Borrelidin

Borrelidin (Treponemycin) is a bacterial and eukaryal threonyl-tRNA synthetase inhibitor which is a nitrile-containing macrolide antibiotic isolated from Streptomyces rochei[1]. Borrelidin is an inhibitor of Cdc28/Cln2 of the budding yeast, with an IC50 of 24 μM[2]. Borrelidin is a potent angiogenesis inhibitor, with an IC50 of 0.8 nM. Borrelidin induces apoptosis in the tube-forming cells[3]. Borrelidin has strong antimalarial activities, with IC50s of 1.9 nM and 1.8 nM against K1 and FCR3 strains of Plasmodium falciparum, respectively[4].

[1]Habibi D, et al. Borrelidin, a small molecule nitrile-containing macrolide inhibitor of threonyl-tRNA synthetase, is a potent inducer of apoptosis in acute lymphoblastic leukemia. Invest New Drugs. 2012 Aug;30(4):1361-70.|[2]Tsuchiya E, et al. Borrelidin inhibits a cyclin-dependent kinase (CDK), Cdc28/Cln2, of Saccharomyces cerevisiae. J Antibiot (Tokyo). 2001 Jan;54(1):84-90.|[3]Wakabayashi T, et al. Borrelidin is an angiogenesis inhibitor; disruption of angiogenic capillary vessels in a rat aorta matrix culture model. J Antibiot (Tokyo). 1997 Aug;50(8):671-6.|[4]Otoguro K, et al. In vitro and in vivo antimalarial activities of a non-glycosidic 18-membered macrolide antibiotic, borrelidin, against drug-resistant strains of Plasmodia. J Antibiot (Tokyo). 2003 Aug;56(8):727-9.