Synthesis of chimeric tetrapeptide-linked cholic acid derivatives: Impending synergistic agents
作者:Sudhir N. Bavikar、Deepak B. Salunke、Braja G. Hazra、Vandana S. Pore、Robert H. Dodd、Josiane Thierry、Fazal Shirazi、Mukund V. Deshpande、Sreenath Kadreppa、Samit Chattopadhyay
DOI:10.1016/j.bmcl.2008.09.013
日期:2008.10
Tetrapeptides derived from glycine and beta-alanine were hooked at the C-3 beta position of the modified cholic acid to realize novel linear tetrapeptide-linked cholic acid derivatives. All the synthesized compounds were tested against a wide variety of microorganisms (Gram-negative bacteria, Gram-positive bacteria and fungi) and their cytotoxicity was evaluated against human embryonic kidney (HEK293) and human mammary adenocarcinoma (MCF-7) cell lines. While relatively inactive by themselves, these compounds interact synergistically with antibiotics such as fluconazole and erythromycin to inhibit growth of fungi and bacteria, respectively, at 1-24 mu g/mL. The synergistic effect shown by our novel compounds is due to their inherent amphiphilicity. The fractional inhibitory concentrations reported are comparable to those reported for Polymyxin B derivatives. (c) 2008 Elsevier Ltd. All rights reserved.