1例染色体平衡易位型Prader-Willi综合征的细胞分子遗传学诊断和发病机制研究  

Genetic diagnosis and pathogenesis of a case of Prader-willi syndrome

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作  者:杨晓[1] 王艳[1] 彭薇[1] 刘欣[1] 马宁[1] 李昊[1] 

机构地区:[1]北京军区总医院附属八一儿童医院生物发育学实验室,北京100700

出  处:《中国儿童保健杂志》2014年第1期110-112,共3页Chinese Journal of Child Health Care

摘  要:目的探讨l例Prader—Willi综合征(Prader-willi syndrome,PWS)患儿的遗传学诊断及发病机制。方法对患儿的血样本进行染色体核型分析,采用甲基化特异性聚合酶链反应(methylation—specific PCR,MSPCR)及多重连接探针扩增(MS-multiplex ligation—dependent probe amplification,MS-MLPA)技术对患儿的DNA样本进行基因分析。结果该患儿染色体核型45,XY,-5,-15,t(5,15)(q34q13),甲基化特异性PCR(MS-PCR)监测到特异性PWS相关基因的甲基化,确诊该患儿为PWS患者。进一步MS-MLPA证实PWS是由于染色体的平衡易位导致父源性15q11~q13区域的缺失所致。结论细胞分子遗传学实验对PWS的临床诊断以及分子遗传基础的分析都具有积极的作用。Objective To expore genetic diagnosis and pathogenesis for one case of Prader-willi syndrome(PWS) patient with chromosomal balance-translocation. Method Chromosome karyotype analysis and methylation-specific polymerase chain reaction (MSPCR) and multiplex ligation-dependent probe amplifi -cation(MS*MLPA) were applied for detecting the genetic disorder and analyzing pathogenesis of patient. Results The result of chromosome karyotype was 45, X Y, 5,-15, t (5,15) (q34q13). The patient was diagnosed with PWS by MS-PCR. Further MS-MLPA comfirmed PWS was due to paternal deletion in 15q11-13 region. Conclusion The cellular and molecular genetics experiments are crucial in the clinical diagnosis and molecular genetic basis of PWS.

关 键 词:染色体平衡易位 PraderWilli综合征 甲基化特异性PCR 甲基化特异性MLPA 

分 类 号:R722[医药卫生—儿科]

 

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