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ATP-binding cassette subfamily C member 2
(ABCC2; protein name
multidrug resistance-associated protein 2, MRP2; also called
cMOAT) is an ATP-dependent membrane efflux transporter. It exports organic
anions, glutathione, glucuronide and sulfate conjugates, bilirubin conjugates,
and several therapeutic drugs from cells. In cancer,
ABCC2/MRP2 ↑ is commonly associated with increased
drug efflux, reduced intracellular drug accumulation, and chemotherapy
resistance. Conversely, ABCC2/MRP2 ↓ or transporter
inhibition generally increases intracellular drug exposure and may restore
treatment sensitivity. The direction should be interpreted according to the
cancer type and whether the administered drug is an ABCC2 substrate.
Gene reference;
Cancer drug-resistance review.
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