Atherosclerosis: an insulin-dependent disease?

Area of Science:

• Nutrition Science
• Cardiovascular Disease Research
• Metabolic Health

Background:

• Dietary habits in developed nations, characterized by high-energy-density foods, are linked to increased hepatic cholesterol synthesis.
• This dietary pattern may promote lipogenic effects over lipolytic effects on the arterial intima, contributing to atheroma formation.
• Circulating insulin levels play a key role in mediating these diet-induced metabolic changes.

Purpose of the Study:

• To review evidence linking dietary habits, particularly high-energy food consumption, to atherosclerosis.
• To explore the role of circulating insulin levels in the development and progression of atherosclerotic lesions.
• To emphasize the importance of considering meal composition, size, spacing, and their impact on insulin dynamics in diet-atherosclerosis research.

Main Methods:

• Literature review of existing evidence on diet, cholesterol synthesis, insulin response, and atherosclerosis.
• Analysis of the proposed mechanisms by which dietary factors influence arterial wall metabolism.
• Synthesis of findings to highlight the relationship between insulin signaling and atheroma development.

Main Results:

• Increased frequency of high-energy-density food intake is associated with excessive hepatic cholesterol synthesis.
• Elevated circulating insulin levels, driven by frequent meals, may promote lipogenesis in the arterial intima.
• Prolonged exposure of the arterial wall to high insulin levels is suggested to favor atherosclerotic lesion development.

Conclusions:

• Dietary patterns significantly influence metabolic processes related to atherosclerosis.
• Insulin's role in mediating diet-atherosclerosis relationships warrants further investigation, considering meal timing and frequency.
• Future research should integrate meal composition, insulin response, and circadian metabolic rhythms to understand diet-atherosclerosis links comprehensively.