Aging Cell:致癌性RET竟然会引起头发变白 

2020-11-09 haibei MedSci原创

头发变白是动物和人类衰老的典型标志之一。以前的研究表明,随着年龄的增长,毛囊黑色素细胞干细胞(MSCs)数量的减少是人类头发变白的根本原因之一。

头发变白是动物和人类衰老的典型标志之一。以前的研究表明,随着年龄的增长,毛囊黑色素细胞干细胞(MSCs)数量的减少是人类头发变白的根本原因之一。因此,人们需要数十年的时间来分析人类头发随衰老而变白的动态,而随着年龄的增长, 逐渐出现毛发变白的模型动物成为了分析毛发变白机制的有用工具。

至今为止,已有超过10种毛发变白的转基因小鼠的报道,而毛发变白的野生型小鼠非常有限。然而,即使在模型小鼠中,分析与年龄相关的毛发白化也是困难的,因为许多动物是寿命有限的过早毛发白化的模型,而不是与年龄相关的毛发白化。如果有寿命大于20个月的毛发白化模型动物,不仅有可能获得年龄相关的头发白化的新见解,而且有可能开发出新的抗头发白化药物。

最近,研究人员在Aging Cell发文,报导其发现,在携带RET癌基因的RET转基因小鼠(RET-mice)中,没有黑色素细胞干细胞(MSCs)和后代黑色素细胞的毛囊的微观结构,小鼠也表现出毛发变白的宏观外观。这与之前报道的人类毛发变白的结果一致。因此,RET小鼠可能是一种新型的年龄相关的毛发变白模型小鼠系。

研究人员进一步表明,RET-小鼠的头发白化与RET介导的毛发周期加速、衰老的毛囊角质细胞干细胞(KSCs)增加,以及内皮素-1(ET-1)表达水平下降、间充质干细胞中内皮素受体B(Ednrb)表达下降有关,导致毛囊间充质干细胞数量减少。

然后,研究人员发现RET-小鼠的头发变白的速度加快了,因为在杂合Ednrb缺失的RET-小鼠[Ednrb(+/-);RET-小鼠]中,MSCs的Ednrb表达先天性降低。

最后研究人员部分证实了小鼠和人类头发变白与衰老的共同机制。

综上所述,该结果表明,毛囊KSCs中的ET-1和毛囊间充质干细胞中的内皮素受体B(Ednrb)之间通过累积毛发周期的年龄相关的功能障碍与头发随衰老而变白有关。

 

原始出处:

Machiko Iida et al. Hair graying with aging in mice carrying oncogenic RET. Aging Cell (2020). DOI: https://doi.org/10.1111/acel.13273

 

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    2021-06-17 ysjykql
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    2021-07-12 维他命
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    2020-11-11 jambiya
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    2020-11-11 qindq
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    2020-11-09 ms4729883395815160

    不错,深受启发

    0

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