Researchers Propose 4-Step Gut-Brain Model for Chronic Constipation, Which Affects Up to 15%
Updated
Updated · ScienceAlert · Jul 13
Researchers Propose 4-Step Gut-Brain Model for Chronic Constipation, Which Affects Up to 15%
3 articles · Updated · ScienceAlert · Jul 13
Summary
A Frontiers in Immunology study lays out a four-part “Trigger–Gateway–Hub–Effector” framework to explain how chronic constipation—especially slow-transit constipation—may arise from gut-brain axis dysfunction.
Gut dysbiosis sits at the model’s “Trigger,” with altered microbial metabolites potentially weakening the intestinal barrier, the “Gateway,” and creating conditions for inflammation and disrupted signaling rather than directly causing motility failure.
That disruption then converges in the ENS microenvironment—the “Hub”—before reaching the enteric nervous system itself, the “Effector,” where neuronal loss, neurochemical imbalance or pacemaker-cell dysfunction could impair peristalsis.
Up to 15% of people worldwide are affected, but the authors say evidence remains moderate and is drawn largely from observational, animal and in vitro studies rather than direct human mechanistic proof.
The framework points to combination treatments beyond laxatives, including probiotics, prebiotics, fecal transplants, immune-targeting approaches and therapies aimed at protecting ENS neurons or pacemaker cells.