WO2025209482A1 - 一种连接子、抗体药物偶联物及其制备方法 - Google Patents
一种连接子、抗体药物偶联物及其制备方法Info
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- WO2025209482A1 WO2025209482A1 PCT/CN2025/086645 CN2025086645W WO2025209482A1 WO 2025209482 A1 WO2025209482 A1 WO 2025209482A1 CN 2025086645 W CN2025086645 W CN 2025086645W WO 2025209482 A1 WO2025209482 A1 WO 2025209482A1
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- Prior art keywords
- antibody
- group
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/32—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against translation products of oncogenes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
- A61K31/4164—1,3-Diazoles
- A61K31/4184—1,3-Diazoles condensed with carbocyclic rings, e.g. benzimidazoles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- 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
- A61K47/51—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 the non-active ingredient being a modifying agent
- A61K47/68—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 the non-active ingredient being a modifying agent the modifying agent being an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/36—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against blood coagulation factors
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
- C07K2317/24—Immunoglobulins specific features characterized by taxonomic origin containing regions, domains or residues from different species, e.g. chimeric, humanized or veneered
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
- C07K2317/56—Immunoglobulins specific features characterized by immunoglobulin fragments variable (Fv) region, i.e. VH and/or VL
- C07K2317/569—Single domain, e.g. dAb, sdAb, VHH, VNAR or nanobody®
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/90—Immunoglobulins specific features characterized by (pharmaco)kinetic aspects or by stability of the immunoglobulin
- C07K2317/92—Affinity (KD), association rate (Ka), dissociation rate (Kd) or EC50 value
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/90—Immunoglobulins specific features characterized by (pharmaco)kinetic aspects or by stability of the immunoglobulin
- C07K2317/94—Stability, e.g. half-life, pH, temperature or enzyme-resistance
Definitions
- ADCs Antibody-drug conjugates leverage the ability of monoclonal antibodies to specifically recognize specific antigens on the surface of tumor cells, enabling the precise delivery and release of anti-tumor drugs (such as small molecule chemotherapy drugs) to target tumor cells, achieving precise tumor killing.
- ADCs are considered the most promising anti-tumor drugs due to their optimal molecular weight, high stability, strong targeting, and minimal toxic side effects.
- the successful development of ADCs presents numerous challenges that must be considered and addressed.
- ADCs can become unstable and aggregate and settle. Furthermore, excessive lipophilicity can lead to rapid metabolic elimination in metabolic organs such as the liver, resulting in poor PK properties. Therefore, it is necessary to explore how to optimize the physicochemical and pharmacokinetic (PK) properties of ADCs while ensuring high drug loading, based on the structure of the linker.
- PK pharmacokinetic
- X is a linking group
- P1 is a polypeptide residue
- P2 is a chemical bond or an AA-PAB structure; wherein AA is a dipeptide, tripeptide, or tetrapeptide fragment (i.e., a fragment formed by 2-4 amino acids connected by peptide bonds), and PAB is p-aminobenzylcarbamoyl;
- the glucose group includes its precursor or derivative.
- Y is 4-50, preferably 5-30, and more preferably 6-25.
- Y is ⁇ 5, preferably ⁇ 8.
- the Z1 further comprises an amino group.
- the structure of Z1 is selected from the following group:
- A represents an optionally substituted C3-C8 alkylene, C3-C8 alkenyl, C3-C8 alkynyl, C3-C6 cycloalkenyl, C3-C8 cycloalkyl, or an optionally substituted diethylene glycol to octaethylene glycol acyl group
- Ar represents an optionally substituted C5-6 aryl or heteroaryl group
- the optional substitution refers to substitution at any available attachment point of the aryl group.
- the P1 is selected from the following group:
- 1 and 2 represent connection sites respectively; for example, 1 is the site connected to the upper half of Formula A, and 2 is the site connected to the lower half of Formula A.
- D is a cytotoxic small molecule drug selected from the following group: STING agonists, KRAS-G12D inhibitors, tubulin inhibitors, topoisomerase inhibitors, and DNA binders.
- the STING agonist is selected from the following group: diABZI analogs.
- the microtubule protein inhibitor is selected from the following group: maytansine derivatives, monomethyl auristatin-E (MMAE), monomethyl auristatin-F (MMAF), Monomethyl Dolastatin 10 (MMAD), Tubulysin derivatives, Cryptophycin derivatives, Taltobulin; preferably MMAE or MMAF.
- the topoisomerase inhibitor is selected from the following group: SN38, DXd, doxorubicin metabolite PNU-159682 derivatives, exatecan (DX8951), irinotecan (CPT-11) metabolite SN38 derivatives; preferably, it is a topoisomerase 1 (Topo1) inhibitor, such as SN38, DXd or exatecan.
- Topo1 topoisomerase 1
- the DNA binding agent is selected from the following group: PBD derivatives and duocarmycin derivatives.
- the structure of formula A is selected from the following group:
- an antibody-drug conjugate is provided.
- the antibody-drug conjugate is an antibody-drug conjugate (ADC) formed by coupling the compound of formula A according to the first aspect of the present invention with an antibody.
- the conjugate is as shown in Formula B:
- L is a linker
- the antibody includes an antigen-binding fragment, a nanobody, a chimeric antibody, a bivalent antibody, and/or a multivalent antibody.
- the antibody is an animal-derived antibody, a humanized antibody, a chimeric antibody or a chimeric antigen receptor antibody (CAR).
- CAR chimeric antigen receptor antibody
- the CDR region of the humanized antibody comprises 1, 2, or 3 amino acid changes.
- the animal is a non-human mammal, preferably a mouse, sheep, rabbit, or camel.
- the antibody is a double-chain antibody or a single-chain antibody.
- the antibody is a nanobody or a monoclonal antibody.
- the antibody is a partially or fully humanized monoclonal antibody.
- the antibody or nanobody or its fusion protein targets a target selected from the following group: TF, EGFR, HER2, HER3, BCMA, B7-H3, CD73, AXL, DLL3, CD38, CD123, CD19, CD20, CD22, B7-H6, GPC3, PMSA, CD28, 4-1BB, OX40, CD40, CD27, CD3, CTLA4, PD1, PDL1, BCMA, Trop2, TIGIT, LAG-3, TLR7, or a combination thereof.
- the antigen-binding fragment includes: (i) Fab fragment; (ii) F(ab')2 fragment; (iii) Fd fragment; (iv) Fv fragment; (v) single-chain Fv (scFv) molecule; and (vi) dAb fragment.
