MRP6/ABCC6 (D9D1F) Rabbit mAb #10666

The multidrug resistance-associated protein 6 (MRP6, ABCC6) is a member of ATP-binding cassette (ABC) family transporters that move drugs and hydrophobic compounds across cell membranes. The MRP6 protein is expressed mainly in liver and kidney, and in other tissues to a lesser extent (1). Identified MRP6 substrates include the glutathione conjugate of N-ethylmaleimide (NEM-GS) and leukotriene C4 (LTC4), with more tentative MRP6 substrates under investigation (2,3). Research studies show that increased MRP6 expression correlates with induced cholesterol biosynthesis, which suggests that MRP6 may be involved in lipid and cholesterol homeostasis (4). A small isoform of MRP6 is up-regulated in HBV infected hepatocytes and protects the cells from apoptosis mediated by caspase 3 and caspase 8 (5,6). Mutations in the corresponding ABCC6 gene cause pseudoxanthoma elasticum (PXE), an autosomal recessive disorder that is characterized by the accumulation of mineralized and fragmented elastic fibers in the skin, eyes, and arteries (7,8). Mutations in ABCC6 also result in generalized arterial calcification of infancy, an ectopic calcification disease that lies along a spectrum of similar disorders with PXE (9).