Transcriptomic Profiling of the Hypothalamic PVN in a Rat Model of Hypertension
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ORGANISM(S): Rattus norvegicus
PROVIDER: GSE309435 | GEO | 2026/03/01
REPOSITORIES: GEO
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Project description:The hypothalamic paraventricular (PVN) and supraoptic (SON) nuclei are important integrative structures that regulate co-ordinated responses to perturbations in cardiovascular homeostasis. Through descending projections from parvocellular neurons to the brainstem, the PVN acts as an autonomic 'premotor nucleus', regulating reflex changes in sympathetic nerve activity that are involved in blood pressure and blood volume regulation. Endocrine responses are mediated through axonal projections from SON and PVN magnocellular neurons (MCNs) to the capillaries of the posterior pituitary neural lobe. In response to dehydration, a massive release of the antidiuretic peptide hormone vasopressin (VP) into the circulation is accompanied by a dramatic functional remodelling of the HNS. We have used microarrays to comprehensively catalogue the genes expressed in the PVN, the SON and the neurointermediate lobe (NIL) of the pituitary gland. Further, we have identified transcripts that are regulated as a consequence of dehydration, as well as RNAs that are enriched in either the PVN or the SON. We suggest that these differentially expressed genes represent candidate regulators and effectors of HNS activity and remodelling. Experiment Overall Design: In total, 10 Affymetrix Genechip Rat Genome 230 2.0 were used. The experiment compared hypothalamic supraoptic nucleus from 3 day dehydrated and control male Sprague Dawley rats (10-12 weeks). For each chip, tissue from 5 animals was pooled prior to extraction of total RNA and in total 5 chips were used for each condition using independently prepared RNA samples from separate groups of animals.
2008-06-12 | E-GEOD-3111 | biostudies-arrayexpress
Project description:The hypothalamic paraventricular (PVN) and supraoptic (SON) nuclei are important integrative structures that regulate co-ordinated responses to perturbations in cardiovascular homeostasis. Through descending projections from parvocellular neurons to the brainstem, the PVN acts as an autonomic 'premotor nucleus', regulating reflex changes in sympathetic nerve activity that are involved in blood pressure and blood volume regulation. Endocrine responses are mediated through axonal projections from SON and PVN magnocellular neurons (MCNs) to the capillaries of the posterior pituitary neural lobe. In response to dehydration, a massive release of the antidiuretic peptide hormone vasopressin (VP) into the circulation is accompanied by a dramatic functional remodelling of the HNS. We have used microarrays to comprehensively catalogue the genes expressed in the PVN, the SON and the neurointermediate lobe (NIL) of the pituitary gland. Further, we have identified transcripts that are regulated as a consequence of dehydration, as well as RNAs that are enriched in either the PVN or the SON. We suggest that these differentially expressed genes represent candidate regulators and effectors of HNS activity and remodelling. Keywords: DEHYDRATION, PVN
2005-12-01 | GSE3111 | GEO
Project description:To examine the transcriptional landscape of the paraventricular nucleus of the hypothalmus across 24-hrs day and night we carried out snRANseq on PVN tissue harvested at two antiphase timepoints, ZT8 and ZT20
2024-04-16 | GSE231734 | GEO
Project description:Transcriptomic Profiling of the Hypothalamic PVN in a Rat Model of Hypertension
| PRJNA1336079 | ENA
Project description:We have used microarrays to comprehensively describe the transcriptomes of the supraoptic nucleus (SON), the paraventricular nucleus (PVN) and the neurointermediate lobe (NIL) of adult male Sprague-Dawley (SD) and Wistar-Kyoto (WKY) rats, as well as the paraventricular nucleus of Wistar (WIST) rats. Comparison of these gene lists has enabled us to identify surprisingly large differences in hypothalamo-neurohypophyseal system gene expression patterns in these three strains. We have also shown that different transcript populations are enriched in the PVN and the SON of SD and WKY rats. The transcriptome differences catalogued here may be molecular substrates for the neuro-humoral phenotypic differences exhibited by different strains of rats. Experiment Overall Design: For each experimental group (SON-WKY, PVN-WKY, NIL-WKY, SON-SD, PVN-SD, NIL-SD, PVN-WISTAR) five chips were hybridised with independantly pooled RNA from a biological n=5.
