Pulmonary function changes in older adults with and without metabolic syndrome

Area of Science:

• Pulmonology
• Immunology
• Metabolic Disorders
• Geriatrics

Background:

• Low-grade inflammation from metabolic syndrome (MS) affects multiple organs.
• Lung function impairment is common in older adults, but MS effects are unclear.
• Understanding MS impact on lung immunity is crucial for aging populations.

Purpose of the Study:

• To determine if MS alters pulmonary function and immunological responses in older adults.
• To investigate the relationship between MS and lung mechanics.
• To assess inflammatory and fibrotic markers in individuals with and without MS.

Main Methods:

• Cross-sectional study comparing older adults with and without MS (n=77 each).
• Impulse oscillometry used to measure airway and tissue resistance and reactance.
• Blood and breath condensate analyzed for inflammatory, anti-inflammatory, and fibrotic biomarkers.

Main Results:

• Individuals with MS showed significantly higher respiratory system resistance (total, proximal, and distal airways).
• Increased levels of pro-inflammatory (leptin, IL-1beta, IL-8, TNF-alpha) and anti-inflammatory cytokines were observed in MS group.
• Both anti-fibrotic (relaxin 1, relaxin 3, Klotho) and pro-fibrotic (VEGF) factors were elevated in individuals with MS.

Conclusions:

• Metabolic syndrome adversely affects lung mechanics, function, and immune responses in older adults.
• Findings suggest a metabolic basis for lung 'inflammaging' in individuals with MS.
• The lungs may represent a therapeutic target for managing immune responses and delaying lung dysfunction in older adults with MS.