Peripheral and central macrophages in obesity

Area of Science:

• Immunology
• Metabolic disease research
• Neuroinflammation

Background:

• Obesity is linked to chronic, low-grade inflammation.
• Adipose tissue expansion triggers cellular stress and immune cell infiltration.
• Pro-inflammatory activation occurs in organs crucial for energy metabolism, contributing to co-morbidities.

Purpose of the Study:

• To review the roles of peripheral and central macrophages in metabolic disease.
• To explore how macrophages interact with other immune cells to promote inflammation in obesity.
• To highlight the involvement of macrophages and microglia in obesity-induced neuroinflammation and appetite regulation.

Main Methods:

• Literature review focusing on macrophage activation in obesity.
• Analysis of immune cell interactions in adipose tissue and the central nervous system (CNS).
• Examination of the link between neuroinflammation and metabolic disturbances.

Main Results:

• Adipose tissue macrophages (ATMs) are key players in obesity pathogenesis.
• Obesity-induced inflammation extends to the liver, muscle, pancreas, and CNS.
• Microglia, the brain's resident macrophages, are activated in obesity and influence feeding circuits.

Conclusions:

• Macrophages, both peripheral and central, play significant roles in metabolic diseases associated with obesity.
• Understanding macrophage and microglia activation is crucial for addressing obesity-related co-morbidities.
• Targeting immune cell inflammation may offer therapeutic strategies for metabolic disorders.