Tenuigenin is a major active component isolated from the root of the Chinese herb Polygala tenuifolia. Tenuigenin protects against S.aureus-induced pneumonia by inhibiting NF-κB activation. Tenuigenin has anti-inflammatory effect^[1]. In Vivo: Tenuigenin (2, 4, 8 mg/kg) significantly attenuates S.aureus-induced lung histopathological changes. Tenuigenin also inhibits lung wet/dry (W/D) ratio, and inflammatory cytokines TNF-α and IL-1β production in Male BALB/c mice^[1].