淋巴细胞生成
骨髓生成
造血
干细胞
干细胞衰老理论
生物
端粒
衰老
造血干细胞
免疫系统
免疫学
细胞生物学
干细胞因子
遗传学
DNA
作者
Jianwei Wang,Hartmut Geiger,K. Lenhard Rudolph
标识
DOI:10.1016/j.coi.2011.05.004
摘要
Hematopoietic stem cells (HSCs) generate all known hematopoietic lineages and self-renew, but the function of HSCs declines during aging, which is characterized as impairments of lymphopoiesis and enhanced myelopoiesis. These aging-associated changes correlate with an increasing risk of myelo-proliferative diseases and impairments in immune function. Recent studies showed that only a subpopulation of HSCs contains a high capacity to undergo lymphoid differentiation but this subpopulation is lost during aging, which contributes to age-related impairments in lymphopoiesis. On the basis of the observations that DNA damage and telomere dysfunction can impair stem cell function, it is possible that accumulation of DNA damage results in the loss of subpopulations of HSCs that are required for the maintenance of lymphopoiesis and immune functions during aging.
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