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Related Concept Videos

Irritable Bowel Syndrome I: Introduction01:17

Irritable Bowel Syndrome I: Introduction

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Irritable Bowel Syndrome (IBS) is characterized by functional disturbances in the gastrointestinal system, presenting a cluster of symptoms without evident structural or biochemical abnormalities. It primarily affects the large intestine and may cause abdominal pain, bloating, excessive gas, diarrhea, constipation, or both.
IBS is a chronic condition that can persist over a long period or recur frequently.
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Inflammatory Bowel Disease I: Ulcerative Colitis01:27

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Introduction
Inflammatory bowel disease, or IBD, encompasses a group of disorders characterized by chronic inflammation or ulceration of the gastrointestinal tract.
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The exact cause of IBD remains unclear, although it is believed to be due to a mix of genetic, environmental, microbial, and immune factors. Genetic factors are significant in determining susceptibility to IBD, with family history being a critical risk factor. Individuals with a first-degree relative who has IBD are at...
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Inflammatory Bowel Disease IV: Pharmacological Management01:29

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Upon diagnosis, managing Inflammatory Bowel Disease (IBD) involves addressing several crucial aspects. The primary goals include resting the bowel, correcting malnutrition, and providing symptomatic relief. Resting the bowel may consist of medications to reduce inflammation and promote healing. Correcting malnutrition is essential, often requiring dietary adjustments and nutritional supplements. Symptomatic relief aims to ease pain, diarrhea, and other discomforts in IBD.
Pharmacologic...
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Inflammatory Bowel Disease II: Crohn's Disease01:30

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Introduction
Inflammatory bowel disease, commonly known as IBD, refers to a collection of disorders that lead to persistent inflammation of the gastrointestinal tract. The two types of IBD are ulcerative colitis, which impacts the colon, and Crohn's disease, which can involve any part of the gastrointestinal segment.
Crohn's disease
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Chronic Bowel Disorders: Introduction01:17

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Chronic bowel diseases are a group of long-term conditions affecting the digestive tract, characterized by inflammation and damage to the gut lining. These conditions primarily include irritable bowel syndrome and inflammatory bowel disease.
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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.
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Updated: Sep 19, 2025

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Gene-environment interactions shape the host-microbial interface in inflammatory bowel disease.

Ken Cadwell1,2, P'ng Loke3

  • 1Division of Gastroenterology and Hepatology, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA. ken.cadwell@pennmedicine.upenn.edu.

Nature Immunology
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Summary
This summary is machine-generated.

Inflammatory bowel disease (IBD) involves complex gene-environment-microbiota interactions leading to chronic gut inflammation. Understanding these early events is key for personalized therapies targeting preclinical IBD.

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Area of Science:

  • Gastroenterology
  • Immunology
  • Microbiology

Background:

  • Inflammatory bowel disease (IBD) is a complex gut disorder driven by disrupted host-microbiota interactions.
  • Genetic predisposition and environmental factors, particularly microbial imbalances, are critical in IBD pathogenesis.
  • IBD involves a multi-hit process leading to chronic inflammation, tissue damage, and scarring.

Purpose of the Study:

  • To review the early events shaping IBD pathogenesis.
  • To explore the role of gene-environment interactions and microbial perturbations in IBD.
  • To discuss strategies for personalized therapies targeting host-microbiota interactions.

Main Methods:

  • Literature review of IBD pathogenesis.
  • Analysis of gene-environment interactions in IBD.
  • Examination of host-microbiota dynamics in gastrointestinal inflammation.

Main Results:

  • Early IBD events are significantly influenced by gene-environment interactions and microbial dysbiosis.
  • Host genetics modulate immune activation thresholds and disease severity, leading to varied progression.
  • Therapeutic outcomes in IBD are highly individualized.

Conclusions:

  • Targeting host-microbiota interactions during the preclinical phase offers potential for effective IBD therapies.
  • Addressing health disparities is crucial for equitable IBD management.
  • Personalized therapeutic strategies are needed to manage IBD variability.