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

TY - JOUR

T1 - LXR activation by GW3965 alters fat tissue distribution and adipose tissue inflammation in ob/ob female mice

AU - Archer, Amena

AU - Stolarczyk, Emilie

AU - Doria, Maria Luisa

AU - Helguero, Luisa

AU - Domingues, Rosario

AU - Howard, Jane K

AU - Mode, Agneta

AU - Korach Andre, Marion

AU - Gustafsson, Jan-Ake

PY - 2013/2/27

Y1 - 2013/2/27

N2 - To investigate the role of 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 HSL and 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 towards 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 pro-inflammatory markers was decreased in both fat deposits with GW3965 treatment.

AB - To investigate the role of 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 HSL and 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 towards 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 pro-inflammatory markers was decreased in both fat deposits with GW3965 treatment.

U2 - 10.1194/jlr.M033977

DO - 10.1194/jlr.M033977

M3 - Article

C2 - 23446231

SN - 0022-2275

VL - 54

SP - 1300

EP - 1311

JO - Journal of Lipid Research

JF - Journal of Lipid Research

ER -