Low-Grade Inflammation, Obesity, and Diabetes

Area of Science:

• Immunology
• Metabolic Diseases
• Microbiology

Background:

• Obesity is linked to adipose tissue inflammation, driven by factors like excess fatty acids, hypoxia, and inflammasome activation.
• This inflammation involves immune cells such as M1 macrophages and T lymphocytes, secreting cytokines that promote systemic inflammation and insulin resistance.

Purpose of the Study:

• To explore the mechanisms of obesity-induced adipose tissue inflammation.
• To understand the role of gut microbiota in obesity-related inflammation and insulin resistance.
• To identify factors contributing to metabolically healthy obesity.

Main Methods:

• Review of mechanisms triggering adipose tissue inflammation.
• Analysis of immune cell involvement in obesity.
• Investigation of gut microbiota's role via LPS-related endotoxemia.
• Examination of counter-regulatory mechanisms like innate lymphoid type 2 cells, regulatory T cells, and IL-10.

Main Results:

• Expanded adipose tissue creates an inflammatory environment.
• Immune cells (M1 macrophages, T lymphocytes) and cytokines perpetuate inflammation and insulin resistance.
• Gut microbiota contributes to inflammation and insulin resistance through LPS-related endotoxemia.

Conclusions:

• Obesity-induced inflammation is a complex process involving adipose tissue, immune cells, and the gut microbiota.
• Counter-inflammatory mechanisms can lead to a metabolically healthy obesity phenotype.
• Understanding these pathways is crucial for managing obesity comorbidities.