- the antibody is an antibody or nanobody targeting TF and/or HER2 (anti-TF and/or HER2 antibody, anti-TF and/or HER2 nanobody or a fusion protein thereof).
- the antigen-binding fragment of the TF-targeting nanoantibody has CDR1 as shown in SEQ ID NO.1, CDR2 as shown in SEQ ID NO.2, and CDR3 as shown in SEQ ID NO.3.
- the TF-targeting nanoantibody has a heavy chain variable region as shown in SEQ ID NO.4.
- the antibody-drug conjugate ADC is a monomer, dimer or multimer.
- the antibody includes a functional domain that can improve the physicochemical properties or druggability of the protein, such as an Fc segment, an anti-albumin nanobody (HLE), or an albumin binding domain (ABD).
- a functional domain that can improve the physicochemical properties or druggability of the protein, such as an Fc segment, an anti-albumin nanobody (HLE), or an albumin binding domain (ABD).
- the HER2-targeting nanoantibody includes an Fc segment, and preferably, the HER2-targeting nanoantibody is as shown in any one of SEQ ID NO.7-9.
- Figure 9 shows the in vitro antitumor activity of the humanized antibody 4A02-HM8 (FD40)-Topo1 inhibitor conjugate.
- FD40-LP1-D4, FD40-LP5-D4, and FD40-LP6-D4 demonstrate in vitro proliferation activity against TF-negative breast cancer MDA-453, TF-highly expressing pancreatic cancer HPAF-II and BxPC3, lung cancer NCI-H1373, and triple-negative breast cancer MDA-231 and HCC1806 cells. Dose-effect curves and a summary of IC50 values are shown.
- Figure 11 shows the therapeutic efficacy of FD40-LP1-D4, FD40-LP5-D4, and FD40-LP6-D4 against a nude mouse model of HPAF-II pancreatic cancer xenografts. Seven days after cell inoculation, when tumors had grown to ⁇ 150 mm3 , tumor-bearing mice were randomly divided into groups and given a single intravenous injection of 10 mg/kg TF-NDC.
- Figure 12 shows the therapeutic efficacy of FD40-GGFG-Dxd (10 mg/kg) and FD40-LP5-D4 (10 mg/kg, 5 mg/kg, and 2.5 mg/kg) against a nude mouse model of HPAF-II pancreatic cancer xenografts.
- Figure 13 shows the therapeutic efficacy of FD40-LP5-D4 (10 mg/kg, 5 mg/kg, and 2.5 mg/kg) in a nude mouse model of triple-negative breast cancer HCC1806 xenografts.
- FD40-LP5-D4 10 mg/kg, 5 mg/kg, and 2.5 mg/kg
- Figure 14 shows the in vitro antitumor activity of HER2-NDCs 1-G07-LP5, 1-G07-GGFG-Dxd, and T-Dxd.
- Figure 14A shows the antiproliferative activity of the drugs against gastric cancer NCI-N87 cells.
- Figure 14B shows the antiproliferative activity of the drugs against breast cancer HCC1954 cells. Dose-effect curves and IC50 values are shown.
- Figure 15 shows the therapeutic efficacy of HER2-NDC 1-G07-LP5 and T-Dxd against the NCI-N87 nude mouse xenograft tumor model.
- tumor-bearing mice were randomly divided and treated with 5 mg/kg of T-Dxd once weekly for a total of two doses.
- Figure 16 shows the therapeutic efficacy of HER2-NDC 1-G07-LP5 and T-Dxd in the NCI-N87-Luc intracranial tumor model.
- Figure 17 shows the therapeutic efficacy of TF-NDC FD40-LP5-D4 in the HCC1806-Luc intracranial tumor model. Seven days after intracranial inoculation, tumor growth was monitored using in vivo imaging. Patients were then divided into groups and intravenously administered at a dose of 5 mg/kg for a total of one dose.
- Figure 18 shows the pharmacokinetic experimental results of HER2-NDC 1-G07-LP5 and 1-G07-GGFG-Dxd after intravenous administration in mice, with a dose of 1 mg/kg.
- Figure 21 shows the drug analysis results of gram-scale batches of conjugates scaled up by FD40-LP5.
- Figure 22 shows the weight change results of the FD40-LP5 exploratory safety assessment study in cynomolgus monkeys.
- Figure 23 shows the coagulation index test results of the FD40-LP5 exploratory safety assessment study in crab-eating monkeys.
- Figure 24 shows the blood biochemical index test results of the FD40-LP5 exploratory safety assessment study in crab-eating monkeys.
- Figure 26 shows the pharmacokinetic (TK) test results of the exploratory safety assessment study of FD40-GGFG-Dxd and FD40-LP5 in cynomolgus monkeys.
- Antibody-drug conjugates constructed using this linker exhibit significant tumor-suppressive effects against cell lines derived from various cancers or tumors, and are superior to positive controls. This demonstrates that the antibody-drug conjugates of this invention can be used as therapeutic agents for a variety of solid tumors and hematological tumors, and for the treatment of tumors or cancers. This is the basis for the completion of the present invention.
- the terms “comprising” or “including” may be open, semi-closed, and closed. In other words, the terms also encompass “consisting essentially of” or “consisting of.” Unless the context clearly requires otherwise, throughout the specification and claims, the words “comprising,” “having,” “including,” and the like should be understood to have an inclusive meaning, rather than an exclusive or exhaustive meaning; that is, to mean “including, but not limited to.” Unless otherwise specified, “comprising” includes “consisting of.”
- Non-limiting examples of the polycyclic aromatic group include: naphthyl, anthracenyl, phenanthrenyl, etc.
- the polycyclic aromatic group also includes a phenyl group fused with one or more heterocyclic groups or cycloalkyl groups, or a naphthyl group fused with one or more heterocyclic groups or cycloalkyl groups, wherein the connection point is on the phenyl group or naphthyl group, and in this case, the number of ring atoms continues to represent the number of ring atoms in the polycyclic aromatic ring system, non-limiting examples include:
- the aryl group may be substituted or unsubstituted. When substituted, it may be substituted at any available point of attachment, and the substituents are preferably selected from one or more of a D atom, a halogen, an alkyl group, an alkoxy group, a haloalkyl group, a haloalkoxy group, a cycloalkyloxy group, a heterocyclyloxy group, a hydroxyl group, a hydroxyalkyl group, an oxo group, a cyano group, an amino group, a nitro group, a cycloalkyl group, a heterocyclyl group, an aryl group, and a heteroaryl group.
