PLoS One:SMPX的一个新的移码突变引起一种不常见的X连锁的非综合征听力损失

2017-06-03 AlexYang MedSci原创

X连锁的听力损伤是最不常见的遗传性听力损失(HL)形式,并且只占据所有案例的一小部分。最近,研究人员在一个四世同堂的中国人家庭中,调查了X连锁遗传性感官听力损失的原因。研究发现,通过外显子组测序技术,研究人员在SMPX中发现了一个新的重复变异(c.217dupA, p.Ile73Asnfs*5)。该移码突变可能导致了SMPX蛋白的过早截断,并且与听力损失表型共分离,而在295名正常的对照中并没有发

X连锁的听力损伤是最不常见的遗传性听力损失(HL)形式,并且只占据所有案例的一小部分。最近,研究人员在一个四世同堂的中国人家庭中,调查了X连锁遗传性感官听力损失的原因。

研究发现,通过外显子组测序技术,研究人员在SMPX中发现了一个新的重复变异(c.217dupA, p.Ile73Asnfs*5)。该移码突变可能导致了SMPX蛋白的过早截断,并且与听力损失表型共分离,而在295名正常的对照中并没有发现该情况。另外,研究人员在338名患有非综合征听力损失的中国病人中利用Sanger测序进行了SMPX的编码外显子和两侧内含子的亚群筛选。并且,在先天性耳聋额外的分散案例中,在SMPX中鉴定了另外两个潜在的替换(c.238C>A and c.55A>G)。

最后,研究人员指出,该研究首先报道了SMPX在中国人口中的角色,并且在SMPX中鉴定了一个新的移码突变,该突变不仅能引起非综合征晚期渐进性听力损失,而且同样能引起先天性听力损伤。总之,该研究扩展了SMPX基因的突变谱和表型谱。

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    2017-06-05 ysjykql
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