector produced for the purpose of easy purification by expression. However, since there are various limitations to use for production in industry, the vector has been improved to be used in industry in order to use the high expression amount, which is the biggest advantage of this vector for production. In addition, in the case of an antibody, a heavy chain and a light chain must simultaneously express two proteins, so a vector suitable for this purpose has been developed.
- Example 2 Vector Preparation of Modified Antibodies Incorporating ACGHA, a Parent Antibody Having a Binding Capability to the Folate Receptor, and a Metal Ion Binding Motif
- a parental antibody (Fwt) vector capable of binding to a folate receptor
- the heavy chain of SEQ ID NO: 125 and the light chain coding cDNA of SEQ ID NO: 126 were respectively synthesized into codon optimized sequences to maximize expression in CHO cells.
- This gene was cloned into XhoI / NotI and ApaI / SmaI of the pAV4 vector, respectively, to prepare a parental antibody vector (pFwt).
- XhoI-Q5-F was used as a template to prepare FM2 (Fwt-ACGHAACGHA (SEQ ID NO: 5), FM2), a modified antibody of Fwt having two metal ion binding motifs (ACGHA), as a template.
- PCR was performed using forward primers (5'-GCTCCTCGAGGCCACCATGGGATGGAGCTGT ATCATCC-3 ': SEQ ID NO: 105) and M2 reverse primer (5'-CCATGCGGCCGCTCATTTAGGCATGGCCA CAAGCAGCATGGCCACAGGCACCCGGAGACAGGGAGAGGC-3': SEQ ID NO: 106).
- the amplified nucleotide was cleaved with two restriction enzymes, XhoI and NotI, present at the ends, and conjugated with an expression vector pFwt having an XhoI / NotI cleavage to prepare a modified antibody vector (pFM2).
- FM1 Fwt-GGGACGHA, pFM1
- ACGHA metal ion binding motif
- a forward primer 5'-GCTCCTCGAGGCCACCATGGGATGGAGCTGT ATCATCC-3 '
- reverse primers 5'-CCATGCGGCCGCTCATTTAGGCATGGCC ACAAGCA CCTC CACCACCCGGAGACAGGGAGA-3 ': SEQ ID NO: 108
- Ez004S Site-directed mutagenesis
- the amplified nucleotide was cleaved with two restriction enzymes, XhoI and NotI, present at the ends, and conjugated with an expression vector pFwt having an XhoI / NotI cleavage to prepare a modified antibody vector (pFM1).
- a forward primer (5'-GCTCCTCGAGGCCACCATGGGATGGAGCTGTATCATCC-3 ': Site-directed mutagenesis (SEQ ID NO: 109) and reverse primers (5'-CCATGCGGCCGCTCATTTAGGCATGGCCACAAGCACCTCCACCAGCATGGCCACAGGCACCCGGAGACAGGGAGAGGC-3 ': SEQ ID NO: 110) using two methods: site-directed mutagenesis (enzymeics EzChange site-directed mutagenesis kit, PCR using two metal ion methods) Glycine linkers were added between the motifs.
- the amplified nucleotide was cleaved with two restriction enzymes, XhoI and NotI, present at the ends, and conjugated with an expression vector pFwt having an XhoI / NotI cleavage to prepare a modified antibody vector (pFM2L).
- ACGHAACGHA (SEQ ID NO: 5)
- two metal ion binding motifs present in the FM2 modified antibody a modified antibody FM2a (Fwt-ASGHAACGHA ( SEQ ID NO: 26), a forward primer (5'-GCTCCTCGAGGCCACCATGGGATGGAGCTGT ATCATCC-3 ') and a reverse primer (5'-CAGATTGCGGCCGCTCATTAGGCATGGCCACAAGCAGCATGGCCGA AGGCACCCG: SEQ ID NO: 112) was used to replace inner cysteine with serine using PCR.
- the amplified nucleotide was cleaved with two restriction enzymes, XhoI and NotI, present at the ends, and conjugated with the expression vector pFwt having the XhoI / NotI cleavage to prepare a modified antibody vector (pFM2a).
- the two metal ion binding motifs present in the FM2 modified antibody, FM2b (Fwt-ACGHAASGHA (SEQ ID NO: 21)), in which only one metal ion binding motif exists, by replacing the outer cysteine with serine
- a forward primer (5'-GCTCCTCGAGGCCACCATGGGATGGAGCTGTATCATCC-3 ': SEQ ID NO: 113)
- a reverse primer (5'-CAGATTGCGGCCGCTCATTAGGCATGGCCTGAAGCAGCATGGCCACA GGCACCC-3): Internal cysteine was replaced with serine by PCR using site-directed mutagenesis (EzChange Site-directed mutagenesis kit, Ez004S).
