Tendon-derived stem/progenitor cell aging: defective self-renewal and altered fate.
Tendon-derived stem/progenitor cell aging: defective self-renewal and altered fate.
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DOI：
10.1111/j.1474-9726.2010.00598.x
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发表时间：
2010-10
期刊：
影响因子：
7.8
通讯作者：
Sun HB
中科院分区：
文献类型：
--
作者：
Zhou Z;Akinbiyi T;Xu L;Ramcharan M;Leong DJ;Ros SJ;Colvin AC;Schaffler MB;Majeska RJ;Flatow EL;Sun HB
Aging is a major risk factor for tendon injury and impaired tendon healing, but the basis for these relationships remains poorly understood. Here we show that rat tendon-derived stem/progenitor cells (TSPCs) differ in both self-renewal and differentiation capability with age. The frequency of TSPCs in tendon tissues of aged animals is markedly reduced based on colony formation assays. Proliferation rate is decreased, cell cycle progression is delayed and cell fate patterns are also altered in aged TSPCs. In particular, expression of tendon lineage marker genes decreased while adipocytic differentiation increased. Cited2, a multi-stimuli responsive transactivator involved in cell growth and senescence, was also downregulated in aged TSPCs while CD44, a matrix assembling and organizing protein implicated in tendon healing, was upregulated, suggesting that these genes participate in the control of TSPC function.
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