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Related Concept Videos

Inflammatory Bowel Disease III: Diagnostic Studies and Management I-Nutritional Therapy01:30

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Various diagnostic tests are employed in the diagnostic process for Inflammatory Bowel Disease (IBD), particularly to differentiate between Crohn's disease and ulcerative colitis.
Diagnostic studies
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Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...
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Drugs for Treatment of Ulcerative Colitis in IBD01:29

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Ulcerative colitis is a chronic inflammatory condition primarily affecting the colon and rectum. The primary drugs used in the treatment of ulcerative colitis are aminosalicylates. They exhibit anti-inflammatory and immunosuppressive properties. They modulate inflammatory mediators and inhibit the activity of nuclear factor κB (NF-κB). Aminosalicylates also reduce inflammation by inhibiting prostaglandin and leukotriene production and decreasing neutrophil chemotaxis and superoxide...
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Drugs for Peptic Ulcer Disease: Sucralfate as Mucosal Protective Agents01:24

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In the intricate landscape of the gastric lumen, excessive acid secretion disrupts the natural defense mechanisms, weakening the mucus-bicarbonate barrier. This vulnerability allows pepsin to infiltrate epithelial cells, digesting mucosal proteins and triggering erosion, leading to ulcer formation.
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Peptic Ulcer Disease IV: Management

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Medical treatment strategies for peptic ulcers encompass various methods. The primary goal of treatment is to diminish gastric acidity and strengthen mucosal defense mechanisms.
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Introduction
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Risk Factors
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Updated: Sep 9, 2025

Analyzing Beneficial Effects of Nutritional Supplements on Intestinal Epithelial Barrier Functions During Experimental Colitis
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Functional Profiling Demonstrates That a Sulfide-Reducing Diet Achieves Microenvironmental Targets in Ulcerative

Alice S Day1,2, Rachael Slater3, Remy B Young4,5

  • 1Inflammatory Bowel Disease Service, Department of Gastroenterology and Hepatology, Queen Elizabeth Hospital, Adelaide, SA, Australia.

Inflammatory Bowel Diseases
|September 3, 2025
PubMed
Summary
This summary is machine-generated.

The 4-SURE diet reduced harmful gut bacteria and hydrogen sulfide (H2S) production in ulcerative colitis patients. This dietary intervention successfully modulated the gut environment, decreasing protein fermentation markers.

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Area of Science:

  • Gastroenterology
  • Microbiome Research
  • Nutritional Science

Background:

  • Ulcerative colitis (UC) involves excessive protein fermentation and hydrogen sulfide (H2S) production in the colon.
  • The 4-SURE (4 Strategies to Sulfide Reduction) diet aims to correct these pathogenic alterations.
  • Understanding the diet's impact on the gut environment is crucial for UC management.

Purpose of the Study:

  • To conduct a deep functional analysis of microbial and metabolomic changes in UC patients on the 4-SURE diet.
  • To determine if the 4-SURE diet effectively modulates the colonic environment by reducing H2S production and protein fermentation.
  • To explore the diet's effect on gut microbial diversity and specific bacterial groups.

Main Methods:

  • Fecal samples were collected from 28 adults with mild-moderate UC at baseline and after 8 weeks of the 4-SURE diet.
  • Metagenomic sequencing was used to analyze changes in H2S-metabolizing genes.
  • Gas chromatography-mass spectrometry analyzed fecal volatile organic compounds and H2S production.

Main Results:

  • The 4-SURE diet significantly increased gut microbial alpha diversity.
  • Abundance of H2S-producing genera (Odoribacter, Peptostreptococcaceae) decreased significantly.
  • Fecal H2S production and indole levels (a protein fermentation marker) were significantly reduced.

Conclusions:

  • The 4-SURE diet successfully met its objectives in modulating the colonic environment.
  • Deep functional analysis provides a novel framework for evaluating therapeutic diet strategies in UC.
  • Microbial and metabolomic biomarkers are valuable for assessing the efficacy of dietary interventions.