Thiazole compounds with activity against Cryptococcus gattii and Cryptococcus neoformans in vitro
摘要:
Human cryptococcosis can occur as a primary or opportunistic infection and develop as an acute, subacute, or chronic, systemic infection involving different host organs. We evaluated the antifungal activity of thirteen compounds against Cryptococcus gattii and Cryptococcus neoformans in vitro, by assessing the toxicity of the compounds showing the greatest antifungal activity in VERO cells and murine macrophages. From these results, four compounds were considered promising for further studies because they displayed low cytotoxicity and significant antifungal activity. The heterocyclic compounds 1b, 1c, 1d, and 1m have antifungal activity levels between that of amphotericin B and fluconazole in vitro. The death curve of Cryptococcus spp. treated with these four compounds was similar to the curve obtained for amphotericin B, in that we observed a significant reduction in cell viability within the first 24 h of treatment. Additionally, we found that there was no effect when these compounds were combined with amphotericin and fluconazole, except for 1c, which antagonized the effect of amphotericin B against C. gattii, also reflected in the reduction of the post-antifungal effect (PAFE); however, this interaction did not alter the ergosterol content. The results shown in this paper reveal the discovery of novel thiazole compounds, which are easy to synthesize, and with potentially exhibit antifungal activity, and display low cytotoxicity in normal mammalian cells. These compounds can be used as prototypes for the design of new antifungal drugs against C gattii and C neoformans. (C) 2015 Elsevier Masson SAS. All rights reserved.
Thiazole compounds with activity against Cryptococcus gattii and Cryptococcus neoformans in vitro
摘要:
Human cryptococcosis can occur as a primary or opportunistic infection and develop as an acute, subacute, or chronic, systemic infection involving different host organs. We evaluated the antifungal activity of thirteen compounds against Cryptococcus gattii and Cryptococcus neoformans in vitro, by assessing the toxicity of the compounds showing the greatest antifungal activity in VERO cells and murine macrophages. From these results, four compounds were considered promising for further studies because they displayed low cytotoxicity and significant antifungal activity. The heterocyclic compounds 1b, 1c, 1d, and 1m have antifungal activity levels between that of amphotericin B and fluconazole in vitro. The death curve of Cryptococcus spp. treated with these four compounds was similar to the curve obtained for amphotericin B, in that we observed a significant reduction in cell viability within the first 24 h of treatment. Additionally, we found that there was no effect when these compounds were combined with amphotericin and fluconazole, except for 1c, which antagonized the effect of amphotericin B against C. gattii, also reflected in the reduction of the post-antifungal effect (PAFE); however, this interaction did not alter the ergosterol content. The results shown in this paper reveal the discovery of novel thiazole compounds, which are easy to synthesize, and with potentially exhibit antifungal activity, and display low cytotoxicity in normal mammalian cells. These compounds can be used as prototypes for the design of new antifungal drugs against C gattii and C neoformans. (C) 2015 Elsevier Masson SAS. All rights reserved.
Computer-aided molecular design, synthesis and evaluation of antifungal activity of heterocyclic compounds
作者:Nereu Junio Cândido Oliveira、Iasmin Natália Santos Teixeira、Philipe Oliveira Fernandes、Gabriel Corrêa Veríssimo、Aline Dias Valério、Carolina Paula de Souza Moreira、Túlio Resende Freitas、Anna Clara Ventura Fonseca、Adriano de Paula Sabino、Susana Johann、Vinicius Gonçalves Maltarollo、Renata Barbosa de Oliveira
DOI:10.1016/j.molstruc.2022.133573
日期:2022.11
perspective, heterocycliccompounds namely thiazolylhydrazones, furan, tetrazole, triazole and thiadiazoline derivatives were synthesized and tested in vitro against seven clinical importance Cryptococcus and Candida species. In this study, virtual screening techniques were applied using a scaffold-hopping database, FDA approved drugs and a ZINC subset. Some of the compoundsevaluated showed promising