Acute Inflammation Is a Predisposing Factor for Weight Gain and Insulin Resistance

被引:6
|
作者
de Oliveira, Edson Mendes [1 ]
Silva, Jacqueline C. [1 ]
Ascar, Thais P. [1 ]
Sandri, Silvana [1 ]
Marchi, Alexandre F. [1 ]
Migliorini, Silene [1 ]
Nakaya, Helder T., I [1 ,2 ]
Fock, Ricardo A. [1 ]
Campa, Ana [1 ]
机构
[1] Univ Sao Paulo, Fac Ciencias Farmaceut, Dept Anal Clin & Toxicol, Av Prof Lineu Prestes 580, BR-05508000 Sao Paulo, Brazil
[2] Hosp Israelita Albert Einstein, Av Albert Einstein 627, BR-05652900 Sao Paulo, Brazil
基金
巴西圣保罗研究基金会;
关键词
infection; adipocyte; SAA; TLR-4; TLR-2; CD14; SERUM-AMYLOID-A; HIGH-FAT DIET; HUMAN ADENOVIRUS-36; NLRP3; INFLAMMASOME; RECEPTOR; ENDOTOXEMIA; DISEASE; PROTEIN; OBESITY; TOLL-LIKE-RECEPTOR-4;
D O I
10.3390/pharmaceutics14030623
中图分类号
R9 [药学];
学科分类号
1007 ;
摘要
In the course of infection and intense endotoxemia processes, induction of a catabolic state leading to weight loss is observed in mice and humans. However, the late effects of acute inflammation on energy homeostasis, regulation of body weight and glucose metabolism are yet to be elucidated. Here, we addressed whether serial intense endotoxemia, characterized by an acute phase response and weight loss, could be an aggravating or predisposing factor to weight gain and associated metabolic complications. Male Swiss Webster mice were submitted to 8 consecutive doses of lipopolysaccharide (10 mg/kg LPS), followed by 10 weeks on a high-fat diet (HFD). LPS-treated mice did not show changes in weight when fed standard chow. However, when challenged by a high-fat diet, LPS-treated mice showed greater weight gain, with larger fat depot areas, increased serum leptin and insulin levels and impaired insulin sensitivity when compared to mice on HFD only. Acute endotoxemia caused a long-lasting increase in mRNA expression of inflammatory markers such as TLR-4, CD14 and serum amyloid A (SAA) in the adipose tissue, which may represent the key factors connecting inflammation to increased susceptibility to weight gain and impaired glucose homeostasis. In an independent experimental model, and using publicly available microarray data from adipose tissue from mice infected with Gram-negative bacteria, we performed gene set enrichment analysis and confirmed upregulation of a set of genes responsible for cell proliferation and inflammation, including TLR-4 and SAA. Together, we showed that conditions leading to intense and recurring endotoxemia, such as common childhood bacterial infections, may resound for a long time and aggravate the effects of a western diet. If confirmed in humans, infections should be considered an additional factor contributing to obesity and type 2 diabetes epidemics.
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页数:13
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