在暴露于可纳之前和之后,Candida tropicalis形态表现出改变的细胞结构和基因表达
Murilo M Dos Santos1, Cássia M de Souza1, Luciana Furlaneto-Maia2
1Department of Microbiology, State University of Londrina, Londrina, Brazil.
Medical mycology
|November 6, 2024
概括
在Candida tropicalis中的表型切换改变了细胞结构和抗真菌药物敏感性. 可纳暴露进一步以形态型依赖的方式改变这些细胞变化.
科学领域:
- 医学真菌学 医学真菌学
- 细胞生物学 细胞生物学
- 抗微生物耐药性 抗微生物耐药性
背景情况:
- 热带菌 (Candida tropicalis) 呈现现型转换,影响抗真菌敏感性和毒性.
- 了解切换期间的细胞变化对于预测治疗结果至关重要.
研究的目的:
- 为了研究表型切换如何影响Candida tropicalis细胞结构.
- 为了确定可纳暴露是否会诱导依赖形态型的细胞变化.
主要方法:
- 与父母和交换的Candida tropicalis形态类型进行比较 (Crepe,RC).
- 评估了可纳的最小抑制度 (MIC50),细胞壁的多孔性,成分量化,细胞大小和ERG11/CDR1基因表达.
- 可纳暴露前后的评估变化.
主要成果:
- 交换菌株 (Crepe,RC) 的流可纳MIC50比父母菌株更高.
- 可纳暴露增加了父母和RC菌株的MIC50.
- 切换菌株表现出细胞壁孔隙的改变以及β-1,3-葡萄糖/胆含量.
- 在开关菌株中观察到ERG11和CDR1基因的差异表达.
结论:
- 现型切换显著改变了Candida tropicalis的细胞结构和可纳的敏感性.
- 可纳暴露会在不同的C. tropicalis形态类型中诱导明显的细胞适应.
- 这些发现凸显了Candida tropicalis中抗真菌耐药机制的复杂性.
相关概念视频
01:28Fungal Phylum Microsporidia
Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
01:15Antifungal Agents
Amphotericin B is a broad-spectrum antifungal agent that exploits structural differences between fungal and mammalian cell membranes. Its amphipathic structure—featuring a hydrophobic polyene-lactone ring and a hydrophilic region containing mycosamine and carboxylic acid groups—enables selective binding to ergosterol, a sterol predominantly found in fungal plasma membranes. This selective interaction underlies the drug’s antifungal activity, although weak binding to cholesterol contributes to...