Steroidal saponin from Roezl modulates inflammatory response by inhibiting NF-κB and AP-1.

is an endemic succulent specie from the Oaxaca-Puebla area of Mexico. This plant is a medicinal recourse and contain a rich variety of saponins-type compounds with multiples biological effects. Some of them have been shown to be anticancer, antibacterial, or having anti-inflammatory and immunoregulation effects. This paper is the first scientific report to describe the pharmacological activity and chemistry of the saponin smilagenin-3-O-[β-D-glucopyranosyl (1→2)-β-D-galactopyranoside] (), isolated from Roezl. Saponin ( displayed immunomodulating activity when assayed on cultured macrophages. It inhibits NO production (EC = 5.6 mg/ml, E = 101%), as well as NF-κB expression (EC = 0.086 mg/ml, E = 90%). Using bioinformatic molecular docking, we identified a new smilagenin- PI3K kinase interaction site.