SLC10A1 and Wilson disease: Among BAs transporters investigated, expression of Slc51b, the gene for organic solute transporter β (OSTβ), increased more than 5-fold with WD-CA (P<0.01), whereas expression of Slc10a1, the gene for sodium/bile acid cotransporter (NTCP), increased specifically with CD-CDCA (P<0.05).