Peroxisome-derived lipids regulate adipose thermogenesis by mediating cold-induced mitochondrial fission

Hongsuk Park, Anyuan He, Min Tan, Jordan M. Johnson, John M. Dean, Terri A. Pietka, Yali Chen, Xiangyu Zhang, Fong Fu Hsu, Babak Razani, Katsuhiko Funai, Irfan J. Lodhi

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Peroxisomes perform essential functions in lipid metabolism, including fatty acid oxidation and plasmalogen synthesis. Here, we describe a role for peroxisomal lipid metabolism in mitochondrial dynamics in brown and beige adipocytes. Adipose tissue peroxisomal biogenesis was induced in response to cold exposure through activation of the thermogenic coregulator PRDM16. Adipose-specific knockout of the peroxisomal biogenesis factor Pex16 (Pex16-AKO) in mice impaired cold tolerance, decreased energy expenditure, and increased diet-induced obesity. Pex16 deficiency blocked cold-induced mitochondrial fission, decreased mitochondrial copy number, and caused mitochondrial dysfunction. Adipose-specific knockout of the peroxisomal β-oxidation enzyme acyl-CoA oxidase 1 (Acox1-AKO) was not sufficient to affect adiposity, thermogenesis, or mitochondrial copy number, but knockdown of the plasmalogen synthetic enzyme glyceronephosphate O-acyltransferase (GNPAT) recapitulated the effects of Pex16 inactivation on mitochondrial morphology and function. Plasmalogens are present in mitochondria and decreased with Pex16 inactivation. Dietary supplementation with plasmalogens increased mitochondrial copy number, improved mitochondrial function, and rescued thermogenesis in Pex16-AKO mice. These findings support a surprising interaction between peroxisomes and mitochondria regulating mitochondrial dynamics and thermogenesis.

Original languageEnglish
Pages (from-to)694-711
Number of pages18
JournalJournal of Clinical Investigation
Volume129
Issue number2
DOIs
StatePublished - Feb 1 2019

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