Gut Microbiota Modulation in Constipation Management

Chronic constipation affects a substantial proportion of the global population and imposes a significant burden on quality of life and healthcare resources. Emerging evidence has illuminated the pivotal role of the gut microbiota in regulating intestinal motility, secretion and barrier function. Alterations in microbial composition—often termed dysbiosis—can impair short-chain fatty acid production, alter bile acid metabolism and modulate enteroendocrine signalling, collectively contributing to slowed transit and hard stool. Strategies to restore microbial balance include administration of probiotics, prebiotics, synbiotics, dietary fibre supplementation and faecal microbiota transplantation. These approaches aim to enrich beneficial taxa such as Bifidobacterium and Lactobacillus, enhance production of butyrate and propionate, and suppress methane-producing archaea linked to delayed gut transit. Beyond compositional shifts, microbial metabolites influence host pathways—for example, butyrate stimulates colonic smooth-muscle contraction, while bile acids modulate secretory reflexes. A deeper understanding of microbial–host interactions has also revealed that commonly used agents (for instance, loperamide) may exert direct antibacterial effects, underscoring the need to consider secondary microbiota changes when managing constipation. Translational research continues to refine personalised strategies for microbial modulation, offering promise for patients refractory to conventional therapies.

Research from Nature Portfolio

A study employing germ-free mice transplanted with stool from constipated donors demonstrated upregulation of the serotonin transporter (SERT) in colonic tissue, leading to reduced luminal serotonin levels and slowed transit. Microbial shifts included depletion of Clostridium and Lactobacillus with relative enrichment of Bacteroides and Akkermansia. Another investigation using pseudo-germ-free mice colonised with microbiota from slow-transit constipation patients revealed decreased faecal short-chain fatty acids and secondary bile acids, delayed gastrointestinal transit and weakened colonic contractility, indicating that restoration of microbial metabolites may reverse symptoms. A metagenomic profiling study of individuals with functional constipation uncovered lower abundance of Bacteroides, Roseburia and Coprococcus, alongside enrichment of hydrogen-producing and methanogenesis pathways; these findings suggest that targeting specific metabolic functions could alleviate constipation by restoring carbohydrate and lipid fermentation.

Gut Microbiota Modulation in Constipation Management publication trend

The graph below shows the total number of articles in gut microbiota modulation in constipation management across all publications each year (not limited to Nature Index journals).

Technical terms

Gut microbiota: The complex community of microorganisms residing in the gastrointestinal tract.

Dysbiosis: Disruption of the normal balance and diversity of the gut microbial community.

Fecal Microbiota Transplantation (FMT): Therapeutic transfer of stool from a healthy donor to a patient to restore microbial balance.

Short-chain fatty acids (SCFAs): Microbial fermentation products such as acetate, propionate and butyrate that influence gut physiology.

Serotonin transporter (SERT): Protein responsible for the re-uptake of serotonin in the gut and nervous system, affecting motility.

References

1. Anti-diarrheal drug loperamide induces dysbiosis in zebrafish microbiota via bacterial inhibition. Microbiome (2023).
2. Gastrointestinal Dysmotility Predisposes to Colitis through Regulation of Gut Microbial Composition and Linoleic Acid Metabolism. Advanced Science (2024).
3. Gut Microbiota and Chronic Constipation: A Review and Update. Frontiers in Medicine (2019).
4. Dysbiosis contributes to chronic constipation development via regulation of serotonin transporter in the intestine. Scientific Reports (2017).
5. Potential role of fecal microbiota from patients with slow transit constipation in the regulation of gastrointestinal motility. Scientific Reports (2017).
6. Unveiling the gut microbiota composition and functionality associated with constipation through metagenomic analyses. Scientific Reports (2017).
7. The Effect of Psyllium Husk on Intestinal Microbiota in Constipated Patients and Healthy Controls. International Journal of Molecular Sciences (2019).