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三例临床非典型婴儿Prader-Willi综合征的遗传学分析

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摘要 目的探讨中国婴儿Prader-Willi综合征(Prader-Willi syndrome,PWS)的致病机制.联合应用单核苷酸多态性微阵列(single nucleotide polymorphism array,SNP array)及甲基化特异的多重连接探针扩增(methylation specific-multiplex ligation-dependent probe amplification,MS-MLPA)技术确诊3例临床非典型婴儿PWS.方法收集先证者的临床资料,首先对先证者进行SNP array检测,确定可能的致病变异,再应用MS-MLPA进行验证,最终确定致病机制.结果SNP array显示3例患儿均存在15号染色体非11.2-13区域的拷贝数中性的杂合性缺失,经MS-MLPA验证,确诊为PWS,机制为母源单亲二体(uniparental disomy,UPD),提示母源UPD在致病机制中占有更高比例.结论SNP array可以提高PWS的诊断效率.母源UPD在PWS的致病机制中可能占有更高的比例.
出处 《中华医学遗传学杂志》 CAS CSCD 2019年第10期1044-1046,共3页 Chinese Journal of Medical Genetics
基金 北京市科技计划课题(2171100000417020) 国家重点研发计划项目(2016YFC0905100).
作者简介 通信作者:陈倩,Email:chenqianxhl@163.com
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