为什么会脱发?英国团队剖析背后复杂的遗传因素

2017-02-26 佚名 生物通

随着年龄的增长,发际线后移是许多男性的苦恼。最近,一项关于男性型秃发的大型全基因组关联研究表明,多个常见变异与这种性状相关联,暗示未来有望开发出多基因的预测型检测。这项成果发表在《PLOS Genetics》杂志上。

随着年龄的增长,发际线后移是许多男性的苦恼。最近,一项关于男性型秃发的大型全基因组关联研究表明,多个常见变异与这种性状相关联,暗示未来有望开发出多基因的预测型检测。这项成果发表在《PLOS Genetics》杂志上。



英国的研究人员以52,000多名年龄在40至69岁的男性为研究对象,根据芯片提供的基因分型信息,搜索了与秃发相关的常见变异。他们发现,常染色体或X性染色体上的数百个变异与男性型秃发相一致。

有了这些数据,研究团队尝试着开发一种工具,来预测部分原始参与者的秃发。这种方法似乎有望预测整个人群的男性型秃发,不过要准确预测某个人的秃发可能,还有很长一段路要走。

这篇文章的通讯作者、爱丁堡大学的Riccardo Marioni表示:“对于每个人脱发模式的准确预测,我们还有相当长的路要走。不过,这些结果让我们更近了一步。它为深入了解脱发的遗传原因打下了基础。”

过去的遗传研究表明,对男性型秃发影响最大的一些遗传因素落在X染色体上,大家都知道,X染色体遗传自男性的母亲。不过,即便如此,秃发的大部分遗传因素仍然是未知的,这使得人们难以提出策略来预测或治疗这种性状,而它似乎与前列腺癌或心脏病有着明显关联。

在此次的GWAS研究中,研究人员收集了超过52,000名英国生物样本库参与者的基因分型数据。在这些参与者中,16,724名男性无脱发症状,12,135名轻度脱发,14,234名中度脱发,而9,781名男性严重脱发。

研究人员的分析使得247个常染色体变异和40个X染色体变异浮出水面,它们与秃发明显相关。从基因角度看这些变异,说明常染色体上的112个基因以及X染色体上的十多个基因与秃发相关。

之后,研究人员在40,000名男性上重复了他们的分析,以便开发多基因风险评分,来预测另外12,874名参与者的轻度、中度或严重脱发。他们发现,敏感性在64%-74%,特异性在53%-69%。他们指出,随着年龄的增加,预测的准确性也略有提升。

作者在文中指出,“脱发模式中相当一部分的个体差异可通过常染色体或X染色体上的常见遗传变异来解释。不过,与早发性秃发相比,晚发性秃发中X染色体所解释的差异要低得多。”

原始出处:

Saskia P.Hagenaars,W.David Hill,et al. Genetic prediction of male pattern baldness. PLOS Genetics Published: February 14, 2017

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    2017-03-10 虈亣靌

    学习了谢谢分享

    0

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    2017-02-26 Anima

    脱发

    0

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    2017-02-26 半夏微凉

    普遍现象!

    0

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    2017-02-26 ren1mw

    脱发与多种因素相关,英国人团队回玩

    0

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    2017-02-26 yafeiliutjh

    脱发痛苦

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