Project description:We compared gene expression between high fat diet (HFD)-fed Adipo-NDUFS4 knockout (KO) and WT mice in inguinal white adipose tissue (iWAT or scWAT).
Project description:Differentiation of brown adipocytes is a crucial process for adaptive thermogenesis, which is stimulated by various factors. We found robust browning of inguinal white adipose tissue in UCP1/ApoE-DKO mice, but not in ApoE-KO mice, under high-fat diet condition. We used microarray to determine the genes specifically regulated in the browning white adipose tissue in UCP1/ApoE-DKO mice.
Project description:Using high throughput sequencing we report 5hmC levels, and gene expression changes in mouse Inguinal white adipose tissue upon exposure to room temperature and 7 days to cold in Tet1 floxed wild-type control and adipose selectiveTet1 KO mice.
Project description:We analyzed transcript abundance in interscapular brown and inguinal white adipose tissue of wildtype and UCP1-KO mice either adpated to 20°C or 30°C and fed a high fat or control diet.
Project description:Cold stimulation not only activates the thermogenesis activity of brown adipose tissue (BAT) but also induces browning of white adipose tissue (WAT). To elucidate the mechanisms underlying cold-induced thermogenesis and adipose tissue remodeling, we used RNA sequencing (RNA-seq) and liquid chromatography-tandem mass spectrometry (LC-MS/MS) to examine the transcriptomic and proteomic profiles, respectively, of adipose tissue from mice exposed to cold or thermoneutral temperature. The male C57BL/6J mice were divided into three groups (5 mice/group), two groups were kept at 6 ˚C for 6 h and 24 h, respectively, and the control group were kept at 22 ˚C for 24 h. Subsequently, the BAT and inguinal WAT of each mouse were dissected and subjected to RNA-seq and data-independent acquisition (DIA)-based LC-MS/MS.
Project description:Abstract
Brown and brite adipocytes are the key cells performing uncoupling protein 1 (UCP1) dependent non-shivering thermogenesis (NST) induced by cold exposure. Several lipid species are associated to NST in brown and white adipose tissue. Studies investigating the association of the lipid profile with NST rely on the analysis of whole organ homogenates or on the differentiation of pre-adipocytes in vitro. These approaches have so far not addressed the heterogeneity of white adipose tissue. Aim of this study was to characterize the lipid composition of white adipose tissue on a region-specific level in an in vivo context.
We applied MALDI mass spectrometry imaging (MALDI-MSI) in combination with immunohistochemistry and high-resolution mass spectrometry on sections of inguinal white adipose tissue of 129S6/SvEvTac and C57BL6/N-UCP1 knockout and wildtype mice acclimatized to cold to identify lipids specific to areas of UCP1 expression.
Based on the analysis of cold exposed 129S6/SvEvTac mice we identified cardiolipins (CL) and diacylglycerols (DG) species to be specific for areas expressing UCP1 and triacylglycerols (TG) to be the main lipid class characteristic for UCP1 negative regions within inguinal white adipose tissue. Investigation of C57BL6/N-UCP1 knockout and wildtype mice housed at either room temperature or acclimatized to cold, demonstrated that CL content in white adipose tissue is increased upon cold stimulation, independent of UCP1.
We introduce a MALDI-MSI based approach to identify lipids associated to thermogenic adipocytes in adipose tissues demonstrating a clear regional cold dependent upregulation of CL independent of UCP1.