2008-10-25 | E-GEOD-8491 | biostudies-arrayexpress
Project description:Malnutrition during pregnancy, which causes prenatal exposure to excessive glucocorticoid, induces adverse metabolic programming leading to hypertension in offspring. Pregnant rats receiving a low-protein diet exhibited moderate downregulation of 11-beta-dehydrogenase isozyme 2, which inactivates corticosterone, in the placenta, resulting in prenatal exposure to excessive corticosterone. In offspring of pregnant rats receiving a low-protein diet or dexamethasone, mRNA expression of angiotensin receptor type 1a (Agtr1a) in the paraventricular nucleus (PVN) of the hypothalamus was upregulated, concurrent with reduced expression of DNA methyltransferase 3a (Dnmt3a), reduced binding of DNMT3a to the Agtr1a promoter, and DNA demethylation, suggesting hypothalamic Agtr1a expression is epigenetically modulated by excess glucocorticoid. Dexamethasone treatment of PVN cells downregulated DNMT3a while upregulating Agtr1a, and decreased DNMT3a binding and DNA demethylation at the Agtr1a promoter. Consistent with Agtr1a upregulation in the hypothalamus, salt loading increased BP in both types of offspring. Even without dexamethasone treatment, hypothalamic neuron-specific DNMT3a-deficient mice, in which Agtr1a was upregulated, exhibited salt-induced BP elevation. By contrast, dexamethasone-treated Agtr1a-deficient mice failed to show salt-induced BP elevation, despite reduced expression of DNMT3a. Thus, epigenetic modulation of hypothalamic angiotensin signaling contributes to salt-sensitive hypertension induced by prenatal glucocorticoid excess in offspring of mothers that are malnourished during pregnancy.
2018-11-30 | GSE119235 | GEO
Project description:The hypothalamic paraventricular (PVN) and supraoptic (SON) nuclei are important integrative structures that regulate co-ordinated responses to perturbations in cardiovascular homeostasis. Through descending projections from parvocellular neurons to the brainstem, the PVN acts as an autonomic 'premotor nucleus', regulating reflex changes in sympathetic nerve activity that are involved in blood pressure and blood volume regulation. Endocrine responses are mediated through axonal projections from SON and PVN magnocellular neurons (MCNs) to the capillaries of the posterior pituitary neural lobe. In response to dehydration, a massive release of the antidiuretic peptide hormone vasopressin (VP) into the circulation is accompanied by a dramatic functional remodelling of the HNS. We have used microarrays to comprehensively catalogue the genes expressed in the PVN, the SON and the neurointermediate lobe (NIL) of the pituitary gland. Further, we have identified transcripts that are regulated as a consequence of dehydration, as well as RNAs that are enriched in either the PVN or the SON. We suggest that these differentially expressed genes represent candidate regulators and effectors of HNS activity and remodelling. Keywords: DEHYDRATED - NIL
2005-12-01 | GSE3125 | GEO
Project description:The hypothalamic paraventricular (PVN) and supraoptic (SON) nuclei are important integrative structures that regulate co-ordinated responses to perturbations in cardiovascular homeostasis. Through descending projections from parvocellular neurons to the brainstem, the PVN acts as an autonomic 'premotor nucleus', regulating reflex changes in sympathetic nerve activity that are involved in blood pressure and blood volume regulation. Endocrine responses are mediated through axonal projections from SON and PVN magnocellular neurons (MCNs) to the capillaries of the posterior pituitary neural lobe. In response to dehydration, a massive release of the antidiuretic peptide hormone vasopressin (VP) into the circulation is accompanied by a dramatic functional remodelling of the HNS. We have used microarrays to comprehensively catalogue the genes expressed in the PVN, the SON and the neurointermediate lobe (NIL) of the pituitary gland. Further, we have identified transcripts that are regulated as a consequence of dehydration, as well as RNAs that are enriched in either the PVN or the SON. We suggest that these differentially expressed genes represent candidate regulators and effectors of HNS activity and remodelling. Keywords: Dehydration
