Intestinal Barrier Impairment, Preservation, and Repair: An Update.
Level 5 - mechanism / opinion, no new human data
Narrative literature review without systematic methodology or meta-analysis
PubMed 39458489 · doi:10.3390/nu16203494
What was done
The authors conducted a literature review on intestinal barrier function and permeability using keywords such as intestinal barrier, permeability, microbiome, epigenomics, diet, irritable bowel syndrome, inflammatory bowel disease, and probiotics. The review examined the deleterious effects of dietary fat, the role of specific nutrients and the microbiome, epigenomic regulation of junction proteins, and dietary interventions for barrier restoration.
What was found
The abstract reports no quantitative data or effect sizes. Qualitatively, it reports that dietary fat increases intestinal permeability, whereas nutrients including fiber, glutamine, zinc, vitamin D, polyphenols, emulsifiers, and anthocyanins decrease permeability. It also notes that commensals, probiotics, and products like short-chain fatty acids exert anti-inflammatory and barrier-protective effects, with epigenomic modifications influencing junction proteins and inflammation.
Why it matters
This paper summarizes mechanisms of gut barrier breakdown and highlights potential nutritional and microbial targets to preserve or repair intestinal permeability in gastrointestinal disorders.
Limits
As a narrative review, it lacks systematic search protocols, formal inclusion criteria, risk-of-bias evaluation, and quantitative meta-analysis. The abstract provides no numerical data or sample sizes and does not distinguish between preclinical models and human clinical trial findings.
Cited by
- supports The gut microbiome functions to support and maintain the integrity of the intestinal epithelial barrier (gut lining).