- the amplified nucleotide was cleaved with two restriction enzymes, XhoI and NotI, present at the ends, and conjugated with an expression vector pFwt having an XhoI / NotI cleavage to prepare a modified antibody vector (pFM2b).
- CHO-K1 Chinese hamster ovary cells
- DMEM Dulbecco's Modified Eagle Media
- FBS Fetal Bovine Serum
- antibiotics at 37 ° C, 5% CO 2 , incubator.
- DMEM Dulbecco's Modified Eagle Media
- FBS Fetal Bovine Serum
- antibiotics at 37 ° C, 5% CO 2 , incubator.
- cells were inoculated at a concentration of 5 ⁇ 10 6 / ml in a 100 mm culture dish, followed by incubation with 800 ⁇ l of DMEM without FBS and antibiotics, and 10 ⁇ g of Fwt or modified.
- the antibody expression vector was mixed and maintained at room temperature for 1 minute, and then mixed with 20 ⁇ g of PEI (Polyethylenimine, linear, Polysciences Inc (Cat. No: 23966, MW ⁇ 25,000)) and left at room temperature for 10 to 15 minutes. .
- PEI Polyethylenimine, linear, Polysciences Inc (Cat. No: 23966, MW ⁇ 25,000)
- the cells cultured one day ago were washed with PBS and 6 ml of DMEM was added.
- Expression vectors of Fwt or its modified antibodies left at room temperature for 10-15 minutes were added to this culture dish.
- Fwt and its metal ion binding motif modified antibody was purified as follows. Specifically, in order to purify the Fwt and its metal ion binding motif-modified antibody secreted into the cell culture, the culture medium was centrifuged to remove the cells, and then only the supernatant was taken and the supernatant was equilibrated with the equilibration buffer HiTrap Protein A HP. (GE Healthcare, USA) The protein was eluted by injection into the column, washing well with equilibration buffer, and changing the pH with Glycine buffer (100 mM Glycine, pH 2.8). The solution was dialyzed with phosphate buffer, concentrated using Vivaspin20 (Sartorius, USA), and finally purified protein was obtained with high purity.
- Glycine buffer 100 mM Glycine, pH 2.8
- a modified antibody of MMAE and Fwt was conjugated to prepare an FMx (metal ion-binding motif variant of Fwt) -MMAE conjugate.
- FMx metal ion-binding motif variant of Fwt
- MMAE conjugation derivative of Auristatin known as MMAE
- MC maleimido caproic acid
- V valine-citurulline
- PAB para-aniline benzoic acid
- Auristatin is a substance with strong intracellular toxicity and IC 50 value in the cell proliferation inhibition test is known to be 200 ⁇ 300 pM. .
- Modified antibodies such as FM1, FM2, FM2a, and FM2L show conjugation yields of about 63-66% under the same drug conjugation conditions, while FM2b shows very high drug conjugation yields of 97.5%.
- FM2b nearly identical conjugation yields were shown in samples from two different transfection batches.
- an antibody-drug conjugate that binds to a thiol group of cysteine through a bromoacetamide group was prepared.
- Bromoacetamide is bound to MMAE via valine-citurulline, which is degraded by protease in cells, and para-aniline benzoic acid (PABA), a self-decomposing spacer group.
- PABA para-aniline benzoic acid
- MMAE is bound to the modified antibody through the coupling of bromoacetamide and thiol group. This is called br (bromo acetamide) -VC (valine-citurulline) -PAB-MMAE.
- the yield of drug conjugated to the heavy chain between each of the modified antibodies shows that the conjugate yield of FM2b is superior to other modified antibodies.
- FM2b showed superior conjugation yield compared to other modified antibodies.
- a modified antibody was prepared by introducing a metal ion motif containing cysteine at the C-terminus of trastuzumab.
- HM2 HR-ACGHAACGHA (SEQ ID NO: 5), HM2
- ACGHA metal ion binding motifs
- pHR a vector of the parent antibody trastuzumab was used.
- PCR was performed using forward primers (5'-GCTCCTCGAGGCCACCATGGGATGGAGCTGT ATCATCC-3 ': SEQ ID NO: 111) and M2 reverse primers (5'-CCATGCGGCCGCTCATTTAGGCATGGCCA CAAGCAGCATGGCCACAGGCACCCGGAGACAGGGAGAGGC-3': SEQ ID NO: 112).
- the amplified nucleotides were cleaved with two restriction enzymes, XhoI and NotI, present at the ends, and conjugated with an expression vector pHR having an XhoI / NotI cleavage to prepare a modified antibody vector (pHM2).