2005-12-01 | GSE3110 | GEO
Project description:The hypothalamic paraventricular (PVN) and supraoptic (SON) nuclei are important integrative structures that regulate co-ordinated responses to perturbations in cardiovascular homeostasis. Through descending projections from parvocellular neurons to the brainstem, the PVN acts as an autonomic 'premotor nucleus', regulating reflex changes in sympathetic nerve activity that are involved in blood pressure and blood volume regulation. Endocrine responses are mediated through axonal projections from SON and PVN magnocellular neurons (MCNs) to the capillaries of the posterior pituitary neural lobe. In response to dehydration, a massive release of the antidiuretic peptide hormone vasopressin (VP) into the circulation is accompanied by a dramatic functional remodelling of the HNS. We have used microarrays to comprehensively catalogue the genes expressed in the PVN, the SON and the neurointermediate lobe (NIL) of the pituitary gland. Further, we have identified transcripts that are regulated as a consequence of dehydration, as well as RNAs that are enriched in either the PVN or the SON. We suggest that these differentially expressed genes represent candidate regulators and effectors of HNS activity and remodelling. Experiment Overall Design: In total, 10 Affymetrix Genechip Rat Genome 230 2.0 were used. The experiment compared hypothalamic supraoptic nucleus from 3 day dehydrated and control male Sprague Dawley rats (10-12 weeks). For each chip, tissue from 5 animals was pooled prior to extraction of total RNA and in total 5 chips were used for each condition using independently prepared RNA samples from separate groups of animals.
2008-06-12 | E-GEOD-3125 | biostudies-arrayexpress
Project description:Rationale Electroconvulsive seizure (ECS) therapy is a nonchemical treatment for depression. Since ECS up-regulates expression of c-Fos in the paraventricular nucleus of hypothalamus (PVN), the function of which is frequently influenced in depression, we hypothesized that ECS modulates functions of the PVN and contributes to its antidepressant effects. Objectives To identify gene expression changes in the mouse PVN by ECS treatment Material and methods First, we established a method to amplify nucleotides from small quantities of RNA. Mice received one shock of ECS and their brains were collected at 2 or 6 h after shock. The PVN was microdissected from dehydrated brain sections, its total RNA was extracted and microarray analysis was applied. Results At 2 h after ECS, 2.6% (589 genes) of the probes showed more than 2-fold decrease, and 0.9% (205 genes) showed more than 2-fold increase. To confirm the expression changes, genes showing differential expression with a wide range in the microarray were analyzed by qPCR. Among the genes with more than 2-fold change by ECS, down-regulated 94 genes and up-regulated 24 genes have been reported the association with anxiety, bipolar disorder or mood disorder by the Ingenuity knowledge database. The groups of down-regulated genes, which are suggested to modulate the function of the PVN or associate to psychiatric disorders, include neuropeptides (Cck), kinases (Prkcb, Prkcc, Camk2a), transcription factors (Bcl6, Tbr1), transporters (Aqp4) and others (Fmr1). Conclusion The present results indicate that ECS treatment can modulate the functions of PVN via a series of gene expression changes, and may contribute to its antidepressant effects at least in part. Mice received one shock of ECS and their brains were collected at 2 h (PVN_ECS2h_1, PVN_ECS2h_2) or 6 h after shock (PVN_ECS6h_1, PVN_ECS6h_2). The brains of sham-treated animals were collected at 2 h after treatment (PVN_sham_1, PVN_sham_2). The PVN was microdissected from dehydrated brain sections, and its total RNA was extracted. RNA samples from two or three animals were pooled to minimize the impact of biological variance. After nucleotide amplification by the ovation amplification, the gene expression profiles were obtained by the Affymetrix microarray analysis. The microarray analysis was performed twice using different sets of animals.
2012-01-24 | E-GEOD-35259 | biostudies-arrayexpress