AJHG:智力障碍相关的蛋白质调控机制

2013-05-06 T.Shen 生物谷

2012年10月27日--近日,来自阿德莱德大学的研究者研究揭示了困扰科学家40多年的家族相关的罕见智障发病的分子机制,与此同时研究者也发现了一些引发该疾病的信息,相关研究成功刊登于国际杂志The American Journal of Human Genetics上。 当机体基因编码蛋白发生突变时就会直接引发智障,本文研究中,研究者发现了蛋白质调节的突变和智障有关。蛋白质调节包括通过特殊基因来

2012年10月27日--近日,来自阿德莱德大学的研究者研究揭示了困扰科学家40多年的家族相关的罕见智障发病的分子机制,与此同时研究者也发现了一些引发该疾病的信息,相关研究成功刊登于国际杂志The American Journal of Human Genetics上。

当机体基因编码蛋白发生突变时就会直接引发智障,本文研究中,研究者发现了蛋白质调节的突变和智障有关。蛋白质调节包括通过特殊基因来开关蛋白质,这样造成的结果就是产生过多或者过少的蛋白质来诱发智障。

研究者对澳大利亚某个家族超过100人进行了研究,该家族人群并不知道智障遗传的原因。智障可以导致IQ低下,行为异常比如容易激动或者记忆力缺失等等。而且其仅仅影响家族中的男性成员,可以通过妇女遗传给下一代孩子。

研究揭示了蛋白质HCFC1(宿主细胞因子C1)的产生是导致智障的原因。研究者Jozef Gecz教授表示,我们研究这种罕见的智障已经有10年了,而且研究该蛋白是否是罪魁祸首也花费了三年时间。对于家庭而言,可以通过进行遗传性检测来确保家族女性中是否携带这种蛋白质,这或许为控制疾病的遗传带来帮助。未来研究者计划在20年内抑制研究和蛋白质调节相关的一系列智力障碍。

A Noncoding, Regulatory Mutation Implicates HCFC1 in Nonsyndromic Intellectual Disability

The discovery of mutations causing human disease has so far been biased toward protein-coding regions. Having excluded all annotated coding regions, we performed targeted massively parallel resequencing of the nonrepetitive genomic linkage interval at Xq28 of family MRX3. We identified in the binding site of transcription factor YY1 a regulatory mutation that leads to overexpression of the chromatin-associated transcriptional regulator HCFC1. When tested on embryonic murine neural stem cells and embryonic hippocampal neurons, HCFC1 overexpression led to a significant increase of the production of astrocytes and a considerable reduction in neurite growth. Two other nonsynonymous, potentially deleterious changes have been identified by X-exome sequencing in individuals with intellectual disability, implicating HCFC1 in normal brain function.

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