- heteroaryl refers to a monocyclic heteroaromatic ring (i.e., a monocyclic heteroaryl) or a polycyclic heteroaromatic ring system (i.e., a polycyclic heteroaryl) having a conjugated ⁇ electron system, which contains at least one (e.g., 1, 2, 3, or 4) heteroatoms selected from nitrogen, oxygen, and sulfur (the nitrogen may be optionally oxidized, i.e., to form a nitrogen oxide; the sulfur may be optionally oxidized, i.e., to form a sulfoxide or sulfone, but excluding -O-O-, -O-S-, or -S-S-), and has 5 to 14 (e.g., 5, 6, 7, 8, 9, 10, 11, 12, 13, or 14) ring atoms (i.e., a 5- to 14-membered heteroaryl).
- a monocyclic heteroaromatic ring i.e., a monocyclic heteroaryl
- the heteroaryl is preferably a heteroaryl having 5 to 10 ring atoms (i.e., a 5- to 10-membered heteroaryl), more preferably a heteroaryl having 5 or 6 ring atoms (i.e., a 5- or 6-membered heteroaryl).
- cycloalkyloxy refers to a cycloalkyl-O- group, wherein the cycloalkyl group is as defined above.
- heterocyclyloxy refers to a heterocyclyl-O- group, wherein the heterocyclyl group is as defined above.
- aryloxy refers to an aryl-O- group, wherein the aryl group is as defined above.
- heteroaryloxy refers to a heteroaryl-O- group, wherein the heteroaryl group is as defined above.
- alkylthio refers to an alkyl-S- group, wherein the alkyl group is as defined above.
- hydroxyalkyl refers to an alkyl group substituted with one or more hydroxy groups, wherein alkyl is as defined above.
- halogen refers to fluorine, chlorine, bromine, or iodine.
- hydroxy refers to -OH.
- amino refers to -NH2 .
- cyano refers to -CN.
- DIEA N-ethyldiisopropylamine
- DMF N,N-dimethylformamide
- HOBt O-(7-azabenzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate is abbreviated as HATU.
- 1-Hydroxybenzotriazole is abbreviated as HOBt.
- Substituted means that one or more hydrogen atoms, preferably 1 to 6, more preferably 1 to 3 hydrogen atoms, in a group are independently replaced by a corresponding number of substituents. Those skilled in the art will be able to determine (by experiment or theory) whether substitution is possible or not without undue effort. For example, an amino or hydroxyl group with free hydrogen may be unstable when combined with a carbon atom with an unsaturated (e.g., olefinic) bond.
- amino acid residue refers to the group formed by removing one H from the N-terminal -NH2 of an amino acid and removing the -OH from the C-terminal -COOH.
- segment of an amino acid (residue) including the N-terminus and the C-terminus is called the main chain, and the portion that determines the specific type of amino acid is called the side chain.
- an amino acid residue is represented by -NH-CH(R)-CO-, where R is a side chain (amino acid side chain).
- amino acids include natural amino acids or non-natural amino acids, including D-type and/or L-type amino acids.
- amino acids include, but are not limited to, Ala (A), Arg (R), Asn (N), Asp (D), Cys (C), Gln (Q), Glu (E), Gly (G), His (H), Ile (I), Leu (L), Lys (K), Met (M), Phe (F), Pro (P), Ser (S), Thr (T), Trp (W), Tyr (Y), Val (V).
- the amino acid is an amino acid selected from the following group: L-glycine (L-Gly), L-alanine (L-Ala), ⁇ -alanine ( ⁇ -Ala), L-glutamic acid (L-Glu), L-aspartic acid (L-Asp), L-histidine (L-His), L-arginine (L-Arg), L-lysine (L-Lys), L-valine (L-Val), L-serine (L-Ser), L-threonine (L-Thr); in addition, when the amino acid has two or more amino groups and/or two or more carboxyl groups, the term also includes groups formed by removing one H from -NH2 and -COOH that are not on the same carbon atom, for example, the divalent group -C(O)-( CH2 ) 2 -C(COOH)-NH- formed by removing one H from -NH2 and non- ⁇ -position -COOH of glutamic acid.
- L-Gly
- the term "pharmaceutically acceptable salt” refers to a salt of a compound of the present invention formed with an acid or base that is suitable for pharmaceutical use.
- Pharmaceutically acceptable salts include inorganic salts and organic salts.
- a preferred class of salts are salts formed with a compound of the present invention and an acid.
- subscript p is a value selected from 1-10, preferably 1 to 8.
- drug refers generally to any compound having a desired biological activity and a reactive functional group for preparing the conjugates of the present invention.
- the desired biological activity includes diagnosing, curing, alleviating, treating, or preventing a disease in humans or other animals. Therefore, as long as the necessary reactive functional groups are present, the term “drug” refers to compounds including those identified in official national pharmacopeias, as well as, for example, the official U.S. Homeopathic Pharmacopoeia, the official National Formulary, or any supplements thereof. Typical drugs are listed in the Physician's Desk Reference (PDR) and the Orange Book of the U.S. Food and Drug Administration (FDA). It should be understood that as new drugs are continuously discovered and developed, these drugs should also be included in the "drug" of the conjugates of the present invention.
- PDR Physician's Desk Reference
- FDA Orange Book of the U.S. Food and Drug Administration
- cytotoxic agent refers to a substance that inhibits or prevents the expression activity, function of a cell, and/or causes cell destruction.
- the term includes radioisotopes, chemotherapeutic agents, and toxins, such as small molecule toxins or enzymatically active toxins of bacterial, fungal, plant, or animal origin, including fragments and/or variants thereof.
- cytotoxic agents include, but are not limited to, auristatins (e.g., auristatin E, auristatin F, MMAE, and MMAF), chlortetracycline, maytansinoids, ricin, ricin A-chain, combretastatin, duocarmycin, dolastatin, adriamycin, daunorubicin, paclitaxel, cisplatin, cc1065, ethidium bromide, mitomycin, etoposide, tenoposide, vincristine, vinblastine, colchicine, dihydroxy anthracin dione, actinomycin, diphtheria toxin, Pseudomonas exotoxin (PE) A, PE40, abrin, abrin A chain, modeccin A chain, alpha -sarcin, gelonin, mitogellin, retstrictocin, phenomycin, enomycin,
- Preferred small molecule drugs are compounds with high cytotoxicity, preferably monomethyl auristatin, calicheamicin, maytansine, or a combination thereof; more preferably selected from: monomethyl auristatin-E (MMAE), monomethyl auristatin-D (MMAD), monomethyl auristatin-F (MMAF), or a combination thereof.
