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36例胎儿染色体相互易位表型效应的探讨 被引量:5

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摘要 目的探讨胎儿染色体相互易位的表型效应。方法对7859例行介入性产前诊断的胎儿进行染色体核型分析和超声检查。结果在7859例产前标本中,共检出胎儿染色体相互易位36例,检出率为0.46%,其中超声波检查发现表型异常7例。29例为遗传自父母的易位(80.56%),而超声波检出表型异常占6.90%(2/29)。7例为新发易位,而表型异常率为71.43%(5/7)。新发易位胎儿的表型异常率高于遗传性相互易位(P〈0.05)。80.56%(58/72)的易位断裂点位于G带。7例表型异常胎儿的14个染色体断裂点中有13个位于浅带。3例X-常染色体相互易位胎儿表型均异常。结论胎儿染色体相互易位的表型评估可参考易位染色体的起源,易位染色体的类型、断裂点的位置、以及断裂点附近是否包含基因等信息。
出处 《中华医学遗传学杂志》 CAS CSCD 北大核心 2012年第3期364-366,共3页 Chinese Journal of Medical Genetics
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