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2017 ; 16
(1
): 680-686
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Metformin ameliorates hepatic steatosis and improves the induction of autophagy
in HFD?induced obese mice
#MMPMID28560428
Li M
; Sharma A
; Yin C
; Tan X
; Xiao Y
Mol Med Rep
2017[Jul]; 16
(1
): 680-686
PMID28560428
show ga
The present study aimed to investigate the effect of metformin on the induction
of autophagy in the liver and adipose tissues of a mouse model of obesity.
C57BL/6J mice were fed a high?fat diet (HFD) for 12 weeks to induce
obesity?associated hepatic steatosis, and treated with metformin (150 mg/kg/d) by
intraperitoneal injection for the final 4 weeks of HFD feeding. Body weight was
recorded weekly, and the food intake of the mice was recorded daily during the
treatment period. Liver and adipose tissues were harvested for histological and
molecular analyses. The results revealed that metformin significantly reduced
body weight without altering food intake in the HFD mice, particularly in the
epididymal white adipose tissue (eWAT). Metformin treatment ameliorated
HFD?induced hepatic steatosis and serum levels of triglycerides, which was
consistent with a marked increase in the expression levels of
microtubule?associated protein 1 light chain 3 (LC3) and AMP?activated protein
kinase (AMPK) in the liver following metformin treatment. However, metformin
suppressed the expression of LC3 in the eWAT without altering the expression of
AMPK, compared with that in the HFD mice. In conclusion, metformin reduced the
body weight and hepatic steatosis of the HFD?induced obese mice, without altering
food intake. The effects of metformin treatment may be attributable to the
improved induction of hepatic autophagy and the inhibited induction of adipose
tissue autophagy.
|*Diet, High-Fat
[MESH]
|AMP-Activated Protein Kinases/genetics/metabolism
[MESH]