Bisorbicillinol inhibits Lyn tyrosine kinase for allergic response on RBL-2H3 cells.


Department of Nutritional Science and Food Safety, Faculty of Applied Bio-Science, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan. Electronic address: [Email]


Bisorbicillinol, which is isolated from Trichoderma sp. USF2690, is an inhibitor of β-hexosaminidase release and tumor necrosis factor (TNF)-α, and Interleukin (IL)-4 secretion from rat basophilic leukemia (RBL-2H3) cells, with IC50 values of 2.8 μM, 2.9 μM and 2.8 μM respectively. We showed that the inhibitory mechanism of β-hexosaminidase release and TNF-α secretion involved inhibition of Lyn, a tyrosine kinase. The inhibitory activities of bisorbicillinol indicate that this compound is a new candidate anti-allergic agent.


Bisorbicillinol,Lyn,RBL-2H3 cells,TNF-α,β-Hexosaminidase,