Temperature adaptation effects on BAT metabolism
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE96680 | GEO | 2017/11/10
SECONDARY ACCESSION(S): PRJNA379364
REPOSITORIES: GEO
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Project description:We are reporting here the effects of adaptation to different ambient temperatures in the whole genome gene expression of interscapular BAT of BAT specific Akt2 knockout mice
2017-11-10 | GSE96679 | GEO
Project description:Ambient temperature affects energy intake and expenditure to maintain homeostasis in a continuously fluctuating environment. Here, mice with an adipose-specific defect in fatty acid oxidation (Cpt2A-/-) were subjected to varying temperature to determine the role of adipose bioenergetics to environmental adaptation. Cpt2A-/- brown adipose tissue (BAT) failed to induce thermogenic genes such as Ucp1 and Pgc1α in response to adrenergic stimulation, which is exacerbated by increasing temperature. Thermoneutrality induced a mitochondrial DNA stress in Cpt2A-/- BAT that resulted in a loss of classical interscapular BAT, but did not affect body weight gain or glucose tolerance in response to a high-fat diet. In this dataset, we include the expression data obtained from dissected mouse interscapular brown adipose tissue from mice acclimatized to thermoneutrality (30C) with and without beta3adrenergic stimulation with and without the deletion of carnitine palmitoyltransferase 2 (i.e., adipose unable to beta-oxidize long chain fatty acids in mitochondria). WildType and Cpt2A KnockOut mice were treated either with or without beta3adrenergic stimulation, thus four classes. Three biologic replicates were compared per class, thus twelve mice.
2016-02-04 | E-GEOD-72210 | biostudies-arrayexpress
Project description:Ambient temperature affects energy intake and expenditure to maintain homeostasis in a continuously fluctuating environment. Here, mice with an adipose-specific defect in fatty acid oxidation (Cpt2A-/-) were subjected to varying temperature to determine the role of adipose bioenergetics to environmental adaptation. Cpt2A-/- brown adipose tissue (BAT) failed to induce thermogenic genes such as Ucp1 and Pgc1α in response to adrenergic stimulation, which is exacerbated by increasing temperature. Thermoneutrality induced a mitochondrial DNA stress in Cpt2A-/- BAT that resulted in a loss of classical interscapular BAT, but did not affect body weight gain or glucose tolerance in response to a high-fat diet. In this dataset, we include the expression data obtained from dissected mouse interscapular brown adipose tissue from mice acclimatized to thermoneutrality (30C) with and without beta3adrenergic stimulation with and without the deletion of carnitine palmitoyltransferase 2 (i.e., adipose unable to beta-oxidize long chain fatty acids in mitochondria).
2016-02-04 | GSE72210 | GEO
Project description:The interscapular brown adipose tissue (BAT) depots of adult male and female C57BL/6J mice, housed at 22 °C, were analyzed to identify sex differences in the BAT transcriptome at basal housing conditions.
2021-06-16 | E-MTAB-8717 | biostudies-arrayexpress
Project description:In this study, we performed a global quantitative proteomic analysis under extreme temperatures, pH, hydrostatic pressure (HP) and salinity on an archaeal strain, Thermococcus eurythermalis A501. Here is the result of temperature adaptation: low temperature (65°C) and high temperature (95°C), and the optimal culture condition (85°C, pH 7, 2.3% NaCl, 0.1 MPa or 10 MPa) was used as the control.
2020-09-09 | PXD018991 | Pride
Project description:Background: Coevolution between pathogens and their hosts decreases host morbidity and mortality. Bats can tolerate viruses which can be lethal to other vertebrate orders, including humans. Bat adaptations to infection include localized immune response, early pathogen sensing, high interferon expression without pathogen stimulation, and regulated inflammatory response. The immune reaction is costly, and bats suppress high-cost metabolism during torpor. In the temperate zone, bats hibernate in winter, utilizing a specific behavioural adaptation to survive detrimental environmental conditions and lack of energy resources. Hibernation torpor involves major physiological changes that pose an additional challenge to bat-pathogen coexistence. Here, we compared bat cellular reaction to viral challenge under conditions simulating hibernation, evaluating the changes between torpor and euthermia. Results: We infected the olfactory nerve-derived cell culture of Myotis myotis with an endemic bat pathogen, European bat lyssavirus 1 (EBLV-1). After infection, the bat cells were cultivated at two different temperatures – 37 ◦ C and 5 ◦ C - to examine the cell response during conditions simulating euthermia and torpor, respectively. The mRNA isolated from the cells was sequenced and analysed for differential gene expression attributable to the temperature and/or infection treatment. In conditions simulating euthermia, infected bat cells produce an excess signalling by multitude of pathways involved in apoptosis and immune regulation influencing proliferation of regulatory cell types which can, in synergy with other produced cytokines, contribute to viral tolerance. We found no up- or downregulated genes expressed in infected cells cultivated at conditions simulating torpor compared to non-infected cells cultivated under the same conditions. When studying the reaction of uninfected cells to the temperature treatment, bat cells show an increased production of heat shock proteins (HSPs) with chaperone activity, improving the bat’s ability to repair molecular structures damaged due to the stress related to the temperature change. Conclusions: The lack of bat cell reaction to infection in conditions simulating hibernation may contribute to the virus tolerance or persistence in bats. Together with the cell damage repair mechanisms induced in response to hibernation, the immune regulation may promote bats’ ability to act as reservoirs of zoonotic viruses such as lyssaviruses.