- ACGHAACGHA (SEQ ID NO: 5), two metal ion-binding motifs present in the HM2 modified antibody, a substitution antibody HM2a (HR-ASGHAACGHA ( SEQ ID NO: 26), a forward primer (5'-GCTCCTCGAGGCCACCATGGGATGGAGCTGT ATCATCC-3 ': SEQ ID NO: 111) and a reverse primer (5'-CAGATTGCGGCCGCTCATTAGGCATGGCCACAAGCAGCATGGCCGA AGGCAG-3CC): SEQ ID NO: 112) was used to replace inner cysteine with serine using PCR.
- the amplified nucleotide was cleaved with two restriction enzymes, XhoI and NotI, present at the ends, and conjugated with an expression vector pHR having an XhoI / NotI cleavage to prepare a modified antibody vector (pHM2a).
- HM2b two metal ion binding motifs present in the HM2 modified antibody, HM2b (HR-ACGHAASGHA (SEQ ID NO: 21)), a variant antibody in which only one metal ion binding motif exists by replacing the outer cysteine with serine
- the forward antibody (5'-GCTCCTCGAGGCCACCATGGGATGGAGCTGTATCATCC-3 ': SEQ ID NO: 109)
- the reverse primer (5'-CAGATTGCGGCCGCTCATTAGGCATGGCCTGAAGCAGCATGGCCACA GGCACGA)
- EzChange Site-directed mutagenesis kit, Ez004S site-directed mutagenesis
- the amplified nucleotide was cleaved with two restriction enzymes, XhoI and NotI, present at the ends, and conjugated with an expression vector pHR having an XhoI / NotI cleavage to prepare a modified antibody vector (pHM2b).
- CHO-K1 Chinese hamster ovary cells
- HM2, HM2a, HM2b trastuzumab modified antibodies
- HM2b trastuzumab modified antibodies
- DMEM Dulbecco's Modified Eagle Media
- FBS Fetal Bovine Serum
- the modified antibody expressed as above was purified as follows. Specifically, in order to purify the modified antibody secreted into the cell culture, the culture medium was centrifuged to remove the cells, and then only the supernatant was taken and the supernatant was equilibrated with the equilibration buffer HiTrap Protein A HP (GE Healthcare, USA) column. The protein was eluted by changing the pH with Glycine buffer (100mM Glycine, pH 2.8) after washing with equilibration buffer. The solution was dialyzed with phosphate buffer, concentrated using Vivaspin20 (Sartorius, USA), and finally purified protein was obtained with high purity.
- Glycine buffer 100mM Glycine, pH 2.8
- the modified antibody of trastuzumab produced in Example 6, 7 was conjugated with MMAE to prepare a HMx (metal ion binding motif variant of Trastuzumab) -MMAE conjugate.
- HMx metal ion binding motif variant of Trastuzumab
- MMAE metal ion binding motif variant of Trastuzumab
- TCEP a reducing agent per equivalent of purified antibody
- MC-vc-PAB-MMAE 2.5 equivalents of MC-vc-PAB-MMAE are added and reacted at room temperature for 2 hours.
- reaction was terminated by the addition of excess cysteine, and excess MC-vc-PAB-MMAE and TCEP were removed through dialysis in a centrifugal filtration filter and phosphate buffer to remove the final purified FMx-MC-vc-PAB-MMAE. Prepared.
- the yield of drug conjugation to the heavy chain between the modified antibodies shows a very large difference.
- the modified antibodies of HM2 and HM2a show about 55-62% conjugation yield under the same drug conjugation conditions, while HM2b shows very high drug conjugation yield of 85.5%.
- M2b in which the rear cysteine was substituted with serine in M2 (ACGHAACGHA), which is a metal ion binding motif, showed much higher drug binding ability than the M2 sequence.
- a modified antibody was substituted with various amino acids at this position.
- Modified antibody which substituted another amino acid at serine site in M2b sequence
- Modified antibody C-terminal metal ion binding motif sequence M2b or M2b-S ACGHAASGHA SEQ ID NO: 21) M2b-A ACGHAAAGHA (SEQ ID NO: 33) M2b-T ACGHAATGHA (SEQ ID NO 45) M2b-Y ACGHAAYGHA (SEQ ID NO 57) M2b-D ACGHAADGHA (SEQ ID NO: 69) M2b-K ACGHAAKGHA (SEQ ID NO: 81) M2b-F ACGHAAFGHA (SEQ ID NO: 93)
- modified antibodies having the C-terminal sequence as shown in Table 7 above were introduced into FM2b or FM2b-S, respectively, of FM2b-A, FM2b-T, FM2b-Y, FM2b-D, FM2b-K, and FM2b-F. Modified antibodies were produced.
- X A, T, Y, D, K, or F
- TCEP a reducing agent per equivalent of purified antibody
- MC-vc-PAB-MMAE 2.5 equivalents of MC-vc-PAB-MMAE are added and reacted at room temperature for 2 hours.
