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Chediak-Higashi综合征的分子遗传学研究进展 被引量:5

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摘要 Chediak-Higashi综合征(Chediak-Higashi syndmme,CHS)为一种罕见的常染色体隐性遗传性疾病,其特点表现为严重的免疫缺陷,不同程度的眼部皮肤白化病,出血倾向,进行性神经系统病变,其特异性诊断为粒细胞及其他组织细胞中出现巨大的溶酶体颗粒。加速期出现的时间是决定预后的关键因素。人CHS的致病基因-溶酶体运输调节因子基因(lysosomal trafficking regulator gene,LYST)定位于1q42,cDNA全长13.5kb,编码含3801个氨基酸的胞浆蛋白质。蛋白质截短检测法(protein truncationtest,PTT)为CHS截短突变提供了快速而有效的检测方法。CHS基因型与临床表型之间存在一定的相关关系,但也存在表型异质性。选择LYST基因所在染色体区域1q42内的多态性标记进行单体型分析将为CHS高危家系的产前诊断带来希望。
作者 姜俊 麻宏伟
出处 《国外医学(遗传学分册)》 2004年第1期51-53,共3页 Foreign Medical Sciences(Section of Genetics )
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