Project description:The goal is to compare the DNA methylation patterns between ARH and PVH to examine to what extent DNA methylation is region specific in genome scale. ARH and PVH were micro-dissected from mice brains. Each 7 pieces of ARH or PVH were pooled and used for DNA methylation comparison by methylation specific amplification microarray (MSAM). As a brief description of the MSAM: 500ng of genomic DNA was serially digested with SmaI and XmaI followed by an adaptor ligation and adaptor mediated PCR amplification and then cohybridization. Two-color cohybridizations were performed as paired comparison of PVH vs. ARH with two biological replicates including dye swap.

2013-10-01 | E-GEOD-48197 | biostudies-arrayexpress

Different DNA methylation between hypothalamus paraventricular (PVH) and ventromedial (VMH) nuclei

Project description:The goal is to compare the DNA methylation patterns between ARH and PVH to examine to what extent DNA methylation is region specific in genome scale.

2013-10-01 | GSE48197 | GEO

Transcription profiling of paraventricular hypothalamic nucleus (PVH) from mice stimulated by either LPS injection or restraint to understand the molecular mechanisms in the modulation of PVH responses to categorically distinct stressors.

Project description:The paraventricular hypothalamic nucleus (PVH) is a key site for integrating neuroendocrine, autonomic, and behavioral adjustments to diverse homeostatic challenges, including physiological (e.g., infection or hemorrhage) and emotional [e.g., restraint (RST) or footshock] stresses. Both types of challenges ultimately converge to activate common response systems represented in PVH, including the hypothalamo-pituitary-adrenal axis and the sympathoadrenal system. Oligonucleotide microarrays (U74A; Affymetrix, Santa Clara, CA) were used to compare and contrast gene expression profiles in the PVH elicited at 1 and 3 hr after acute exposure to representative physiological [intraperitoneal injection of 10 microg lipopolysaccharide (LPS)] and emotional (30 min RST) stressors. In general, the two challenges recruited relatively few genes in common, with the degree of overlap varying across functional classes of genes. The greatest degree of commonality was seen among signaling molecules and neuropeptides, whereas transcription factors upregulated by RST and LPS were largely distinct. Unexpectedly, RST induced a number of immune-related molecules, which were not regulated by LPS. Hybridization histochemical analyses localized a subset of responsive transcripts to the PVH and/or immediately adjoining regions. Immunerelated molecules in particular distributed broadly to vascular and other barrier-associated cell types. These global transcriptional profiles inform the search for early (transcription factors) and late (target genes) mechanisms in the modulation of PVH, and generalized CNS, responses to categorically distinct stressors.

2007-11-01 | E-GEOD-367 | biostudies-arrayexpress

Acclimation Effects on Acute Thermal Stress in the goby, Gillichthys mirabilis

Project description:The goal of this study was to identify transcriptional resonses to acute heat stress following differential acclimation in the highly eurythermal goby fish, Gillichthys mirabilis. G. mirabilis were acclimated to 3 temperatures (9C, 19C and 28C) for one month and then exposed to an acute heat ramp at 4C/hr and sampled during the timecourse. Gill tissues were dissected and immediately flash frozen in liquid nitrogen. Total RNA was extracted, reverse transcribed into cDNA, labeled with cy5 and hybridized against a common reference (cy3) on 2-color cDNA microarray developed for this species. Significant genes were determined by expression differences between groups (one-way ANOVA, FDR<0.05) .

2010-09-15 | GSE22462 | GEO

Steady State Thermal Acclimation in the Eurythermal Goby fish, Gillichthys mirabilis

Project description:The goal of this study was to identify transcriptional resonses to thermal acclimation in a highly eurythermal fish. Specifically, what are the genes necessary to maintain homostasis at different temperatures and do these genes underlie any known acclimatory responses? Gillichthys mirabilis (goby fish) were acclimated to 3 temperatures (9C, 19C and 28C) for one month. Gill tissue from 7-9 individuals were dissected and immediately flash frozen in liquid nitrogen. Total RNA was extracted, reverse transcribed into cDNA, labeled with cy5 and hybridized against a common reference (cy3) on 2-color cDNA microarray developed for this species. Significant genes were determined by expression differences between groups (one-way ANOVA, FDR<0.05) .

2010-07-15 | GSE20849 | GEO

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