- the reaction was terminated by the addition of excess cysteine and excess MC-vc-PAB-MMAE and TCEP were removed via dialysis in a centrifugal filtration filter and phosphate buffer solution to obtain the final purified FMb-X-MC-vc-PAB- MMAE was prepared.
- the yield of conjugation to the heavy chain of each modified antibody is shown in Table 8 below.
- Each modified antibody prepared as in the above embodiment four-drug conjugate is modified number of the bonding substance (DAR: drug-to-antibody ratio) per antibody because it is different, to compare the cytotoxicity of the drug from in vitro Is not easy. Therefore, in order to purify the modified antibody-drug conjugate with the same DAR, the modified antibody-drug conjugate was purified using hydrophobic chromatography. Phenyl column chromatography was used to purify the modified antibody-drug conjugate having a DAR of 2. The column was equilibrated with 10 mM sodium succinate, 0.5 M NaCl, pH 5.0 buffer, and then the modified antibody-drug conjugate was injected into the column.
- DAR drug-to-antibody ratio
- the buffer containing 30% acetonitrile was added to elute the modified antibody-drug conjugate according to DAR.
- the eluted modified antibody-drug conjugates were exchanged for buffer using dialysis in a buffer solution of 10 mM sodium succinate, 30 mM sucrose, pH 6.0.
- FM2b-S-D2, FM2b-F-D2, FM2b-K-D2, FM2b-Y which are antibody-drug conjugates having two conjugated MC-vc-PAB-MMAE drugs as in Examples 9, 10, and 11 above Produced -D2.
- the produced antibody-drug conjugates were incubated at 25 ° C. and 50 ° C., respectively, to measure the change in the number of drug conjugates and the change in aggregation.
- Each test sample was prepared at a concentration of 110 uL at a concentration of 1 mg / mL, each of 12.
- Six samples of each antibody-drug conjugate were stored at 25 ° C. and the remaining six samples were kept at 0 ° C. for 1, 3, 5, 7, and 14 days to measure changes in DAR and monomer.
- the content of DAR2 was decreased by 1.5 ⁇ 2% for each sample, and the purity of monomer was observed about 0.3 ⁇ 4%, but the difference was not large. Changes in DAR2 content and monomer purity at 50 ° C were larger than those observed at 25 ° C, but the differences between samples were not significant. Therefore, it was confirmed that the difference between the antibody variants is not very large.
- cell growth inhibitory activity was performed using KB-cells overexpressed with the folate receptor.
- KB-cells were diluted in DMEM / F12 medium with 10% FBS adjusted to 1 ⁇ 10 4 / well and 100 ⁇ l cell culture was added to each well of a 96-well plate. It was. The well plates were then incubated for 24 hours in an incubator set at 5% carbon dioxide and 37 ° C. to attach the cells to the plates.
- Each test sample was diluted in medium and added to final concentrations of 6.45 nM, 3.23 nM, 1.61 nM, 0.806 nM, 0.403 nM, 0.202 nM, 0.101 nM, 0.0504 nM, 0.0252 nM and 0.0126 nM, together with the medium in the control wells. (No drug) was added.
- CellTiter 96- AQueous One Solution reagent [MTS-based assay; MTS forms purple formazan by dehydrogenase of living cells, and proliferation is measured by the amount of purple formazan produced]
- MTS-based assay MTS forms purple formazan by dehydrogenase of living cells, and proliferation is measured by the amount of purple formazan produced
- Cell lysis was measured at 490 nm using an absorbance spectrometer to determine viability (%).
- FM2-D2 modified antibody-drug conjugate having DAR 2 as MMAE drug conjugate of modified antibody FM2
- FM2b purified after conjugation of the parent antibody Fwt with MMAE in the above example
- -D2 modified antibody-drug conjugate having DAR 2 as MMAE drug conjugate of modified antibody FM2b
- the antibody-drug conjugates FM2-D2 and FM2b-D2 show superior anticancer efficacy compared to the parent antibody.
- FM2-D2 and FM2b-D2 show nearly identical cancer cell growth inhibition.
- MC-vc-PAB-MMAE was conjugated to FM2b-S, -F, and -Y variants and purified to have the same DAR. Then, after treating the KB cells as described above, the cell growth inhibition of the drug was compared.
- FM2b-S-D2 and FM2b-F-D2 show almost the same cell growth inhibition.
- the respective IC 50 values were 0.25 nM for FM2b-S-D2, 0.26 nM for FM2b-F-D2, and 0.24 nM for FM2b-Y-D2.
- the antibody-drug conjugate produced by the antibody variant according to the present invention can greatly improve the productivity of the antibody-drug conjugate by increasing the conjugation yield of the drug.
- the drug conjugated to the terminal portion of the antibody through position-specific conjugation does not inhibit the structural stability of the parent antibody, thereby maintaining the antigen specificity and structural stability of the parent antibody originally, and the high antigen possessed by the parent antibody. Specificity allows the drug conjugated to the antibody to be specifically delivered to cancer cells.
