Nature of fatty acids in high fat diets differentially delineates obesity-linked metabolic syndrome components in male and female C57BL/6J mice

Diabetology & Metabolic Syndrome

Jean-François Tanguay²  Isabelle Cloutier¹  Vikie Lamontagne²  Souhad El Akoum² 

[1] Montreal Heart Institute, 5000 Belanger, Montréal (QC) H1T 1C8, Canada;Département de Sciences Biomédicales, Faculté de Médecine, Université de Montréal, 2900 boulevard Edouard-Montpetit, Montréal (QC) H3T 1J4, Canada

关键词: Type 2 Diabetes;    Obesity;    Metabolic disorders;    High Fat Diet;    Diabetes;    Adipokines;    Adipocyte;   

Others  :  817502
DOI  :  10.1186/1758-5996-3-34

 received in 2011-07-08, accepted in 2011-12-14,  发布年份 2011

【 摘 要 】

Background

Adverse effects of high-fat diets (HFD) on metabolic homeostasis are linked to adipose tissue dysfunction. The goal of this study was to examine the effect of the HFD nature on adipose tissue activity, metabolic disturbances and glucose homeostasis alterations in male mice compared with female mice.

Methods

C57BL/6J mice were fed either a chow diet or HFD including vegetal (VD) or animal (AD) fat. Body weight, plasmatic parameters and adipose tissue mRNA expression levels of key genes were evaluated after 20 weeks of HFD feeding.

Results

HFD-fed mice were significantly heavier than control at the end of the protocol. Greater abdominal visceral fat accumulation was observed in mice fed with AD compared to those fed a chow diet or VD. Correlated with weight gain, leptin levels in systemic circulation were increased in HFD-fed mice in both sexes with a significant higher level in AD group compared to VD group. Circulating adiponectin levels as well as adipose tissue mRNA expression levels were significantly decreased in HFD-fed male mice. Although its plasma levels remained unchanged in females, adiponectin mRNA levels were significantly reduced in adipose tissue of both HFD-fed groups with a more marked decrease in AD group compared to VD group. Only HFD-fed male mice were diabetic with increased fasting glycaemia. On the other hand, insulin levels were only increased in AD-fed group in both sexes associated with increased resistin levels. VD did not induce any apparent metabolic alteration in females despite the increased weight gain. Peroxisome Proliferator-Activated Receptors gamma-2 (PPARγ2) and estrogen receptor alpha (ERα) mRNA expression levels in adipose tissue were decreased up to 70% in HFD-fed mice but were more markedly reduced in male mice as compared with female mice.

Conclusions

The nature of dietary fat determines the extent of metabolic alterations reflected in adipocytes through modifications in the pattern of adipokines secretion and modulation of key genes mRNA expression. Compared with males, female mice demonstrate higher capacity in controlling glucose homeostasis in response to 20 weeks HFD feeding. Our data suggest gender specific interactions between the diet's fatty acid source, the adipocyte-secreted proteins and metabolic disorders.

【 授权许可】

   
2011 El Akoum et al; licensee BioMed Central Ltd.

【 图 表 】

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