Estriol 3-β-D-glucuronide is a metabolite of estriol . It is formed from estriol by the UDP-glucuronosyltransferase (UGT) isoform UGT1A10. Estriol 3-β-D-glucuronide binds to basolateral and canalicular liver plasma membranes with Kd values of 85 and 164 μM, respectively. It competitively inhibits the hydrolysis of 4-methylumbelliferyl-β-D-glucuronide and is a substrate for hydrolysis by Klotho-human IgG1 Fc protein (KLFc).
Selaginellin has a neuroprotective effect against L-glutamate-induced neurotoxicity through mechanisms related to anti-oxidation and anti-apoptosis via scavenging reactive oxygen species and up-regulating the expression of klotho gene. Selaginellin shows