{"id":12695,"date":"2026-01-25T18:27:01","date_gmt":"2026-01-25T17:27:01","guid":{"rendered":"https:\/\/glutenlight.eu\/?p=12695"},"modified":"2026-01-25T18:33:42","modified_gmt":"2026-01-25T17:33:42","slug":"intestinal-permeability-low-grade-inflammation-ibs","status":"publish","type":"post","link":"https:\/\/glutenlight.eu\/?p=12695&lang=en","title":{"rendered":"Irritable Bowel Syndrome, Intestinal Permeability, and Low-Grade Chronic Inflammation \u2014 Scientific Review"},"content":{"rendered":"

(Related article no. 2: Irritable Bowel Syndrome (IBS) and Intestinal Permeability)<\/strong><\/a>
\n1. Introduction<\/strong>
\nIrritable Bowel Syndrome (IBS) is a chronic functional disorder of the gastrointestinal tract characterized by abdominal pain and altered bowel habits, in the absence of evident structural abnormalities. It is classified as a Disorder of Gut\u2013Brain Interaction (DGBI) and presents heterogeneous clinical phenotypes.<\/p>\n

2. Intestinal Permeability and IBS: Scientific Evidence<\/strong>
\n2.1 Clinical Review on Intestinal Permeability
\n\u201cIntestinal barrier dysfunction in irritable bowel syndrome: a systematic review\u201d
\nHanning et al. (2021) \u2014 Review of 66 studies on the role of the intestinal barrier in IBS.
\nSummary: Increased intestinal permeability is observed in a significant proportion of IBS patients, particularly in diarrhea-predominant (IBS-D) and post-infectious IBS (PI-IBS), while it is less frequent in constipation-predominant IBS (IBS-C) and nearly absent in mixed IBS (IBS-M). Increased permeability is also associated with greater symptom severity. (PubMed)<\/p>\n

2.2 Correlations Between Permeability and Clinical Factors
\nAnthropometric studies and challenge tests indicate that increased permeability is frequently associated with:
\nAlterations in tight junction proteins (e.g., occludin, ZO-1)
\nVisceral hypersensitivity
\nLocal and systemic inflammatory markers
\n(as shown in reviews on IBS and other gastrointestinal models) (Springer Nature)<\/p>\n

3. Intestinal Permeability and Low-Grade Chronic Inflammation<\/strong>
\n3.1 General Concept and Proposed Mechanisms
\n\u201cGut microbiota, intestinal permeability, and systemic inflammation: a narrative review\u201d
\nDi Vincenzo et al. (2023)
\nSummary: The intestinal barrier is a dynamic system integrated with the microbiota, nutrients, and immune system. Increased permeability (\u201cleaky gut\u201d) may facilitate the interaction between luminal antigens and immune cells, triggering pro-inflammatory activation. (MedNews Care)<\/p>\n

3.2 Interaction Between Inflammation and Barrier Function
\n\u201cIntestinal permeability \u2013 a new target for disease prevention and therapy\u201d
\nBMC Gastroenterology
\nSummary: Barrier dysfunction is associated with low-grade inflammation, visceral sensitivity, and IBS symptoms. Local inflammation may contribute to degradation of tight junction proteins, promoting a self-perpetuating cycle of permeability and inflammation. (SpringerLink)<\/p>\n

3.3 Bibliometrics and Research Trends
\n\u201cMapping research trends on intestinal permeability in IBS \u2026\u201d
\nRecent bibliometric analysis
\nSummary: There is growing research interest in microbiota, diet, intestinal permeability, and inflammation in IBS. Interactions among the intestinal barrier, microbiome, and nutritional\/environmental factors represent major emerging topics. (PubMed)<\/p>\n

4. Low-Grade Inflammation in IBS and Its Relationship with Permeability<\/strong>
\n4.1 Inflammatory Markers in IBS
\nPreview of meta-analysis (Digestive Diseases and Sciences, 2025)
\nSummary: Pro-inflammatory cytokines such as IL-6 and TNF-\u03b1 are frequently elevated in IBS patients, together with intestinal dysbiosis, suggesting chronic immune activation. (Springer Nature)<\/p>\n

4.2 Relationship Between Inflammation and Permeability
\n\u201cIncreased Intestinal Permeability and Decreased Barrier Function: Does It Really Influence the Risk of Inflammation?\u201d
\nSummary: Although increased permeability is associated with inflammatory markers in several diseases, a mandatory causal relationship is not demonstrated. Permeability may accompany inflammation but does not inevitably generate it. (PubMed)<\/p>\n

5. Synthesis: IBS Is Multifactorial \u2014 Permeability Is Not Mandatory<\/strong>
\nMain points of consensus:
\n1. Many IBS patients exhibit increased permeability, particularly IBS-D and PI-IBS, but many do not.
\n2. Low-grade chronic inflammation is common in IBS but not always accompanied by increased permeability.
\n3. Inflammation may contribute to barrier dysfunction, yet IBS-like symptoms can occur with normal permeability.
\nEmerging consensus model:
\nIntestinal permeability acts as a pathogenic amplifier in specific IBS subgroups, interacting with microbiota, diet, stress, and immune function, but it is not a universal prerequisite.<\/p>\n

6. Examples of Relevant Studies (Rapid Summary)<\/strong>
\nHanning et al., 2021 \u2014 IBS\/barrier systematic review
\nDi Vincenzo et al., 2023 \u2014 Microbiota\u2013permeability\u2013inflammation narrative review
\nDigestive Diseases and Sciences, 2025 \u2014 Inflammation & microbiome meta-analysis
\nBMC Gastroenterology \u2014 Barrier loss, mild inflammation, visceral sensation
\nBibliometric analysis \u2014 IBS\/permeability research trends<\/p>\n

7. Conceptual Conclusions<\/strong>
\nIBS is multifactorial, and its pathophysiology cannot be reduced to a single \u201cbarrier defect.\u201d
\nIncreased permeability and low-grade inflammation may co-occur but are not universal.
\nTheir presence depends on clinical phenotype, microbiota composition, immune factors, diet, and psychobiological stress. Clinical assessment should consider biomarkers, microbiota, and immune-barrier interactions, not epithelial integrity alone.<\/p>\n","protected":false},"excerpt":{"rendered":"

(Related article no. 2: Irritable Bowel Syndrome (IBS) and Intestinal Permeability) 1. Introduction Irritable Bowel Syndrome (IBS) is a chronic functional disorder of the gastrointestinal tract characterized by abdominal pain and altered bowel habits, in the absence of evident structural abnormalities. It is classified as a Disorder of Gut\u2013Brain Interaction (DGBI) and presents heterogeneous clinical […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[73],"tags":[2221,2229,2227,2215,2213,2217,2219,2223,2225,2101],"class_list":["post-12695","post","type-post","status-publish","format-standard","hentry","category-article","tag-gut-barrier-dysfunction","tag-gut-brain-axis-ibs","tag-ibs-pathophysiology","tag-intestinal-permeability-ibs","tag-irritable-bowel-syndrome-inflammation","tag-leaky-gut-ibs","tag-low-grade-inflammation-ibs","tag-microbiota-and-ibs","tag-tight-junctions-gut","tag-visceral-hypersensitivity"],"yoast_head":"\nIntestinal Permeability and Low-Grade Inflammation in IBS - Glutenlight<\/title>\n<meta name=\"description\" content=\"Scientific review on the relationship between intestinal permeability, low-grade chronic inflammation, and irritable bowel syndrome, with current evidence and mechanisms.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/glutenlight.eu\/?p=12695&lang=en\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Intestinal Permeability and Low-Grade Inflammation in IBS - 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