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Transcriptomic Analysis Reveals that Atf3/c-Jun/Lgals3 axis is associated with Central Diabetes Insipidus after Hypothalamic Injury

ABSTRACT: Purpose: To investigate the underlying regulatory mechanism of neurodegeneration induced by hypothalamic injury from basic gene expression profile, we extracted RNA from hypothalamic supraoptic nucleus (SON) and paraventricular nucleus (PVN) RNA sequencing (RNA-seq), at day 1 and day 7 after PEL surgery. Results: We identified 1711 differentially expressed genes (DEGs, defined as adjust p value < 0.05) between PEL_1d (day 1 after PEL) and control group, 185 DEGs between PEL_7d (day 7 after PEL) and control group, respectively. Conclusions: We revealed that RNA-seq based transcriptome characterization would expedite genetic network analyses of hypothalamic SON, PVN and permit the dissection of complex biologic functions during the process of central diabetes insipidus after PEL surgery.

ORGANISM(S): Rattus norvegicus

PROVIDER: GSE167904 | GEO | 2024/01/01

REPOSITORIES: GEO

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Adult Neurogenesis of the Median Eminence Contributes to Structural Reconstruction and Recovery of Body Fluid Metabolism in Hypothalamic Self-Repair

Project description:Purpose: To investigate the underlying regulatory mechanism of neurobiology induced by hypothalamic injury from basic gene expression profile, we extracted RNA from hypothalamic median eminence (ME) RNA sequencing (RNA-seq), at day 1 after control and PEL surgery. Results: We identified 811 differentially expressed genes (DEGs, defined as adjust p value < 0.05) between PEL_1d (day 1 after PEL) and control group. Conclusions:We revealed that RNA-seq based transcriptome characterization would expedite genetic network analyses of hypothalamic ME and permit the dissection of complex biologic functions during the process of central diabetes insipidus after PEL surgery.

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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.

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