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Related Concept Videos

Autoimmune Disorders01:29

Autoimmune Disorders

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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.
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Gastritis is marked by disruption of the mucosal barrier that usually protects the stomach tissue from digestive juices and manifests in acute and chronic forms.
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
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T Cell Types and Functions01:24

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When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
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Functional autoantibodies in systemic sclerosis pathogenesis.

Angela Kill1, Gabriela Riemekasten

  • 1Department of Rheumatology and Clinical Immunology, University Hospital Charité, Luisenstraße 13, 10117, Berlin, Germany, Angela.Kill@charite.de.

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Functional autoantibodies are implicated in systemic sclerosis (SSc) pathogenesis, potentially driving organ damage. Understanding these antibodies offers new therapeutic targets for SSc.

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Area of Science:

  • Immunology
  • Rheumatology
  • Pathogenesis of Systemic Sclerosis

Background:

  • Antinuclear autoantibodies are crucial for diagnosing systemic sclerosis (SSc) and predicting organ involvement.
  • Transferring IgG from SSc patients to mice induces interstitial lung disease and vasculopathy, highlighting antibody roles in SSc.
  • Functional autoantibodies, including those against angiotensin II receptor type-1 and endothelin1 receptor type-A, are linked to severe SSc.

Purpose of the Study:

  • To review the characteristics of functional autoantibodies in systemic sclerosis.
  • To explore the role of these autoantibodies in SSc pathogenesis, vasculopathy, immune activation, and fibrosis.
  • To discuss the potential of functional autoantibodies as therapeutic targets in SSc.

Main Methods:

  • Review of existing literature on functional autoantibodies in systemic sclerosis.
  • Analysis of studies investigating the pathogenic mechanisms of autoantibodies in SSc.
  • Synthesis of findings linking specific autoantibodies to disease manifestations and outcomes.

Main Results:

  • Functional autoantibodies contribute to SSc pathogenesis, linking key disease features like vasculopathy, immune activation, and fibrosis.
  • Specific autoantibodies targeting angiotensin II receptor type-1 and endothelin1 receptor type-A are associated with severe disease.
  • Evidence suggests a causal role for antibodies in SSc-related organ damage, such as interstitial lung disease.

Conclusions:

  • Functional autoantibodies are a significant factor in the complex pathogenesis of systemic sclerosis.
  • These autoantibodies provide novel insights into SSc mechanisms and represent promising targets for future therapies.
  • Further research is needed to fully elucidate the contribution of specific autoantibodies to SSc manifestations.