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    • 1. 发明公开
    • Non-invasive detection of fetal genetic traits
    • Nicht invasiver Nachweisfötalergenetischer Merkmale
    • EP1524321A1
    • 2005-04-20
    • EP03405742.2
    • 2003-10-16
    • Hahn, Sinuhe, Dr.Zimmermann, BernhardHolzgreve, Wolfgang, Prof.Li, Ying
    • Hahn, Sinuhe, Dr.Zimmermann, BernhardHolzgreve, Wolfgang, Prof.Li, Ying
    • C12Q1/68
    • C12Q1/6883C12Q1/6806C12Q2600/156C12Q2565/125
    • Blood plasma of a pregnant woman contains both fetal and maternal circulatory extracellular DNA, the latter forming the major part (generally > 90%) thereof. The majority of the circulatory extracellular fetal DNA has now been found to have a small size of approximately 500 base pairs or less whereas the majority of the circulatory extracellular maternal DNA has a size greater than approximately 500 base pairs. Separation of circulatory extracellular DNA fragments which are smaller than approximately 500 base pairs provides a possibility to enrich for fetal DNA sequences from the vast bulk of circulatory extracellular maternal DNA.
      There is thus provided a sample of the blood plasma or serum (which preferably is substantially cell-free) of a pregnant woman in which extracellular DNA comprising 500 base pairs or less is enriched; the manufacture of such sample by subjecting a sample of the blood plasma or serum of a pregnant woman to a size separation so as to enrich extracellular DNA comprising 500 base pairs or less; and the use of such sample for the non-invasive detection of fetal genetic traits.
    • 孕妇的血浆含有胎儿和母体的循环细胞外DNA,后者形成主要部分(通常> 90%)。 现在已经发现大多数循环细胞外胎儿DNA具有约500个碱基对或更小的小尺寸,而大多数循环细胞外母体DNA具有大于约500个碱基对的大小。 小于约500碱基对的循环细胞外DNA片段的分离提供了从大量循环细胞外母体DNA中丰富胎儿DNA序列的可能性。 因此,提供了富含500碱基对或更少的胞外DNA的孕妇血浆或血清(优选基本上不含细胞)的样品; 通过对怀孕妇女的血浆或血清样品进行大小分离以富集包含500个碱基对或更少的细胞外DNA的方式制备这种样品; 以及使用这种样品进行胎儿遗传性状的非侵入性检测。