- MMAE monomethyl auristatin-E
- MMAD monomethyl auristatin-D
- MMAF monomethyl auristatin-F
- Auriculariaxin peptide drug is auriculariaxin peptide drug.
- Auriculariaxin peptide drugs are analogs of Dolastatin 10, which is a biologically active polypeptide isolated from the marine mollusk Aplysia. Dolastatin 10 inhibits tubulin polymerization by binding to tubulin (the same binding region as vincristine).
- Dolastatin 10, auriculariaxin peptide PE, and auriculariaxin peptide E are all linear polypeptides containing four amino acids (three of which are unique to Dolastatin compounds) and a C-terminal amide group.
- PNU-159682 is the major active metabolite of Nemorubicin in human liver microsomes, and its activity is 3000 times higher than that of MMDX and doxorubicin.
- the present invention also provides a method for preparing an ADC, which may further comprise: combining an antibody with a drug-linker compound (or a drug-linker compound (LD), such as LD-1 to LD-17 shown in the present invention) under conditions sufficient to form an antibody conjugate (ADC).
- a drug-linker compound or a drug-linker compound (LD), such as LD-1 to LD-17 shown in the present invention
- the methods of the present invention comprise conjugating an antibody to a linker compound under conditions sufficient to form an antibody-linker conjugate. In these embodiments, the methods of the present invention further comprise conjugating the antibody-linker conjugate to a drug moiety under conditions sufficient to covalently attach the drug moiety to the antibody via the linker.
- Drug loading also known as the drug-to-antibody ratio (DAR) is the average number of drugs conjugated to each antibody in the ADC. It can be, for example, in the range of about 1 to about 10 drugs conjugated to each antibody, and in certain embodiments, in the range of about 1 to about 8 drugs conjugated to each antibody, preferably in the range of 2-8, 2-7, 2-6, 2-5, 2-4, 3-4, 3-5, 5-6, 5-7, 5-8, and 6-8. Exemplarily, the drug loading can be an average of 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10.
- the ADC formula disclosed herein includes a collection of antibody drug conjugates within the aforementioned range. In embodiments of the present disclosure, the drug loading can be expressed as n, which is a decimal or integer. Drug loading can be determined by conventional methods such as UV/visible spectroscopy, mass spectrometry, ELISA assays, and HPLC.
- the cytotoxic drug is coupled to the antibody via a linker unit.
- the antibody-drug conjugates provided by the present invention can target specific cell populations and bind to specific cell surface proteins (antigens), thereby releasing the drug into the cell in an active form through endocytosis of the conjugate or drug penetration, the antibody-drug conjugates of the present invention can be used to treat target diseases.
- the above-mentioned antibody-drug conjugates can be administered to a subject (e.g., a human) in a therapeutically effective amount through an appropriate route.
- the subject in need of treatment can be a patient who is at risk or suspected of having a condition related to the activity or expression of a specific antigen. Such patients can be identified through routine physical examinations.
- parenteral comprises subcutaneous, intradermal, intravenous, intramuscular, intraarticular, intraarterial, intrasynovial, intrasternal, intrathecal, intralesional and intracranial injection or infusion technology.
- injectable depot approach for example, using 1-, 3-, or 6-month depot injectable or biodegradable material and method theme.
- Injectable compositions may contain various carriers such as vegetable oils, dimethylacetamide, dimethylformamide, ethyl lactate, ethyl carbonate, isopropyl myristate, ethanol, polyols (glycerol, propylene glycol, liquid polyethylene glycol, etc.).
- water-soluble antibodies may be administered by drip infusion of a pharmaceutical formulation containing the antibody and a physiologically acceptable excipient.
- Physiologically acceptable excipients may include, for example, 5% glucose, 0.9% saline, Ringer's solution or other suitable excipients.
- a sterile preparation of a suitable soluble salt form of the antibody may be dissolved and administered in a pharmaceutical excipient such as water for injection, 0.9% saline, or 5% glucose solution.
- delivery can be performed by conventional methods in the art. For example, it can be introduced into cells using liposomes, hydrogels, cyclodextrins, biodegradable nanocapsules, or bioadhesive microspheres.
- the nucleic acid or vector can be delivered locally by direct injection or by using an infusion pump.
- Other methods include various transport and carrier systems using conjugates and biodegradable polymers.
- the pharmaceutical compositions of the present invention contain a safe and effective amount of the antibody-drug conjugate of the present invention and a pharmaceutically acceptable carrier.
- a pharmaceutically acceptable carrier include (but are not limited to): saline, buffer, glucose, water, glycerol, ethanol, and combinations thereof.
- pharmaceutical formulations should be compatible with the mode of administration.
- the pharmaceutical compositions of the present invention can be prepared in the form of solutions, for example, using physiological saline or aqueous solutions containing glucose and other adjuvants by conventional methods.
- the pharmaceutical compositions are preferably manufactured under sterile conditions.
- the active ingredient is administered in a therapeutically effective amount.
- the effective amount of the antibody-drug conjugate of the present invention may vary depending on the mode of administration and the severity of the disease to be treated.
- the selection of the preferred effective amount can be determined by a person of ordinary skill in the art based on various factors (e.g., through clinical trials).
- the factors include, but are not limited to: pharmacokinetic parameters of the antibody conjugate such as bioavailability, metabolism, half-life, etc.; the severity of the disease to be treated, the patient's weight, the patient's immune status, the route of administration, etc.
- pharmacokinetic parameters of the antibody conjugate such as bioavailability, metabolism, half-life, etc.
- the severity of the disease to be treated the patient's weight, the patient's immune status, the route of administration, etc.
- the antibody-drug conjugate of the present invention is administered at a dose of about 0.0001 mg-50 mg/kg animal body weight (preferably 0.001 mg-10 mg/kg animal body weight) per day, satisfactory results can be obtained. For example, depending on
- Dosage forms for topical administration of the compounds of this invention include ointments, powders, patches, sprays and inhalants.
- the active ingredient is mixed under sterile conditions with a physiologically acceptable carrier and any preservatives, buffers, or propellants that may be required.
- the compounds of the present invention may be administered alone or in combination with other pharmaceutically acceptable therapeutic agents.
- a safe and effective amount of the antibody conjugate of the present invention is applied to a mammal (e.g., a human) in need of treatment, wherein the dosage is a pharmaceutically effective dosage.
