Abstract

Provided is a camptothecin compound, which is a compound represented by structural formula I or a pharmaceutically acceptable salt, stereoisomer, solvate or prodrug thereof. An antibody-drug conjugate comprising the camptothecin compound is also provided. Provided is a camptothecin compound, which is a compound represented by structural formula I or a pharmaceutically acceptable salt, stereoisomer, solvate or prodrug thereof. An antibody-drug conjugate comprising the camptothecin compound is also provided.

IPC Classes  ?

• C07D 491/22 - Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups , , or in which the condensed system contains four or more hetero rings
• A61K 31/4745 - QuinolinesIsoquinolines ortho- or peri-condensed with heterocyclic ring systems condensed with ring systems having nitrogen as a ring hetero atom, e.g. phenanthrolines
• A61K 31/506 - PyrimidinesHydrogenated pyrimidines, e.g. trimethoprim not condensed and containing further heterocyclic rings
• A61K 31/5377 - 1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
• A61K 47/54 - Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additivesTargeting 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 organic compound
• A61P 35/00 - Antineoplastic agents
• C07D 495/22 - Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms in which the condensed system contains four or more hetero rings

Abstract

A pharmaceutical composition containing an anti-Nectin4 antibody-drug conjugate and an anti-PD-1 antibody and a use thereof in preventing or treating cancer. The pharmaceutical composition has good safety, and has a stronger anti-tumor effect than using a drug alone. The pharmaceutical composition shows a synergistic tumor inhibitory effect. The present invention also relates to a kit of parts containing the pharmaceutical composition.

IPC Classes  ?

• A61K 45/06 - Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
• A61K 47/68 - Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additivesTargeting 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
• A61K 39/395 - AntibodiesImmunoglobulinsImmune serum, e.g. antilymphocytic serum
• A61K 39/00 - Medicinal preparations containing antigens or antibodies
• A61P 35/00 - Antineoplastic agents

Abstract

The present invention relates to a method for preparing an antibody-drug conjugate. According to the method, a highly homogeneous antibody conjugate molecule is obtained by means of a specific chemical site-directed conjugation method, and the proportion of a DAR2 main peak thereof reaches 99% or above. The preparation method of the present invention has few steps, and is easy to operate, and is thus beneficial for industrial scaled-up production. In addition, the prepared product has few impurities and a high purity, the medication safety is obviously improved, and the production cost is also reduced.

IPC Classes  ?

• A61K 47/68 - Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additivesTargeting 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
• C07K 16/00 - Immunoglobulins, e.g. monoclonal or polyclonal antibodies
• C07K 16/28 - Immunoglobulins, e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
• C07K 1/20 - Partition-, reverse-phase or hydrophobic interaction chromatography
• A61K 39/395 - AntibodiesImmunoglobulinsImmune serum, e.g. antilymphocytic serum

Abstract

Provided are an antibody and an antigen-binding fragment that specifically bind to Nectin-4, and a test kit containing the antibody or antigen-binding fragment. Also provided are a nucleic acid encoding the antibody, a host cell containing the nucleic acid, and a method for preparing the antibody. Also provided are uses of the antibody specifically binding to Nectin-4 in diagnosis and prognosis.

IPC Classes  ?

• C07K 16/28 - Immunoglobulins, e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
• C07K 16/30 - Immunoglobulins, e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants from tumour cells
• C12N 15/63 - Introduction of foreign genetic material using vectorsVectorsUse of hosts thereforRegulation of expression
• C12N 5/10 - Cells modified by introduction of foreign genetic material, e.g. virus-transformed cells
• G01N 33/53 - ImmunoassayBiospecific binding assayMaterials therefor
• G01N 33/574 - ImmunoassayBiospecific binding assayMaterials therefor for cancer
• G01N 33/577 - ImmunoassayBiospecific binding assayMaterials therefor involving monoclonal antibodies
• A61K 39/00 - Medicinal preparations containing antigens or antibodies

Abstract

A series of novel anti-B7-H3 antibodies. The antibodies have high affinity to B7-H3 and have stable structures. Also provided is an antibody drug conjugate prepared by using said antibody. The antibody drug conjugate uses a camptothecin compound having a specific structure as a toxic molecule, has significant tumor inhibition activity, and has a bystander killing effect.

IPC Classes  ?

• A61K 47/68 - Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additivesTargeting 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
• C07D 491/22 - Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups , , or in which the condensed system contains four or more hetero rings
• A61P 35/00 - Antineoplastic agents

Abstract

A method for synthesizing 5,8-diamino-3,4-dihydro-2H-1-naphthalenone (Compound I), which method comprises: subjecting 2,5-diprotected aminophenylbutyric acid to the Friedel-Crafts reaction for ring closure, and then removing a protecting group on the amino group to obtain Compound I.

