GEO DataSets

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array; Expression profiling by array

Platforms:

GPL13534 GPL10558

56 Samples

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(Submitter supplied) We investigated the DNA methylation and gene expression of 20 chorionic villi samples from early onset preeclampsia placentas to 20 gestational age matched controls. From this we were able to see a widespread disregulation in DNA methylation across a subset of genes in the genome. This may help to elucidate the underlying biological problems that lead to early onset preeclampsia. We noted that there were DNA methylation changes in many genes of importance as well as in different genomic elements such as enhancers.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL10558

16 Samples

Download data: TXT

(Submitter supplied) We investigated the DNA methylation and gene expression of 20 chorionic villi samples from early onset preeclampsia placentas to 20 gestational age matched controls. From this we were able to see a widespread disregulation in DNA methylation across a subset of genes in the genome. This may help to elucidate the underlying biological problems that lead to early onset preeclampsia. We noted that there were DNA methylation changes in many genes of importance as well as in different genomic elements such as enhancers.

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL13534

40 Samples

Download data: TXT

(Submitter supplied) Preeclampsia is one of the leading causes of maternal death worldwide. While the root cause is still unknown, the underlying biology of the disorder is becoming more clear. We recently published a study showing large, significant differences in DNA methylation in 3rd trimester placental samples associated with early-onset preeclampsia (EOPET) compared to controls. In this study, to identify DNA methylation differences associated with preeclampsia that occur early in pregnancy and to further delineate common EOPET-associated differences, we utilized a genetic defect, trisomy 16 (T16), that is predisposing to preeclampsia. more...

Organism:

Homo sapiens

Type:

Methylation profiling by array

Platform:

GPL13534

30 Samples

Download data: TXT

(Submitter supplied) It is well known, but frequently overlooked, that low- and high-throughput molecular data may contain batch effects, i.e., systematic technical variation. Confounding of experimental batches with the variable(s) of interest is especially concerning, as a batch effect may then be interpreted as a biologically significant finding. An integral step towards reducing false discovery in molecular data analysis includes inspection for batch effects and application of computational tools to reduce this signal if present. more...

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL13534

59 Samples

Download data: IDAT, TXT

(Submitter supplied) Genome wide DNA methylation profiling of normal and preeclampsia placental samples. Illumina Infinium HumanMethylation450 BeadChip (450K array) was used to obtain DNA methylation profiles in placental samples. Samples included 16 samples from healthy uncomplicated pregnancies and 8 samples from pregnancies affected by preeclampsia.

Organism:

Homo sapiens

Type:

Methylation profiling by array

Platform:

GPL13534

24 Samples

Download data: IDAT

(Submitter supplied) Preeclampsia (PE), a hypertensive disorder of pregnancy, is hypothesized to be associated with, if not mechanistically related to abnormal placental function. However, the exact mechanisms regulating the pathogenesis of PE remain unclear. While many studies have investigated changes in gene expression in the PE placenta, the role of epigenetics in PE associated placental dysfunction remains unclear. more...

Organism:

Homo sapiens

Type:

Methylation profiling by array

Platform:

GPL13534

45 Samples

Download data: TXT

(Submitter supplied) Background: A small number of recent reports have suggested that altered placental DNA methylation may be associated with early onset preeclampsia. It is important that further studies be undertaken to confirm and develop these findings. We therefore undertook a systematic analysis of DNA methylation patterns in placental tissue from 24 women with preeclampsia and 24 with uncomplicated pregnancy outcome. more...

Organism:

Homo sapiens

Type:

Methylation profiling by array

Platform:

GPL8490

48 Samples

Download data: TXT

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Mus musculus

Type:

Expression profiling by high throughput sequencing; Methylation profiling by high throughput sequencing

Platforms:

GPL24247 GPL17021

18 Samples

Download data: TSV, TXT

(Submitter supplied) Background: The placenta is vital for fetal development and its contributions to various developmental issues, such as pregnancy complications, fetal growth restriction, and maternal exposure, have been extensively studied in mice. Contrary to popular belief, the placenta forms mainly from fetal tissue; therefore, it has the same biological sex as the fetus it supports. However, while placental function is linked to increased risks of pregnancy complications and neurodevelopmental diseases in male offspring in particular, the sex-specific epigenetic (e.g., DNA methylation) and transcriptomic features of the late-gestation mouse placenta remain largely unknown.Methods: We collected male and female mouse placentas at late gestation (E18.5, n = 3/sex) and performed next-generation sequencing to identify genome-wide sex-specific differences in transcription and DNA methylation. more...

Organism:

Mus musculus

Type:

Methylation profiling by high throughput sequencing

Platform:

GPL24247

6 Samples

Download data: TXT

(Submitter supplied) Background : The placenta is vital for fetal development and its contributions to various developmental issues, such as pregnancy complications, fetal growth restriction, and maternal exposure, have been extensively studied in mice. The placenta forms mainly from fetal tissue and therefore has the same biological sex as the fetus it supports. Extensive research has delved into the placenta’s involvement in pregnancy complications and future offspring development, with a notable emphasis on exploring sex-specific disparities. more...

