长寿蝙蝠的有限的细胞自主抗癌机制
Fathima Athar1, Zhizhong Zheng1, Sebastien Riquier2
1Department of Biology, University of Rochester, Rochester, NY, USA.
Nature communications
|May 3, 2025
概括
蝙蝠具有显著的寿命和抗癌能力. 研究表明,它们的纤维细胞抵抗衰老,并随着特定的瘤基因突变迅速转变,这表明增强的p53活性和免疫监测作为抗癌策略.
科学领域:
- 老年学是一门学科.
- 癌症生物学 癌症生物学
- 进行比较基因组学.
背景情况:
- 蝙蝠表现出特殊的寿命和抗癌能力,超过大多数哺乳动物.
- 了解蝙蝠寿命和瘤抑制背后的细胞机制对于衰老和癌症研究至关重要.
研究的目的:
- 为了研究来自各种长寿蝙蝠物种的纤维细胞中恶性转变的细胞需求.
- 确定蝙蝠中潜在的抗衰老和抗癌防御机制.
主要方法:
- 从四种蝙蝠物种中分离出了初级纤维细胞:Myotis lucifugus,Eptesicus fuscus,Eonycteris spelaea和Artibeus jamaicensis. 这四种蝙蝠物种中分离出了初级纤维细胞.
- 分析了细胞的复制性衰老,端粒酶活性,分泌表型和对瘤转化 (p53/pRb无活化,HRAS激活) 的敏感性.
- 评估了基因表达 (TP53,MDM2) 和亡,并对M. lucifugus.中的TP53重复进行了基因组分析.
主要成果:
- 蝙蝠纤维细胞不会经历复制性衰老,并且表达活性端粒酶.
- 他们表现出抑制的分泌表型.
- 与其他长寿哺乳动物不同,蝙蝠纤维细胞通过p53或prb的无活化与HRAS激活相结合,很容易转化.
- 观察到TP53和MDM2转录的升高和p53-依赖性亡的增加.
- Myotis lucifugus显示TP53的基因组复制.
结论:
- 蝙蝠纤维细胞具有独特的细胞特性,包括抵抗衰老和活性端粒酶.
- 增强的p53活性,可能涉及基因组复制,可以作为一些蝙蝠物种的抗癌机制.
- 缺乏独特的细胞自主瘤抑制方法表明,蝙蝠可能依靠强大的体内免疫监测来预防癌症.
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