Viola mandshurica ethanolic extract prevents high-fat-diet-induced obesity in mice by activating AMP-activated protein kinase.

Abstract

Viola mandshurica W. Becker has been used as an expectorant, diuretic, and anti-inflammatory agent. We evaluated the effects of V. mandshurica ethanol extract (VME) on high-fat-diet (HFD)-induced obesity in mice. HPLC analysis showed that the VME contained 11.95 ± 0.37 mg/g esculetin and 0.13 ± 0.01 mg/g scopoletin. Orally administered VME decreased the body weight, adipose tissue mass, adipocyte size, and triglyceride and leptin serum concentrations. In contrast, VME increased serum adiponectin concentrations and adiponectin expression levels in epididymal adipose tissues. VME also significantly reversed the HFD-induced elevation of the mRNA and protein levels of lipogenic genes such as peroxisome proliferator-activated receptor γ, sterol regulatory element-binding protein-1c, fatty-acid synthase, and adipocyte protein 2. Moreover, VME reversed the HFD-induced inhibition of AMP-activated protein kinase (AMPK) and acetyl-coA carboxylase phosphorylation in epididymal adipose tissues. Furthermore, treatment of VME and esculetin in 3T3-L1 cells inhibited adipocyte differentiation and fat accumulation. These results suggest that VME exerts anti-obesity effects in HFD-induced obese mice by activating AMPK and suppressing PPARγ expression in adipose tissues.

• Authors: Yoon-Young Sung, Dong-Seon Kim, Ho Kyoung Kim
• Journal: Environmental toxicology and pharmacology (Environ Toxicol Pharmacol) Vol. 38 Issue 1 Pg. 41-50 (Jul 2014) ISSN: 1872-7077 [Electronic] Netherlands
• PMID: 24879516 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2014 Elsevier B.V. All rights reserved.

Chemical References

• Anti-Obesity Agents
• PPAR gamma
• Plant Extracts
• Solvents
• Triglycerides
• Ethanol
• Cholesterol
• Creatinine
• Aspartate Aminotransferases
• Alanine Transaminase
• AMP-Activated Protein Kinases

Topics

• 3T3-L1 Cells
• AMP-Activated Protein Kinases (metabolism)
• Adipocytes (cytology, drug effects)
• Adipose Tissue (drug effects, growth & development, metabolism)
• Alanine Transaminase (blood)
• Animals
• Anti-Obesity Agents (pharmacology, therapeutic use)
• Aspartate Aminotransferases (blood)
• Blood Urea Nitrogen
• Body Weight (drug effects)
• Cell Differentiation (drug effects)
• Cholesterol (blood)
• Creatinine (blood)
• Diet, High-Fat
• Ethanol
• Male
• Mice
• Mice, Inbred C57BL
• Obesity (blood, drug therapy, metabolism)
• PPAR gamma (antagonists & inhibitors, genetics, metabolism)
• Phytotherapy
• Plant Extracts (pharmacology, therapeutic use)
• Solvents (chemistry)
• Triglycerides (blood)
• Viola