- a mammal e.g., a human
- the daily dosage is generally 1 to 2000 mg, preferably 5 to 500 mg.
- the specific dosage should also take into account factors such as the route of administration and the patient's health condition, all of which are within the skill of a skilled physician.
- the monomer ratio of the conjugate was detected by SEC-HPLC and was within the normal range (purity >90%).
- the antibody-drug conjugate prepared by the novel linker of the present invention had good solubility and drugability, and no precipitation occurred during the conjugation process.
- the linker of the antibody-drug conjugate of the present invention has good solubility, which can greatly improve the water solubility of existing small molecule compounds and improve the stability and homogeneity of the conjugate after conjugation with the antibody.
- the conjugates prepared with the linkers of the present invention have excellent therapeutic effects in various in vitro and in vivo efficacy models, and are superior to the conjugate drugs prepared by the prior art.
- the LogS parameters of compound 11 and compound A1 were calculated and compared using PerkinElmer CHEMDRAW 22.2 software.
- the LogS of compound 11 was -10.02, and that of compound A1 was -5.756, indicating that the water solubility was improved by nearly 4-5 orders of magnitude.
- aqueous phase was adjusted to acidic pH with aqueous citric acid and extracted with ethyl acetate (50 mL x 3).
- the organic phase was washed with saturated brine, dried over anhydrous sodium sulfate, and evaporated under reduced pressure to obtain crude compound 3 (3.0 g) as a colorless liquid.
- LCMS (ESI) [M+Na] + 311.1.
- the LogS parameters of compound 15 and compound A2 were calculated and compared using PerkinElmer CHEMDRAW 22.2 software.
- the LogS of compound 11 was -11.14, and that of compound A2 was -6.926, indicating that the water solubility was increased by nearly 4 orders of magnitude.
- the heavy chain of the monoclonal antibody HuSC1-39 targeting TF (from WO2018/036117Al) is shown in SEQ ID NO.10, and the light chain is shown in SEQ ID NO.11.
- the nanoantibody-FC fusion protein targeting TF is 4A02-FCWT (wherein the CDR sequences are shown in SEQ ID NO.1-3, the VHH sequence is shown in SEQ ID NO.4, and the 4A02-FCWT fusion protein sequence is shown in SEQ ID NO.5).
- the antibody stock solution was replaced with 50mM PB/1.0mM EDTA buffer (pH 7.0) using a G25 desalting column, 8 equivalents of TECP were added, and the solution was stirred at 37°C for 2 hours to completely open the disulfide bonds between the antibody chains.
- the pH of the reduced antibody solution was then adjusted to 6.0 using phosphoric acid, and the water bath temperature was lowered to 25°C in preparation for the coupling reaction.
- the linker-drug conjugates prepared according to the methods of Examples 1 and 2 were dissolved in DMA, and 12 equivalents of the linker-drug conjugate were added dropwise to the reduced antibody solution. DMA was then added to a final concentration of 10% (V/V). The reaction was stirred at 25°C for 0.5 hours.
- the sample was filtered using a 0.22um membrane. Excess conjugated small molecules were purified using a tangential flow ultrafiltration system.
- the DAR values of the HuSC1-39 conjugate ADC are all between 7 and 8, and the DAR values of the 4A02-FCWT conjugate NDC are all between 3.9 and 4.
- the DAR values are determined by HIC-HPLC, RP-HPLC, or LCMS.
- the polymer ratio of the conjugates detected by SEC-HPLC is within the normal range (purity is >90%), indicating that the antibody-drug conjugates of the present invention have good solubility and drugability, and no precipitation occurs during the coupling process.
- Table 1 summarizes the preparation results of four TF-ADCs and TF-NDCs.
- the TF-targeted humanized nanoantibody-FC fusion protein 4A02-HM8-FCWT (codenamed FD40, sequence shown in SEQ ID NO. 6) was used to carry out coupling reaction with FD-LP1, FD-LP5, and FD-LP6 according to Example 6, and the conjugate was purified and the DAR value was analyzed and detected.
- the DAR values of the 4A02-HM8-FCWT (FD40) conjugate NDC were all between 3.6 and 3.9.
- the DAR values were determined using HIC-HPLC, RP-HPLC, or LCMS.
- the polymer ratio of the conjugates detected by SEC-HPLC was within the normal range (purity >90%), indicating that the antibody-drug conjugates of the present invention have good solubility and drugability, and no precipitation occurred during the conjugation process.
- Table 2 summarizes the preparation results of the three TF-NDCs.
- the HER2-targeting nanobody-FC fusion protein 1-G07-FCWT (sequence shown in SEQ ID NO. 7) or the humanized HER2 nanobody-FC fusion proteins 1-G07-HM1-FCWT and 1-G07-HM3-FCWT (sequence shown in SEQ ID NO. 8 and SEQ ID NO. 9) were conjugated with FD-LP5 according to Example 6. The conjugates were purified and the DAR values were analyzed. Table 3 shows the preparation results of the HER2-Topo1 inhibitor NDC.
- the cell lines used in the examples include triple-negative breast cancer HCC1806 and MDA-MB-231, and pancreatic cancer cell lines BxPC-3 and HPAF-II. These were purchased from the American Type Culture Collection (ATCC) and the Cell Bank of the Chinese Academy of Sciences, respectively, and cultured according to the corresponding instructions. Cryopreserved human peripheral blood mononuclear cells (PBMCs) were provided by Jiangsu Xidier Biotechnology Co., Ltd.
- PBMCs peripheral blood mononuclear cells
- HuSC1-39, 4A02-FCWT, HuSC1-39-L1-AN014, and 4A02-FCWT-L1-AN014 were all diluted at a starting concentration of 150 ⁇ g/mL, while AN014 and diABZI were diluted at a starting concentration of 1000 nM.
- Serial dilutions of the test drugs were then added to the 96-well plates. After culturing in a 37°C incubator for an appropriate period of time, the cell supernatant was collected and the survival rate of tumor cells was detected using a firefly luciferase reporter gene detection kit or MTS reaction solution (MTS powder was purchased from Promega, product number G1111; PMS powder was purchased from Sigma, product number P9625).
- MTS reaction solution MTS reaction solution
- CXCL10 and Interferon- ⁇ are classic markers of STING pathway activation
- the expression levels of CXCL10 (Product No. EK168, Lianke Bio) and Interferon- ⁇ (Product No. EK180, Lianke Bio) in the supernatant of the above co-cultured cells were detected by ELISA kits to evaluate the activation effect of TF-STING ADC/NDC on the STING pathway.
