Glabridin is a natural isoflavan from Glycyrrhiza glabra, binds to and activates PPARγ, with an EC50 of 6115 nM. Glabridin exhibits antioxidant, anti-bacterial, anti-nephritic, anti-diabetic, anti-fungal, antitumor, anti-inflammatory, antiosteoporotic, cardiovascular protective, neuroprotective and radical scavenging activities[1][2].
Glabridin binds to and activates PPARγ, with an EC50 of 6115 nM[1].Glabridin (40, 80 μM) inhibits the proliferation of SCC-9 and SAS cell lines in a dose- and time-dependent manner after treatment for 24 and 48 h[2].Glabridin (0-80 μM) also induces apoptosis, causes Sub-G1 cell cycle arrest in SCC-9 and SAS cell lines[2].Glabridin (0, 20, 40, and 80 μM) dose-dependently activates caspase-3, −8, and −9 and increases PARP cleavage, significantly phosphorylates ERK1/2, JNK1/2, and p-38 MAPK in SCC-9 cells[2].
Glabridin (50 mg/kg, p.o. once daily) shows potent anti-inflammatory activity, ameliorates the inflammatory alterations induced by Dextran sodium sulphate (DSS) in rats[3].
References:
[1]. Rebhun JF, et al. Identification of glabridin as a bioactive compound in licorice (Glycyrrhiza glabra L.) extract that activates human peroxisome proliferator-activated receptor gamma (PPARγ). Fitoterapia. 2015 Oct;106:55-61.
[2]. Chen CT, et al. Glabridin induces apoptosis and cell cycle arrest in oral cancer cells through the JNK1/2 signaling pathway. Environ Toxicol. 2018 Jun;33(6):679-685.
[3]. El-Ashmawy NE, et al. Downregulation of iNOS and elevation of cAMP mediate the anti-inflammatory effect of glabridin in rats with ulcerative colitis. Inflammopharmacology. 2018 Apr;26(2):551-559.