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The nature and origin of binucleate cells in human preimplantation embryos: relevance to placental mesenchymal dysplasia
- Source :
- Reproductive biomedicine online. 22(4)
- Publication Year :
- 2010
-
Abstract
- Cleavage-stage embryos often have nuclear abnormalities, one of the most common being binucleate blastomeres, which may contain two diploid or two haploid nuclei. Biopsied cells from preimplantation genetic diagnosis (PGD) and preimplantation genetic screening (PGS) cycles were studied to determine the relative frequency of binucleate cells with two haploid versus two diploid nuclei. The frequency of mononucleate haploid biopsied blastomeres was also recorded. In the chromosomal PGD cycles 45.2% of the biopsied binucleate cells were overall diploid and 38.7% were overall tetraploid, compared with 50.0% and 29.2% for the PGS group, respectively. Placental mesenchymal dysplasia is a rare condition associated with intrauterine growth restriction, prematurity and intrauterine death. Recent work suggests that androgenetic diploid/haploid mosaicism may be a causal mechanism. There are two possible origins of haploid nuclei, either the cell contained only one parental genome initially or they may be derived from the cytokinesis of binucleate cells with two haploid nuclei. Binucleate formation therefore may be a way of doubling up the haploid genome, to produce diploid cells of androgenetic origin as seen in placental mesenchymal dysplasia.
- Subjects :
- Blastomeres
Placenta Diseases
Biology
Preimplantation genetic diagnosis
Placental Mesenchymal Dysplasia
Andrology
Mesoderm
Pregnancy
medicine
Humans
Blastocyst
Genetic Testing
Gametogenesis
In Situ Hybridization, Fluorescence
Preimplantation Diagnosis
Genetics
Cell Nucleus
Ploidies
fungi
Obstetrics and Gynecology
Embryo
Blastomere
Cell nucleus
medicine.anatomical_structure
Reproductive Medicine
Female
Ploidy
Developmental Biology
Subjects
Details
- ISSN :
- 14726491
- Volume :
- 22
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Reproductive biomedicine online
- Accession number :
- edsair.doi.dedup.....1550d9f82a322ed5d62b2c693fbfd863