Next, to test the association of Ct-OATP1B3 mRNA expression with the differentiation status of colon cancer, the Ct-OATP1B3 mRNA levels between well-differentiated and moderately differentiated cancer tissues were compared (poorly differentiated and undifferentiated cancer tissues could not be obtained for use in this study). Here, SLCO1B3 is linked to malignant colon neoplasm.