过渡形成的核-至-微管阵列以KIFC3-依赖的方式调解衰老的启动
Jielu Hao Robichaud1, Yingyi Zhang1, Chuan Chen1
1Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN, USA.
Nature communications
|September 12, 2024
概括
损坏的细胞通过KIFC3介导的FBF1沿着专门的微管阵列的运输启动衰老. 这一过程对于哺乳动物的压力诱导的细胞衰老至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 衰老研究 衰老研究
背景情况:
- 细胞衰老对人类健康至关重要,但在受损细胞中诱导衰老的机制尚未完全理解.
- 之前的研究已经确定了细胞白血病核体 (PML-NBs) 转移状FBF1对于衰老至关重要.
- 控制这种转移的精确分子路径仍然难以捉摸.
研究的目的:
- 阐明早期的细胞事件和在受压力哺乳动物细胞中诱导衰老的基础分子机制.
- 确定特定的微管结构和运动蛋白在关键衰老因子的运输中的作用.
主要方法:
- 观察压力诱导的微管子阵列 (sinc-MTs) 具有独特的多重胺和极性.
- 研究基因素KIFC3及其与CENEXIN的相互作用1.1.
- 在KIFC3缺乏细胞中分析FBF1和CENEXIN1转移到PML-NBs.
- 在缺乏KIFC的受损细胞中评估衰老的启动3.3.
主要成果:
- 在应激细胞中发现了应激诱导的核至微管阵列 (sinc-MTs) 的短暂组合.
- 确定了KIFC3作为一个被招募到sinc-MTs的减值终端定向激素,与CENEXIN1.1相互作用.
- 证明KIFC3缺陷阻止FBF1和CENEXIN1转移到PML-NBs,并阻止衰老的启动.
- 显示KIFC3介导的FBF1核运输沿着多重谷氨基酸MTs对衰老至关重要.
结论:
- 沿着专门的多重胺微管阵列运输FBF1的KIFC3依赖是诱导受损哺乳动物细胞衰老的先决条件.
- 这一途径突出了一个新的机制,它将细胞应激,细胞内运输和衰老的开始联系在一起.
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