NCIt definition : An immunoconjugate consisting of an anti-CD19 monoclonal antibody conjugated to the
maytansinoid DM4, a derivative of the cytotoxic agent maytansine (DM1), with potential
antineoplastic activity. Coltuximab ravtansine targets the cell surface antigen CD19,
found on a number of B-cell-derived cancers. Upon antibody/antigen binding and internalization,
the immunoconjugate releases DM4, which binds to tubulin and disrupts microtubule
assembly/disassembly dynamics, resulting in inhibition of cell division and cell growth
of CD19-expressing tumor cells.;