LXR activation by GW3965 alters fat tissue distribution and adipose tissue infl ammation in ob/ob female mice

Amena Archer, Émilie Stolarczyk, Maria Luisa Doria, Luisa Helguero, Rosário Domingues, Jane K. Howard, Agneta Mode, Marion Korach-André, Jan Ake Gustafsson

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

To investigate the role of liver X receptor (LXR) in adipose tissue metabolism during obesity, ob/ob mice were treated for 5 weeks with the synthetic LXR agonist GW3965. MRI analysis revealed that pharmacological activation of LXR modified fat distribution by decreasing visceral (VS) fat and inversely increasing subcutaneous (SC) fat storage without affecting whole body fat content. This was concordant with opposite regulation by GW3965 of the lipolytic markers hormone-sensitive lipase (HSL) and adipose triglyceride lipase (ATGL) in the two fat depots; moreover, the expression of genes involved in lipogenesis was significantly induced in SC fat. Lipidomic analysis suggested that changes in lipid composition in response to GW3965 also varied between VS and SC fat. In both depots, the observed alteration in lipid composition indicated an overall change toward less lipotoxic lipids. Flow cytometry analysis showed decreased immune cell infiltration in adipose tissue of ob/ob mice in response to GW3965 treatment, which in VS fat mainly affected the macrophage population and in SC fat the lymphocyte population. In line with this, the expression and secretion of proinfl ammatory markers was decreased in both fat deposits with GW3965 treatment.

Original languageEnglish (US)
Pages (from-to)1300-1311
Number of pages12
JournalJournal of lipid research
Volume54
Issue number5
DOIs
StatePublished - May 2013

Keywords

  • Immune cell infiltration
  • Lipidomic analysis
  • Liver X receptor

ASJC Scopus subject areas

  • Biochemistry
  • Cell Biology
  • Endocrinology

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