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Nat Commun:接触重金属,可能会导致自闭症

2017-06-03 ulip1999 来宝网

虽然还不知道是什么原因导致自闭症,但研究人员认为,是环境因素与遗传因素之间复杂的相互作用导致了该疾病的发生。但要想把这些因素分离开则是一个不小的挑战。一项最新研究发现了一种能够将导致自闭症的遗传因素与环境因素相分离的方法,使研究者能够专注于研究体内重金属水平与自闭症风险之间的关系。

【接触重金属可能会增加自闭症风险】虽然还不知道是什么原因导致自闭症,但研究人员认为,是环境因素与遗传因素之间复杂的相互作用导致了该疾病的发生。但要想把这些因素分离开则是一个不小的挑战。一项最新研究发现了一种能够将导致自闭症的遗传因素与环境因素相分离的方法,使研究者能够专注于研究体内重金属水平与自闭症风险之间的关系。

根据疾病预防与控制中心(CDC)的最新数据显示,美国每68名儿童当中就有1人患有自闭症谱系障碍(ASD)

最近的一项研究探讨了可能会导致自闭症谱系障碍(ASD)发病新的因素:孩子体内的重金属浓度。

这项最新研究是在纽约西奈山伊坎医学院的牙科医生及环境科学家Manish Arora博士带领下完成的,这项最新研究成果发表在《自然通讯》杂志上。

在这项最新研究中,研究人员通过观察自然脱落的婴儿牙齿,可以获取婴儿出生前的信息。通过研究双胞胎,Arora教授及其同事就能够将遗传因素从环境因素中分离出来。

为了确定出生前后婴儿体内的重金属含量,研究人员使用激光对婴儿牙齿上的生长环进行分析。

全国环境卫生科学研究所(NIEHS)基因、环境与健康部门负责人Cindy Lawler博士说明了利用这种科学方法研究自闭症的重要性:

“我们认为自闭症很早就开始发病,最有可能在子宫里就开始了,该研究表明,我们的环境会增加孩子患自闭症的风险。但当孩子3岁或4岁时才被诊断出来时,很难再回头去了解母亲当时接触重金属的详细情况。有了乳牙,我们就可以做到这一点。”

研究人员观察了32对双胞胎的牙齿,并分别研究了双胞胎当中的12名儿童的牙齿。

一对双胞胎中只有一个孩子患有ASD,对他们的牙齿进行分析后显示两者的重金属摄取水平差异较大。

研究发现,自闭症儿童在其生长发育过程中体内铅含量一直处于高位。

总的来说,这项研究表明,无论是产前接触重金属,还是机体处理重金属的能力有限,都可能会影响自闭症发病的机会

原始出处

Manish Arora, Abraham Reichenberg, Charlotte Willfors, et al. Fetal and postnatal metal dysregulation in autism. Nature Communications 8, Article number: 15493 (2017), doi:10.1038/ncomms15493.

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    2017-10-27 liuli5079
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    2018-03-14 saikp
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    2017-09-27 liye789132251
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    2017-06-05 xiongke014

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