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Probiotics

Probiotics

Probiotics are live, non-pathogenic microorganisms that confer health benefits by modulating the gut microbiota. The human gastrointestinal tract harbors a complex microbial ecosystem, and the balance of this microbiota is crucial for digestive and systemic health. Among the most extensively studied and utilized probiotics are species formerly classified within the genera Lactobacillus and Bifidobacterium. These organisms not only naturally colonize the human gut but are also consumed through...

Microbiota of the Stomach and Small Intestine

Microbiota of the Stomach and Small Intestine

The human gastrointestinal (GI) tract is characterized by distinct physicochemical conditions that shape its microbial communities. Among these, the stomach presents a particularly challenging environment for microbial colonization due to its highly acidic pH, ranging from 1 to 3. This extreme acidity effectively limits microbial density. However, certain acid-tolerant microorganisms are capable of surviving in this niche. Notably, Helicobacter pylori can colonize the gastric mucosa,...

Microbiota of the Large Intestine

Microbiota of the Large Intestine

The large intestine hosts the most densely populated microbial ecosystem in the human body. This complex community primarily consists of anaerobic bacteria, with Bacillota (formerly Firmicutes) and Bacteroidota (formerly Bacteroidetes) as the predominant groups. The distribution of these microbes varies along different sections of the large intestine, influenced by local environmental factors such as oxygen availability and nutrient composition.The cecum, located at the beginning of the large...

Functions of the Gut Microbiota

Functions of the Gut Microbiota

The gut microbiota includes trillions of microorganisms that colonize the human gastrointestinal tract, including bacteria, archaea, viruses, and fungi. This complex ecosystem plays a critical role in maintaining intestinal and systemic health. Most of these microbes inhabit the large intestine, establishing a relatively stable and diverse community that contributes to gut homeostasis through various metabolic, immunological, and protective mechanisms.Dominant bacterial phyla, such as...

Inflammatory Bowel Disease II: Ulcerative Colitis

Inflammatory Bowel Disease II: Ulcerative Colitis

Ulcerative colitis is a chronic inflammatory disorder of the colon characterized by continuous mucosal inflammation that typically begins in the rectum and extends proximally in a uniform pattern. Its pathogenesis involves a complex interplay of genetic predisposition, immune dysregulation, and environmental influences. These factors converge to impair the colon’s epithelial defenses and promote an exaggerated inflammatory response against luminal contents.Breakdown of the Mucosal...

Inflammatory Bowel Disease III: Crohn's Disease

Inflammatory Bowel Disease III: Crohn's Disease

Crohn’s disease is a chronic, relapsing form of inflammatory bowel disease characterized by segmental, transmural inflammation that can affect any part of the gastrointestinal tract. Its pathogenesis arises from a combination of genetic susceptibility, environmental exposures, epithelial barrier dysfunction, and immune dysregulation. Together, these factors lead to an exaggerated immune response against components of the gut microbiome.Genetic and Environmental InfluencesMultiple genetic...

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Related Experiment Video

Updated: Apr 30, 2026

Analyzing Beneficial Effects of Nutritional Supplements on Intestinal Epithelial Barrier Functions During Experimental Colitis

Analyzing Beneficial Effects of Nutritional Supplements on Intestinal Epithelial Barrier Functions During Experimental Colitis

Published on: January 5, 2017

Probiotics and barrier function in colitis.

P Gionchetti¹, K M Lammers, F Rizzello

¹Policlinic Sant'Orsola, Department of Internal Medicine and Gastroenterology, University of Bologna, Via Massarenti 9, 40138 Bologna, Italy. paolo@med.unibo.it

|June 14, 2005

Summary

This summary is machine-generated.

Probiotic supplements may protect against colitis by strengthening the gut lining and reducing inflammation. This research highlights probiotics as a potential therapeutic strategy for inflammatory bowel disease.

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Last Updated: Apr 30, 2026

Analyzing Beneficial Effects of Nutritional Supplements on Intestinal Epithelial Barrier Functions During Experimental Colitis

Analyzing Beneficial Effects of Nutritional Supplements on Intestinal Epithelial Barrier Functions During Experimental Colitis

Published on: January 5, 2017

Investigating Intestinal Barrier Breakdown in Living Organoids

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Published on: March 26, 2020

Assessment of Gut Barrier Integrity in Mice Using Fluorescein-Isothiocyanate-Labeled Dextran

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Published on: November 18, 2022

Area of Science:

Gastroenterology and Microbiology
Investigating the role of the gut microbiome in digestive health.

Background:

Colitis is characterized by inflammation and damage to the colon's mucosal lining.
Disruption of the mucosal barrier is a key factor in the progression of colitis.

Discussion:

Probiotic administration demonstrated a protective effect against colitis.
Mechanisms include preventing mucosal barrier disruption and mitigating the severity of mucosal injury.

Key Insights:

Probiotics may serve as a therapeutic intervention for colitis.
Maintaining mucosal barrier integrity is crucial for managing inflammatory bowel diseases.

Outlook:

Further research into specific probiotic strains and their efficacy in colitis models is warranted.
Exploring the long-term impact of probiotics on gut health and disease prevention.