Alterations in Intestinal Permeability: The Role of the "Leaky Gut" in Health and Disease.
Authors: Stewart Amy Stieler, Pratt-Phillips Shannon, Gonzalez Liara M
Journal: Journal of equine veterinary science
Summary
# Editorial Summary: Intestinal Permeability in Equine Health Compromise of the equine intestinal barrier—commonly termed "leaky gut"—permits translocation of microbial toxins and pathogens across the mucosa, precipitating systemic disease and performance deterioration that can prove fatal if left unaddressed. Stieler, Pratt-Phillips and Gonzalez reviewed the physiological mechanisms underpinning barrier integrity alongside the diverse aetiologies of barrier dysfunction, which include physical stress, reduced mesenteric perfusion, inflammatory conditions, and infectious agents, whilst synthesising diagnostic approaches applicable across clinical and research environments. The authors emphasise that intestinal permeability disturbances represent multifactorial problems without singular causation, necessitating sophisticated understanding of host immune regulation and barrier pathophysiology to inform targeted interventions. For equine professionals, recognising the spectrum of conditions capable of compromising barrier function—from transportation stress to colic-related ischaemia—becomes essential for early detection and prevention of secondary complications that extend beyond primary gastrointestinal disease. This review underscores the clinical imperative for developing and validating alternative therapeutic strategies to restore and maintain intestinal barrier function, positioning barrier health as a cornerstone of equine performance and longevity.
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Practical Takeaways
- •Recognize that intestinal barrier dysfunction can result from diverse triggers (stress, ischemia, infection, inflammation), requiring thorough differential diagnosis to identify the underlying cause.
- •Understand that leaky gut may be a significant but underrecognized contributor to poor performance and health crises in practice; screening for barrier dysfunction could improve outcomes.
- •Consider optimizing intestinal barrier function as part of preventive health management, particularly in high-stress horses or those with recurrent gastrointestinal or systemic issues.
Key Findings
- •Leaky gut results from multiple causes including physical stressors, decreased blood flow, inflammatory disease, and pathogenic infections in horses.
- •Compromised intestinal barrier allows harmful luminal contents including microbial toxins and pathogens to breach normal defenses.
- •Barrier dysfunction represents a major cause of decreased performance and death in equine populations.
- •Multiple testing methods exist to diagnose altered intestinal permeability in clinical and research settings.