- TF-STING ADC/NDC also demonstrated strong anti-tumor activity when co-cultured with pancreatic cancer BxPC-3 cells and human PBMCs for 48 hours.
- Figure 2A demonstrates that the EC50 for killing BxPC-3 cells was ⁇ 0.0002nM and ⁇ 0.0004nM.
- Figure 2B demonstrates that TF-STING ADC/NDC can strongly induce the secretion of Interferon- ⁇ , with EC50 values of approximately 1.12nM and 1.21nM.
- TF-STING ADC/NDC showed stronger and more effective tumor killing activity than naked antibody.
- the killing EC50 for HCC1806 cells at 24 hours was 0.014-0.066 ⁇ g/mL ( Figure 3)
- the killing EC50 for MDA-MB-231 cells at 48 hours was approximately 0.0015 ⁇ g/mL ( Figure 4)
- the killing EC50 for HPAF-II cells at 72 hours was approximately 0.01 ⁇ g/mL ( Figure 5).
- HPAF-II cell line used in the Examples was purchased from the Cell Bank of the Chinese Academy of Sciences.
- the above-mentioned cells in the logarithmic growth phase were seeded into 96-well cell culture plates at a density of 1000-2000 cells per well. 150 ⁇ L/well was incubated at 37°C in 5% CO2 for approximately 5 hours. Then, different concentrations of TF-ADC/NDCs (15 ⁇ g/mL to 0.00019 ⁇ g/mL) were added. Two to four replicate wells were set up for each drug concentration, along with corresponding vehicle and blank control wells.
- the in vitro efficacy of the TF-KRAS G12D inhibitor ADC/NDC was verified using the KRAS G12D mutant pancreatic cancer HPAF-II cell line.
- MDA-453, HPAF-II, BxPC3, HCC1806, MDA-231, and NCI-H1373 cells in the logarithmic growth phase were seeded into 96-well cell culture plates at a density of 1000 to 3000 cells per well. 150 ⁇ L/well was cultured at 37°C, 5% CO2 for approximately 5 hours. Then, different concentrations of TF-NDC FD40-GGFG-Dxd, FD40-LP1, FD40-LP5, and FD40-LP6 (15 ⁇ g/mL to 0.00019 ⁇ g/mL) were added. After 6 days, the culture medium was decanted and MTS reaction solution (purchased from Promega, cat# G3581) was added. The cell viability (OD490nm) of each group was measured.
- Example 11 In vivo efficacy of TF nanobody-Topo1 inhibitor conjugates (TF-Topo1 inhibitor NDCs)
- TF-Topo1 inhibitor NDCs In vivo lung cancer NCI-H1373 model: 5x10 6 NCI-H1373 cells were inoculated onto the backs of 6-week-old Balb/c female nude mice. After tumors grew to ⁇ 200 mm 3 on day 8, the animals were randomly divided into groups, with 10 tumors per group. Dosing was performed twice weekly (days 8 and 15).
- FD40-LP5 (10 mg/kg, 5 mg/kg, and 2.5 mg/kg) demonstrated superior anti-tumor efficacy compared to 10 mg/kg FD40-GGFG-Dxd.
- TNBC HCC1806 model HCC1806 cells in logarithmic growth phase were seeded into the mammary pads of 6-week-old Balb/c female nude mice at a density of 3 ⁇ 106 cells per 200 ⁇ L of serum-free medium. After tumors grew to 200 mm3 , the animals were randomly divided into groups, with 10 tumors per group, and the drug was administered once. As shown in Figure 13, the groups treated with 10 mg/kg, 5 mg/kg, and 2.5 mg/kg of FD40-LP5 all showed excellent or good tumor therapeutic effects.
- NCI-N87 cells 2000 cells/well
- HCC1954 cells 1000 cells/well
- the cell viability (OD490nm) of each group was measured. The results are shown in Figure 14A (NCI-N87) and Figure 14B (HCC1954).
- NCI-N87 cells the IC50 values of 1-G07-LP5 and 1-G07-GGFG-Dxd were 1.064 ⁇ g/mL and ⁇ 10 ⁇ g/mL, respectively.
- HCC1954 cells the IC50 values of 1-G07-LP5 and 1-G07-GGFG-Dxd were 0.58 ⁇ g/mL and 1.39 ⁇ g/mL, respectively, indicating that the in vitro anti-tumor activity of 1-G07-LP5 is higher than that of 1-G07-GGFG-Dxd.
- Example 13 Therapeutic effects of HER2-NDC 1-G07-LP5 and TF-NDC FD40-LP5 in a nude mouse intracranial tumor model
- NCI-N87 intracranial model was established for testing 1-G07-LP5.
- NCI-N87-luc cells were resuspended in PBS and adjusted to a concentration of 1 ⁇ 10 8 /mL.
- 5 ⁇ L of cells (5 ⁇ 10 5 cells) were aspirated with a microinjector for inoculation.
- Six- to seven-week-old female Balb/c nude mice were selected, anesthetized with avertin, and fixed in a stereotaxic apparatus. Centered on the bregma of the mouse's head, the microinjection needle was moved 2 mm to the right and 0.6 mm upward.
- Drugs were administered via the tail vein, and a second dose was given one week apart, for a total of two doses. Every 1-2 weeks, in vivo fluorescence images were acquired using a small animal fluorescence/CT in vivo imaging system, and brain fluorescence signal intensity (Radiance (p/sec/cm 2 /sr)) and nude mouse body weight were calculated to plot tumor growth curves. The results are shown in Figure 16. Compared with the vehicle group, the T-Dxd group completely inhibited the growth of intracranial tumors, while the 1-G07-LP5 group caused almost complete regression of tumors, indicating a significantly better therapeutic effect than T-Dxd.
- HCC1806 intracranial model was established for the detection of FD40-LP5.
- In vivo fluorescence images were collected using a small animal fluorescence/CT in vivo imaging system every week, and the brain fluorescence signal intensity and nude mouse body weight were counted. The results are shown in Figure 17. Compared with the hIgG1-MMAE group, 5 mg/kg FD40-LP5 completely inhibited tumor growth or caused partial regression.
- Serum Sample Collection 8-week-old female Balb/c mice were injected via the tail vein with 1 mg/kg of HER2-NDC, 1-G07-GGFG-Dxd, or 1 mg/kg of 1-G07-LP5. Approximately 100 ⁇ L of blood was collected via the orbital cavity at 0, 5, 30, 4, 8, 24, 48, 72, 96, 120, 168, and 192 hours after administration. The blood was allowed to rest at room temperature for 30 minutes, then at 4°C for 3-4 hours. The supernatant serum was collected by centrifugation at 1500 rpm for 15 minutes.
