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Developmental arrest of scNT-derived fetuses by disruption of the developing endometrial gland as a result of impaired trophoblast migration and invasiveness.

Dev. Dyn.2011 Mar;240(3):627-39. doi:10.1002/dvdy.22568. Epub 2011 Feb 08
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摘要


Somatic cell nuclear transfer (scNT)-derived pig placenta tissues of gestational day 30 displayed avascularization and hypovascularization. Most of the cytotrophoblast-like cells of the developing scNT-derived placenta villi were improperly localized or exhibited impaired migration to their targeting loci. Id-2, Met, MMP-9, and MCM-7 were barely detectable in the cytotrophoblast cells of the scNT-derived placenta villi. Active MMP-2 and MMP-9 expression was significantly down-regulated in the scNT-embryo transferred recipient uteri. scNT clones exhibited a hypermethylated pattern within the pig MMP-9 promoter region and the significance of GC box in the regulation of MMP-9 promoter activity. Marked apoptosis was observed in the developing endometrial gland of scNT-embryo transferred recipient uteri. Collectively, our data strongly indicated that early gestational death of scNT clones is caused, at least in part, by disruption of the developing endometrial gland as a result of impaired trophoblast migration and invasiveness due to the down-regulation of active MMP-9 expression.

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原始数据


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