Adipose tissue aging is regulated by an altered immune system

Area of Science:

• Gerontology
• Immunology
• Metabolic research

Background:

• Adipose tissue is crucial in aging, serving as a source of chronic inflammation.
• Aging leads to fat redistribution, reduced brown/beige fat, stem cell decline, and immune dysregulation in adipose tissue.
• Inflammaging, or chronic inflammation, is prevalent in aged adipose tissue, impairing its function and contributing to disease.

Purpose of the Study:

• To review the causes and consequences of adipose tissue inflammaging.
• To outline the cellular and molecular mechanisms driving adipose tissue inflammaging.
• To identify potential therapeutic targets for age-related adipose tissue dysfunction.

Main Methods:

• Literature review of studies on adipose tissue aging and inflammation.
• Analysis of molecular and cellular pathways involved in inflammaging.
• Synthesis of current understanding of immune cell roles in aged adipose tissue.

Main Results:

• Adipose tissue inflammaging reduces plasticity, promotes hypertrophy and fibrosis, leading to dysfunction.
• Inflammaging in adipose tissue is linked to diabetes, cardiovascular disease, and cancer.
• Increased immune cell infiltration and pro-inflammatory cytokine secretion characterize aged adipose tissue.

Conclusions:

• Adipose tissue inflammaging is a key driver of age-related physiological decline and disease.
• Understanding the complex role of immune cells and signaling pathways (JAK/STAT, NFκB, JNK) is critical.
• Targeting adipose tissue inflammaging offers potential therapeutic strategies for mitigating age-related health issues.