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Related Concept Videos

Inflammatory Bowel Disease I: Ulcerative Colitis01:27

Inflammatory Bowel Disease I: Ulcerative Colitis

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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.
Risk Factors
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 II: Crohn's Disease01:30

Inflammatory Bowel Disease II: Crohn's Disease

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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
Crohn's disease is a chronic, systemic inflammatory bowel disease (IBD) that predominantly affects the gastrointestinal tract. It is marked by...
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Gastritis II: Pathophysiology01:26

Gastritis II: Pathophysiology

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The pathophysiology of gastritis begins with the colonization of the stomach lining by Helicobacter pylori (H. pylori). This bacterium spreads mainly via the oral-oral route through saliva or shared utensils, and can also be transmitted in overcrowded or unhygienic environments through contaminated water, despite its brief survival outside the body.ColonizationOnce ingested, H. pylori enters the stomach and begins colonization by navigating through the mucus layer lining the stomach wall. It...
52
Inflammatory Bowel Disease I: Introduction01:26

Inflammatory Bowel Disease I: Introduction

42
Inflammatory bowel disease is a group of chronic disorders marked by recurrent inflammation of the gastrointestinal tract due to an abnormal immune response against gut microflora. This leads to tissue damage. The two main forms are Crohn’s disease and ulcerative colitis.Crohn’s DiseaseCrohn’s disease is a relapsing inflammatory disorder that can affect any part of the GI tract, from the mouth to the anus. It involves all layers of the bowel wall (transmural) and shows...
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Inflammatory Bowel Disease II: Ulcerative Colitis01:20

Inflammatory Bowel Disease II: Ulcerative Colitis

34
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...
34
Inflammatory Bowel Disease III: Crohn's Disease01:25

Inflammatory Bowel Disease III: Crohn's Disease

35
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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Chronic Salmonella Infection Induced Intestinal Fibrosis
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Bacteria, inflammation, and colon cancer.

Liying Yang, Zhiheng Pei

    World Journal of Gastroenterology
    |November 16, 2006
    PubMed
    Summary

    The gut microbiome

    Area of Science:

    • Microbiology and immunology
    • Gastroenterology
    • Host-microbe interactions

    Background:

    • The colonic bacterial flora, once considered benign, presents both benefits and risks to the host.
    • Maintaining host mechanisms to manage physiological stresses associated with gut symbionts is crucial for health.
    • Host-microbe dysbiosis can lead to severe health consequences.

    Discussion:

    • Genetic deficiencies in host mechanisms reveal the pro-inflammatory and tumorigenic potential of normal gut flora.
    • Knockout mouse models demonstrate the impact of host genetic factors on managing symbiont interactions.
    • Understanding these interactions is key to deciphering disease pathogenesis.

    Key Insights:

    • The host-symbiont relationship is a delicate contract requiring active host management.

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  • Gut bacteria possess latent pro-inflammatory and tumorigenic properties.
  • Host genetic makeup significantly influences the outcome of symbiosis.

    • Outlook:

    • Further research into host-microbe interactions can illuminate the origins of inflammatory diseases and cancers.
    • Implications for human health are substantial, particularly in cancer and inflammatory disease research.
    • Targeting host-microbe pathways may offer novel therapeutic strategies.