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The aging of lympho-hematopoietic stem cells

机译:淋巴细胞造血干细胞的衰老

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The extensive self-renewal capacity of hematopoietic stem cells (HSCs) implies that this cell population may not age and thus may provide undiminished replenishment of blood cells throughout the lifespan of an organism. In contrast, accumulating experimental evidence supports the premise that HSCs show signs of aging and may have a limited functional lifespan. We summarize here the evidence for HSC aging, discuss the possible molecular mechanisms that may be involved and show evidence of a genetic connection between the effects of age on blood-forming cells and the longevity of mice. We speculate that age-related functional decline in adult tissue HSCs limits longevity in mammals.
机译:造血干细胞(HSC)广泛的自我更新能力意味着该细胞群可能不会老化,因此在整个生物体的整个生命周期中都可能提供血细胞补充。相反,越来越多的实验证据支持了HSC出现衰老迹象且功能寿命有限的前提。我们在这里总结了HSC衰老的证据,讨论了可能涉及的分子机制,并显示了年龄对造血细胞的影响与小鼠寿命之间的遗传联系。我们推测成年组织HSC中与年龄相关的功能下降会限制哺乳动物的寿命。

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