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Updated: Jul 2, 2025

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细胞散毒素调节细胞分化,并引起表皮细胞到介质细胞的过渡
Lamia Azzi-Martin1,2, Valentin Touffait-Calvez1, Maude Everaert1
1Bordeaux Institute of Oncology, UMR1312, INSERM, University of Bordeaux, Bordeaux, France.
The Journal of infectious diseases
|February 28, 2024
概括
细菌基因毒素,如细胞杀伤性扩张毒素 (CDT),激活上皮细胞转化为介质细胞转化 (EMT),这是癌症发病的关键过程. 这项研究证实了CDT.
科学领域:
- 微生物学 微生物学
- 癌症生物学 癌症生物学
- 分子生物学分子生物学
背景情况:
- 细菌基因毒素,如细胞杀伤性扩张毒素 (CDT),诱导DNA损伤,这是已知的癌症风险因素.
- CDT与类似于表皮细胞转移到介质细胞转变 (EMT) 的表型相关,这是癌症发展中至关重要的过程.
研究的目的:
- 研究Helicobacter hepaticus CDT及其CdtB子单元在诱导EMT中的作用.
- 探索CDT/CdtB触发EMT相关变化的分子机制.
主要方法:
- 使用了体内 (小鼠模型) 和体外 (上皮细胞培养) 系统.
- 分析了细胞-细胞结合完整性,EMT转录调节者的表达 (SNAIL,ZEB1),EMT标记物,矩阵金属蛋白酶和细胞迁移.
- 在Helicobacter hepaticus感染和异种移植的小鼠模型中证实了这些发现.
主要成果:
- 在小鼠和细胞培养模型中,CDT/CdtB诱导了EMT过程中的大多数步骤.
- CdtB 破坏了细胞-细胞结合,促进了细胞个性化和螺旋状形态.
- 在RNA和蛋白质水平上观察到SNAIL,ZEB1和EMT标记物的升级.
- 增加的矩阵金属蛋白酶活性和细胞迁移与CdtB相关.
- 来自大肠杆菌的科利巴克也在细胞培养中诱导了类似EMT的效应.
结论:
- 感染产生基因毒素的细菌会激活EMT过程.
- 这些发现支持细菌基因毒素在促进瘤发生中的作用.
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