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Lack of aneuploidy for chromosomes 15, 16, and 18 in placentas from small-for-gestational-age liveborn infants.

Abstract：

OBJECTIVE:The purpose of this study was to investigate the frequency of confined placental mosaicism (CPM) in placentas from liveborn infants. STUDY DESIGN:A retrospective analysis of 51 placentas from small-for-gestational-age (SGA), live born infants (birthweight below 5th centile), and 45 placentas from normally grown infants at term was performed. Aneuploidy for chromosomes 15, 16, and 18 was analyzed with QF-PCR (polymorphic markers) and FISH (centromeric probes). RESULTS:No trisomic sample was detected with either method. FISH revealed 1 case of monosomy 16 in the SGA group, which was not confirmed by PCR. On the other hand, PCR analysis showed allelic imbalances, ie, deviation of the 1:1 peak ratio > 20%, in 5 cases (4 in the SGA and 1 in the control group; P = .157). CONCLUSION:Trisomic CPM in liveborn SGA infants is much less frequent than previously appreciated. The occurrence and eventual biologic significance of the observed allelic imbalances needs to be further investigated.

journal_name

Am J Obstet Gynecol

journal_title

American journal of obstetrics and gynecology

authors

Papadogiannakis N,Iwarsson E,Taimi T,Zaphiropoulos PG,Westgren M

doi

10.1016/j.ajog.2007.08.027

subject

Has Abstract

pub_date

2008-02-01 00:00:00

pages

231.e1-7

issue

2

eissn

0002-9378

issn

1097-6868

pii

S0002-9378(07)00993-3

journal_volume

198

pub_type

杂志文章

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