Corylifol A inhibits IL-6-induced STAT3 activation and phosphorylation, with an IC50 of 0.81 μM.
Corylifol A shows an inhibitory effect on IL-6-induced STAT3 promoter activity in Hep3B cells with IC50 value of 0.81±0.15 μM, also inhibits STAT3 phosphorylation induced by IL-6 in Hep3B cells[1]. Corylifol A inhibits SARA PLpro in a dose-dependent manner with IC50s ranging between 4.2 and 38.4 μM[2]. Corylifol A is found to be a naturally occurring potent inhibitor of hCE2, with low Ki values ranging from 0.62 μM to 3.89 μM[3].
References:
[1]. Lee SW, et al. Phenolic compounds isolated from Psoralea corylifolia inhibit IL-6-induced STAT3 activation. Planta Med. 2012 Jun;78(9):903-6.
[2]. Kim DW, et al. Phenolic phytochemical displaying SARS-CoV papain-like protease inhibition from the seeds of Psoralea corylifolia. J Enzyme Inhib Med Chem. 2014 Feb;29(1):59-63.
[3]. Li YG, et al. Fructus Psoraleae contains natural compounds with potent inhibitory effects towards human carboxylesterase 2. Fitoterapia. 2015 Jan 13;101C:99-106. d