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CIRC RES:年龄和心血管疾病危险因素对人类再生能力的影响

2016-09-18 MedSci MedSci原创

健康的衰老过程循环中PC水平并不下降,而年轻人短期在心血管疾病危险因素暴露下可刺激PC的动员,但如果在以后的生活中持续暴露,则与较低的PC水平有关。在生命过程中,暴露于心血管疾病危险因素和心血管疾病是一个初始阶段刺激反映了内源性再生能力PC水平增加,而随后的下降的过程。

近日,心血管领域权威杂志《Circulation Research》发表了亚特兰大埃默里临床心血管研究所Ibhar教授的文章,研究了暴露于心血管疾病危险因素以及心血管疾病是否会导致人类内源性修复能力的加速下降,并阐明了心血管疾病或其危险因素与人类内源性修复能力老化之间的关系。

研究通过循环中祖细胞(PC)水平反映内源性再生潜能,研究者纳入了2792名成人作为研究对象,其中,498名研究对象无心血管疾病或其危险因素(吸烟、糖尿病、高血压、或高脂血症)暴露史,1036名有1至2个心血管疾病危险因素,另有1253名研究对象有3个或多于3个的心血管疾病危险因素或心血管疾病。


通过流式细胞仪筛选出表达CD45med +和CD34分子的细胞,以及这些细胞中共表达CD133、CXCR4和血管内皮生长因子受体表位的单核细胞,即为PC。年龄小、男性和较大的体格与较多的PC计数呈正相关(P<0.01)。经过多变量调整后,年龄和心血管疾病危险因素的类别都与循环中PC计数相关(P = 0.05),而较低的循环中PC计数与老年以及心血管疾病危险因素较多或心血管疾病相关。随着年龄的增加,但是健康人的循环中PC计数保持不变。此外,年龄和心血管疾病危险因素之间存在显著的交互作用(P≤0.005),如年轻的研究对象(<40岁),心血管疾病危险因素与增加的PC数量相关,而老年受试者(>60岁),心血管疾病危险因素和心血管疾病都与较低的PC数量相关。

由此可见,健康的衰老过程循环中PC水平并不下降,而年轻人短期在心血管疾病危险因素暴露下可刺激PC的动员,但如果在以后的生活中持续暴露,则与较低的PC水平有关。在生命过程中,暴露于心血管疾病危险因素和心血管疾病是一个初始阶段刺激反映了内源性再生能力PC水平增加,而随后的下降的过程。

原始出处:

Ibhar Al Mheid, et al. Age and Human Regenerative Capacity Impact of Cardiovascular Risk Factors. Circulation research.2016. 

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    2016-09-27 童小孩

    学习了,很受益,谢谢分享,继续关注中!

    0

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    2016-09-19 doctorJiangchao

    继续关注

    0

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    2016-09-19 doctorJiangchao

    继续学习

    0

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