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Related Concept Videos

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Inflammatory Bowel Disease III: Crohn's Disease

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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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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...
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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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Acute Inflammation II: Local and Systemic Effects01:25

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Acute inflammation produces a coordinated set of local and systemic changes that limit injury, eliminate pathogens, and initiate repair. These responses arise within minutes of infection, trauma, or chemical insult and are driven by vascular alterations and leukocyte-derived mediators. When the stimulus resolves, the reaction typically abates within days.Local EffectsAt the site of injury, arteriolar vasodilation increases blood flow, resulting in redness and warmth. Simultaneously, increased...
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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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The inflammatory response is the body's defense against infection, injury, or irritation from bacteria, trauma, toxins, or heat. Inflammation helps locate and destroy pathogens and remove damaged tissue elements to heal the body. During this initial phase, fluid, blood products, and nutrients migrate to the injured area, resulting in redness, heat, swelling, ache, and loss of function. Moreover, signs of systemic inflammation include fever, increased WBC count, malaise, anorexia, nausea,...
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Related Experiment Video

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A Protein Microarray Assay for Serological Determination of Antigen-specific Antibody Responses Following Clostridium difficile Infection
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The systemic inflammatory response to Clostridium difficile infection.

Krishna Rao1, John R Erb-Downward2, Seth T Walk3

  • 1Division of Infectious Diseases, the University of Michigan School of Medicine, Ann Arbor, Michigan, United States of America; Department of Internal Medicine, the University of Michigan School of Medicine, Ann Arbor, Michigan, United States of America; Division of Infectious Diseases, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, Michigan, United States of America.

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The systemic inflammatory response during Clostridium difficile infection (CDI) involves various mediators. Severe CDI cases show distinct inflammatory profiles compared to non-severe infections.

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Area of Science:

  • Infectious Diseases
  • Immunology
  • Clinical Medicine

Background:

  • The systemic inflammatory response in Clostridium difficile infection (CDI) is not fully understood, especially in severe cases.
  • CDI is a significant cause of healthcare-associated infections.

Purpose of the Study:

  • To investigate the systemic inflammatory mediator profiles in patients with CDI.
  • To differentiate inflammatory responses between severe and non-severe CDI cases.

Main Methods:

  • Analysis of 315 blood samples from 78 CDI patients, 100 inpatient controls, and 137 outpatient controls.
  • Quantification of 30 circulating inflammatory mediators using antibody-linked bead arrays.
  • Statistical analysis including Principal Component Analysis (PCA), MANOVA, and logistic regression.

Main Results:

  • CDI cases exhibited a different inflammatory profile compared to outpatient controls, but not inpatient controls.
  • Chemokine (C-C motif) ligand 5 (CCL5) levels were associated with CDI in logistic regression.
  • Severe CDI cases showed elevated levels of IL-8, IL-6, and eotaxin.

Conclusions:

  • A broad systemic inflammatory response is present during CDI.
  • Severe CDI cases demonstrate distinct inflammatory signatures compared to non-severe infections.