摘要
目的 通过对先天性高胰岛素血症患儿家系ABCC8、KCNJ11及GLUD1基因的突变分析，探讨先天性高胰岛素血症的遗传发病机制。方法选取2008年11月至2012年2月北京儿童医院收治的11例临床诊断为先天性高胰岛素血症的患儿及其家系为研究对象，其中男7例，女4例。应用PCRDNA直接测序技术对11个患儿的家系ABCC8基因的39个外显子区、KCNJ11基因的非翻译区及外显子区以及GLUD1基因的第6、7、10、11、12外显子区进行测序分析。结果11例患儿家系中，病例1及其父亲携带ABCC8基因P629PfsX17杂合突变；病例4及其父亲携带ABCC8基因W288X杂合突变；病例5携带ABCC8基因A640V和Q1196x杂合突变，而其父亲仅携带ABCC8基因Q1196x杂合突变；病例6及其父亲携带GLUD1基因R269H杂合突变；上述4例患儿母亲相应基因位点均正常。另7例患儿及其父母并未检测出上述3种基因突变。结论ABCC8基因突变是导致中国儿童先天性高胰岛素血症发病的主要致病机制。在中国人中，ABCC8基因的P629PfsX17、W288X、A640V、Q1196x杂合突变，GLUD1基因的R269H杂合突变可以导致先天性高胰岛素血症的发生，其遗传方式可为父系遗传或新生突变。
Objective To explore the ABCC8, KCNJll, and GLUD1 gene mutations of the 11 patients diagnosed as congenital hyperinsulinism（CHI）. Methods A total of 11 CHI children hospitalized in Beijing Children＇s Hospital from November 2008 to February 2012 and their parents were chosen as the study subjects. Direct sequencing of PCR-DNA was used to analyze the 39 exons of ABCC8 gene, non- translational region and exon of KCNJll gene and 6, 7, 10, 11 and 12 exons of GLUD1 gene. Results An P629PfsX17 heterozygous mutation of ABCC8 gene was detected in case 1 and his father, an W288X heterozygous mutation of ABCC8 gene was detected in case 4 and his father, A640V and Q1196X mutations in ABCC8 gene in case 5 whose father only carried the Q1196X mutation. In case 6 and his father, an R269H mutation was found in GLUD1 gene. The genotype of 4 children＇s mothers was normal. No mutations were found in other 7 patients and their parents. Conclusions The ABCC8 gene mutations are the main pathogenic mechanisms of Chinese children with CHI. In Chinese, P629PfsX17, W288X, A640V and Q1196X heterozygous mutation of ABCC8 gene and R269H heterozygous mutation of GLUD1 gene may lead to CHI. The inheritance mode of the mutations may be paternally or de novo.
出处
《中华医学杂志》
CAS
CSCD
北大核心
2013年第14期1089-1092,共4页
National Medical Journal of China
基金
北京市卫生系统高层次卫生技术人才培养计划（2011-3-051）
关键词
高胰岛素血症
钾通道
谷氨酸脱氢酶
Hyperinsulinism
Potassium channels
Glutamate dehydrogenase
