Similar Symptoms, Distinct Syndromes: Multi-modal Approach to the Patient with an IBD-IBS Overlap

Area of Science:

• Gastroenterology
• Immunology
• Microbiome Research

Background:

• Inflammatory bowel disease (IBD) and irritable bowel syndrome (IBS) are distinct gastrointestinal disorders.
• Both conditions frequently present with overlapping symptoms like abdominal pain and altered bowel habits.
• IBD involves chronic inflammation, while IBS is characterized by symptoms without inflammation.

Purpose of the Study:

• To review the shared underlying mechanisms of IBD and IBS.
• To address the diagnostic and therapeutic challenges posed by IBD-IBS overlap.
• To outline a comprehensive, multimodal treatment strategy for patients with IBD-IBS overlap.

Main Methods:

• Literature review synthesizing emerging evidence on IBD and IBS.
• Analysis of shared pathophysiological mechanisms including immune activation, barrier dysfunction, and gut-brain axis.
• Examination of microbiome alterations and their role.

Main Results:

• IBD-IBS overlap symptoms can stem from lingering immune activation, impaired barrier function, visceral hypersensitivity, gut-brain axis dysfunction, or microbiome changes.
• Shared mechanisms contribute to symptom persistence even after IBD inflammation remission.
• Multimodal approaches are necessary for effective management.

Conclusions:

• Understanding shared mechanisms is crucial for managing IBD-IBS overlap.
• A multimodal treatment approach integrating pharmacologic, dietary, mind-body, and microbiome-directed strategies is recommended.
• Further research into these shared pathways can improve patient outcomes.