Aspergillus terreus 部门化:一种形态现象,揭示了安福特素B的抗药机制
David Eisele1, Michael Blatzer1,2,3, Anna Maria Dietl1
1Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria.
mBio
|February 25, 2025
概括
在Aspergillus terreus中分类导致对安福特素B (AmB) 的敏感性增加. P型ATPases和多基基合成酶基因与AmB耐药性和表型变化有关.
科学领域:
- 菌类学 菌类学是指菌类学.
- 分子生物学分子生物学
- 抗真菌耐药性 抗真菌耐药性
背景情况:
- 长时间种植像Aspergillus terreus这样的丝状真菌会导致退化和形态变化,导致部门化.
- 这些部门可能表现出改变的抗真菌敏感性,减少的化和二次代谢物生产的变化.
- 氨酸B (AmB) 是一种关键的抗真菌剂,了解耐药机制至关重要.
研究的目的:
- 描述一种抗AMB的野生型 (WT) Aspergillus terreus菌株与其抗AMB敏感的部门化衍生物 (ATSec) 之间的差异.
- 确定涉及AMB耐药性和易感性的基因和途径.
- 调查P型ATPases和多基化生物合成在观察到的表型变化的作用.
主要方法:
- 对WT和ATSec菌株的比较表征,包括抗真菌敏感性测试 (AmB),化,固醇含量和Galleria mellonella的毒性测试.
- 使用RNA测序进行基因表达分析,在不同的AMB治疗条件下比较WT和ATSec.
- 生物信息分析以识别突变和差异性基因表达模式,特别关注P型ATPase和多基合成酶基因.
主要成果:
- ATSec显示对AmB的敏感性增加,化减少,但对WT的类固醇含量和毒性相似.
- 与ATSec相比,AmB抗性WT菌株中P型ATPase相关基因的表达显著更高.
- 参与多基化生物合成的基因的上调调节在WT中更高,其中一些基因在ATSec中存在突变.
结论:
- P型ATPases在Aspergillus terreus菌株中观察到的AmB敏感性和耐药性中发挥着重要作用.
- 在分部门衍生物 (ATSec) 内的多基基因合成酶基因的突变可能会导致与分部门相关的表型变化.
- 了解这些遗传机制对于管理状真菌的抗真菌耐药性至关重要.
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