Cardiovascular abnormalities associated with human and rodent obesity

Area of Science:

• Cardiovascular Science
• Obesity Research
• Animal Models

Background:

• Obesity is a significant risk factor for cardiovascular disease (CVD).
• Establishing a direct link is challenging due to comorbidities like diabetes and hypertension.
• Obesity is associated with cardiac hypertrophy and impaired ventricular function in humans.

Purpose of the Study:

• To review cardiovascular adaptations in rodent models of obesity.
• To understand the cardiac manifestations of obesity.
• To evaluate the impact of weight reduction and cycling on cardiovascular health.

Main Methods:

• Review of existing literature on rodent models of obesity.
• Analysis of cardiovascular function in Zucker rats, JCR:LA-cp rats, and dietary-induced obese rats.
• Examination of cardiac hypertrophy, ventricular function, and hemodynamic alterations.

Main Results:

• Obese Zucker rats show delayed cardiac function decline and mild hypertension.
• JCR:LA-cp rats develop atherosclerosis and myocardial lesions, with calcium-dependent function impairment.
• Dietary-induced obese rats exhibit hemodynamic changes but not severe cardiac depression.

Conclusions:

• Rodent models offer insights into obesity-related cardiovascular changes.
• Weight cycling may have detrimental cardiovascular effects.
• Continued research is essential to fully characterize cardiac manifestations of obesity.