Sp1 dependent transcriptional regulation of G-protein coupled bile acid receptor Gpbar-1: role of Krüppel like factor 5

TGR5 (Gpbar-1) is a G-protein coupled bile acid receptor, which is highly expressed in cholangiocytes, liver sinusoidal endothelial cells, liver macrophages and CD14 positive monocytes of peripheral blood. TGR5-/- mice show impaired liver regeneration after partial hepatectomy and the increased inflammation in liver disease models, thus emphasizing a protective role of TGR5 in liver. While TGR5 functions are being studied extensively, little is known about the transcriptional regulation of this receptor. Aim: To investigate the mechanism and transcriptional regulation of TGR5. Methods: The potential TGR5 promote…