Solute carrier organic anion transporter family member 1A2 (OATP1A2) (OATP1A2)

Solute carrier organic anion transporter family member 1A2 (OATP1A2) is a membrane-bound uptake transporter encoded by the SLCO1A2 gene that plays a pivotal role in the pharmacokinetics of numerous drugs and endogenous compounds [1, 6]. It is strategically expressed on the apical membranes of enterocytes in the small intestine, the endothelial cells of the blood-brain barrier, and the distal tubules of the kidney, where it facilitates the sodium-independent influx of substrates into cells [3, 10, 12]. OATP1A2 transports a broad spectrum of molecules, including bile acids, steroid hormones, and clinically significant drugs such as fexofenadine, methotrexate, and various statins [6, 11]. Because it regulates drug absorption and tissue distribution, genetic polymorphisms in the SLCO1A2 gene can lead to significant variability in drug efficacy and toxicity among patients [10, 15]. Furthermore, OATP1A2 is often overexpressed in certain cancers, such as breast and prostate cancer, potentially contributing to tumor growth by mediating the uptake of hormones [14]. The transporter is also a site for significant drug-drug and food-drug interactions, notably being inhibited by components of grapefruit juice like naringin, which can reduce the bioavailability of its substrate drugs [1, 13].

Other names

SLCO1A2OATP-AOATP1SLC21A3Solute carrier family 21 member 3

OATP1A2 functions as a sodium-independent uptake transporter that mediates the cellular influx of organic anions through facilitated diffusion, likely utilizing an exchange mechanism with intracellular bicarbonate (HCO3-) or other counteranions [6, 12].