应力耐力和耐受性之间的权衡是对过氧化的适应性反应的基础
Basile Jacquel1, Bor Kavčič2, Théo Aspert1
1GMGM UMR 7156, Université de Strasbourg, CNRS, 67000 Strasbourg, France.
Cell systems
|July 21, 2025
概括
细胞通过抵抗或耐受性来适应环境压力. 在酸通路中删除一个关键酶意外地提高了耐受性,揭示了对理解细胞生存策略至关重要的权衡.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 遗传学 遗传学 是一个
背景情况:
- 对环境压力的生理适应涉及不同的分子反应:抗压 (维持繁殖) 和耐受 (优先考虑生存).
- 这些互补策略之间的协调,特别是在氧化应激期间,尚不清楚.
- 对于从基本生物学到治疗开发的各个领域来说,了解这种相互作用至关重要.
研究的目的:
- 调查抗压能力和耐受性之间的相互作用的遗传基础.
- 阐明协调这些适应策略的分子机制,以应对过氧化 (H2O2) 压力.
- 探索这些机制在其他生物体中的保存.
主要方法:
- 在芽酵母中利用微流体和活细胞成像技术观察细胞对H2O2.2.的反应.
- 采用了ZWF1基因的遗传删除,该基因通过酸通路 (PPP) 控制NADPH合成.
- 进行了基因和环境干预,以描述观察到的权衡,并对细菌的保存进行了测试.
主要成果:
- 删除ZWF1 (zwf1Δ) 降低了H2O2耐药性,但意外地提高了细胞耐受性.
- 通过酸路径介导的H2O2抵抗和耐受性之间的权衡被确定.
- 证明当恒温反应被压倒时,氧化还原信号通过蛋白激酶A抑制将细胞转移到依赖营养的耐受性状态.
- 在细菌模型中观察到这种耐药性-耐受性权衡的保存.
结论:
- 这项研究揭示了抗压能力和耐受性之间的新的权衡,由酸通路和氧化还原信号调节.
- 提出了一个模型,其中压倒性的H2O2稳态将细胞转移到依赖营养素的耐受性状态.
- 这一框架提供了关于通过向耐药性和耐受性机制来预防药物逃逸和疾病复发的见解.
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