Gene expression profiling of placental villi from intrauterine and tubal ectopic pregnancies
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ABSTRACT: The tubal ectopic pregnancy (TEP) is a severe pregnancy complication accounted for 10-15% pregnancy-related deaths owing to the implantation and growth of embryos in fallopian tubes. Placental villi from TEP exhibit significant difference compared with that from intrauterine pregnancy (IP) in total volumes, trophoblast differentiation and intravillous vascularization. To investigate the difference in expression profiles of placental villi from IP and TEP, placental villi were collected from each phenotype, separated from maternal tissues and analyzed by high-throughput sequencing. generated a mouse model in which p53 is activated in neural crest cells due to the expression of a mutant p53 protein (p53-25,26) that can bind to and stabilize wild-type p53. Here, we performed gene expression profiling on neural crest cells isolated from these embryos, to identify the transcriptional response to p53 activation during embryogenesis.
Project description:The tubal ectopic pregnancy (TEP) is a severe pregnancy complication accounted for 10-15% pregnancy-related deaths owing to the implantation and growth of embryos in fallopian tubes. Placental villi from TEP exhibit significant difference compared with that from intrauterine pregnancy (IP) in total volumes, trophoblast differentiation and intravillous vascularization. To investigate the difference in expression profiles of placental villi from IP and TEP, placental villi were collected from each phenotype, separated from maternal tissues and analyzed by high-throughput sequencing. generated a mouse model in which p53 is activated in neural crest cells due to the expression of a mutant p53 protein (p53-25,26) that can bind to and stabilize wild-type p53. Here, we performed gene expression profiling on neural crest cells isolated from these embryos, to identify the transcriptional response to p53 activation during embryogenesis.
Project description:The tubal ectopic pregnancy (TEP) is a severe pregnancy complication accounted for 10-15% pregnancy-related deaths owing to the implantation and growth of embryos in fallopian tubes. Placental villi from TEP exhibit significant difference compared with that from intrauterine pregnancy (IP) in total volumes, trophoblast differentiation and intravillous vascularization. To investigate the difference in expression profiles of placental villi from IP and TEP, placental villi were collected from each phenotype, separated from maternal tissues and analyzed by high-throughput sequencing.
Project description:Whole-transcriptome profiles of individual human placental villi samples from twenty-five (25) Indian women with normal pregnancies during 6- to 8-weeks of gestation were examined using human whole genome expression arrays (NimbleGen 135K). The present study focused on the whole-transcriptome profiling using NimbleGen135K (070925_HG18_exp__12X135K) human whole genome expression arrays of individual human placental villi samples obtained from twenty-five (25) proven-fertile women bearing normal pregnancies voluntarily terminated between 6- and 8-weeks of gestation. Gestational age was estimated from menstrual history, physical and ultrasonographic evaluation. No case of complicated pregnancy from infection, and other significant fetal and maternal clinical indications was included. These twenty five (25) samples include biological replicates of 6, 7 and 8 weeks placental villi samples.
Project description:Pregnancy loss is often caused by chromosomal abnormalities of the conceptus. The prevalence of these abnormalities and the allocation of (ab)normal cells in embryonic and placental lineages during intrauterine development remain elusive. We analyzed 1,745 spontaneous pregnancy losses and found that roughly half (50.4%) of the products of conception (POC) were karyotypically abnormal, with maternal and paternal age independently contributing to the increased genomic aberration rate in pregnancy loss. We applied genome haplarithmisis to a subset of 94 pregnancy losses with normal parental and POC karyotypes. Genotyping of parental DNA as well as POC extraembryonic mesoderm and chorionic villi DNA, representing embryonic and trophoblastic tissues, enabled characterization of the genomic landscape of both lineages. Of these pregnancy losses, 35.1% had chromosomal aberrations not previously detected by karyotyping, increasing the rate of aberrations of pregnancy losses to 67.8% by extrapolation. In contrast to viable pregnancies where mosaic chromosomal abnormalities are often restricted to chorionic villi, such as confined placental mosaicism, we found a higher degree of mosaic chromosomal imbalances in extraembryonic mesoderm rather than chorionic villi in pregnancy losses. Our results stress the importance of scrutinizing the full allelic architecture of genomic abnormalities in pregnancy loss to improve clinical management and basic research of this devastating condition.
Project description:The relationship between oncogenesis and embryo development are surprised similarity, early placental villi development from 6 weeks to 10 weeks of pregnancy were profiled using microarrays. Through comparative villi and mature placenta data, we identified villi-specific genes that were highly expressed in villus. The large fraction of villi-specific genes dysregulated in transcriptional level across tumors and most of villi-specific genes up-regulated in human cancers. Then by the GO enrichment results, we selected 5 immune-related genes, 6 proliferation-related genes, 8 focal adhesion-related genes that were found to have reported with genomic alterations. The expression of three group genes predicted poor prognosis of a subset of tumors. Our strategy provided a fresh idea for discovering the novel prognostic biomarkers of tumors.
Project description:The aim of this microarray experiment was to compare the overall transcriptomic profile of human placenta derived trophoblast organoid cultures with its tissue of origin, human placental villi. As the placental villi contains both trophoblast and stromal populations, we have included placenta derived stromal cultures in this comparison.
Project description:The project aimed to determine proteomics changes in chorionic villi from patients suffering from unexplained early recurrent pregnancy loss (RPL) compared to women undergoing elective abortions. Comparative proteomics analysis by label-free data-independent LC-MS/MS was performed on fresh frozen chorionic villi from 13 RPL patients and 10 controls. Samples from EPL patients were preselected to include only patients with 2 or more recurrent pregnancy losses (RPL), no previous live birth, gestational week from 6-10 weeks and excluded fetal chromosomal abnormalities. Control samples were from women without history of previous miscarriage, ectopic pregnancy or preterm delivery, with at least one live born child, at 6-10 gestational weeks and without fetal chromosomal abnormalities. Patients and controls were between 24-44 years with no significant differences among groups regarding age (Median age RPL = 29; Median age Controls = 34; Mann–Whitney U-test p = 0.078). The mean gestational weak (GW) was 7.9±0.8 weeks in the RPL group and 8.3±1.2 weeks in the control group, without statistically significant difference between groups (Median GW RPL = 8; Median GW Controls = 8; Mann–Whitney U-test p = 0.484).