• OATP1B1 and OATP1B3 are mainly liver-specific transporters normally responsible for hepatic drug and solute uptake.
– Their downregulation in HCC is associated with a loss of normal liver function and may indicate poorer prognosis.
• OATP1B3 is also found to be aberrantly overexpressed in certain extrahepatic cancers, raising interest as a potential diagnostic or therapeutic marker.
• OATP2B1 is more broadly expressed and its dysregulation in cancers like colorectal and prostate cancer might impact tumor behavior and treatment response, although further studies are needed to validate its prognostic significance.
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