- Anti-Dxd antibody (Abmax Biotechnology, Cat#05-0191-L, which has similar affinity for LP5 to Dxd) was diluted to 2.5 ⁇ g/mL using coating buffer and coated onto an ELISA plate at 100 ⁇ L/well. The plate was sealed with a sealing film and incubated at 4°C overnight. Unbound antigen was removed, and 3% BSA blocking buffer in PBS was added at 200 ⁇ L/well for 2 hours at room temperature. The blocking buffer was removed, and 3-fold serial dilutions of the test serum sample and a 3-fold serial dilution of the standard sample (starting at 333.33 ng/mL) were added at 100 ⁇ L/well for 2 hours at room temperature.
- 1-G07-GGFG and 1-G07-LP5 exhibited mean Cmax values of 18.6 ⁇ g/mL and 17.5 ⁇ g/mL, respectively.
- the mean T1 /2 values were 34.6 hours and 35.9 hours, respectively.
- the mean AUC0 -t values were 380.5 hours* ⁇ g/mL and 456.3 hours* ⁇ g/mL, respectively.
- the mean MRTlast values were 33.9 hours and 43.1 hours, respectively.
- Example 15 Permeability of TF-NDC FD40-LP5 and TF-ADC in an in vitro blood-brain barrier (BBB) model
- the cells used in this example were obtained from Wuhan Punosai Life Science Co., Ltd. and cultured according to the corresponding instructions, including C8-D1A and b.End3.
- a 6.5 mm diameter, 3 ⁇ m pore chamber (6.5 mm, Corning, Cat#3415) was coated with 100 ⁇ g/mL rat tail type I collagen at 37°C for 1 hour.
- Mouse brain astrocytes C8-D1A were resuspended in DMEM/F12 complete medium.
- the 24-well plate and chamber were inverted, and 50 ⁇ L of the C8-D1A cell suspension was added to the bottom of the chamber, with a final cell density of 1 ⁇ 10 5 cells/cm 2 .
- the bottom of the 24-well plate was covered as a lid and placed in an incubator for 3 hours.
- the chamber and 24-well plate were turned upright, the medium was replenished, and the culture was continued for 48 hours.
- Mouse microvascular endothelial cells b.End3 were resuspended in DMEM/F12 complete medium.
- Permeability test Remove the culture medium and add 700 ⁇ L of fresh culture medium to the bottom chamber. Add 100 ⁇ g/mL of different drugs to the top chamber and incubate in an incubator. At 6 and 24 hours, collect 120 ⁇ L of culture medium from the bottom chamber and replenish with 120 ⁇ L of fresh culture medium. For TF-NDC and TF-ADC drugs, determine antibody concentration using ELISA.
- FD40-LP5 was scaled up for batch production by optimizing the coupling reaction and conjugate purification conditions. 860 mg of FD40 antibody was used for the coupling reaction, with a TECP/antibody molar ratio of 2.8 and a LP5/antibody molar ratio of 7.0.
- the organic solvent, DMA was 10%. Reduction was performed at 22°C for 18 h, followed by coupling at 22°C for 0.5 h.
- the overall conjugate yield was 81%, with a DAR of 4.0, a monomer fraction of 97.39, and a residual small molecule fraction of ⁇ 0.06%.
- Figure 21 shows the SEC and LC-MS data for the scaled-up batch of FD40-LP5 conjugate.
- Two cynomolgus monkeys (one male and one female) were administered a single intravenous infusion of 10 mg/kg FD40-LP5 and observed for 21 consecutive days. On the 22nd day, they were given a second intravenous infusion of 30 mg/kg FD40-LP5 and observed for another 21 consecutive days (a total of 42 days). The results showed that at each dose, no significant drug-related changes in the animals' clinical status were observed, and slight and reversible fluctuations in food intake and body weight were observed.
- the body weight of the animals showed a slight and reversible decrease (5-10%) during the experimental period, especially at high doses.
- K2477 study Two cynomolgus macaques (one male and one female) were administered a single intravenous infusion of 10 mg/kg FD40-GGFG-Dxd (designated the 10 mg/kg dose group). On day 22, a second intravenous infusion of 30 mg/kg FD40-GGFG-Dxd (designated the 30 mg/kg dose group) was administered. Serum was prepared by collecting blood from the forelimb or hindlimb vein before each dose and at 5 minutes, 1 hour, 8 hours, 24 hours, 48 hours, 72 hours, 96 hours, 120 hours, 168 hours, 240 hours, 336 hours, and 504 hours after administration. Pharmacokinetic testing was performed according to the method in Example 14.
- Pharmacokinetic testing was performed according to the method of Example 14.
- the results, as shown in Figure 26, show that after intravenous administration of 10 mg/kg, the mean AUC 0-t values for FD40-GGFG-Dxd and FD40-LP5 were 4725.19 h* ⁇ g/mL and 7527.15 h* ⁇ g/mL, respectively.
- the mean AUC 0-t values for FD40-GGFG-Dxd and FD40-LP5 were 14822.3 h* ⁇ g/mL and 24615.3 h* ⁇ g/mL, respectively.
- the TF-STING ADC/NDC prepared using the new linker A of the present invention activates the STING signaling pathway in triple-negative breast cancer and pancreatic cancer models, promotes tumor-immune cell interaction, and induces the secretion of CXCL10 and IFN, thereby exerting excellent anti-tumor effects.
- the TF-KRAS G12D -I ADC/NDC prepared using the novel linker A of the present invention has a good anti-tumor effect in a KRAS G12D mutant pancreatic cancer model.
- the TF-Topo1 inhibitor NDC prepared using the new linker A of the present invention has good anti-tumor effects in KRAS G12C mutation lung cancer model, KRAS G12D mutation pancreatic cancer model and triple-negative breast cancer model.
- the HER2-Topo1 inhibitor NDC prepared using the new linker A of the present invention has a good anti-tumor effect in a gastric cancer model and is superior to trastuzumab-deruxtecan (T-Dxd).
- TF-NDC and HER2-NDC prepared with the new linker A have good BBB penetration, have good anti-tumor effects on intracranial tumors, and are superior to trastuzumab-deruxtecan (T-Dxd).
