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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.
Concept and Mechanism of Autoimmune Diseases
The immune...
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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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Skin Diseases and Disorders01:23

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Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...
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Hypersensitivity Reactions: Immune-Complex Reactions01:19

Hypersensitivity Reactions: Immune-Complex Reactions

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Type III hypersensitivity reactions occur when antigen–antibody complexes form and activate the complement system. Normally, these complexes help the clearance of antigens by phagocytes and red blood cells. However, when large numbers of immune complexes are present, they can deposit in tissues—particularly in the walls of blood vessels—leading to inflammation and tissue injury. These deposits trigger complement activation and neutrophil recruitment, resulting in serum...
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Immunodeficiency Diseases01:25

Immunodeficiency Diseases

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Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
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Related Experiment Video

Updated: Mar 23, 2026

A Silicosis Mouse Model Established by Repeated Inhalation of Crystalline Silica Dust
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A Silicosis Mouse Model Established by Repeated Inhalation of Crystalline Silica Dust

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Silica, Silicosis, and Autoimmunity.

Kenneth Michael Pollard1

  • 1Department of Molecular and Experimental Medicine, The Scripps Research Institute , La Jolla, CA , USA.

Frontiers in Immunology
|March 26, 2016
PubMed
Summary
This summary is machine-generated.

Inhaling crystalline silica dust can trigger autoimmune diseases like lupus and rheumatoid arthritis. Research suggests silica exposure activates immune responses, potentially leading to systemic autoimmune conditions.

Keywords:
animal modelautoimmunityhumansilicasilicosis

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Area of Science:

  • Immunology
  • Occupational Health
  • Environmental Medicine

Background:

  • Inhalation of crystalline silica dust is linked to acute and chronic diseases, including systemic autoimmune diseases.
  • Epidemiological studies associate occupational silica exposure with systemic lupus erythematosus, systemic sclerosis, and rheumatoid arthritis.

Purpose of the Study:

  • To explore the mechanisms by which silica exposure may lead to systemic autoimmune diseases.
  • To identify potential immune processes preceding silica-induced autoimmunity by examining silicosis pathophysiology.

Main Methods:

  • Review of existing literature on silica exposure, silicosis, and autoimmune disease pathogenesis.
  • Analysis of findings from human and animal model studies on silica's immunological effects.

Main Results:

  • Silica exposure initiates an inflammatory response in the lungs, involving macrophages and fibroblasts, leading to fibrosis.
  • The autoimmune pathogenesis appears to begin with innate immune system activation, cytokine production, and pulmonary inflammation.
  • This progresses to adaptive immunity activation, loss of tolerance, autoantibody production, and tissue damage, influenced by genetic factors.

Conclusions:

  • Silica-induced inflammation and fibrosis might be mechanistically distinct but both potentially contribute to autoimmunity.
  • Genetic factors and gene/environment interactions play a significant role in silica-induced autoimmunity.
  • Further research is needed to fully elucidate the unanswered questions regarding silica's role in autoimmune disease development.