Biricodar

**Semantic type:** Organic Chemical|Pharmacologic Substance

**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.

**Synonyms:** - BIRICODAR - VX-710