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Old blood stem cells feel the stress

机译:老血干细胞感到压力

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摘要

Tissue renewal is a fundamental process that relies on the regenerative capacity of long-lived, self-renewing stem cells. But during ageing, stem-cell function deteriorates. The haematopoietic stem cells (HSCs) that maintain all blood-cell lineages are, like other long-lived stem cells, prone to accumulating DNA damage as they age. In the case of HSCs, the damage can reduce the cells' ability to regenerate blood-cell lineages, and can increase the risk of diseases such as leukaemia. But little is known about what causes the damage and how it contributes to the decline of old HSCs. On page 198 of this issue, Flach et al. report that damage is caused mostly by cellular stress that arises as a result of inefficient DNA replication, and they point to the probable molecular defects involved.
机译:组织更新是一个基本过程,它依赖于长寿的自我更新干细胞的再生能力。但是在老化过程中,干细胞功能会恶化。维持所有血细胞谱系的造血干细胞(HSC)与其他长寿干细胞一样,随着年龄的增长,容易累积DNA损伤。就HSC而言,这种损害会降低细胞再生血细胞谱系的能力,并增加患白血病等疾病的风险。但是,对于造成这种损害的原因及其对旧HSC下降的影响知之甚少。在本期的第198页上,Flach等人。报告指出,损伤主要是由于DNA复制效率低下而引起的细胞应激所致,并且指出了可能涉及的分子缺陷。

著录项

  • 来源
    《Nature》 |2014年第7513期|140-141|共2页
  • 作者

    JIRI BARTEK; ZDENEK HODNY;

  • 作者单位

    Institute of Molecular Genetics of the ASCR, v. v. i.,Prague 142 20, Czech Republic,Danish Cancer Society Research Center, Genome Integrity Unit, Copenhagen DK-2100, Denmark;

    Institute of Molecular Genetics of the ASCR, v. v. i.,Prague 142 20, Czech Republic;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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