Gastroesophageal reflux disorders and asthma

Area of Science:

• Gastroenterology
• Pulmonology
• Clinical Medicine

Background:

• Gastroesophageal reflux (GERD) is frequently observed in asthma patients, with up to 77% experiencing reflux symptoms.
• Esophagitis affects 43% of asthma patients, and 82% show abnormal esophageal acid exposure via pH testing, confirming GERD's prevalence.

Purpose of the Study:

• To investigate the link between GERD and asthma.
• To explore the pathophysiologic mechanisms connecting GERD and asthma.
• To evaluate the efficacy of antireflux therapy in improving asthma symptoms.

Main Methods:

• Review of existing literature on GERD and asthma.
• Analysis of pathophysiologic mechanisms, including vagal reflexes, microaspiration, and substance P release.
• Assessment of preliminary therapeutic studies on antireflux interventions for asthma.

Main Results:

• GERD is highly prevalent in asthma patients, with significant esophageal acid abnormalities.
• Potential mechanisms linking GERD to asthma include vagal reflexes, microaspiration, and inflammatory mediators like substance P.
• Antireflux therapy shows potential for asthma improvement in up to 70% of patients, particularly those with symptomatic regurgitation or abnormal proximal acid exposure.

Conclusions:

• GERD is a significant comorbidity in asthma, potentially triggering or exacerbating airway symptoms.
• Antireflux therapy may be a viable treatment option for improving asthma control in select patient populations.
• Further research is needed to fully elucidate the complex relationship between asthma and GERD.