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目的 评价 S C A1 、 S C A2 、 S C A3/ M J D、 S C A6 、 S C A7 和 D R P L A 的 C A G 三核苷酸异常扩增突变[( C A G)n] ,在中国人遗传性脊髓小脑型共济失调(spinocerebellar ataxia , S C A) 患者的分布频率。方法经聚合酶链反应、变性聚丙烯酰胺凝胶电泳和银染显带技术,检测分析了85 个中国人常染色体显性遗传 S C A 家系( 其中患者167 例) 和37 例散发 S C A 患者的 S C A1 、 S C A2 、 S C A3/ M I D、 S C A6 、 S C A7 、 D R P L A( C A G)n 。结果 在85 个 S C A 家系中,4 个 S C A 家系7 例患者有 S C A1( C A G)n 突变,5 个 S C A 家系12 例患者有 S C A2( C A G)n 突变,41 个 S C A 家系83 例患者有 S C A3/ M I D( C A G)n 突变,阳性率分别为470 % 、588 % 、4823 % ,未发现 S C A6 、 S C A7 、 D R P L A( C A G) n 突变。散发型 S C A 患者的 S C A1 、 S C A2 、 S C A3/ M J D、 S C A6 、 S C A7 、 D ?
Objective To evaluate the aberrant amplification of CAG trinucleotide amplification of SCAl, CSC2, SCC3 / JMD, SCA6, SCA7 and DRPLA [(CAG) n ], The distribution frequency in Chinese patients with spinocerebellar ataxia (SCC). METHODS: Eighty-five Chinese autosomal dominant S C A pedigrees (including 167 patients) and 37 SACs were dissected and analyzed by polymerase chain reaction, denaturing polyacrylamide gel electrophoresis and silver staining. Patient’s S C A1, S C A2, S C A3 / M I D, S C A6, S C A7, D R P L A (C A G) n. Results Among the 85 S C A pedigrees, 7 patients with 4 S C A pedigrees had S C A1 (C A G) n mutations and 12 patients with 5 S C A pedigrees had S C A2 (C A G) n Mutation, 41 patients with S C A family of 83 patients with S C A3 / M I D (C A G) n mutation, the positive rates were 470%, 588%, 4823%, no found S C A6, S C A7, D R P L A (C A G) n mutations. S C A1, S C A2, S C A3 / M J D, S C A6, S C A7, D?