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常染色体显性成人多囊肾病两家系PKD1、PKD2基因的突变鉴定

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常染色体显性成人多囊肾病两家系PKD1、PKD2基因的突变鉴定

余朝文

杨元

张思仲

   目的 鉴定两个常染色体显性成人多囊肾病家系的致病突变。方法 采用酚氯仿法提取家系成员及无亲缘关系的100名健康对照个体的外周血白细胞DNA,PCR扩增先证者致病基因PKD1、PKD2的所有外显子序列及其侧翼内含子剪切区域,直接测序确定DNA序列的变异。通过家系和正常对照的比较分析,对检测到的变异是否与疾病相关进行了初步探讨。结果 在两个家系检测到5个序列变异:PKD1:c.2469G>A,PKD1:c.5014_5015 delAG,PKD1:c.10529C>T,PKD2:c.568G>A和PKD2:c.2020-1_2020 delAG。其中PKD1:c.2469G>A和PKD2:c.2020-1_2020 delAG为新发现的变异。此外,检测到的移码突变和剪切突变未见于家系中健康成员及无亲缘关系的正常对照。结论 PKD1:c.5014_5015 delAG和PKD2:c.2020-1_2020 delAG分别为家系A和B的致病突变,且PKD2:c.2020-1_2020 delAG为先证者新发生的突变。

常染色体显性成人多囊肾病;PKD1基因;PKD2基因;新生突变

Identification of mutations in PKD1 and PKD2 genes in two Chinese families with autosomal dominant 

polycystic kidney disease

YU Chao-wen1YANG Yuan1ZHANG Si-zhong1,21 Department of 

Medical Genetics, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041 P.R. China ;

   2 Division of Human Morbid Genomics, State Key Laboratory of Biotherapy, Chengdu, Sichuan,610041 P.R. China

     Objective  To identify the responsible mutation of autosomal dominant polycystic kidney 

disease (ADPKD) in two Chinese families. Methods  Total genomic DNA of all available family members 

and 100 unrelated healthy controls was extracted from peripheral blood leukocytes using a standard phenol-

chloroform procedure.  All exons with intronic flanking sequences of the PKD1 and PKD2 genes in the probands were amplified by PCR. Mutations were detected directly by DNA sequencing. To evaluate the 

pathogenicity of the variations, family and control based analyses were performed. Results  Five sequence 

variants were identified in the two families including PKD1 :c. 2469G>A, PKD1 :c. 5014_5015delAG,

PKD1 :c. 10529C>T, PKD2 :c. 568G>A and PKD2 :c. 2020-1_2020delAG. Among them, PKD1 :c.2469G> A and PKD2 : c. 2020-1 _ 2020 delAG were novel mutations.  Furthermore, the frameshift and 

splicing site mutations detected in the affected individuals were not detected in their unaffected relatives and 

100 unrelated normal controls. Conclusion  PKD1 :c. 5014_5015delAG and PKD2 :c. 2020-1_2020delAG 

are the responsible mutations of family A and B, respectively, and PKD2 :c. 2020-1_2020delAG is a de novo 

mutation.

       autosomal dominant polycystic kidney disease;  PKD1 gene;  PKD2 gene;  de novo mutation

10. 3760/cma. j. issn. 1003-9406.2011.05.002

国家自然科学基金(30470960)

    作者单位:610041 成都,四川大学华西临床医学院医学遗传研究室(余朝文、杨元、张思仲),生物治疗国家重点实验室人类疾病基因组学

研究室(张思仲)

万方数据1.2方法

万方数据家系1中

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万方数据

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