A previous study of European Caucasian patients with sporadic amyotrophic lateral sclerosis demonstrated that a polymorphism in the microtubule-associated protein Tau （MAPT） gene was significantly associated with sp...A previous study of European Caucasian patients with sporadic amyotrophic lateral sclerosis demonstrated that a polymorphism in the microtubule-associated protein Tau （MAPT） gene was significantly associated with sporadic amyotrophic lateral sclerosis pathogenesis. Here, we tested this association in 107 sporadic amyotrophic lateral sclerosis patients and 100 healthy controls from the Chinese Han population. We screened the mutation-susceptible regions of MAPT- the 3＇ and 5＇ untranslated regions as well as introns 9, 10, 11, and 12 - by direct sequencing, and identified 33 genetic variations. Two of these, 105788 A 〉 G in intron 9 and 123972 T 〉 A in intron 11, were not present in the control group. The age of onset in patients with the 105788 A 〉 G and/or the 123972 T 〉 A variant was younger than that in patients without either genetic variation. Moreover, the pa- tients with a genetic variation were more prone to bulbar palsy and breathing difficulties than those with the wild-type genotype. This led to a shorter survival period in patients with a MAPT genetic variant. Our study suggests that the MAPT gene is a potential risk gene for sporadic amyotrophic lateral sclerosis in the Chinese Han population.展开更多
目的:报道1例微管相关蛋白-tau(microtubule-associated protein tau,MAPT)基因突变所致行为变异型额颞叶痴呆家系患者的临床表现、神经系统查体、家系图、神经心理学检测、头颅磁共振表现及基因检查特征,并进行文献复习。方法:收集行...目的:报道1例微管相关蛋白-tau(microtubule-associated protein tau,MAPT)基因突变所致行为变异型额颞叶痴呆家系患者的临床表现、神经系统查体、家系图、神经心理学检测、头颅磁共振表现及基因检查特征,并进行文献复习。方法:收集行为变异型额颞叶痴呆(behavioral variant frontotemporal dementia,bvFTD)患者1例,进行询问病史、神经系统查体和神经心理学检查,并行常规化验、头颅磁共振表现及基因检查,并复习相关文献。结果:该例患者表现为突出的性格改变、行为异常下降,症状进行性加重,家族中两人有类似临床症状。患者头颅MRI提示双侧颞前极和顶叶对称性脑萎缩,海马萎缩较轻。基因检查提示MAPT基因c.915+16C>T杂合突变。报道bvFTD以社会行为异常、性格改变和认知功能持续性下降为主要表现,是FTLD中遗传性最强的亚型,MAPT基因是其最常见的致病基因之一。结论:本例bvFTD患者存在MAPT基因c.915+16C>T杂合突变,从而引发神经变性。对于临床诊断bvFTD的患者应完善基因学检测。展开更多
基金funded by the National Natural Science Foundation of China,No.30560042 and 81260194Jiangxi Provincial Health Bureau of Science and Technology Program,No.20111028
文摘A previous study of European Caucasian patients with sporadic amyotrophic lateral sclerosis demonstrated that a polymorphism in the microtubule-associated protein Tau （MAPT） gene was significantly associated with sporadic amyotrophic lateral sclerosis pathogenesis. Here, we tested this association in 107 sporadic amyotrophic lateral sclerosis patients and 100 healthy controls from the Chinese Han population. We screened the mutation-susceptible regions of MAPT- the 3＇ and 5＇ untranslated regions as well as introns 9, 10, 11, and 12 - by direct sequencing, and identified 33 genetic variations. Two of these, 105788 A 〉 G in intron 9 and 123972 T 〉 A in intron 11, were not present in the control group. The age of onset in patients with the 105788 A 〉 G and/or the 123972 T 〉 A variant was younger than that in patients without either genetic variation. Moreover, the pa- tients with a genetic variation were more prone to bulbar palsy and breathing difficulties than those with the wild-type genotype. This led to a shorter survival period in patients with a MAPT genetic variant. Our study suggests that the MAPT gene is a potential risk gene for sporadic amyotrophic lateral sclerosis in the Chinese Han population.
