The authors report the unusual clinical and neurophysiologic features of a sporadic case of a boy carrying an 806delG mutation on the MECP2 gene. A 28- month- old boy was examined for severe developmental delay, seizu...The authors report the unusual clinical and neurophysiologic features of a sporadic case of a boy carrying an 806delG mutation on the MECP2 gene. A 28- month- old boy was examined for severe developmental delay, seizures, microcephaly, breathing dysfunction, and spontaneous and evoked myoclonic jerks of upper limbs. Neurophysiologic study proved the corticalorigin of myoclonus; however, it was not associated with signs of cortical hyperexcitability. 3- Methoxy- 4- hydroxy- phenyleth- ylene glycol and valine concentrations were low in CSF.展开更多
目的通过对甲基化CpG结合蛋白2(mehty1-Cp G binding protein 2,MECP2)基因的突变分析,对1例典型的Rett综合征患儿进行基因诊断,并为该家庭提供遗传咨询。方法采用聚合酶链反应和DNA直接测序对先证者及其父母MECP2基因的4个外显子进行...目的通过对甲基化CpG结合蛋白2(mehty1-Cp G binding protein 2,MECP2)基因的突变分析,对1例典型的Rett综合征患儿进行基因诊断,并为该家庭提供遗传咨询。方法采用聚合酶链反应和DNA直接测序对先证者及其父母MECP2基因的4个外显子进行序列分析,同时对患儿进行染色体核型分析以排除染色体异常。结果患儿核型正常。针对MECP2基因进行突变分析发现患者存在c.473C>T(T158M)杂合突变,其父母未检测到该突变。结论错义突变T158M是导致该RETT家系患者临床表型的主要原因,通过对RETT家系个体Mecp2基因分析可对REET家系进行有效的遗传咨询。展开更多
Rett综合征(Rett syndrome)是一种X连锁显性遗传神经发育退行性疾病,发病率为1/(10000~15000)[1]。X染色体上甲基化CpG结合蛋白2(methyl-CpG binding protein 2,MECP2)基因缺失突变是引起Rett综合征最常见的原因,该基因定位于Xq28染色体...Rett综合征(Rett syndrome)是一种X连锁显性遗传神经发育退行性疾病,发病率为1/(10000~15000)[1]。X染色体上甲基化CpG结合蛋白2(methyl-CpG binding protein 2,MECP2)基因缺失突变是引起Rett综合征最常见的原因,该基因定位于Xq28染色体上[2-3]。该病多为新生突变,家族遗传少见;多见于女性,男性儿童罕见[4]。临床特征为6~18月龄开始起病,早期运动功能、智力发育正常,渐出现手部刻板动作,已获得手部功能丧失、智力发育倒退或低下[5],目前Rett综合征诊断主要根据临床表型及基因检测分析。现报道郑州大学附属儿童医院神经内科确诊的1例MECP2基因新发无义突变所致女性Rett综合征,结合文献总结其临床表现,分析实验室及分子遗传学特征,了解其基因型与表型的相关性,旨在提高临床医生对本病的进一步认识。展开更多
文摘The authors report the unusual clinical and neurophysiologic features of a sporadic case of a boy carrying an 806delG mutation on the MECP2 gene. A 28- month- old boy was examined for severe developmental delay, seizures, microcephaly, breathing dysfunction, and spontaneous and evoked myoclonic jerks of upper limbs. Neurophysiologic study proved the corticalorigin of myoclonus; however, it was not associated with signs of cortical hyperexcitability. 3- Methoxy- 4- hydroxy- phenyleth- ylene glycol and valine concentrations were low in CSF.
文摘目的通过对甲基化CpG结合蛋白2(mehty1-Cp G binding protein 2,MECP2)基因的突变分析,对1例典型的Rett综合征患儿进行基因诊断,并为该家庭提供遗传咨询。方法采用聚合酶链反应和DNA直接测序对先证者及其父母MECP2基因的4个外显子进行序列分析,同时对患儿进行染色体核型分析以排除染色体异常。结果患儿核型正常。针对MECP2基因进行突变分析发现患者存在c.473C>T(T158M)杂合突变,其父母未检测到该突变。结论错义突变T158M是导致该RETT家系患者临床表型的主要原因,通过对RETT家系个体Mecp2基因分析可对REET家系进行有效的遗传咨询。
文摘Rett综合征(Rett syndrome)是一种X连锁显性遗传神经发育退行性疾病,发病率为1/(10000~15000)[1]。X染色体上甲基化CpG结合蛋白2(methyl-CpG binding protein 2,MECP2)基因缺失突变是引起Rett综合征最常见的原因,该基因定位于Xq28染色体上[2-3]。该病多为新生突变,家族遗传少见;多见于女性,男性儿童罕见[4]。临床特征为6~18月龄开始起病,早期运动功能、智力发育正常,渐出现手部刻板动作,已获得手部功能丧失、智力发育倒退或低下[5],目前Rett综合征诊断主要根据临床表型及基因检测分析。现报道郑州大学附属儿童医院神经内科确诊的1例MECP2基因新发无义突变所致女性Rett综合征,结合文献总结其临床表现,分析实验室及分子遗传学特征,了解其基因型与表型的相关性,旨在提高临床医生对本病的进一步认识。
