FASEB J:新成果!靶向关键基因,或可逆转细胞衰老

2018-09-23 探索菌 生物探索

衰老是一个自然而然的过程,但是伴随着衰老进程,很多疾病(包括痴呆、癌症)的发生概率会显著增加。所以,科学家们一直试图减缓甚至于逆转这一过程。近日,《The FASEB Journal》期刊发表了一项最新研究,揭示了或可实现细胞衰老逆转的关键因子。

衰老是一个自然而然的过程,但是伴随着衰老进程,很多疾病(包括痴呆、癌症)的发生概率会显著增加。所以,科学家们一直试图减缓甚至于逆转这一过程。近日,《The FASEB Journal》期刊发表了一项最新研究,揭示了或可实现细胞衰老逆转的关键因子。

这一研究由埃克塞特大学医学院的科学家们完成。他们发现,某些调控剪接因子(splicing factors)的基因和通路在细胞衰老过程中起着关键作用。更重要的是,他们证实,扰乱这一遗传过程,有望逆转细胞衰老。

先前已有研究表明,细胞老化是机体衰老的驱动因素,在动物模型中去除这些细胞,衰老的许多特征可以被逆转。

现在,文章作者、埃克塞特大学医学院的Lorna Harries及其团队发现,抑制ERK和AKT(传递胞外信号、影响基因表达)的通路,能够减少衰老细胞的数量。此外,敲除这两个通路调控的两个基因——FOX01、ETV6同样可以减少衰老。

最新研究表明,ERK和AKT通路激活可能会阻碍剪接因子的活性,从而导致衰老细胞堆积。所以,为了抑制ERK和AKT通路的活性,研究团队选用了已在临床中作为抗癌药物的抑制剂。

当通路被药物阻止后,研究人员发现剪接因子水平增加。这意味着,蛋白质和基因之间有更好的交流。与此同时,衰老细胞数量也在减少。他们发现,衰老细胞身上与衰老过程有关的许多特征发生了逆转,导致细胞再生。

“我们很兴奋于这样的发现——干扰目标基因至少可以部分逆转人类细胞衰老过程中的关键因素。这一发现有助于我们找到延缓细胞衰老的方法,从而避免一些因细胞衰老而引发的疾病,例如痴呆症和癌症。”Lorna Harries表示,“我们选用的化合物已经广泛应用于抗癌治疗中,所以相对安全。但是这项研究还处于早期阶段,下一步我们需要深入解析细胞和遗传物质影响机体衰老的机制。”

原始出处:
Eva Latorre, Elizabeth L. Ostler, et al. FOXO1 and ETV6 genes may represent novel regulators of splicing factor expression in cellular senescence. The FASEB Journal, Sep 2018.

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    2019-05-25 gracezdd
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    2018-12-04 wgx306
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    2018-09-24 lietome15

    好文,值得点赞!认真学习了,把经验应用于实践,为患者解除病痛。

    0

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    2018-09-23 盖伦

    长生不老不是梦

    0

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    2018-09-23 kafei

    学习了谢谢

    0

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导 读 DNA修复机制在肿瘤的发生和进展过程中其到关键的作用。因此,研究人员不断探索靶向DNA修复机制关键蛋白在肿瘤疗中的作用。目前研究人员提出了对抗备用DNA修复机制的新方法。

Nature:免疫疗法——推动T细胞靶向脑肿瘤

本周《自然》在线发表的一篇论文A homing system targets therapeutic T cells to brain cancer报道了一种可以促进T细胞靶向脑肿瘤的策略。这些基于细胞和小鼠研究所得的发现或对改善脑疾病治疗方法具有一定意义。

Geno Med:PanDrugs——根据个体基因组特征优化肿瘤治疗的新方法

近日在Genome Medicine上发表的一篇文章展示了一种新的开放性工具,可用于评估癌症患者的基因组谱,以明确是否有治疗干预的机会。文章作者希望这种新方法将有助于在医院环境中推广预防医学。