Science:防不胜防!当爹的基因明明没突变,竟也会导致自闭症?

2018-04-20 药明康德 学术经纬

自闭症是一类影响广泛的疾病。随着近年来人们对这一疾病关注热度的不断上升,越来越多的人对自闭症也有了更深的了解。

自闭症是一类影响广泛的疾病。随着近年来人们对这一疾病关注热度的不断上升,越来越多的人对自闭症也有了更深的了解。

在多年的研究下,科学家们已经确认,自然产生的基因突变(de novo mutations)与将近三分之一的自闭症相关。而在今日最新上线的一项《科学》研究里,来自加州大学圣地亚哥分校(UCSD)的研究人员则发现,哪怕DNA突变没有影响到基因(术语是非编码区的突变),依然能导致自闭症的发生,成为发病的罪魁祸首。

“十年以来,我们都说自闭症的遗传因素里,部分是因为编码蛋白序列的基因出现新的突变,”该研究的通讯作者Jonathan Sebat教授说道:“但要知道,这些序列只占了基因组的2%。”

那剩下的98%对自闭症有什么作用呢?为了回答这个问题,在Human Longevity与Illumina两家著名公司的协助下,Sebat教授与他的同事们分析了2600个家庭里,9274名个体的完整基因组数据。随后,研究人员们分析了这些基因组信息里的异常,这包括结构上的变化、DNA元件的删除、以及DNA元件的复制等。从中,研究人员们希望找到关于自闭症的最新洞见。


研究人员们找到了不少非编码区的变异

而结果正如他们所料,即便没有影响到基因,这些来自于非编码区的突变同样会遗传给后代,引起自闭症。“我们还发现这些变异主要来自父亲,这非常令人惊讶!”该研究的共同第一作者William M. Brandler博士说道。

这个发现可以说有着重要意义。过去人们发现,在编码区变异(常说的基因突变)导致的自闭症里,这些突变主要来自于母亲。而今日的这项研究则表明,父母双方的遗传信息都有可能造成后代的自闭症,两者从编码的信息上看有本质区别。

“这是一项非常出色的研究,它让我们从一个不同的角度来认识自闭症的遗传学,是对该领域做出的重大贡献。”华盛顿州立大学的神经学家Lucia Peixoto博士在《科学》杂志上评论道。

基于这些发现,研究人员们提出了一个关于自闭症的全新解释。他们认为从母亲这里遗传到的基因突变,辅以父亲这里遗传到的非编码区突变,这两者相结合,导致了自闭症症状的产生。

随着人们对自闭症理解的不断加深以及基因疗法的迅猛发展,未来有一天,或许我们通过基因组测序,就能提前知道自己的后代罹患自闭症的风险,甚至在孩子出生前纠正这些突变。我们期待这一天的尽早到来。

原始出处:

William M. Brandler,et al.Paternally inherited cis-regulatory structural variants are associated with autism.Science  20 Apr 2018:Vol. 360, Issue 6386, pp. 327-331

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    2018-04-22 jichang
  2. [GetPortalCommentsPageByObjectIdResponse(id=1375805, encodeId=d17613e580565, content=<a href='/topic/show?id=2949159989d' target=_blank style='color:#2F92EE;'>#SCIE#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=40, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=15998, encryptionId=2949159989d, topicName=SCIE)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=17a3387, createdName=jichang, createdTime=Sun Apr 22 09:56:00 CST 2018, time=2018-04-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1527708, encodeId=99bf152e70870, content=<a href='/topic/show?id=68b5863e5d2' target=_blank style='color:#2F92EE;'>#自闭#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=30, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=86375, encryptionId=68b5863e5d2, topicName=自闭)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=159511872623, createdName=xiongke014, createdTime=Sun Apr 22 09:56:00 CST 2018, time=2018-04-22, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=307679, encodeId=4cc230e67903, content=了解一下.谢谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=66, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cdnapi.center.medsci.cn/medsci/head/2019/12/23/2f51002e1349ccda5be11c1eea1e1e60.jpg, createdBy=a22097948, createdName=天地飞扬, createdTime=Fri Apr 20 21:32:42 CST 2018, time=2018-04-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=307645, encodeId=6ba530e64561, content=学习了受益匪浅, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/ajNVdqHZLLDicHg2ldsSNmib46PmdzpO7CQEmPjuULp1v45zPWwMYhrnXgvl3OtmUCZSQfgITWn96X9moL94nUGA/0, createdBy=28072041016, createdName=131****1460, createdTime=Fri Apr 20 20:00:43 CST 2018, time=2018-04-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=307643, encodeId=89ed30e6438b, content=学习一下谢谢, beContent=null, objectType=article, channel=null, level=null, likeNumber=59, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://wx.qlogo.cn/mmopen/mONcle9pic3zSn0GqHrsfLGSUSR8zwnWWLT4FMl5XH8S58HuZslVkLsAPbXDXaliagK7TOxQfmngKibG1yrDonepCLDkcxGk8hS/0, createdBy=b8282062892, createdName=changjiu, createdTime=Fri Apr 20 19:26:25 CST 2018, time=2018-04-20, status=1, ipAttribution=)]
    2018-04-22 xiongke014
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    2018-04-20 天地飞扬

    了解一下.谢谢分享!

    0

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    2018-04-20 131****1460

    学习了受益匪浅

    0

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    2018-04-20 changjiu

    学习一下谢谢

    0

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