[Irritable bowel syndrome: a functional disorder?]

Area of Science:

• Gastroenterology and microbiome research.
• Investigating the complex pathophysiology of functional gastrointestinal disorders.

Context:

• Irritable bowel syndrome (IBS) is a prevalent condition causing significant healthcare costs and lost workdays.
• Current diagnostic approaches for IBS rely on excluding organic diseases due to the lack of specific biomarkers.
• Multiple potential pathophysiological mechanisms have been proposed, including sensory-motor disturbances, stress, and neurochemical imbalances.

Purpose:

• To review and synthesize published evidence on the role of gut microbiota in irritable bowel syndrome (IBS).
• To explore emerging insights into IBS mechanisms, particularly those related to microbial changes.

Summary:

• Gut microbiota alterations are increasingly recognized as a significant factor in IBS.
• Studies on small intestinal bacterial overgrowth, antibiotic effects, post-infectious IBS, probiotics, and carbohydrate malabsorption shed light on microbial contributions.
• These mechanisms may explain IBS in a specific patient subgroup.

Impact:

• Advances understanding of IBS pathophysiology beyond traditional models.
• May lead to novel diagnostic strategies and targeted therapeutic interventions focusing on the gut microbiome.
• Highlights the importance of considering microbial factors in functional gastrointestinal disorders.