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Related Concept Videos

Inflammatory Bowel Disease III: Crohn's Disease01:25

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...
Inflammatory Bowel Disease II: Crohn's Disease01:30

Inflammatory Bowel Disease II: Crohn's Disease

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 transmural...
Inflammatory Bowel Disease I: Ulcerative Colitis01:27

Inflammatory Bowel Disease I: Ulcerative Colitis

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...
Inflammatory Bowel Disease IV: Clinical Manifestations01:20

Inflammatory Bowel Disease IV: Clinical Manifestations

Inflammatory bowel disease (IBD) encompasses two major chronic disorders—ulcerative colitis and Crohn’s disease—each characterized by relapsing episodes of gastrointestinal inflammation. Although they share certain clinical features, their patterns of involvement and manifestations differ in ways that aid diagnosis and guide management.Ulcerative ColitisUlcerative colitis is limited to the colon and rectum and involves continuous inflammation of the mucosal layer. The disease course is marked...
Graves' Disease I: Introduction01:28

Graves' Disease I: Introduction

Graves' disease is an autoimmune disorder that causes hyperthyroidism, or overactivity of the thyroid gland. It results from autoantibodies called thyroid-stimulating immunoglobulins (TSIs), which bind to thyroid-stimulating hormone (TSH) receptors, leading to overstimulation of hormone production and a hypermetabolic state.EtiologyAlthough considered idiopathic, Graves’ disease has well-established contributing factors. There is a strong genetic component, with increased prevalence in...
Autoimmune Disorders01:29

Autoimmune Disorders

Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
Concept and Mechanism of Autoimmune Diseases
The immune system...

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Related Experiment Video

Updated: May 26, 2026

Dioscin Mediated IgA Nephropathy Alleviation by Inhibiting B Cell Activation In Vivo and Decreasing Galactose-Deficient IgA1 Production In Vitro
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[IgG4 related disease].

Marion Hermet1, Jean-Louis Kémény, Gaëlle Guettrot-Imbert

  • 1CHU G.-Montpied, service de médecine interne, Clermont-Ferrand cedex 1, France. marionhermet@gmail.com

Presse Medicale (Paris, France : 1983)
|December 14, 2011
PubMed
Summary
This summary is machine-generated.

Immunoglobulin G4 (IgG4) related disease is a systemic disorder affecting multiple organs, characterized by high IgG4 levels and fibrosis. While sensitive to steroids, its exact autoimmune mechanism and IgG4

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Area of Science:

  • Rheumatology and Immunology: Focuses on IgG4-related disease (IgG4 RD), a systemic autoimmune condition.

Context:

  • IgG4 RD initially recognized as autoimmune pancreatitis, now understood as a multi-organ disorder.
  • Characterized by elevated serum IgG4 levels, tissue fibrosis, and IgG4-positive plasma cell infiltration.
  • High prevalence in Eastern countries, with ongoing research into its mechanisms and Western prevalence.

Purpose:

  • To review the current understanding of IgG4-related disease (IgG4 RD).
  • To discuss the diagnostic criteria, pathophysiology, and treatment indications for IgG4 RD.
  • To highlight the ongoing debate regarding the autoimmune or allergic nature of IgG4 RD.

Summary:

  • IgG4 RD is a steroid-responsive systemic disease with characteristic IgG4+ plasma cell infiltration and fibrosis.
  • The precise role of IgG4, an antibody subclass with anti-inflammatory properties, in IgG4 RD pathogenesis remains unclear.
  • Spontaneous regression occurs in some cases, complicating treatment guidelines.

Impact:

  • Contributes to the characterization of IgG4 RD, particularly in Western populations.
  • Informs ongoing research into the autoimmune mechanisms and therapeutic strategies for IgG4 RD.
  • Aids in refining diagnostic criteria and understanding the clinical course of this complex disorder.