Background:

Deoxycholic acid is specifically responsible for activating the G protein-coupled bile acid receptor TGR5 that stimulates brown adipose tissue (BAT) thermogenic activity.

Deoxycholic acid (DCA) and chenoDeoxycholic acid (CDCA), as the common ingredients of duodenal reflux, act synergistically in many physiological and pathological processes. The cells are repeatedly exposed to 100 μM CDCA and Deoxycholic acid at pH 5.5 for up to 120 min. To simulate chronic local recurrent disease in vitro, the gastric cancer cell line MGC803 is exposed to acidified medium (pH 5.5) containing 100 μM Deoxycholic acid and CDCA. An untreated log-growth MGC803 cell line is generated to be used as a control in normal pH media. After daily 10 min exposure to the acidified bile acids for 60 weeks, MGC803-resistant cells are able to survive and proliferate after 120 min exposure[2].

[1]. Somm E, et al. β-Klotho deficiency protects against obesity through a crosstalk between liver, microbiota, and brown adipose tissue. JCI Insight. 2017 Apr 20;2(8). pii: 91809. [2]. Wang X, et al. Acidified bile acids enhance tumor progression and telomerase activity of gastric cancer in micedependent on c-Myc expression. Cancer Med. 2017 Apr;6(4):788-797.