Efficacy of nitrofuran derivatives against biofilms of Histoplasma capsulatum strains and their in vivo toxicity.

IF 2.5 4区 生物学 Q3 MICROBIOLOGY Future microbiology Pub Date : 2025-02-05 DOI:10.1080/17460913.2025.2457286
Carolina Orlando Vaso, Níura Madalena Bila, Rosângela Aparecida Moraes da Silva, Angélica Romão de Carvalho, Jennyfie Araújo Belizário, Fabiana Pandolfi, Daniela De Vita, Martina Bortolami, Maria José Soares Mendes-Giannini, Luigi Scipione, Roberto Di Santo, Roberta Costi, Caroline Barcelos Costa-Orlandi, Ana Marisa Fusco-Almeida
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引用次数: 0

Abstract

Aim: To evaluate the efficacy of two nitrofuran derivatives against biofilms formed by two strains of Histoplasma capsulatum and to study the toxicity of these compounds in alternative models: Caenorhabditis elegans, Galleria mellonella, and zebrafish.

Methods: The metabolic activity of biofilms was measured after treatment using the XTT reduction assay. Scanning electron microscopy (SEM) and confocal microscopy were used to observe damage to mature biofilms. Survival curves were generated for G. mellonella, while percentage survival was determined for C. elegans and zebrafish.

Results: The compounds showed efficacy against early and mature biofilms at concentrations equal to or up to two times higher than those required to eliminate planktonic fungal cells (3.90 to 31.25 μg/mL). Micrographs showed a reduction in metabolic activity, biofilm thickness, and extracellular matrix. In addition, the compounds showed little or no toxicity in alternative models, even at the highest concentrations tested.

Conclusion: These results are promising for the development of new therapeutic alternatives, especially for species, such as H. capsulatum, which are recognized as high-priority pathogens. Few studies have investigated resistance and antifungal treatment targeting biofilms of this species, making this work a relevant contribution to future approaches.

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来源期刊
Future microbiology
Future microbiology 生物-微生物学
CiteScore
4.90
自引率
3.20%
发文量
134
审稿时长
6-12 weeks
期刊介绍: Future Microbiology delivers essential information in concise, at-a-glance article formats. Key advances in the field are reported and analyzed by international experts, providing an authoritative but accessible forum for this increasingly important and vast area of research.
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