七例晚发型糖原贮积病Ⅱ型患者临床特征及基因突变分析

目的分析4个家系7例晚发型糖原贮积病Ⅱ型患者之临床特点和基因型,以提高对该病的认识。方法收集患者临床资料,并行酸性α-葡糖苷酶(GAA)基因突变分析。结果7例患者分别来自4个家系,年龄13-31岁、发病年龄6-17岁、初诊年龄12~29岁、明确诊断年龄12~30岁;首发症状为肢带肌萎缩、无力,酸性α-葡糖苷酶活性0~5.27nmol/(nag·h)。GAA基因突变分析共发现14种突变,其中2种为新突变位点(Q81X和c.1355_1356delC)、2种假缺陷等位基因位点(G576S和E689K)、8种多态性位点和2种已知的致病突变位点(W746C和D645E)。结论中国大陆地区对糖原贮积病Ⅱ...

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Published in中国现代神经疾病杂志 Vol. 14; no. 5; pp. 405 - 410
Main Author 杨娟 操基清 刘振华 詹益鑫 梁颖茵 莫桂玲 李亚勤 孙毅明 李敏子 利婧 张成
Format Journal Article
LanguageChinese
Published 南方医科大学珠江医院神经内科, 广州,510282%中山大学附属第一医院神经科, 广州,510080%510330,广州金域医学检验中心有限公司%中山大学附属第一医院保健科, 广州,510080 2014
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ISSN1672-6731
DOI10.3969/j.issn.1672-6731.2014.05.008

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Summary:目的分析4个家系7例晚发型糖原贮积病Ⅱ型患者之临床特点和基因型,以提高对该病的认识。方法收集患者临床资料,并行酸性α-葡糖苷酶(GAA)基因突变分析。结果7例患者分别来自4个家系,年龄13-31岁、发病年龄6-17岁、初诊年龄12~29岁、明确诊断年龄12~30岁;首发症状为肢带肌萎缩、无力,酸性α-葡糖苷酶活性0~5.27nmol/(nag·h)。GAA基因突变分析共发现14种突变,其中2种为新突变位点(Q81X和c.1355_1356delC)、2种假缺陷等位基因位点(G576S和E689K)、8种多态性位点和2种已知的致病突变位点(W746C和D645E)。结论中国大陆地区对糖原贮积病Ⅱ型之诊断时间存在明显的延误,提高医务人员的认识和理解将有助于改善患者预后。在明确诊断糖原贮积病Ⅱ型或判断预后时,应结合临床病史、酸性α-葡糖苷酶活性检测和GAA基因突变分析。糖原贮积病Ⅱ型之临床表型具有异质性,在GAA基因型相同的情况下,同一家系的不同个体间可存在疾病进程和严重程度的差异。
Bibliography:Objective In order to make a well understanding on glycogen storage disease type Ⅱ (GSD Ⅱ), this paper explored clinical features and genetic analysis of 7 patients with late-onset glycogen storage disease type Ⅱ. Methods Clinical data of 7 patients with late-onset glycogen storage disease type Ⅱ were collected and acid α-glucosidase (GAA) gene sequencing was performed. Results Seven patients who belong to 4 families were at the age of 13-31 years old. The first symptom occurred at 6-17 years old, and the age at first and definitive diagnosis was 12-29 and 12-30 years old, respectively. The initial symptoms were mostly related to limb girdle muscular atrophy and weakness. The GAA activity ranged from 0 to 5.27 nmol/(mg, h). Sequencing analysis revealed 14 sequence variants, including 2 novel mutations (Q81X and c.1355_1356de1C), 2 pseudodeficiency alleles (G576S and E689K), 8 polymorphic loci, and 2 sequence variants previously related with glycogen storage disease type Ⅱ pathogenesis (W746C and D645E). Concl
ISSN:1672-6731
DOI:10.3969/j.issn.1672-6731.2014.05.008