IPC Classes  ?

• C07C 227/44 - StabilisationUse of additives
• B01J 27/125 - HalogensCompounds thereof with scandium, yttrium, aluminium, gallium, indium or thallium
• B01J 27/16 - PhosphorusCompounds thereof containing oxygen
• B01J 31/22 - Organic complexes
• B01J 31/24 - Phosphines
• C07C 221/00 - Preparation of compounds containing amino groups and doubly-bound oxygen atoms bound to the same carbon skeleton
• C07C 227/06 - Formation of amino groups in compounds containing carboxyl groups by addition or substitution reactions, without increasing the number of carbon atoms in the carbon skeleton of the acid
• C07C 229/54 - Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton with amino and carboxyl groups bound to carbon atoms of the same non-condensed six-membered aromatic ring
• C07C 233/83 - Carboxylic acid amides having carbon atoms of carboxamide groups bound to carbon atoms of six-membered aromatic rings having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by carboxyl groups with the substituted hydrocarbon radical bound to the nitrogen atom of the carboxamide group by an acyclic carbon atom of an acyclic saturated carbon skeleton

Abstract

An antibody-drug conjugate targeting a poliovirus receptor-like molecule 4 (Nectin-4). The antibody-drug conjugate can be used for preparing a drug for treating Nectin-4-related diseases. The antibody-drug conjugate has strong targeting properties to Nectin-4 and a strong endocytosis effect via the target, and has an excellent tumor-killing effect.

IPC Classes  ?

• A61K 47/68 - Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additivesTargeting 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
• A61P 35/00 - Antineoplastic agents

Goods & Services

Medicines for human purposes; biological preparations for medical purposes; pharmaceutical preparations; biochemical drugs; dietetic foods adapted for medical purposes; depuratives; medicines for veterinary purposes; preparations for destroying vermin; medical dressings; dental abrasives.

Abstract

The present invention provides a preparation containing an anti-Nectin-4 antibody drug conjugate (ADC) and a use thereof. The preparation comprises an ADC, a buffering agent and an excipient. The anti-Nectin-4 ADC in the preparation exists stably, proteins do not aggregate after long-term storage, small molecule drugs are not prone to becoming detached, the osmotic pressure of the preparation is close to isotonic, and targeted therapy of Nectin-4 related diseases is facilitated.

IPC Classes  ?

• A61K 47/68 - Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additivesTargeting 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
• C07K 16/28 - Immunoglobulins, e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
• C12N 15/13 - Immunoglobulins
• A61K 39/395 - AntibodiesImmunoglobulinsImmune serum, e.g. antilymphocytic serum
• A61K 31/704 - Compounds having saccharide radicals attached to non-saccharide compounds by glycosidic linkages attached to a carbocyclic compound, e.g. phloridzin attached to a condensed carbocyclic ring system, e.g. sennosides, thiocolchicosides, escin, daunorubicin, digitoxin
• A61P 35/00 - Antineoplastic agents

Goods & Services

Medicines for human purposes; biological preparations for medical purposes; pharmaceutical preparations; biochemical drugs; dietetic foods adapted for medical purposes; depuratives; medicines for veterinary purposes; preparations for destroying vermin; medical dressings; dental abrasives.

Abstract

A preparation method for a bis-substituted bridging antibody-drug conjugate, comprising: hydrolyzing an antibody coupling product obtained by coupling an antibody to a compound as represented by formula I. Also provided is an antibody coupling product obtained by the preparation method. A preparation method for a bis-substituted bridging antibody-drug conjugate, comprising: hydrolyzing an antibody coupling product obtained by coupling an antibody to a compound as represented by formula I. Also provided is an antibody coupling product obtained by the preparation method.

IPC Classes  ?

• A61K 47/68 - Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additivesTargeting 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

Abstract

Provided is a camptothecin compound, which is a compound represented by structural formula I or a pharmaceutically acceptable salt, stereoisomer, solvate or prodrug thereof. An antibody-drug conjugate comprising the camptothecin compound is also provided.

IPC Classes  ?

• C07D 491/22 - Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups , , or in which the condensed system contains four or more hetero rings
• C07D 495/22 - Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms in which the condensed system contains four or more hetero rings
• A61K 47/68 - Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additivesTargeting 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
• A61P 35/00 - Antineoplastic agents

Abstract

Provided is a camptothecin compound, which is a compound represented by structural formula I or a pharmaceutically acceptable salt, stereoisomer, solvate or prodrug thereof. An antibody-drug conjugate comprising the camptothecin compound is also provided.

IPC Classes  ?

