摘要
成体干细胞(adult stem cells)具有自我更新功能并可以分化为执行特定功能的体细胞,维持组织和器官结构完整和功能健全。有研究显示衰老可以出现在成体干细胞水平,并与机体老龄化及损伤修复能力下降有关。哺乳动物沉默调节因子2相关酶1(Sirtuins 1,SIRT1)是NAD+依赖性蛋白去乙酰化酶。对体细胞的研究表明,提高SIRT1活性可以抗细胞衰老。近年来,成体干细胞的相关研究表明SIRT1可能具有平衡干细胞的静息与增殖、维持干细胞自我更新功能、缓解年龄相关性成体干细胞功能下降和抑制成体干细胞分化紊乱的作用,但其抗衰老的分子机制还有待进一步研究。
stem cells differentiate into a variety of somatic cells which perform particular functions,in order to maintain integrity of specific tissues and organs during their lifespan.Studies have shown that senescence,which contributes to aging and the weakness under stress,occurs in adult stem cells.Sirtuins 1(SIRT1) is a NAD+-dependent deacetylase in mammalian cells.Activated SIRT1 may have anti-senescence effects on somatic cells,as well as in adult stem cells through balancing stem cell quiescence and proliferation,maintaining self-renewal capacity,ameliorating age-related decline in stem cell function and diminishing differentiation bias.Molecular mechanisms underlying SIRT1 anti-senescence ability still require to be investigated.
出处
《中国药理学通报》
CAS
CSCD
北大核心
2011年第1期140-142,共3页
Chinese Pharmacological Bulletin
基金
国家自然科学基金资助项目(No81072237)
国家重点基础研究发展计划(973计划)资助项目(No2011CB964800)