主性纤毛通过TGF-β1信号传递参与辐射诱导的旁观者效应
Pei Qu1,2, Zhiang Shao1,2, Yanan Zhang1,2
1Key Laboratory of Space Radiobiology of Gansu Province & Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.
Journal of cellular physiology
|November 27, 2023
概括
主要毛在辐射诱导的旁观者效应 (RIBES) 中发挥着关键作用,通过调节瘤生长因子-β (TGF-β) 信号传递. 这项研究揭示了主要乳毛是如何影响旁观细胞中的DNA损伤的,将乳毛功能与RIBEs联系起来.
科学领域:
- 细胞生物学 细胞生物学
- 辐射生物学 辐射生物学
- 分子信号传输的方法
背景情况:
- 瘤生长因子-β (TGF-β) 信号与辐射诱导的旁观者效应 (RIBES) 有关.
- 主性纤毛 (PC) 是一个细胞器官,参与各种信号通路,包括TGF-β.
- 在TGF-β介导的RIBEs中PC的特定作用尚不清楚.
研究的目的:
- 为了调查一次性眼在TGF-β诱导的辐射诱导旁观者效应 (RIBES) 中的参与.
- 阐明主要乳毛调节旁观细胞中DNA损伤的机制.
- 建立由TGF-β信号介导的初级毛和RIBEs之间的功能联系.
主要方法:
- 使用西布洛特和ELISA对TGF-β1表达和分泌的量化.
- 通过化学处理 (CytoD) 和siRNA转染 (STIL,IFT88,KIF3a) 来操纵纤维生成.
- 通过p21表达,53BP1焦点和γH2AX焦点评估DNA损伤.
- 使用TβR1抑制剂 (LY2109761) 和中性抗体干扰TGF-β信号传递.
- 细胞周期同步 (G0/G1停止和S阶段诱导) 以分析相位特异性影响.
主要成果:
- 照射增加了A549和Beas-2B细胞中的TGF-β1表达和分泌.
- 辐射条件介质 (RCM) 和TGF-β1治疗诱导了旁观细胞的DNA损伤,通过阻断TGF-β信号来减轻这种损伤.
- 损坏的PC形成 (IFT88或KIF3asiRNA) 加重了旁观者DNA损伤,而增强的PC形成 (CytoD或STILsiRNA) 减少了它.
- TGF-β1在S相细胞 (较低的PC形成) 中引起了更多的DNA损伤,而在G0/G1细胞 (较高的PC形成) 中则减少了损伤.
结论:
- 主要毛在通过TGF-β1信号传递暴露于辐射的旁观细胞中限制DNA损伤方面发挥着关键作用.
- 这项研究确立了初级毛和辐射诱导的旁观者效应 (RIBES) 之间的功能联系.
- 主要毛作为TGF-β介导的旁观者反应的关键调节者,影响DNA损伤的积累.
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