- the new linker A of the present invention has a wide range of applications and is suitable for coupling antibodies and nanobodies with different targets, as well as loaded compounds with different mechanisms of action.
- FD40-LP5 prepared using the novel linker A of the present invention has extremely high drugability and exhibits excellent water solubility, homogeneity, repeated freeze-thaw stability, and thermal stability.
- FD40-LP5 prepared using the new linker A of the present invention showed good safety in an exploratory toxicology evaluation study in crab-eating monkeys.
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Abstract
Description
Claims (18)
- 一种化合物或其立体异构体或其药学上可接受的盐,所述化合物具有如式A所示的结构:
式中,Q为用于与抗体进行连接的接头基团;Z1包含含有Y个羟基的葡萄糖基;s为0-10的整数;n为1-24的整数;r为0-10的整数;X为连接基团;P1为多肽残基;P2为化学键或AA-PAB结构;其中,AA为二肽或三肽或四肽片断(即2-4个氨基酸通过肽键连接形成的片段),PAB为对-氨基苄基氨甲酰基;D为药物。 - 根据权利要求1所述化合物或其立体异构体或其药学上可接受的盐,其特征在于,所述接头基团Q选自:
其中A表示任选取代的C3-C8亚烷基、C3-C8链烯基、C3-C8炔基、C3-C6环烯基、C3-C8环烷基、任选取代的二甘醇至八甘醇酰基,Ar表示任意取代的C5-C6芳基或杂芳基基团,“*”表示-C=O-与氨基形成酰氨键。 - 根据权利要求1所述化合物或其立体异构体或其药学上可接受的盐,其特征在于,所述P1选自下组:
NH-Val-Cit-C=O、NH-Val-Ala-C=O、NH-Ala-Ala-Ala-C=O、NH-Ala-Ala-C=O、
NH-Gly-Gly-Phe-Gly-C=O、NH-Val-Lys-C=O。 - 根据权利要求1所述化合物或其立体异构体或其药学上可接受的盐,其特征在于,所述X选自
- 如权利要求1所述化合物或其立体异构体或其药学上可接受的盐,其特征在于,所述Z1的结构选自下组:
- 根据权利要求1所述化合物或其立体异构体或其药学上可接受的盐,其特征在于,所述D为细胞毒类小分子药物,选自下组:STING激动剂、KRAS-G12D抑制剂、微管蛋白抑制剂、拓扑异构酶抑制剂、DNA结合剂。
- 如权利要求1所述化合物或其立体异构体或其药学上可接受的盐,其特征在于,所述式A的结构选自下组:
- 一种抗体药物偶联物(ADC),其特征在于,所述的抗体药物偶联物为如权利要求1所述的式A化合物与抗体偶联形成的抗体药物偶联物(ADC)。
- 如权利要求8所述抗体药物偶联物,其特征在于,所述偶联物如式B所示:
其中:Ab为抗体;L为连接子;D为药物;n为1至10的整数或小数。 - 如权利要求8所述抗体药物偶联物,其特征在于,所述抗体包括抗原结合片段、纳米抗体、嵌合抗体、二价抗体、和/或多价抗体。
- 如权利要求8所述抗体药物偶联物,所述抗体或纳米抗体或其融合蛋白靶向选自下组的靶点:TF、HER2、EGFR、HER3、BCMA、B7-H3、CD73、AXL、DLL3、CD38、CD123、CD19、CD20、CD22、B7-H6、GPC3、PMSA、CD28、4-1BB、OX40、CD40、CD27、CD3、CTLA4、PD1、PDL1、BCMA、Trop2、TIGIT、LAG-3、TLR7,或其组合。
- 如权利要求8所述抗体药物偶联物,所述抗体为靶向TF的抗体或纳米抗体或其融合蛋白。
- 如权利要求12所述抗体药物偶联物,所述靶向TF纳米的抗体或纳米抗体的抗原结合片段具有如SEQ ID NO.1所示的CDR1、如SEQ ID NO.2所示的CDR2、如SEQ ID NO.3所示的CDR3。
- 一种抗体药物偶联物,其特征在于:所述抗体药物偶联物包含式(B)所示结构:
其中:其中Q为可与抗体偶联的接头基团;Z1为亲水性基团,包括羟基,含有氨基的葡萄糖基;X为连接基团;P1为多肽残基;P2为直接键或对氨基苯甲酸酯(PABC)基团;D为抗肿瘤药物;n为1~24的整数,Ab为抗体或纳米抗体融合蛋白,m=1-8。 - 一种药物组合物,其包括(a)如权利要求8或14所述的抗体药物偶联物或其药学上可接受的盐,和(b)药学上可接受的载体或赋形剂。
- 一种如权利要求8或14所述的抗体药物偶联物或其药学上可接受的盐,或者包含所述的偶联物或其药学上可接受的盐的药物组合物在制备抗肿瘤或治疗癌症的药物中的用途。
- 如权利要求16所述的用途,其特征在于,所述的癌症选自下组:肺癌、肝癌、乳腺癌、卵巢癌、非霍奇金淋巴瘤,霍奇金淋巴瘤,急性淋巴细胞性白血病,间变性大细胞淋巴瘤,多发性骨髓瘤,前列腺癌、非小细胞肺癌、小细胞肺癌、恶性黑色素瘤、鳞状细胞癌、胶质母细胞瘤、肾细胞癌、胃肠道肿瘤、胰腺癌、结直肠癌、胃癌、神经胶质瘤、间皮瘤。
- 权利要求8或14所述的抗体药物偶联物的制备方法,其特征在于,包括步骤:(1)用抗体与还原试剂在缓冲液中反应,得到经还原后的抗体;(2)用式A所示化合物与步骤(1)中得到的经还原后的抗体在缓冲液与有机溶剂混合液中进行交联(偶联),得到抗体-药物偶联物B。
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4816397A (en) | 1983-03-25 | 1989-03-28 | Celltech, Limited | Multichain polypeptides or proteins and processes for their production |
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2025
- 2025-04-01 CN CN202580000932.2A patent/CN121079107A/zh active Pending
- 2025-04-01 AU AU2025251805A patent/AU2025251805A1/en active Pending
- 2025-04-01 WO PCT/CN2025/086645 patent/WO2025209482A1/zh active Pending
- 2025-04-01 EP EP25781875.7A patent/EP4732851A1/en active Pending
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| AU2025251805A1 (en) | 2026-02-19 |
| EP4732851A1 (en) | 2026-04-29 |
| CN121079107A (zh) | 2025-12-05 |
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