Ageing restructures the basal transcriptome of the core hypothalamic osmoregulatory control centre and alters the response to dehydration
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ABSTRACT:
ORGANISM(S): Rattus norvegicus
PROVIDER: GSE214353 | GEO | 2023/05/19
REPOSITORIES: GEO
Similar Datasets
Project description:The magnocellular neurons (MCNs) of the supraoptic nucleus (SON) and paraventricular nucleus (PVN) of the hypothalamus are the principal site of biosynthesis of prepropeptide precursor of the antidiuretic hormone vasopressin (VP). This precursor is processed during anterograde axonal transportation to terminals in the posterior pituitary gland, where biologically active VP is stored until released into the general circulation in response to physiological activation of the SON by osmotic cues. By binding to V2-type receptors located in the kidney, VP decreases the amount of water lost in urine. Osmotic activation of the SON is accompanied by a dramatic morphological and functional remodelling. We have sought to understand the mechanistic basis of this plasticity in terms of the differential expression of genes. To identify such genes, we adopted an unbiased global approach based on Suppressive Subtractive Hybridisation-Polymerase Chain Reaction (SSH-PCR) Using this method, we generated libraries of clones putatively differentially expressed in control vs dehydrated SON. In order to rapidly screen these libraries, 1152 clones were subjected to microarray analysis, resulting in the identification of 459 differentially expressed transcripts. cDNA clones corresponding 56 of these RNAs were sequenced, revealing many of them to be novel ESTs. Four transcripts were shown by in situ hybridisation (ISH) to be significantly up- or down-regulated in the SON following dehydration. These genes may represent novel effectors or mediators of SON physiological remodelling. 3 chips were hybridised with control SON and compared to 3 chips hybridised with dehydrated SON
2010-06-30 | E-GEOD-3133 | biostudies-arrayexpress
Project description:The hypothalamo-neurohypophyseal system (HNS) is crucial for osmoregulation. The HNS consists of the magnocellular neurons (MCNs) of the hypothalamus that have their axons terminating in the posterior pituitary. The HNS exerts its role in water balance via the release of the anti-diuretic hormone vasopressin (VP). Following dehydration VP is released into the general circulation. By binding to V2-type receptors located in the kidney, VP decrease the amount of water lost in urine. An osmotic stimulus also elicits an increase in VP gene expression and a functional remodelling of the entire HNS. We want to understand this plasticity in terms of the co-ordinated reprogramming of gene expression. We thus used Affymetrix U34a rat GeneChips to examine the dynamics of gene expression plasticity over the duration of a dehydration stimulus. Arrays were probed in triplicate with targets derived from SON of control rats, and rats dehydrated for 1 and for 3 days. Transcripts were thus identified that respond early to dehydration (up- or down-regulated after only 1day of dehydration), or that respond late (up- or down-regulated at 3 days of dehydration). Keywords: SON, Dehydration, clone
2006-08-15 | GSE3131 | GEO
Project description:The magnocellular neurons (MCNs) of the supraoptic nucleus (SON) and paraventricular nucleus (PVN) of the hypothalamus are the principal site of biosynthesis of prepropeptide precursor of the antidiuretic hormone vasopressin (VP). This precursor is processed during anterograde axonal transportation to terminals in the posterior pituitary gland, where biologically active VP is stored until released into the general circulation in response to physiological activation of the SON by osmotic cues. By binding to V2-type receptors located in the kidney, VP decreases the amount of water lost in urine. Osmotic activation of the SON is accompanied by a dramatic morphological and functional remodelling. We have sought to understand the mechanistic basis of this plasticity in terms of the differential expression of genes. To identify such genes, we adopted an unbiased global approach based on Suppressive Subtractive Hybridisation-Polymerase Chain Reaction (SSH-PCR) Using this method, we generated libraries of clones putatively differentially expressed in control vs dehydrated SON. In order to rapidly screen these libraries, 1152 clones were subjected to microarray analysis, resulting in the identification of 459 differentially expressed transcripts. cDNA clones corresponding 56 of these RNAs were sequenced, revealing many of them to be novel ESTs. Four transcripts were shown by in situ hybridisation (ISH) to be significantly up- or down-regulated in the SON following dehydration. These genes may represent novel effectors or mediators of SON physiological remodelling. Keywords: dehydration, SON, NIA
2005-12-02 | GSE3133 | GEO
