1,2,3,6-Tetragalloylglucose

1,2,3,6-Tetragalloylglucose (TEgG) is a competitive inhibitor of UDP-glucuronyltransferase UGT1A1, targeting the competitive substrate binding site of UGT1A1. 1,2,3,6-Tetragalloylglucose inhibits UGT1A1-mediated β-estradiol 3-glucuronidation and SN-38 glucuronidation with IC50 of 6.01 μM and 4.31 μM, respectively, and binds to UGT1A1 with Ki of 3.55 μM. 1,2,3,6-Tetragalloylglucose also induces tumor cell apoptosis, inhibit cell proliferation, activates caspase-3 and induces DNA fragmentation in HL-60 cells. 1,2,3,6-Tetragalloylglucose also inhibits HIV integrase and reverse transcriptase, and inhibits HCV protease[1][2][3].