Ethanol exposure reveals persistent and categorizable astrocyte calcium response types and associated gene signatures
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE199025 | GEO | 2022/07/27
REPOSITORIES: GEO
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2012-10-01 | E-GEOD-40580 | biostudies-arrayexpress
Project description:Microarray analysis was used to identify the calcium-responsive genes dependent on CrzA in the filamentous fungus Aspergillus nidulans. In order to identify such genes, we conducted the two types of experiment. One was a comparison between wild type with calcium treatment and wild type without calcium treatment. Another was a comparison between wild type with calcium treatment and crzA mutant with calcium treatment. From a comparison between the results of these experiments, we could identify the genes whose expression was induced or repressed in response to calcium in a manner dependent on CrzA. KEY WORD; Aspergillus nidulans, calcium response, crzA
2008-10-03 | GSE12953 | GEO
Project description:This model is from the article:
On the encoding and decoding of calcium signals in hepatocytes
Ann Zahle Larsen, Lars Folke Olsen and Ursula Kummera
Biophysical ChemistryVolume 107, Issue 1, 1 January 2004, Pages 83-99
14871603,
Abstract:
Many different agonists use calcium as a second messenger. Despite intensive research in intracellular calcium signalling it is an unsolved riddle how the different types of information represented by the different agonists, is encoded using the universal carrier calcium. It is also still not clear how the information encoded is decoded again into the intracellular specific information at the site of enzymes and genes. After the discovery of calcium oscillations, one likely mechanism is that information is encoded in the frequency, amplitude and waveform of the oscillations. This hypothesis has received some experimental support. However, the mechanism of decoding of oscillatory signals is still not known. Here, we study a mechanistic model of calcium oscillations, which is able to reproduce both spiking and bursting calcium oscillations. We use the model to study the decoding of calcium signals on the basis of co-operativity of calcium binding to various proteins. We show that this co-operativity offers a simple way to decode different calcium dynamics into different enzyme activities.
Note:
This model corresponds to the 5 variable receptor-operated model, as described by Larsen et al., 2004. This model is a modified version of the model described in Kummer 2000 (PMID:10968983)
2024-09-02 | BIOMD0000000330 | BioModels
Project description:Purpose: Traditional whole-tissue sequencing approaches do not fully capture brain cell-type specific effects of chronic alcohol. Therefore, the purpose of this study was to identify the specific transcriptome alterations in astrocytes due to chronic alcohol. Methods: We performed RNA-sequencing on astrocytes isolated from the prefrontal cortex (PFC) of C57BL/6J mice following chronic every-other-day alcohol consumption. Results: Differential expression analysis revealed alcohol-induced gene expression changes unique to astrocytes that could not be identified using whole tissue homogenate analysis. Enrichment analysis revealed involvement of calcium-related signaling and regulation of extracellular matrix genes in the astrocyte response to alcohol abuse. Conclusion: Our study presents the first focused analysis on the astrocyte transcriptome following chronic alcohol consumption, provides a framework for studying the functional response of astrocytes to alcohol and the possible astrocyte-specific effects of alcohol. In addition, our data represents a novel resource for groups interested in biological functions of astrocytes in the adult mouse PFC.
2018-01-10 | GSE92457 | GEO