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Updated: Apr 23, 2026
An Experimental Model of Diet-Induced Metabolic Syndrome in Rabbit: Methodological Considerations, Development, and Assessment
Published on: April 20, 2018
Noninvasive metabolic syndrome model using an extremely small minipig, the microminipig
Takehiro Yamaguchi1, Takanori Yamazaki, Hiroaki Kawaguchi
1Department of Cardiovascular Medicine, Osaka City University Medical School, Japan.
Abstract:
Metabolic syndrome (MetS) induces serious complications; therefore, we developed a noninvasive MetS model using an extremely small minipig, the Microminipig. For 8 weeks, Microminipigs were administrated a high-fat and high-cholesterol diet (HFCD) for atherosclerosis and N(G)-nitro-l-arginine methyl ester (l-NAME) for inhibiting nitric oxide synthase. HFCD significantly increased serum low-density lipoprotein levels, l-NAME increased blood pressure and cardiac hypertrophy, and HFCD-induced aortal arteriosclerosis was accelerated by l-NAME administration. Endothelium-dependent relaxation of the coronary artery was remarkably decreased by l-NAME administration. This model may be useful for elucidating the mechanisms of MetS and developing new therapeutic medicines for its treatment.
Insights
Researchers created a novel animal model for metabolic syndrome (MetS) using Microminipigs. This model effectively mimics MetS complications, aiding in understanding and treating the condition.
Area of Science:
- Cardiovascular Research
- Metabolic Disease Modeling
- Animal Models
Background:
- Metabolic syndrome (MetS) is a cluster of conditions that increase the risk of heart disease, stroke, and type 2 diabetes.
- Developing accurate and noninvasive animal models is crucial for studying MetS pathophysiology and testing therapeutic interventions.
Purpose of the Study:
- To develop a noninvasive animal model of metabolic syndrome (MetS) using Microminipigs.
- To evaluate the efficacy of a high-fat, high-cholesterol diet (HFCD) combined with N(G)-nitro-l-arginine methyl ester (l-NAME) in inducing MetS-like characteristics.
Main Methods:
- Microminipigs were administered a high-fat, high-cholesterol diet (HFCD) and N(G)-nitro-l-arginine methyl ester (l-NAME) for 8 weeks.
- Key metabolic and cardiovascular parameters, including serum lipids, blood pressure, cardiac morphology, aortic arteriosclerosis, and coronary artery function, were assessed.
Main Results:
- HFCD significantly elevated serum low-density lipoprotein levels.
- l-NAME administration increased blood pressure and induced cardiac hypertrophy.
- l-NAME accelerated HFCD-induced aortic arteriosclerosis and markedly reduced endothelium-dependent coronary artery relaxation.
Conclusions:
- The Microminipig model successfully recapitulates key features of metabolic syndrome, including dyslipidemia, hypertension, cardiac hypertrophy, and vascular dysfunction.
- This noninvasive model provides a valuable platform for investigating MetS mechanisms and evaluating novel therapeutic strategies.
