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Application of touch FISH in the study of mosaic tetraploidy and maternal cell contamination in pregnancy losses.

Abstract：

PURPOSE:karyotype is a well established technique in the study of spontaneous miscarriages but is associated with selective overgrowth of maternal cells and other culture artefact (spp) such as tetraploidy, which could mask the true karyotype of the conceptus. METHODS:328 cases of pregnancy losses were studied by karyotype and Multiplex Ligation Dependent Probe Amplification technique. Touch FISH performed in non-cultured cells was used to evaluate the ploidy complement and sex discrepancies using centromeric probes for chromosomes X, Y and 18. RESULTS:touch FISH confirmed 13 cases of maternal contamination, identified a triploidy and a monosomy X. True tetraploidy was confirmed in 7/14 cases studied. CONCLUSION:touch FISH protocol is extremely accurate in the distinction of genuine mosaicism from tissue culture artifacts namely in cases with suspicion of tetraploidy and can be used to confirm maternal cell contamination in cases with sex discrepancy between karyotype and MLPA.

journal_name

J Assist Reprod Genet

journal_title

Journal of assisted reproduction and genetics

authors

Dória S,Lima V,Carvalho B,Moreira ML,Sousa M,Barros A,Carvalho F

doi

10.1007/s10815-010-9460-1

subject

Has Abstract

pub_date

2010-11-01 00:00:00

pages

657-62

issue

11

eissn

1058-0468

issn

1573-7330

journal_volume

27

pub_type

杂志文章

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