NCIt definition : A pipecolinate derivative. Functioning as a modulator of P-glycoprotein (P-gp) and
multidrug resistance protein (MRP-1), biricodar restores drug sensitivity to cells
expressing P-glycoprotein and MRP1, the cellular efflux pumps that are the major causes
in tumor cell resistance to chemotherapeutic agents. This agent binds directly to
Pgp and MRP-1 and inhibits efflux pump activity, resulting in increased intracellular
accumulation and retention of cytotoxic agents.;