Ansatrienin B, also known as Mycotrienin II and Antibiotic T 23II, was isolated from a Streptomyces sp.. Closely related to the cytotrienins and trienomycins, it displays potent activity against tumour cell lines and inhibits osteoclastic bone resorption. Ansatrienin B also significantly potentiates the action of several clinical anti-cancer agents.
1) Sugita et al. (1982), Studies on mycotrienin antibiotics, a novel class of ansamycins. II. Structure elucidation and biosynthesis of mycotrienins I and II; J. Antibiot. (Tokyo), 35 1467
2) Feuerbach et al. (1995), Mycotrienins. A new class of potent inhibitors of osteoclastic bone resorption; J. Biol. Chem., 270 25949
3) Yamada et al. (2011), Mycotrienin II, a translation inhibitor that prevents ICAM-1 expression induced by pro-inflammatory cytokines; J. Antibiot. (Tokyo), 64 361
