组织因子信号修改了G1/S检查点调节者的表达和调节:在受伤和长期炎症期间的影响
Sophie J Featherby1, Eamon C Faulkner1, Camille Ettelaie1
1Biomedical Section, Hull-York Medical School, University of Hull, Hull, HU6 7RX, UK.
Molecular medicine reports
|November 29, 2024
概括
组织因子 (TF) 调节细胞循环检查点,影响伤口愈合. 它的度表明细胞损伤,但长时间暴露会导致异常细胞生长,因调节瘤抑制剂.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 组织因子 (TF) 除了凝血之外还有其他的作用,包括伤口愈合和细胞循环调节.
- 通过TF影响细胞周期检查点的精确信号机制仍未确定.
- 在受伤部位的TF度可以表明损伤程度并启动修复过程.
研究的目的:
- 研究不同重组TF度对内皮和上皮细胞G1/S检查点调节者的影响.
- 阐明涉及TF介导细胞循环控制的信号通路.
- 了解TF度如何影响细胞增殖和潜在异常生长.
主要方法:
- 对内皮细胞 (HDBEC,HUVEC) 和上皮细胞 (hTERT-HPNE,AsPC-1) 暴露于不同度的重组TF.
- 对G1/S检查点调节者的分析,包括p16INKa,p21CIP1/WAF1,E2F活性和视网膜母细胞瘤蛋白酸化.
- 使用特定抗体 (AIIB2,10H10) 抑制β1-整合素和阻断TF外位素,以研究信号通路.
- 评估p16INKa促进体甲基化和p14ARF表达在长时间TF暴露后的反应.
主要成果:
- 低TF度通过增加p16INKa,减少p21CIP1/WAF1,增强E2F活性和增加视网膜母细胞蛋白酸化,促进细胞增殖.
- 抑制β1-整合素或TF外位素阻断可以防止p16INKa的增加.
- 高的TF度导致p16INKa和p21CIP1/WAF1的不成比例增加,减少了视网膜母细胞瘤蛋白酸化和E2F活性.
- 在hTERT-HPNE细胞中长时间的TF暴露导致p16INKa下调 (部分是通过减少mRNA和增加甲基化),增加E2F活性和升高的环林EmRNA,部分是由于增加p14ARF.
结论:
- TF度决定其对细胞周期进展的影响,低水平促进增殖,高水平抑制增殖.
- TF信号传递涉及β1-整合素及其外位素,影响关键细胞循环调节器.
- 长时间的TF暴露,可能在炎症期间,可以调节瘤抑制剂,导致异常细胞生长,并突出了TF在损伤反应和病理学的双重作用.
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