Caloric restriction, body fat and ageing in experimental models

Area of Science:

• Gerontology
• Metabolic Science
• Obesity Research

Background:

• Aging is associated with increased body weight, fat mass, and altered fat distribution in rats.
• Increased fat mass, particularly visceral fat (abdominal obesity), is linked to the metabolic syndrome of aging in humans.
• The metabolic syndrome includes hyperinsulinaemia, dyslipidaemia, type 2 diabetes mellitus, atherosclerosis, hypercoagulability, and hypertension.

Purpose of the Study:

• To investigate the cause-effect relationship between increased fat mass and accelerated aging.
• To review experimental animal models that decrease fat mass to prevent age-related insulin resistance.
• To explore the potential application of these findings to human aging and associated pathologies.

Main Methods:

• Review of experimental animal models focusing on caloric restriction and fat mass reduction.
• Analysis of the role of adipose tissue in secreting factors contributing to insulin resistance.
• Examination of the impact of decreased visceral fat on aging parameters.

Main Results:

• Caloric restriction in animal models delays numerous age-related pathological conditions.
• Decreasing fat mass, especially visceral fat, in aging animals shows beneficial effects.
• Adipose tissue secretes factors implicated in the development of insulin resistance.

Conclusions:

• Reduced fat mass, particularly visceral fat, may mitigate age-related insulin resistance and associated pathologies.
• Findings from aging animal models suggest potential benefits for human aging and metabolic health.
• Targeting fat mass reduction could be a strategy to address age-related metabolic dysfunction.