• A61K 47/68 - Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additivesTargeting 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
• C07D 491/22 - Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups , , or in which the condensed system contains four or more hetero rings
• C07D 495/22 - Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms in which the condensed system contains four or more hetero rings

Abstract

A method for synthesizing 5,8-diamino-3,4-dihydro-2H-1-naphthalenone (compound I), which method comprises: subjecting 2,5-diprotected aminophenylbutyric acid to the Friedel-Crafts reaction for ring closure, and then removing a protecting group on the amino group to obtain compound I.

IPC Classes  ?

• C07C 49/613 - Unsaturated compounds containing a keto group being part of a ring polycyclic
• C07C 13/28 - Polycyclic hydrocarbons or acyclic hydrocarbon derivatives thereof
• C07C 233/15 - Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by halogen atoms or by nitro or nitroso groups with the substituted hydrocarbon radical bound to the nitrogen atom of the carboxamide group by a carbon atom of a six-membered aromatic ring
• C07D 491/22 - Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups , , or in which the condensed system contains four or more hetero rings

Abstract

An antibody-drug conjugate targeting a poliovirus receptor-like molecule 4 (Nectin-4). The antibody-drug conjugate can be used for preparing a drug for treating Nectin-4-related diseases. The antibody-drug conjugate has strong targeting properties to Nectin-4 and a strong endocytosis effect via the target, and has an excellent tumor-killing effect.

IPC Classes  ?

• A61K 47/68 - Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additivesTargeting 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
• C07K 16/28 - Immunoglobulins, e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
• A61P 35/00 - Antineoplastic agents

Abstract

An antibody-drug conjugate targeting a poliovirus receptor-like molecule 4 (Nectin-4). The antibody-drug conjugate can be used for preparing a drug for treating Nectin-4-related diseases. The antibody-drug conjugate has strong targeting properties to Nectin-4 and a strong endocytosis effect via the target, and has an excellent tumor-killing effect.

IPC Classes  ?

• A61K 39/395 - AntibodiesImmunoglobulinsImmune serum, e.g. antilymphocytic serum
• A61K 47/68 - Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additivesTargeting 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
• C07K 16/28 - Immunoglobulins, e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
• C12N 5/10 - Cells modified by introduction of foreign genetic material, e.g. virus-transformed cells
• C12N 15/13 - Immunoglobulins
• C12N 15/85 - Vectors or expression systems specially adapted for eukaryotic hosts for animal cells

Abstract

Disclosed is an antibody-drug conjugate comprising an anti-CLDN18.2 antibody or an antigen-binding fragment thereof and use thereof. Further, also disclosed are a pharmaceutical composition comprising the antibody-drug conjugate and use of the antibody-drug conjugate and the pharmaceutical composition in the preparation of medicaments.

IPC Classes  ?

• A61K 47/68 - Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additivesTargeting 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
• A61K 45/00 - Medicinal preparations containing active ingredients not provided for in groups
• C07K 16/28 - Immunoglobulins, e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
• A61P 35/00 - Antineoplastic agents

Abstract

A preparation method for a bis-substituted bridging antibody-drug conjugate, comprising: hydrolyzing an antibody coupling product obtained by coupling an antibody to a compound as represented by formula I. Also provided is an antibody coupling product obtained by the preparation method.

IPC Classes  ?

• C07D 207/456 - Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having three double bonds between ring members or between ring members and non-ring members having two doubly-bound oxygen atoms directly attached in positions 2 and 5 with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to other ring carbon atoms
• C07D 401/14 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing three or more hetero rings
• A61K 31/537 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and at least one oxygen as the ring hetero atoms, e.g. 1,2-oxazines spiro-condensed or forming part of bridged ring systems
• A61P 35/00 - Antineoplastic agents
• C07K 5/027 - Peptides having up to four amino acids in a fully defined sequenceDerivatives thereof containing at least one abnormal peptide link in which at least a gamma-amino acid is involved, e.g. statine
• C07K 5/06 - Dipeptides

Abstract

The present invention relates to an antibody binding to human PD-1 or a fragment thereof, and a composition containing the anti-human PD-1 antibody or the fragment thereof, the composition preferably being an injection preparation. The anti-human PD-1 antibody performs screening by using a hybridoma technology to obtain an antibody molecule 317 having high affinity binding to both a human PD-1 extracellular region domain recombinant protein and a cell surface human PD-1 and capable of specifically blocking binding of receptors and ligands of PD-1/PD-L1 and PD-1/PD-L2, and a humanized antibody h317 having unchanged affinity and specificity is further obtained by means of a humanization technology is further obtained. According to structural analysis of an antigen-antibody compound crystal, mutants of h317 light and heavy chain CDR regions are constructed, so that a 317-series derivative antibody is obtained. On the basis of the anti-human PD-1 antibody h317, an antibody stabilized preparation provided by means of three rounds of component selection and concentration optimization improves the storage stability and temperature adaptability of the antibody, and prolongs the storage life of the antibody preparation especially an injection.

