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人参皂苷Rg1延缓造血干细胞衰老过程中端粒长度和端粒酶活性的变化

Yue ZHOU,Rong JIANG,Bin YANG,Xin YAO,Ping WANG,Dianfeng LIU,Yaping WANG

Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica（2011）

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Abstract
目的:探讨端粒长度和端粒酶活性在人参皂苷Rg1延缓造血干细胞(HSC)衰老中的作用.方法:免疫磁性分选法分离纯化小鼠Sca-1+ HSC后分5组:对照组,衰老模型组,Rg1组,Rg1治疗衰老组,Rg1延缓衰老组.衰老相关β-半乳糖苷酶(SA-β-Gal)染色、流式细胞术细胞周期测定和造血祖细胞混合集落(CFU-Mix)培养分析Rg1调控Sca-1+ HSC衰老的生物学作用；Southern blotting与TRAP-PCR SYBR Green法检测端粒长度和端粒酶活性.结果:与衰老模型组相比,Rg1治疗组和Rg1延缓衰老组Sca-1+ HSC的SA-β-Gal染色阳性细胞百分比降低,G1期细胞比例下降,生成CFU-Mix数相对增加,端粒长度缩短明显减少,端粒酶活性增强；Rg1延缓衰老组各检测指标变化均较Rg1治疗组明显.结论:Rg1可能通过激活端粒酶活性和减少端粒长度缩短发挥延缓和治疗Sca-1+ HSC衰老的作用.
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Key words
Ginsenoside Rg 1,Hematopoietic stem cell,Senescence,Telomerase,Telomere
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