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Abstract
Description
구분 | 서열 | 번호 |
중쇄 | EVQLVESGGGVVQPGRSLRLSCSASGFTFSGYGLSWVRQAPGKGLEWVAMISSGGSYTYYADSVKGRFAISRDNAKNTLFLQMDSLRPEDTGVYFCARHGDDPAWFAYWGQGTPVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEPKSCDKTHTCPPCPAPELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK | 서열번호 115 |
경쇄 | DIQLTQSPSSLSASVGDRVTITCSVSSSISSNNLHWYQQKPGKAPKPWIYGTSNLASGVPSRFSGSGSGTDYTFTISSLQPEDIATYYCQQWSSYPYMYTFGQGTKVEIKRTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTKSFNRGEC | 서열번호 116 |
구분 | 서열 | 번호 |
FM2 중쇄 | EVQLVESGGGVVQPGRSLRLSCSASGFTFSGYGLSWVRQAPGKGLEWVAMISSGGSYTYYADSVKGRFAISRDNAKNTLFLQMDSLRPEDTGVYFCARHGDDPAWFAYWGQGTPVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEPKSCDKTHTCPPCPAPELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGACGHAACGHA | 서열번호 117 |
FM2a 중쇄 | EVQLVESGGGVVQPGRSLRLSCSASGFTFSGYGLSWVRQAPGKGLEWVAMISSGGSYTYYADSVKGRFAISRDNAKNTLFLQMDSLRPEDTGVYFCARHGDDPAWFAYWGQGTPVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEPKSCDKTHTCPPCPAPELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGASGHAACGHA | 서열번호 118 |
FM2b 중쇄 | EVQLVESGGGVVQPGRSLRLSCSASGFTFSGYGLSWVRQAPGKGLEWVAMISSGGSYTYYADSVKGRFAISRDNAKNTLFLQMDSLRPEDTGVYFCARHGDDPAWFAYWGQGTPVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEPKSCDKTHTCPPCPAPELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGACGHAASGHA | 서열번호 119 |
FM1 중쇄 | EVQLVESGGGVVQPGRSLRLSCSASGFTFSGYGLSWVRQAPGKGLEWVAMISSGGSYTYYADSVKGRFAISRDNAKNTLFLQMDSLRPEDTGVYFCARHGDDPAWFAYWGQGTPVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEPKSCDKTHTCPPCPAPELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGGGGACGHA | 서열번호 120 |
FM2L 중쇄 | EVQLVESGGGVVQPGRSLRLSCSASGFTFSGYGLSWVRQAPGKGLEWVAMISSGGSYTYYADSVKGRFAISRDNAKNTLFLQMDSLRPEDTGVYFCARHGDDPAWFAYWGQGTPVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEPKSCDKTHTCPPCPAPELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGACGHAGGGACGHA | 서열번호 121 |
변형항체 | FM1 | FM2 | FM2a | FM2b | FM2L |
접합수율 | 62.7% | 64.1% | 64.5% | 97.5% | 66.3% |
변형항체 | FM1 | FM2 | FM2a | FM2b | FM2L |
접합수율 | 42% | 44% | 38% | 73% | 49% |
변형항체 | FM1 | FM2 | FM2a | FM2b | FM2L |
접합수율 | 51% | 53% | 44% | 80% | 55% |
변형항체 | HM2 | HM2a | HM2b |
접합수율 | 55.5% | 62.4% | 85.5% |
변형항체 | C-말단의 금속이온 결합 모티프 서열 |
M2b 또는 M2b-S | ACGHAASGHA (서열번호 21) |
M2b-A | ACGHAAAGHA (서열번호 33) |
M2b-T | ACGHAATGHA (서열번호 45) |
M2b-Y | ACGHAAYGHA (서열번호 57) |
M2b-D | ACGHAADGHA (서열번호 69) |
