Design, synthesis, and biological evaluation of aminothiazole derivatives against the fungal pathogens Histoplasma capsulatum and Cryptococcus neoformans
作者:Ahmed Khalil、Jessica A. Edwards、Chad A. Rappleye、Werner Tjarks
DOI:10.1016/j.bmc.2014.12.006
日期:2015.2
Invasive fungal disease constitutes a growing health burden and development of novel antifungal drugs with high potency and selectivity against new fungal molecular targets are urgently needed. Previously, an aminothiazole derivative, designated as 41F5, was identified in our laboratories as highly active against Histoplasma yeast (MIC50 0.4-0.8 mu M) through phenotypic high-throughput screening of a commercial library of 3600 purine mimicking compounds (Antimicrob. Agents Chemother. 2013, 57, 4349). Consequently, 68 analogues of 41F5 were designed and synthesized or obtained from commercial sources and their MIC(50)s of growth inhibition were evaluated in Histoplasma capsulatum to establish a basic structure-activity-relationship (SAR) for this potentially new class of antifungals. The growth inhibiting potentials of smaller subsets of this library were also evaluated in Cryptococcus neoformans and human hepatocyte HepG2 cells, the latter to obtain selectivity indices (SIs). The results indicate that a thiazole core structure with a naphth-1-ylmethyl group at the 5-position and cyclohexylamide-, cyclohexylmethylamide-, or cyclohexylethylamide substituents at the 2-position caused the highest growth inhibition of Histoplasma yeast with MIC(50)s of 0.4 mu M. For these analogues, SIs of 92 to > 100 indicated generally low host toxicity. Substitution at the 3- and 4-position decreased antifungal activity. Similarities and differences were observed between Histoplasma and Cryptococcus SARs. For Cryptococcus, the naphth-1-ylmethyl substituent at the 5-position and smaller cyclopentylamide- or cyclohexylamide groups at the 2-position were important for activity. In contrast, slightly larger cyclohexylmethyl- and cyclohexylethyl substituents markedly decreased activity. (C) 2014 Elsevier Ltd. All rights reserved.
ANTI-MIGRATION AND ANTI-INVASION THIAZOLE ANALOGS FOR TREATMENT OF CELLULAR PROLIFERATIVE DISEASE
申请人:XAVIER UNIVERSITY OF LOUISIANA
公开号:US20150274714A1
公开(公告)日:2015-10-01
Thiazole analog compounds and their pharmaceutically acceptable salts are disclosed, including pharmaceutical compositions comprising the thiazole analog compounds, either alone or in combination with at least one additional therapeutic agent, and/or with a pharmaceutically acceptable carrier. Methods of using the thiazole analog compounds, either alone or in combination with at least one additional therapeutic agent, in the prophylaxis or treatment of cellular proliferative diseases, such as cancer, are also disclosed.
US9650369B2
申请人:——
公开号:US9650369B2
公开(公告)日:2017-05-16
Discovery of a Series of Thiazole Derivatives as Novel Inhibitors of Metastatic Cancer Cell Migration and Invasion
作者:Shilong Zheng、Qiu Zhong、Quan Jiang、Madhusoodanan Mottamal、Qiang Zhang、Naijue Zhu、Matthew E. Burow、Rebecca A. Worthylake、Guangdi Wang
DOI:10.1021/ml300322n
日期:2013.2.14
Effective inhibitors of cancercell migration and invasion can potentially lead to clinical applications as therapy to block tumor metastasis, the primary cause of death in cancer patients. To this end we have designed and synthesized a series of thiazolederivatives that showed potent efficacy against cell migration and invasion in metastatic cancercells. The most effective compound, 5k, was found