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在应激反应时,WWOX诱导通过溶酶体途径促进Bcl-XL和Mcl-1降解
Yu-Han Su1, Wei Chiang2, Yi-Yu Wang1
1Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan 701401, Taiwan.
Cells
|February 12, 2026
概括
压力增加WWOX基因表达,影响细胞死亡途径. 通过溶解体,WWOX促进了Bcl-XL和Mcl-1蛋白的降解,从而加剧了氧化应激.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 遗传学 遗传学 是一个
背景情况:
- 在疾病中,WWOX基因经常发生变化,但其表达调节不清楚.
- WWOX突变与癌症,神经退行和发育缺陷有关.
- 了解WWOX调节对于疾病干预至关重要.
研究的目的:
- 为了研究压力条件下WWOX表达的调节.
- 阐明WWOX在细胞对氧化应激和亡的反应中的作用.
- 为了确定WWOX介导的蛋白质降解背后的分子机制.
主要方法:
- 使用了人类SCC-15细胞和野生类型/Wwox缺乏的小鼠胚胎纤维细胞 (MEF).
- 应用压力刺激,包括血清剥夺,氧化压力和抗癌药物.
- 通过西式涂抹分析了蛋白质表达水平 (Bcl-XL,Mcl-1).
- 使用溶酶体抑制剂和抗氧化剂 (N-乙-L-氨酸) 调查蛋白质降解途径.
主要成果:
- 压力反应转录地激活了WWOX表达.
- 血清剥夺增加了WWOX-熟练的细胞中的活性氧物种 (ROS) 和细胞死亡.
- 在血清饥饿过程中,WWOX缺乏会阻止抗亡性Bcl-2蛋白 (Bcl-XL,Mcl-1) 的下调.
- WWOX调解了Bcl-XL和Mcl-1的依赖于溶酶体的降解.
- 抗氧化剂治疗减少了WWOX诱导在血清剥夺下.
结论:
- 压力刺激通过ROS生产诱导WOX表达.
- 通过 lysosomal 途径,WWOX 促进了 Bcl-XL 和 Mcl-1 的降解.
- 这种机制加剧了氧化应激和细胞死亡,突出了WWOX在细胞平衡中的作用.
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