IPC Classes  ?

• C07K 16/28 - Immunoglobulins, e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
• C12N 15/13 - Immunoglobulins
• A61K 39/395 - AntibodiesImmunoglobulinsImmune serum, e.g. antilymphocytic serum
• A61P 35/00 - Antineoplastic agents

Abstract

Provided in the present invention are a di-substituted maleic amide linker conjugated to an antibody and a preparation method and use thereof. In particular, the present invention conjugates a strongly cytotoxic active substance to a biomacromolecule through a class of new linkers. The class of linkers can selectively act simultaneously with disulphide chains, so as to greatly improve the substance homogeneity of a conjugate. The conjugate prepared by the linker of the present invention has a high inhibitory activity on a cell strain expressing the corresponding antigen. Also provided is a method for preparing the above-mentioned conjugate and the use.

IPC Classes  ?

• A61K 31/4015 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil having oxo groups directly attached to the heterocyclic ring, e.g. piracetam, ethosuximide
• A61K 31/402 - 1-aryl-substituted, e.g. piretanide
• A61K 31/4025 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil not condensed and containing further heterocyclic rings, e.g. cromakalim
• A61K 31/5377 - 1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
• C07D 207/456 - Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having three double bonds between ring members or between ring members and non-ring members having two doubly-bound oxygen atoms directly attached in positions 2 and 5 with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to other ring carbon atoms
• C07D 401/12 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a chain containing hetero atoms as chain links
• C07D 401/14 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing three or more hetero rings
• C07D 403/12 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group containing two hetero rings linked by a chain containing hetero atoms as chain links
• C07D 403/14 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group containing three or more hetero rings
• C07D 413/12 - Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
• C07D 413/14 - Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing three or more hetero rings
• A61K 47/68 - Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additivesTargeting 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
• A61P 35/00 - Antineoplastic agents
• A61K 31/195 - Carboxylic acids, e.g. valproic acid having an amino group
• A61K 31/365 - Lactones
• A61K 31/40 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
• A61K 31/427 - Thiazoles not condensed and containing further heterocyclic rings
• A61K 31/437 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom ortho- or peri-condensed with heterocyclic ring systems the heterocyclic ring system containing a five-membered ring having nitrogen as a ring hetero atom, e.g. indolizine, beta-carboline
• A61K 31/454 - Non-condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems containing a five-membered ring with nitrogen as a ring hetero atom, e.g. pimozide, domperidone
• A61K 31/496 - Non-condensed piperazines containing further heterocyclic rings, e.g. rifampin, thiothixene or sparfloxacin
• A61K 31/5383 - 1,4-Oxazines, e.g. morpholine ortho- or peri-condensed with heterocyclic ring systems
• A61K 31/5517 - 1,4-Benzodiazepines, e.g. diazepam condensed with five-membered rings having nitrogen as a ring hetero atom, e.g. imidazobenzodiazepines, triazolam

Abstract

Provided in the present invention are a di-substituted maleic amide linker conjugated to an antibody and a preparation method and use thereof. The di-substituted maleic amide linker is represented by Formula la,(see formula Ia)wherein R is X or ArS-; X is selected from halogen, preferably bromine or iodine; Ar is selected from the group consisting of substituted or unsubstituted C6-C10 aryl and substituted or unsubstituted 5-12 membered heteroaryl; Ar' is selected from the group consisting of substituted or unsubstituted C6-C10 arylene, and substituted or unsubstituted 5-12 membered heteroarylene; L1 is -O(CH2CH2O)n- linked to Ar', in which n is any integer between 1 and 20.The class of linkers can selectively act simultaneously with disulphide chains, so as to greatly improve the substance homogeneity of a conjugate. Also provided are antibody drug conjugates using the di-substituted maleic amide linkers, compositions comprising the conjugates, uses thereof and methods of making thereof.

IPC Classes  ?

• A61K 31/5365 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and at least one oxygen as the ring hetero atoms, e.g. 1,2-oxazines ortho- or peri-condensed with heterocyclic ring systems
• A61K 47/68 - Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additivesTargeting 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
• A61P 35/00 - Antineoplastic agents
• C07D 207/456 - Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having three double bonds between ring members or between ring members and non-ring members having two doubly-bound oxygen atoms directly attached in positions 2 and 5 with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to other ring carbon atoms
• C07D 401/14 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing three or more hetero rings
• C07D 403/14 - Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group containing three or more hetero rings
• C07D 491/18 - Bridged systems
• C07D 519/00 - Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups or
• C07K 5/027 - Peptides having up to four amino acids in a fully defined sequenceDerivatives thereof containing at least one abnormal peptide link in which at least a gamma-amino acid is involved, e.g. statine
• C07K 7/02 - Linear peptides containing at least one abnormal peptide link