Unknown,Transcriptomics,Genomics,Proteomics

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Effect of 10 or 25 days cortisol treatment on late gestation fetal septum

ABSTRACT: We have previously shown in sheep that 10 days of modest chronic increase in maternal cortisol result in fetal heart enlargement and Purkinje cell apoptosis. In subsequent studies in which we extended the duration of cortisol infusion (1mg/kg/d) to term, we found a dramatic incidence of stillbirth in the pregnancies with chronically increased cortisol and associated maternal hyperglycemia. To investigate the effects on the heart, transcriptomic analyses were performed on the septa using ovine microarrays and Webgestalt and Cytoscape programs for pathway inference. Analyses of the effects of 10 days of maternal cortisol infusion (130d-cortisol vs 130d control), ~25 days (term at ~140d-cortisol vs 140d control), normal maturation (140d-control vs 130d control) were performed. In all analyses gene ontology (GO) terms related to immune function and cytokine actions were significantly over-represented. After 10 days of cortisol, growth factor and muscle cell apoptosis pathways were significantly over-represented, consistent with our previous findings. We found significantly differentially regulated genes in the term fetuses (ie after ~25 days of cortisol) in pathways consistent with altered metabolism in the heart, particularly in mitochondria, associated with responses to hypoxia and to nutrient. Analysis of mitochondrial number by quantitative real-time PCR confirmed a significant decrease. These pathways were different from those modeled following the normal increase in cortisol in late gestation which contributes to normal maturation of the heart, and thus may be indicative of the fetal heart pathophysiologies seen in pregnancies complicated by diabetes, CushingM-bM-^@M-^Ys disease and chronic stress. 2 cohorts of singleton sheep fetuses at 129-131d gestation or 139-144d gestation (approximately term) were used. The first cohort received maternal cortisol infusion of 1mg/kg/day or vehicle for 10 days until approximately day 130 of gestation (n=6/group), the second cohort received the same dose of cortisol for approximately 25 days until near term (n=7, cortisol; n=7ewes, n=8 fetuses due to one set of twins, control)

ORGANISM(S): Ovis aries

SUBMITTER: Maureen Keller-Wood

PROVIDER: E-GEOD-54237 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Mechanisms for the adverse effects of late gestational increases in maternal cortisol on the heart revealed by transcriptomic analyses of the fetal septum.

Richards Elaine M EM Wood Charles E CE Rabaglino Maria Belen MB Antolic Andrew A Keller-Wood Maureen M

Physiological genomics 20140527 15

We have previously shown in sheep that 10 days of modest chronic increase in maternal cortisol resulting from maternal infusion of cortisol (1 mg/kg/day) caused fetal heart enlargement and Purkinje cell apoptosis. In subsequent studies we extended the cortisol infusion to term, finding a dramatic incidence of stillbirth in the pregnancies with chronically increased cortisol. To investigate effects of maternal cortisol on the heart, we performed transcriptomic analyses on the septa using ovine mi ...[more]

PMID: 24867915

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Project description:Compairsion of transcriptional profiles of heart and skeletal muscle tissue of fetal rhesus monkey exposed to maternal Bisphenol A or vehicle during early or late gestaion. Maternal exposure to the endocrine disrupting chemical, bisphenol A (BPA) affects the development of multiple organ systems in rodents and monkeys. However, effects of BPA exposure on cardiac and skeletal muscle development have not been assessed. Given that maternal BPA crosses placenta and reaches developing fetus, examining the physiological consequences of gestational exposure during development is of research significance. Therefore, we evaluate the effects of daily, oral BPA exposure of pregnant rhesus monkeys (Macaca mulatta) on the fetal heart and skeletal muscle transcriptome. Pregnant monkeys were administered daily oral doses (400 M-BM-5g/kg body weight) of BPA during early (50 M-bM-^@M-^S100 M-BM-1 2 days post conception, dpc) or late (100 M-BM-1 2 dpc - term), gestation. At the end of treatment, fetal heart tissues; left ventricle (LV), right ventricle (RV), left atrium (LA), right atrium (RA) and skeletal muscle; biceps femoris (BFM), were collected. Transcriptome expression was assessed using genome-wide microarray in each of the tissues and compared paired-wise between the BPA and matched control fetuses. Our results show that maternal BPA exposure alters transcriptional profile of several coding and non-coding genes in fetal heart and skeletal muscle. Pregnant rhesus monkey were administered a daily oral dose of 400 M-NM-<g/kg. body weight of Bisphenol A (BPA) or vehicle (CON) either during early (50M-bM-^@M-^S100 M-BM-1 2 days) or late (100 M-BM-1 2 daysM-bM-^@M-^Sterm) gestation. Gene expression profiles of each of the heart chambers (left ventricle, LV; right ventricle, RV; left atrium, LA; and right atrium, RA) and skeletal muscle (biceps femoris, BFM) were analyzed using microarrays and compared between the BPA exposed and matched control fetuses. A total of 12 samples were analyzed for each tissue; LV, RV, LA, RA and BFM. This includes 6 samples at each time period (early vs. late gestation) and 3 biological replicates for each treatment (BPA, n=3; control, n=3).

Dataset Information

Effect of 10 or 25 days cortisol treatment on late gestation fetal septum

Publications

Mechanisms for the adverse effects of late gestational increases in maternal cortisol on the heart revealed by transcriptomic analyses of the fetal septum.

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