Carnosic acid as a major bioactive component in rosemary extract ameliorates high-fat-diet-induced obesity and metabolic syndrome in mice.

Abstract

In this study, we investigated the preventive effects of carnosic acid (CA) as a major bioactive component in rosemary extract (RE) on high-fat-diet-induced obesity and metabolic syndrome in mice. The mice were given a low-fat diet, a high-fat diet or a high-fat diet supplemented with either 0.14% or 0.28% (w/w) CA-enriched RE (containing 80% CA, RE#1L and RE#1H), or 0.5% (w/w) RE (containing 45% CA, RE#2), for a period of 16 weeks. There was the same CA content in the RE#1H and RE#2 diets and half of this amount in the RE#1L diet. The dietary RE supplementation significantly reduced body weight gain, percent of fat, plasma ALT, AST, glucose, insulin levels, liver weight, liver triglyceride, and free fatty acid levels in comparison with the mice fed with a HF diet without RE treatment. RE administration also decreased the levels of plasma and liver malondialdehyde, advanced glycation end products (AGEs), and the liver expression of receptor for AGE (RAGE) in comparison with those for mice of the HF group. Histological analyses of liver samples showed decreased lipid accumulation in hepatocytes in mice administrated with RE in comparison with that of HF-diet-fed mice. Meanwhile, RE administration enhanced fecal lipid excretion to inhibit lipid absorption and increased the liver GSH/GSSG ratio to perform antioxidant activity compared with HF group. Our results demonstrate that rosemary is a promising dietary agent to reduce the risk of obesity and metabolic syndrome.

• Authors: Yantao Zhao, Rashin Sedighi, Pei Wang, Huadong Chen, Yingdong Zhu, Shengmin Sang
• Journal: Journal of agricultural and food chemistry (J Agric Food Chem) Vol. 63 Issue 19 Pg. 4843-52 (May 20 2015) ISSN: 1520-5118 [Electronic] United States
• PMID: 25929334 (Publication Type: Journal Article, Research Support, U.S. Gov't, Non-P.H.S.)

Chemical References

• Abietanes
• Dietary Fats
• Glycation End Products, Advanced
• Plant Extracts
• Receptor for Advanced Glycation End Products
• Receptors, Immunologic
• Triglycerides
• salvin

Topics

• Abietanes (administration & dosage, chemistry, isolation & purification)
• Animals
• Diet, High-Fat (adverse effects)
• Dietary Fats (metabolism)
• Dietary Supplements (analysis)
• Glycation End Products, Advanced (blood)
• Humans
• Male
• Metabolic Syndrome (drug therapy, genetics, metabolism)
• Mice
• Mice, Inbred C57BL
• Obesity (drug therapy, genetics, metabolism)
• Plant Extracts (administration & dosage, chemistry, isolation & purification)
• Receptor for Advanced Glycation End Products
• Receptors, Immunologic (genetics, metabolism)
• Rosmarinus (chemistry)
• Triglycerides (metabolism)