The Bidirectional Gut-Lung Axis in Chronic Obstructive Pulmonary Disease

Area of Science:

• Pulmonary Medicine
• Gastroenterology
• Microbiology

Background:

• Chronic obstructive pulmonary disease (COPD) is epidemiologically associated with intestinal health alterations.
• Cigarette smoking, a primary COPD cause, impacts the gastrointestinal system, exacerbating intestinal diseases.
• Existing research highlights gut-lung interactions but lacks a comprehensive overview of COPD-specific mechanisms.

Approach:

• This review synthesizes findings from clinical studies, animal models, and in vitro research.
• It examines the bidirectional communication pathways between the lungs and gut in COPD.
• Mechanisms investigated include circulating inflammatory cells/mediators, gut microbiota dysbiosis, and systemic factors.

Key Points:

• Gut microbiota dysbiosis in COPD patients contributes to a compromised mucosal environment and immune dysfunction.
• Systemic hypoxia and oxidative stress, characteristic of COPD, may drive intestinal dysfunction.
• The gut-lung axis in COPD involves complex interactions affecting both pulmonary and gastrointestinal health.

Conclusions:

• Understanding the gut-lung axis mechanisms is crucial for managing COPD-related intestinal issues.
• Dysbiosis, inflammation, hypoxia, and oxidative stress are key players in the COPD gut-lung axis.
• Future research may identify novel add-on therapies targeting intestinal dysfunction in COPD patients.