Project description:The hypothalamo-neurohypophyseal system (HNS) is crucial for osmoregulation. The HNS consists of the magnocellular neurons (MCNs) of the hypothalamus that have their axons terminating in the posterior pituitary. The HNS exerts its role in water balance via the release of the anti-diuretic hormone vasopressin (VP). Following dehydration VP is released into the general circulation. By binding to V2-type receptors located in the kidney, VP decrease the amount of water lost in urine. An osmotic stimulus also elicits an increase in VP gene expression and a functional remodelling of the entire HNS. We want to understand this plasticity in terms of the co-ordinated reprogramming of gene expression. We thus used Affymetrix U34a rat GeneChips to examine the dynamics of gene expression plasticity over the duration of a dehydration stimulus. Arrays were probed in triplicate with targets derived from SON of control rats, and rats dehydrated for 1 and for 3 days. Transcripts were thus identified that respond early to dehydration (up- or down-regulated after only 1day of dehydration), or that respond late (up- or down-regulated at 3 days of dehydration). Experiment Overall Design: 3 chips hybridised with control SON were compared to 3 chips hybridised with 1 day dehydrated SON and 3 chips hybridised with 3 day dehydrated SON
2007-11-06 | E-GEOD-3131 | biostudies-arrayexpress
Project description:The supraoptic nucleus (SON) of the hypothalamus is an important integrative brain structure that co-ordinates responses to perturbations in water balance and regulates maternal physiology through the release of the neuropeptide hormones vasopressin and oxytocin into the circulation. Both dehydration and lactation evoke a dramatic morphological remodelling of the SON, a process known as function-related plasticity. We hypothesise that some of the changes seen in SON remodelling are mediated by differential gene expression, and have thus used microarrays to document global changes in transcript abundance that accompany chronic dehydration in female rats, and in lactation. In situ hydridisation analysis has confirmed the differential expression of 3 of these genes, namely Tumour necrosis factor induced protein 6, Gonadotrophin inducible transcription factor 1 and Ornithine decarboxylase antizyme inhibitor 1. Comparison of differential gene expression patterns in male and female rats subjected to dehydration and in lactating rats has enabled the identification of common elements that are significantly enriched in gene classes with particular functions. Two of these are related to the requirement for increased protein synthesis and hormone delivery in the physiologically stimulated SON (translation initiation factor activity and endoplasmic reticulum-Golgi intermediate compartment respectively), whilst others are consistent with concept of SON morphological plasticity (collagen fibril organisation, extracellular matrix organization and biogenesis, extracellular structure organization and biogenesis and homophilic cell adhesion). We suggest that the genes co-ordinately regulated in the SON as a consequence of dehydration and lactation form a network that mediates the plastic processes operational in the physiologically activated SON. Each independent microarray sample represented the SON from either 5 female euhydrated, 5 dehydrated (water restriction for 72hours with food ad libitum) or 11 days lactating. In total, 5 microarrays were performed for the Dehydrated and the Lactation groups and 4 for the euhydrated controls. Samples within each group may be considered to be both biological and technical replicates. The GeneSpring-derived MAS5 data described in the publication is not included in this submission.
2011-12-29 | E-GEOD-30733 | biostudies-arrayexpress
Project description:To explore the role of the light-sensitive protein OPSIN3 in the supraoptic nucleus (SON) of the hypothalamus, we knocked down the gene encoding this protein (Opn3) in one SON of sprague dawley rats by delivering a Opn3 short hairpin RNA (shRNA). A non-targeting ShRNA was delivered to the opppsite SON in the same rat as a contros.We then performed gene expression profiling analysis using data obtained from RNA-seq of 5 different rats at one time point.
2022-10-25 | GSE209557 | 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-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. 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-3110 | 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. 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:Older subjects are more prone to develop systemic dehydration. Systemic dehydration has implications for vocal fold biology by affecting gene and protein expression. The interaction of hydration status and age has not been investigated in the context of vocal fold biology. We used comparative proteomics to analyze the vocal fold proteome of 6.5-month-old and over 3-year-old rabbits under water ad libitum or water volume restriction protocol.
Young and old rabbits (n= 22) were either euhydrated (water ad libitum) or dehydrated by water volume restriction. Dehydration was confirmed by body weight loss of -5.4% and -4.6% in young and old groups, respectively, and a 1.7-fold increase of kidney renin gene expression in the young rabbits. LC-MS/MS identified 2,286 proteins in the rabbit vocal folds of young and old rabbits combined. Of these, 177, 169, and 81 proteins were significantlyaffected by age, hydration status, or the interaction of both factors, respectively. Comparative proteomics revealed a higher number of proteins differentially regulated in the vocal folds of older dehydrated rabbits compared to older euhydrated, and when compared to younger rabbits, regardless of hydration status. These proteins are predominantly related to structural components of the extracellular matrix and muscle layer, suggesting a disturbance in the viscoelastic properties of aging vocal fold tissue, especially when subjected to systemic dehydration.
2022-06-17 | MSV000089683 | MassIVE