Provided are compositions and methods for treatment of tumors. The compositions comprises a fusion construct comprising single domain antibody (sdAb) that is specific for HER2, collagenase, and optionally, albumin binding domain. Methods are provided for increasing penetrability of tumors and inhibiting the growth of tumors comprising administering a fusion construct comprising anti-HER2 specific sdAb, collagenase, and optionally albumin binding domain, alone or in combination with and an anti-tumor agent.

As an antitumor drug which is excellent in terms of antitumor effect and safety and has an excellent therapeutic effect, there is provided an antibody-drug conjugate in which an antitumor compound represented by the following formula is conjugated to an anti-HER2 antibody via a linker having a structure represented by the following formula: -L.sup.1-L.sup.2-L.sup.P-NH—(CH.sub.2)n.sup.1-L.sup.a-(CH.sub.2)n.sup.2-C(═O)— wherein the anti-HER2 antibody is connected to the terminal L.sup.1, and the antitumor compound is connected to the carbonyl group of the —(CH.sub.2)n.sup.2-C(═O)— moiety with the nitrogen atom of the amino group at position 1 as the connecting position. ##STR00001##

The present invention provides a novel antibody-pyrrolodiazepine derivative and a novel antibody-pyrrolodiazepine derivative conjugate using the same, and a novel CLDN6 and/or CLDN9 antibody.

This invention describes a method of conjugating a cell binding agent such as an antibody with an effector group (e.g., a cytotoxic agent) or a reporter group (e.g., a radionuclide), whereby the reporter or effector group is first reacted with a bifunctional linker and the mixture is then used without purification for the conjugation reaction with the cell binding agent. The method described in this invention is advantageous for preparation of stably-linked conjugates of cell binding agents, such as antibodies with effector or reporter groups. This conjugation method provides in high yields conjugates of high purity and homogeneity that are without inter-chain cross-linking and inactivated linker residues.

The invention provides anti-HER2 antibodies and immunoconjugates and methods of using the same.

The present invention relates to novel binder-prodrug conjugates (APDCs) where binders are conjugated with inactive precursor compounds of kinesin spindle protein inhibitors, and to antibody-drug conjugates ADCs and to processes for producing these APDCs and ADCs.

The present disclosure relates generally to antibody-drug conjugates comprising peptide-containing linkers and to methods of using these conjugates as therapeutics and/or diagnostics. Also disclosed herein are peptide-containing scaffolds useful to conjugate with a targeting moiety (e.g., an antibody), a drug, or both to produce the antibody-drug conjugates.

The invention relates to cytotoxic conjugates and antibody-drug conjugates, and to their use in therapy, in particular for treating HER2+ cancers.

A conjugate comprising the following topoisomerase inhibitor derivative (A*): where Y is H or F, with a single overall linker moiety connecting two topoisomerase inhibitor derivatives to a Ligand Unit, wherein the topoisomerase inhibitor derivatives are cleavable from the Ligand Unit. Also provided is A* with the linking unit attached, and intermediates for their synthesis.

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The present invention relates to an anti-tumor/anti-tumor-associated fibroblast (TAF)/anti-hapten trispecific antibody (TsAb). The anti-hapten domain enables TsAb to arm various hapten-conjugated anti-cancer drugs (nanocarrier drugs, small molecule drugs, protein drugs, and radioactive drugs). The anti-tumor domain enables TsAb-armed drugs to target tumor cells, while the anti-TAF domain enables the TsAb-armed drugs to target TAFs. The present invention allows the simultaneous killing of tumor cells and TAFs by various drugs through arming with TsAb.