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Cell Rep. 2015 Dec 1;13(9):2000-13. doi: 10.1016/j.celrep.2015.10.069. Epub 2015 Nov 25.

RNA-Seq and Mass-Spectrometry-Based Lipidomics Reveal Extensive Changes of Glycerolipid Pathways in Brown Adipose Tissue in Response to Cold.

Author information

1
Department of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense M, Denmark.
2
Zora Biosciences Oy, Biologinkuja 1, 02150 Espoo, Finland.
3
Department of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense M, Denmark; Novo Nordisk Foundation Center of Basic Metabolic Research, University of Copenhagen, 2200 Copenhagen, Denmark.
4
Department of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense M, Denmark. Electronic address: s.mandrup@bmb.sdu.dk.

Abstract

Cold exposure greatly alters brown adipose tissue (BAT) gene expression and metabolism to increase thermogenic capacity. Here, we used RNA sequencing and mass-spectrometry-based lipidomics to provide a comprehensive resource describing the molecular signature of cold adaptation at the level of the transcriptome and lipidome. We show that short-term (3-day) cold exposure leads to a robust increase in expression of several brown adipocyte genes related to thermogenesis as well as the gene encoding the hormone irisin. However, pathway analysis shows that the most significantly induced genes are those involved in glycerophospholipid synthesis and fatty acid elongation. This is accompanied by significant changes in the acyl chain composition of triacylglycerols (TAGs) as well as subspecies-selective changes of acyl chains in glycerophospholipids. These results indicate that cold adaptation of BAT is associated with significant and highly species-selective remodeling of both TAGs and glycerophospholipids.

PMID:
26628366
DOI:
10.1016/j.celrep.2015.10.069
[Indexed for MEDLINE]
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