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AGING CELL:表观年龄是移植人造血细胞的内在特性

2019-02-10 海北 MedSci原创

最近,基于短期观察的研究表明,异基因造血干细胞移植(HSCT)后重建血液的DNAm年龄反映了供体的年龄。然而,至今为止,尚不清楚供体血液的DNAm年龄是否长期与受体的年龄无关。

通过DNA甲基化分析可以准确估计组织和细胞的年龄。多组织DNA甲基化(DNAm)年龄预测因子结合了353个CpG二核苷酸的DNAm水平,以达到称为DNAm年龄的年龄估计。

最近,基于短期观察的研究表明,异基因造血干细胞移植(HSCT)后重建血液的DNAm年龄反映了供体的年龄。然而,至今为止,尚不清楚供体血液的DNAm年龄是否长期与受体的年龄无关。重要的是,包括儿童接受者在内的长期研究有可能清楚地揭示DNAm年龄是细胞内在特质,还是由细胞外因子所调节的。

最近,研究人员通过分析HSCT供体和受体对的血液甲基化数据来解决这个问题,这些供体和受体对在实际年龄上(年龄差异在1到49岁之间)差异很大。

研究人员发现重建血液的DNAm年龄不受受体年龄的影响,即使是HSCT后17年内没有血液系统疾病复发的个体中也是一样。然而,白血病复发的受体DNAm年龄不稳定。

这些数据与研究人员之前关于癌细胞DNAm异常年龄的研究结果一致,可以利用它来监测HSCT受体的健康状况。

因此,该数据表明,移植的人造血干细胞具有内在的DNAm年龄,不受不同年龄的受体环境的影响。


原始出处:

Arne Søraas et al. Epigenetic age is a cell‐intrinsic property in transplanted human hematopoietic cells. Aging Cell, 2019; doi: https://doi.org/10.1111/acel.12897


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    2019-05-16 zhouqu_8
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    2019-09-19 维他命
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    2019-02-12 俅侠
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    2019-02-10 一天没事干

    很好的学习机会

    0

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    2019-02-10 1e145228m78(暂无匿称)

    学习了,谢谢作者分享!

    0

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