通过化学诱导的重编程来逆转细胞衰老
Jae-Hyun Yang1, Christopher A Petty1, Thomas Dixon-McDougall1
1Paul F. Glenn Center for Biology of Aging Research, Department of Genetics, Blavatnik Institute, Harvard Medical School (HMS), Boston, MA 02115, USA.
Aging
|July 12, 2023
概括
科学家们发现了化学尾酒,可以逆转人类细胞中的细胞衰老. 这些化合物在不改变基因组的情况下恢复年轻的基因表达和细胞功能,为复苏疗法提供了一条新的途径.
科学领域:
- 表观遗传学和衰老研究.
- 细胞复苏和再生医学是细胞复苏和再生医学.
背景情况:
- 细胞衰老的特点是表观遗传信息丢失,这是一个可逆的过程.
- 以前的研究表明,Yamanaka因子 (OCT4,SOX2,KLF4) 可以在没有删除细胞身份的情况下逆转哺乳动物的表观遗传衰老.
- 这一过程需要活性DNA脱甲基化.
研究的目的:
- 开发高通量测试,用于选逆转人类细胞细胞衰老的分子.
- 识别能够在没有基因组改变的情况下使细胞再生的化学化合物.
- 研究实现衰老逆转和细胞再生的化学手段.
主要方法:
- 开发高通量基于细胞的测定,包括基于转录的衰老钟和实时核细胞质区分 (NCC) 测定.
- 利用这些测试来选可以区分和逆转人类细胞中衰老和衰老标志物的分子.
- 评估已识别的化学尾酒对全基因组转录档案和细胞身份的影响.
主要成果:
- 鉴定了六种有效逆转细胞衰老标记的化学尾酒.
- 证明这些尾酒在一周内恢复了年轻的全基因组转录档案.
- 确认细胞身份在复原过程中被保留.
- 在接受治疗的人类细胞中逆转转录组年龄.
结论:
- 细胞衰老和复苏可以通过化学干预来实现,而不仅仅是基因手段.
- 已识别的化学尾酒为治疗衰老逆转提供了一个有希望的途径.
- 这项研究验证了用于恢复年轻细胞功能和表观遗传模式的化学方法.
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