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Moderate granular positivity was observed in a few cases in most cancers, while several melanomas, liver and prostate cancers showed moderate positivity.
A few cases of thyroid, lymphomas, urothelial, renal, stomach, pancreatic and liver cancers displayed moderate cytoplasmic and nuclear positivity. Remaining cancers were weakly stained or negative.
GENE INFORMATION
Gene name
ABCC2 (HGNC Symbol)
Synonyms
CMOAT, cMRP, DJS, MRP2
Description
ATP-binding cassette, sub-family C (CFTR/MRP), member 2 (HGNC Symbol)
Entrez gene summary
The protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intra-cellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the MRP subfamily which is involved in multi-drug resistance. This protein is expressed in the canalicular (apical) part of the hepatocyte and functions in biliary transport. Substrates include anticancer drugs such as vinblastine; therefore, this protein appears to contribute to drug resistance in mammalian cells. Several different mutations in this gene have been observed in patients with Dubin-Johnson syndrome (DJS), an autosomal recessive disorder characterized by conjugated hyperbilirubinemia. [provided by RefSeq, Jul 2008]