Organism:

Mus musculus

Type:

Methylation profiling by high throughput sequencing

Platform:

GPL17021

6 Samples

Download data: TXT

(Submitter supplied) Background: The placenta is vital for fetal development and its contributions to various developmental issues, such as pregnancy complications, fetal growth restriction, and maternal exposure, have been extensively studied in mice. Contrary to popular belief, the placenta forms mainly from fetal tissue; therefore, it has the same biological sex as the fetus it supports. However, while placental function is linked to increased risks of pregnancy complications and neurodevelopmental diseases in male offspring in particular, the sex-specific epigenetic (e.g., DNA methylation) and transcriptomic features of the late-gestation mouse placenta remain largely unknown.Methods: We collected male and female mouse placentas at late gestation (E18.5, n = 3/sex) and performed next-generation sequencing to identify genome-wide sex-specific differences in transcription and DNA methylation. more...

Organism:

Mus musculus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL24247

6 Samples

Download data: TSV

(Submitter supplied) Preeclampsia (PE) is a complex, heterogeneous disorder of pregnancy, demonstrating considerable variability in observed maternal symptoms and fetal outcomes. We recently identified five clusters of placentas within a large gene expression microarray dataset (N=330, GSE75010), of which four contained a substantial number of PE samples. However, while transcriptional analysis of placentas can subtype patients, we hypothesized that the addition of epigenetic information should reveal gene regulatory mechanisms behind the distinct PE pathologies. more...

Organism:

Homo sapiens

Type:

Expression profiling by array; Methylation profiling by genome tiling array

Platforms:

GPL6244 GPL13534

96 Samples

Download data: CEL, CSV, IDAT, TXT

(Submitter supplied) Preeclampsia (PE) is a complex, heterogeneous disorder of pregnancy, demonstrating considerable variability in observed maternal symptoms and fetal outcomes. We hypothesized that this heterogeneity is due to the existence of multiple molecular forms of PE. To address our hypothesis, we created a large (N=330) human placental microarray data set consisting of seven previously published studies (GSE30186, GSE10588, GSE24129, GSE25906, GSE43942, GSE4707, and GSE44711) and 157 highly annotated samples from a BioBank (below). more...

Organism:

Homo sapiens

Type:

Expression profiling by array; Third-party reanalysis

Platform:

GPL6244

157 Samples

Download data: CEL, CSV

(Submitter supplied) Pre-eclampsia is one of the most serious pregnancy-associated disorders, and is defined by hypertension (systolic blood pressure higher than 140mmHg or diastolic blood pressure higher than 90mmHg) with proteinuria (more than 0.3g/day). It is not a simple complication of pregnancy, but is rather a syndrome of multiple organ failure involving the liver, kidney, and lung, as well as coagulatory and neural systems. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Dataset:

GDS2080

Platform:

GPL1708

14 Samples

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Analysis of placentas from patients with early or late onset severe preeclampsia. Preeclampsia is a serious pregnancy-associated disorder characterized by hypertension and proteinuria. Results provide insight into the pathogenesis of preeclampsia.

Organism:

Homo sapiens

Type:

Expression profiling by array, log10 ratio, 3 disease state sets

Platform:

GPL1708

Series:

GSE4707

14 Samples

Download data

(Submitter supplied) Preeclampsia (PE), a maternal hypertensive disorder, and intrauterine growth restriction (IUGR), pathologically poor fetal growth, often co-occur and are associated with placental insufficiency (PI). PI is more common in early-onset PE (EOPE) than late-onset PE (LOPE). However, the relationship between these disorders remains unclear. While DNA methylation (DNAm) alterations have been previously identified in PE and IUGR, few studies validated the findings in an independent cohort. more...

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL13534

102 Samples

Download data: CSV, IDAT

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Homo sapiens

Type:

Expression profiling by array; Methylation profiling by genome tiling array

Platforms:

GPL13534 GPL16686

72 Samples

Download data: CEL

(Submitter supplied) Placental Tissue Samples from 36 women (17 normotensive women, denoted with a P, and 19 preeclamptic women, denoted with a Q) were analyzed for differenital methylation Preeclamptic womene were compared direclty to normotensive women controlling for gestational age, race, maternal age, and baby sex

Organism:

Homo sapiens

Type:

Methylation profiling by genome tiling array

Platform:

GPL13534

36 Samples

Download data: TXT

(Submitter supplied) Placental Tissue Samples from 36 women (17 normotensive women, denoted with a P, and 19 preeclamptic women, denoted with a Q) were analyzed for differenital methylation Preeclamptic womene were compared direclty to normotensive women controlling for gestational age, race, maternal age, and baby sex

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL16686

36 Samples

Download data: CEL