ATP-binding cassette sub-family C member 4 (ABCC4), also known as the multidrug resistance-associated protein 4 (MRP4) or multi-specific organic anion transporter B (MOAT-B), is a protein that in humans is encoded by the ABCC4gene.[1][2]
ABCC4 acts as a regulator of intracellular cyclic nucleotide levels and as a mediator of cAMP-dependent signal transduction to the nucleus.[3] MRP4/ABCC4 also transports prostaglandins, for example PGE2, out of the cell where they can bind receptors.[4]
MRP4/ABCC4 expression is dysregulated in several cancers [5][6][7] and is also upregulated in peritoneal endometriosis.[8]
↑Reid G, Wielinga P, Zelcer N,van der Heijden I, Kuil A, de Haas M, et al. The human multidrug resistanceprotein MRP4 functions as a prostaglandin efflux transporter and is inhibitedby nonsteroidal antiinflammatory drugs" Proc Natl Acad Sci U S A2003;100(16) 9244-9.
↑Ho LL, Kench JG, Handelsman DJ,Scheffer GL, Stricker PD, Grygiel JG, et al. Androgen regulation of multidrugresistance-associated protein 4 (MRP4/ABCC4) in prostate cancer" Prostate2008;68(13) 1421-9.
↑Copsel S, Garcia C, Diez F,Vermeulem M, Baldi A, Bianciotti LG, et al. Multidrug resistance protein 4(MRP4/ABCC4) regulates cAMP cellular levels and controls human leukemia cellproliferation and differentiation" J Biol Chem 2011;286(9) 6979-88.
↑Holla VR, Backlund MG, Yang P,Newman RA, DuBois RN. Regulation of prostaglandin transporters in colorectalneoplasia. Cancer Prev Res (Phila). 2008;1(2) 93-9.
↑Gori I, Rodriguez Y, Pellegrini C, Achtari C, Hornung D, Chardonnens E, Wunder D, Fiche M, CannyGO. Augmented epithelial multidrug resistance-associated protein 4 expression in peritoneal endometriosis: regulation by lipoxin A(4)" Fertil Steril 2013 Jun;99(7) 1965-73.e2. doi:10.1016/j.fertnstert.2013.01.146
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