M2b-K | ACGHAAKGHA (서열번호 81) |
M2b-F | ACGHAAFGHA (서열번호 93) |
변형항체 | FM2b | FM2b-A | FM2b-T | FM2b-Y | FM2b-D | FM2b-K | FM2b-F |
접합수율 | 72.8% | 62.5% | 69% | 74.5% | 58.9% | 75.3% | 72.9% |
보관온도 | 시료 | Day 0 | Day 1 | Day 3 | Day 5 | Day 7 | Day 15 |
25℃ | FM2b-S-D2 | 97.6 | 97.6 | 97.2 | 96.4 | 95.6 | 95.1 |
FM2b-F-D2 | 97 | 97.8 | 97.2 | 96.6 | 96.1 | 95 | |
FM2b-K-D2 | 97.6 | 97.6 | 97.3 | 96.6 | 96.1 | 96.3 | |
FM2b-Y-D2 | 96.7 | 96.6 | 97 | 95.8 | 95.4 | 94.9 | |
50℃ | FM2b-S-D2 | 97.6 | 93.9 | 88.8 | 82.8 | 79.1 | 68.9 |
FM2b-F-D2 | 97 | 93.7 | 86.9 | 80.9 | 76.9 | 63.5 | |
FM2b-K-D2 | 97.6 | 93.9 | 87.7 | 81.8 | 77.8 | 66.8 | |
FM2b-Y-D2 | 96.7 | 93.9 | 88.4 | 82.7 | 77.9 | 66.6 |
보관온도 | DAY | Day 0 | Day 1 | Day 3 | Day 5 | Day 7 | Day 15 |
25℃ | FM2b-S-D2 | 98.9 | 98.6 | 98.6 | 98.2 | 98.4 | 98.1 |
FM2b-F-D2 | 98.2 | 98.4 | 98.4 | 98.2 | 98.3 | 97.9 | |
FM2b-K-D2 | 97.9 | 97.4 | 97.5 | 97.3 | 97.3 | 97 | |
FM2b-Y-D2 | 97.6 | 97.6 | 97.4 | 96.6 | 95.5 | 93.2 | |
50℃ | FM2b-S-D2 | 98.9 | 97.1 | 93.6 | 91.8 | 90.7 | 87.9 |
FM2b-F-D2 | 98.2 | 96.5 | 93.2 | 89.4 | 88.3 | 85.1 | |
FM2b-K-D2 | 97.9 | 96.2 | 94.6 | 91.8 | 90.8 | 88.9 | |
FM2b-Y-D2 | 97.6 | 95.8 | 91.3 | 89.4 | 87.6 | 84.4 |
Claims (14)
- 하기 구조식 (1)로 표시되는 모티프를 항체의 말단에 포함하는 변형항체가 링커를 통해 약물에 결합된 항체-약물 접합체:구조식 (1)Xa-[Mmotif1]n1-Xb-[Mmotif2]n2상기 식에서, Mmotif1 또는 Mmotif2는 각각 독립적으로 ACGHA (서열번호 1), AHGCA (서열번호 2), AXGHA (서열번호 3) 및 AHGXA (서열번호 4)로 구성된 서열 중 어느 하나를 포함하고, 상기 서열번호 3 또는 4에서 X는 시스테인 이외의 아미노산 잔기를 포함하며,Xa 및 Xb는 각각 독립적으로 A (alanine), S (serine), G (glycine)로 이루어진 군에서 선택된 아미노산 잔기가 0개 내지 20개로 구성된 펩타이드이며,n1 및 n2는 각각 1 내지 10의 정수이다.
- 제1항에 있어서, 상기 Mmotif2는 AXGHA (서열번호 3)을 포함하고, X는 시스테인 이외의 아미노산 잔기 것을 특징으로 하는 항체-약물 접합체.
- 제1항에 있어서, 상기 Mmotif1 또는 Mmotif2의 X는 세린 (S), 글리신 (G), 알라닌 (A), 트레오닌 (T), 타이로신 (Y), 아스파르트산(D), 라이신 (K) 및 페닐알라닌 (F)으로 구성된 군에서 선택된 아미노산 잔기인 것을 특징으로 하는 항체-약물 접합체.
- 제1항에 있어서, 상기 구조식 (1)로 표시되는 모티프는 서열번호 5 내지 104로 구성된 군에서 선택된 하나 이상의 서열을 포함하는 것을 특징으로 하는 항체-약물 접합체.
- 제1항에 있어서, 상기 모티프는 항체의 중쇄 C-말단에 도입되는 것을 특징으로 하는 항체-약물 접합체.
- 제1항에 있어서, 상기 링커는 모티프에 결합하는 반응성 기능기, 아미노산 및 자가 절단 스페이서를 포함하는 것을 특징으로 하는 항체-약물 접합체.
- 제1항에 있어서, 상기 약물은 마이탄시노이드, 오리스타틴, 아미노프테린, 악티노마이신, 블레오마이신, 탈리소마이신, 캄프토쎄신, N8-아세틸 스퍼미딘, 1-(2 클로로에틸)-1,2-다이메틸 술포닐 하이드라자이드, 에스퍼라마이신, 에토포사이드, 6-머캅토퓨린, 돌라스타틴, 트리코테센, 칼리케아미신, 탁산, 메토트렉세이트, 빈크리스틴, 빈블라스틴, 독소루비신, 멜팔란, 미토마이신 A, 미토마이신 C, 클로람부실, 듀오카마이신, 핵산 분해 효소, 세균이나 동식물 유래의 독소, 시스플라틴, 이리노테칸, 파클리탁셀 및 도세탁셀에서 선택된 하나 이상인 것을 특징으로 하는 항체-약물 접합체.
