Free fetal DNA in maternal plasma in anembryonic pregnancies: confirmation that the origin is the trophoblast.

Abstract:

OBJECTIVE:To test the hypothesis that free fetal DNA (ffDNA) circulating in maternal plasma originates mainly from the placenta we studied ffDNA levels in anembryonic pregnancies. METHODS:Maternal blood samples were collected from 15 normal first-trimester pregnancies in which fetal sex was subsequently determined and nine patients with a diagnosis of anembryonic gestation (AG). The Y chromosome DYS14 gene was quantified by real-time quantitative PCR (RT-PCR) for the determination of fetal sex in both plasma and chorionic tissue samples. Fetal sex in chorionic tissue samples was also determined using quantitative fluorescence PCR (QF-PCR). RESULTS:The correct sex result was obtained from maternal plasma in all. Four AG pregnancies were female (DYS14 negative) results. In five of the AG cases, the chorionic tissue was found to be male (by both QF-PCR and RT-PCR which agreed) and positive male signal was found in maternal plasma by RT-PCR. There was no statistical difference between median free fetal DNA concentration in plasma between the AG male cases (148.3 GE/mL) and controls (145.8 GE/mL). CONCLUSION:Since ffDNA levels are normal in pregnancies without a fetus, the data support the hypothesis that the trophoblastic cells are the major source ffDNA in maternal plasma.

journal_name

Prenat Diagn

journal_title

Prenatal diagnosis

authors

Alberry M,Maddocks D,Jones M,Abdel Hadi M,Abdel-Fattah S,Avent N,Soothill PW

doi

10.1002/pd.1700

subject

Has Abstract

pub_date

2007-05-01 00:00:00

pages

415-8

issue

5

eissn

0197-3851

issn

1097-0223

journal_volume

27

pub_type

杂志文章
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    更新日期:2012-03-01 00:00:00

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    更新日期:2015-07-01 00:00:00

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    更新日期:2018-01-01 00:00:00

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    pub_type: 临床试验,杂志文章,随机对照试验

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    更新日期:2004-04-01 00:00:00

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    更新日期:2016-05-01 00:00:00

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    pub_type: 杂志文章,评审

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    更新日期:2010-07-01 00:00:00

  • Learning in medicine: chorionic villus sampling.

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    journal_title:Prenatal diagnosis

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    doi:

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    更新日期:2000-03-01 00:00:00

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    journal_title:Prenatal diagnosis

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    journal_title:Prenatal diagnosis

    pub_type: 杂志文章

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  • Immunoreactive trypsin level in fetoscopically-obtained cord sera of second trimester fetuses.

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    journal_title:Prenatal diagnosis

    pub_type: 杂志文章

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    pub_type: 杂志文章,评审

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    pub_type: 杂志文章

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  • Uniparental disomy in fetuses diagnosed with balanced Robertsonian translocations: risk estimate.

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    pub_type: 杂志文章

    doi:

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    更新日期:1998-04-01 00:00:00

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    pub_type: 杂志文章

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    authors: Saha E,Mullins EW,Paramasivam G,Kumar S,Lakasing L

    更新日期:2012-08-01 00:00:00

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    pub_type: 杂志文章

    doi:10.1002/pd.1970150514

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