Genes Dev:白发和脱发原因被找到!

2017-05-10 基因小生 医之道

最近,德克萨斯大学西南医学中心的研究人员发现了直接生成头发的细胞,以及导致头发变白的机制,该结果未来或有助于找到秃发和白发的可能治疗。研究结果在线发表于《基因与发育》杂志。



最近,德克萨斯大学西南医学中心的研究人员发现了直接生成头发的细胞,以及导致头发变白的机制,该结果未来或有助于找到秃发和白发的可能治疗。研究结果在线发表于《基因与发育》杂志。

“虽然这个项目开始是为了了解某些种类的肿瘤如何形成,但我们最终解释了头发变白的原因,并发现了直接生成头发的细胞。”德克萨斯大学西南医学中心哈罗德?C?西蒙斯综合肿瘤中心皮肤科副教授Lu Le说,“知道了这些,我们希望将来能够创制一种局部使用的化合物,或者将必要的基因安全地传递给毛囊,来纠正这些美容方面的问题。”

研究人员发现,一种叫做KROX20的蛋白质通常与神经发育相关,但在毛发生成过程中,这种蛋白质在成为毛发的皮肤细胞中开启。然后,这些头发的前体或祖细胞产生叫做干细胞因子(SCF)的蛋白质,研究人员发现这种蛋白质对于毛发色素沉着是必需的。

当它们在小鼠模型中删除毛发祖细胞中的SCF基因时,动物的毛发变成白色。研究显示,当他们删除产生KROX20的细胞时,没有毛发生长,小鼠变秃。

拥有Thomas L. Shields, M.D.皮肤病学教授讲席的Le博士说,他和他的研究人员在研究一种名为1型神经纤维瘤病的疾病(一种导致肿瘤长在神经上的罕见遗传疾病)时,偶然发现了这种秃发和白发的解释。

科学家已经知道,毛囊膨大区所含的干细胞参与毛发生成,而SCF对于色素细胞非常重要。Le是哈蒙再生医学科学中心的成员。

他说,他们没有详细了解的是:这些干细胞向下移动到毛囊的基部(或称球部)之后会发生什么,毛囊中的哪些细胞产生SCF——或参与毛发生成的细胞产生KROX20蛋白质。

如果携带有功能KROX20和SCF的细胞存在,则它们会从球部向上移动,与产生色素的黑素细胞相互作用,并长成有色的毛发。

但是研究显示,如果没有SCF,那么小鼠模型的毛发就是灰色的,然后随年龄增长而变白。研究显示,如果没有产生KROX20的细胞,就没有毛发生长。

Le博士说,德克萨斯大学西南医学中心的研究人员现在将尝试了解细胞中的KROX20和SCF基因是否随着年龄的增长而停止正常工作,导致老年人头发变白和变稀,以及男性型秃发。

该研究还可以提供关于全身衰老原因的答案,因为头发变白和脱发是衰老的最初迹象。

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    2017-07-08 fzwish20000
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    2017-09-22 cy0324
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    2017-05-18 186****0580(小山羊)

    学习了谢谢了。

    0

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    2017-05-11 顾小北大魔王

    白发不是因为黑色素缺乏么

    0

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    2017-05-10 cqykthl

    毛发祖细胞能主导白发还是黑发

    0

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