Neotuberostemonine

Neotuberostemonine is an alkaloid originally isolated from S. tuberosa that has diverse biological activities.{55083,55084,55085} It inhibits LPS-induced increases in inducible nitric oxide synthase (iNOS) protein levels and NO production in RAW 264.7 cells when used at a concentration of 100 µM.{55083} Neotuberostemonine (50 µM) inhibits RANKL-induced osteoclast differentiation of RAW 264.7 cells.{55084} It reduces the citric acid-induced cough reflex in conscious guinea pigs when administered at a dose of 133 µmol/kg.{55085} Neotuberostemonine (40 mg/kg) inhibits pulmonary collagen deposition and fibrosis, as well as bronchoalveolar lavage fluid (BALF) monocyte and lymphocyte infiltration in a mouse model of bleomycin-induced pulmonary fibrosis.{55083}