Compounds useful as biologically active compounds are disclosed. The compounds have the following structure (I): ##STR00001##
or a stereoisomer, tautomer or salt thereof, wherein R.sup.1, R.sup.2, R.sup.3, L, L.sup.1, L.sup.2, L.sup.3, M and n are as defined herein. Methods associated with preparation and use of such compounds is also provided.

The present application relates to anthracycline derivatives and their use in forming conjugates with target-binding molecules, including but not limited to antibodies. Conjugates of target-binding molecules and anthracycline derivatives are also provided. Also provided are medical uses of and pharmaceutical compositions comprising the conjugates.

There is disclosed an antibody drug conjugate (ADC) having an IgG antibody that binds to a CD38 target conjugated at a Cys site in the hinge region of an IgG antibody. There is further disclosed a method for treating multiple myeloma comprising providing an effective amount of a CD38 ADC.

The present invention relates to a linker of the following formula (I) or a salt thereof: (I). The present invention relates to a linker-drug conjugate of the following formula (II) or a salt thereof: (II). The present invention relates also to a binding unit-drug corrugate, such as an antibody-drug conjugate, of the following formula (III) or (IV) or a salt thereof: (III), (IV), as well as a pharmaceutical composition comprising such a binding unit-drug corrugate and its use in the treatment of cancer.

##STR00001##

Provided herein are activatable antibodies that when activated specifically bind to CD166 and conjugated activatable antibodies that specifically bind to CD166. Also provided are methods of making and using these activatable antibodies in a variety of therapeutic, diagnostic and prophylactic indications.

The invention provides anti-B7-H4 antibodies and immunoconjugates and methods of using the same.

The present disclosure provides conjugate structures and hydrazinyl-pyrrolo compound structures used to produce these conjugates. The disclosure also encompasses methods of production of such conjugates, as well as methods of using the same.

The invention provides methods of depleting CD5+ cells in human patients undergoing chimeric antigen receptor (CAR) immunotherapy in order to promote acceptance of CAR expressing immune cells. Anti-CD5 antibody drug conjugates (ADCs) are administered as a conditioning regimen to a human patient receiving autologous or allogeneic CAR expressing immune cells such that the CAR expressing immune cells are accepted by the human patient. Compositions and methods of the invention can be used in combination with CAR therapy to treat a variety of pathologies, including autoimmune diseases and cancer.

The present invention provides methods and compositions for treatment, screening, diagnosis and prognosis of cancer, such as lymphoma, myeloma, leukemia, thyroid cancer, bladder cancer, breast cancer, gastric cancer, esophagus cancer, head and neck cancer and skin cancer, for monitoring the effectiveness of cancer, such as lymphoma, myeloma, leukemia, thyroid cancer, bladder cancer, breast cancer, gastric cancer, esophagus cancer, head and neck cancer and skin cancer treatment, and for drug development.

The present invention relates to novel linkers containing a 2,3-disubstituted succinic group, or 2-monosubstituted, or 2,3-disubstituted fumaric or maleic (trans (E)- or cis (Z)-butenedioic), or acetylenedicarboxyl group for conjugation of a cytotoxic agent, and/or one or more different functional molecules per linker to a cell-binding molecule, through bridge linking pairs of thiols on the cell-binding molecule specifically. The invention also relates to methods of making such linkers, and of using such linkers in making homogeneous conjugates, as well as of application of the conjugates in treatment of cancers, infections and autoimmune disorders.