2023-03-29 | GSE228404 | GEO
Project description:We performed transcriptomic profiling for two models of adipose browning, the classical mouse model and our newly described great roundleaf bat (H. armiger) model. Transcriptomes were generated from subcutaneous adipose tissue (sWAT), intra-abdominal adipose tissue (aWAT) and interscapular BAT (iBAT) from male and female bats, as well as sWAT and iBAT from male and female mice, which were acclimatized to 10°C and 30°C. These 20 trascriptomes allowed us to identity genes, GO terms, and pathways that show significant expression changes and are shared by both species during the browning process.
2018-07-12 | GSE72603 | GEO
Project description:Insufficient mitochondrial quantity in brown adipose tissue (BAT) causes defective thermogenesis and positive energy balance, which is coupled with the development of obesity. Whether disturbance of mitochondrial quality affects BAT function remains unknown. Here, we describe that the brown adipocyte-specific Leucine-rich PPR motif-containing protein knockout mice (LrpprcBKO) exhibited mitochondrial electron transport chain (ETC) proteome imbalance and a complete loss of the -adrenergic-stimulated thermogenesis at room temperature (RT), due to specific reduction of mtDNA-encoded genes. However, the LrpprcBKO mice were lean at normal chow and were protected against high-fat-diet-induced metabolic abnormalities, such as obesity, insulin resistance, adipose inflammation, hepatic steatosis, and hypertriglyceridemia. The beige adipocytes in inguinal white adipose tissue were expanded in LrpprcBKO mice at RT, but not at thermoneutrality. However, BAT thermogenic defects and metabolic benefits were present in LrpprcBKO mice regardless of ambient temperatures. Collectively, our results reveal that a thermogenesis-incapable BAT with mitochondrial ETC proteome imbalance can improve systemic metabolism, suggesting BAT’s contributions to thermoregulation and systemic metabolism can be uncoupled.
2021-10-07 | PXD008798 | Pride
Project description:Cells in ectothermic organisms often maintain homeostatic function over a considerable range of ambient temperatures. However, as temperature has pronounced effects on all biological processes, but not necessarily in a uniform manner on each of the myriad of distinct processes, cellular acclimation to ambient temperature change is predicted to involve complex regulation, including the transcriptional level. To study effects of changes in ambient temperature on chromatin accessibility, we performed ATAC-Seq with S2R+ cells, a line derived from embryos of the ectothermic organism Drosophila melanogaster. Aliquots of S2R+ cells were exposed to different temperatures (14, 25 and 29°C) within the readily tolerated range before analysis with ATAC-Seq.
2021-09-13 | GSE159221 | GEO
Project description:Background: Ocean temperatures are projected to increase over the coming century, with dramatic consequences for the marine biosphere. Diatoms are important contributors to marine primary production and the ocean carbon cycle, yet the molecular mechanisms that regulate their acclimation and adaptation to temperature are poorly understood. Method: Here we use a transcriptomic approach to identify the molecular mechanisms associated with temperature acclimation and adaptation in closely related colder- and warmer-adapted diatom species. Results: We find contrasting patterns of differential expression at sub- and supra-optimal temperatures across the two species, which may be due to adaptive changes in baseline expression. Frontloaded and divested pathways indicate protein processing machinery, membrane structure, and the balance between temperature-independent photosynthesis and temperature-dependent metabolism are key elements of adaptation to temperature changes. Conclusions: Our findings suggest that transcriptional frontloading and divestment may provide a framework to interpret diatom acclimation and adaptation to temperature and success under future warming.
2019-07-31 | GSE125205 | GEO