辅助型T细胞细胞因子驱动癌症进入衰老状态
Heidi Braumüller1, Thomas Wieder, Ellen Brenner
1Department of Dermatology, Eberhard Karls University, Liebermeister Strasse 25, 72076 Tübingen, Germany.
Nature
|February 5, 2013
概括
瘤免疫可以通过T细胞和干扰素- (IFN-γ) 阻止癌症的生长. 结合IFN-γ和瘤亡因子 (TNF) 诱导永久性癌细胞生长停止,这一过程称为衰老.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 细胞生物学 细胞生物学
背景情况:
- 适应性免疫利用死亡和清除机制来控制癌症.
- 通过T细胞和干扰素-γ (IFN-γ) 进行有效的癌症生长抑制,需要额外的未定义机制来阻止增殖.
研究的目的:
- 调查T-辅助-1-细胞细胞因子,特别是IFN-γ和瘤坏死因子 (TNF) 在诱导永久性癌症生长停止中的作用.
- 阐明癌症中细胞因子诱导衰老的分子机制.
主要方法:
- 利用表达Simian virus 40大T抗原 (Tag) 的小鼠模型创建具有减弱p53和Rb通路的瘤.
- 对Tag表达性癌症进行联合IFN-γ和TNF的治疗.
- 评估了细胞循环停止 (G1/G0),p16INK4a激活,Rb低酸化以及STAT1和TNFR1信号传递.
- 研究了T-辅助1细胞和TNFR1信号传递在Tag表达癌症中的体内作用.
主要成果:
- 结合IFN-γ和TNF诱导Tag表达癌症的永久G1/G0增长停止,激活p16INK4a并导致Rb低酸化.
- 这种细胞因子诱导的衰老需要STAT1和TNFR1信号.
- 在体内,T-辅助1细胞诱导IFN-γ和TNFR1-依赖的衰老,永久停止Tag表达的癌症.
- 缺乏TNFR1的癌症抵抗细胞因子诱导的衰老,并表现出侵略性的生长.
结论:
- IFN-γ和TNF的联合作用直接诱导癌症的永久性生长停止 (衰老).
- 这种细胞因子诱导的衰老是阻止癌症进展的一般机制,需要STAT1和TNFR1信号.
- 针对这些途径可以为癌症控制提供新的策略.
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