- 제1항에 있어서, 상기 항체는 모노클로날 항체, 이중특이적 항체, 키메릭 항체, 인간 항체 및 인간화 항체로 구성된 군에서 선택된 하나 이상인 것을 특징으로 하는 항체-약물 접합체.
- 제1항에 있어서, 상기 항체는 IgA, IgD, IgE, IgG 및 IgM으로 구성된 군에서 선택되는 것을 특징으로 하는 항체-약물 접합체.
- 제1항에 있어서, 상기 항체는 암 특이 항원, 세포 표면 수용체 단백질, 세포 표면 단백질, 막횡단 단백질, 신호전달 단백질, 세포생존 조절인자, 세포 증식 조절인자, 조직 발달 또는 분화와 연관된 분자, 림포카인, 사이토카인, 세포 주기 조절에 관련된 분자, 혈관형성에 관련된 분자, 또는 혈관신생에 관련된 분자에 대한 결합능과 특이성을 가지는 것을 특징으로 하는 항체-약물 접합체.
- 제1항에 있어서, 상기 항체는,(1) BMPR1B (골 형태형성 단백질 수용체-IB형, 진뱅크 승인 번호 NM_001203);(2) E16 (LAT1, SLC7A5, 진뱅크 승인 번호 NM_003486);(3) STEAP1 (전립선의 6회의 막횡단 상피 항원, 진뱅크 승인 번호 NM_012449);(4) 0772P (CA125, MUC16, 진뱅크 승인 번호 AF361486);(5) MPF (MPF, MSLN, SMR, 거핵세포 강화 인자, 메소텔린, 진뱅크 승인 번호 NM_005823);(6) Napi3b (NAPI-3B, NPTIIb, SLC34A2, 용질 운반체 족 34 (인산나트륨), 구성원 2, 제II형 나트륨-의존성 포스페이트 수송체 3b, 진뱅크 승인 번호 NM_006424);(7) Sema 5b (FLJ10372, KIAA1445, Mm.42015, SEMA5B, SEMAG, 세마포린 5b Hlog, 세마 도메인, 7개의 트롬보스폰딘 반복체 (제1형 및 유사 제1형), 막횡단 도메인 (TM) 및 짧은 세포질 도메인, (세마포린) 5B, 진뱅크 승인 번호 AB040878);(8) PSCA hlg (2700050C12Rik, C530008O16Rik, RIKEN cDNA 2700050C12, RIKEN cDNA 2700050C12 유전자, 진뱅크 승인 번호 AY358628);(9) ETBR (엔도텔린 B형 수용체, 진뱅크 승인 번호 AY275463);(10) MSG783 (RNF124, 가상 단백질 FLJ20315, 진뱅크 승인 번호 NM_017763);(11) STEAP2 (HGNC_8639, IPCA-1, PCANAP1, STAMP1, STEAP2, STMP, 전립선암 관련 유전자 1, 전립선암 관련단백질 1, 전립선의 6회의 막횡단 상피 항원 2, 6회의 막횡단 전립선 단백질, 진뱅크 승인 번호 AF455138);(12) TrpM4 (BR22450, FLJ20041, TRPM4, TRPM4B, 일시적 수용체 잠재적 양이온 채널, M 아족, 구성원 4, 진뱅크 승인 번호 NM_017636);(13) CRIPTO (CR, CR1, CRGF, CRIPTO, TDGF1, 기형암종-유래 성장인자, 진뱅크 승인 번호 NP_003203 또는 NM_003212);(14) CD21 (CR2 (보체 수용체 2) 또는 C3DR (C3d/엡스타인 바르 바이러스 수용체) 또는 Hs.73792 진뱅크 승인 번호 M26004);(15) CD79b (CD79B, CD79β, IGb (이뮤노글로불린-관련 베타), B29, 진뱅크 승인 번호 NM_000626);(16) FcRH2 (IFGP4, IRTA4, SPAP1A (SH2 도메인 함유 포스파타제 고정 단백질 1a), SPAP1B, SPAP1C, 진뱅크 승인 번호 NM_030764);(17) HER2 (진뱅크 승인 번호 M11730)(18) EGFR, HER3 및 HER4로부터 선택된 ErbB 수용체(19) NCA (진뱅크 승인 번호 M18728);(20) MDP (진뱅크 승인 번호 BC017023);(21) IL20Rα (진뱅크 승인 번호 AF184971);(22) 브레비칸 (진뱅크 승인 번호 AF229053);(23) EphB2R (진뱅크 승인 번호 NM_004442);(24) ASLG659 (진뱅크 승인 번호 AX092328);(25) PSCA (진뱅크 승인 번호 AJ297436);(26) GEDA (진뱅크 승인 번호 AY260763);(27) BAFF-R (B 세포 활성화 인자 수용체, BLyS 수용체 3, BR3, NP_443177.1);(28) CD22 (B-세포 수용체 CD22-B 이소형, NP-001762.1);(29) CD79a (Ig 베타 (CD79B)와 공유적으로 상호작용하고 IgM 분자와 표면에서 복합체를 형성하는 B 세포 특이적 단백질인 CD79A, CD79α, 이뮤노글로불린-관련 알파는 B 세포 분화에 관여하는 신호를 전달함, 진뱅크 승인 번호 NP_001774.1);(30) CXCR5 (CXCL13 케모킨에 의해 활성화된 G 단백질 커플링된 수용체인 버킷 림프종 수용체 1은 림프구 이동 및 체액성 방어에 작용하고 HIV-2 감염에 참여하며, AIDS, 림프종, 골수종 및 백혈병의 발병과 관련이 있다고 여겨짐, 진뱅크 승인 번호 NP_001707.1);(31) HLA-DOB (펩티드에 결합하여 CD4+ T 림프구에 제시하는, MHC 클래스 II 분자 (Ia 항원)의 베타 서브유닛, 진뱅크 승인 번호 NP_002111.1);(32) P2X5 (세포외 ATP에 의해 게이트되는 이온 채널인, 퓨린성 수용체 P2X 리간드-게이트 이온 채널 5는 시냅스 전달 및 신경발생에 관여할 수 있으며, 이의 결핍은 특발성 배뇨근 불안정의 병태생리에 기여할 수 있음, 진뱅크 승인 번호 NP_002552.2);(33) CD72 (B-세포 분화 항원 CD72, Lyb-2, 진뱅크 승인 번호 NP_001773.1);(34) LY64 (루이신 풍부 반복체 (LRR) 족의 제I형 막 단백질인, 림프구 항원 64 (RP105)는 B 세포 활성화 및 세포자멸을 조절하며, 이것의 기능 상실은 전신성 홍반성 루푸스 환자의 질병 활성 증가와 관련이 있음, 진뱅크 승인 번호 NP_005573.1);(35) FcRH1 (C2형 Ig-유사 및 ITAM 도메인을 함유하는 이뮤노글로불린 Fc 도메인에 대한 추정적 수용체인 Fc 수용체 유사 단백질 1은 B 림프구 분화에 관여할 수 있음, 진뱅크 승인 번호 NP_443170.1);(36) IRTA2 (B 세포 발생 및 림프종발생에 작용할 수 있는 추정적 면역수용체인 이뮤노글로불린 거대족 수용체 전좌 관련 2, 전좌에 의한 상기 유전자 탈조절은 몇몇 B 세포 악성종양에서 일어남, 진뱅크 승인 번호 NP_112571.1);(37) TENB2 (성장 인자의 EGF/헤레굴린 족 및 폴리스타틴과 관련이 있는 추정적 막횡단 프로테오글리칸, 진뱅크 승인 번호 AF179274);(38) MAGE-C1/CT7 (고환암 과발현 단백질);(39) androgen receptor, PTEN, human kallikrein-related peptidase 3 (전립선암에서 과발현되는 단백질);(40) CD20;(41) CD30;(42) CD33;(43) CD52;(44) EpCam;(45) CEA;(46) gpA33;(47) Mucins;(48) TAG-72;(49) Carbonic anhydrase IX;(50) PSMA;(51) folate receptor (FOLR gene에 의해서 발현되는 단백질 패밀리. Folic acid와 높은 결합력을 가지고 있으며, 5-methyltetrahydrofolate를 세포 내로 운반한다);(52) gangliosides (GD2, GD3, GM2);(53) 당수화물 Lewis-Y;(54) VEGF;(55) VEGFR;(56) aVb3;(57) a5b1;(58) ERB3;(59) c-MET;(60) EphA3;(61) TRAIL-R1, TRAIL-R2;(62) RANKL;(63) FAP; 및(64) Tenascin로 구성된 군에서 선택된 하나 이상의 타겟에 결합능을 가지는 것을 특징으로 하는 항체-약물 접합체.
- 제1항에 있어서, 상기 항체는 가변영역 및 IgG2 또는 IgG4의 CH1, CH2 및 CH3를 포함, 또는 Fab 및 IgG2 또는 IgG4의 Fc를 포함하는 것을 특징으로 하는 항체-약물 접합체.
- 제1항에 있어서, 상기 약물은 모티프의 시스테인 또는 X에 접합되는 것을 특징으로 하는 항체-약물 접합체.
- 제1항 내지 제13항 중 어느 한 항에 따른 항체-약물 접합체를 포함하는 암 예방 또는 치료용 조성물.
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