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Related Concept Videos

Myasthenia Gravis ll: Pathophysiology01:22

Myasthenia Gravis ll: Pathophysiology

The disease process of myasthenia gravis begins at the neuromuscular junction, where antibodies attack key proteins needed for muscle activation. This immune reaction weakens signal transmission, leading to the characteristic muscle fatigue and weakness that define the condition.Immune-Mediated DamageIn most individuals, antibodies target acetylcholine receptors (AChRs) on the postsynaptic membrane of muscle cells. By blocking acetylcholine binding, these antibodies prevent the nerve signal...
Myasthenia Gravis: Overview and Treatment01:20

Myasthenia Gravis: Overview and Treatment

Myasthenia gravis is a neuromuscular transmission disorder characterized by weakness and increased fatigability of skeletal muscles. It is an autoimmune disease affecting approximately one in 2000 people, where antibodies against the α1 subunit of nicotinic acetylcholine receptors are produced.
These antibodies interfere with the function of the nicotinic receptors in three ways: by binding to the receptor and disrupting acetylcholine binding; by causing cross-linking of receptors which leads...
Myocarditis I: Introduction01:21

Myocarditis I: Introduction

Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
Myasthenia Gravis: Diagnostic Tests01:15

Myasthenia Gravis: Diagnostic Tests

Myasthenia gravis is an autoimmune condition affecting neuromuscular transmission, causing generalized weakness in skeletal muscles. Initial diagnoses rely on patients' signs, symptoms, and medical history. The challenge lies in distinguishing myasthenia from other muscular dystrophies. An important diagnostic feature is the significant improvement of symptoms after administering anticholinesterase inhibitors.
The edrophonium test is a diagnostic tool for myasthenia gravis. It involves...
Vaccines01:21

Vaccines

Vaccines are among the most effective tools in preventive medicine, designed to prepare the immune system to recognize and combat infectious agents. By introducing antigens—substances that the immune system identifies as foreign—vaccines stimulate an adaptive immune response that leads to immunological memory. This immunological memory enables the body to mount a faster and more effective response upon future exposures to the actual pathogen.Vaccines can be categorized based on the type of...
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: Jun 19, 2026

Antigenic Liposomes for Generation of Disease-specific Antibodies
10:31

Antigenic Liposomes for Generation of Disease-specific Antibodies

Published on: October 25, 2018

Vaccines as a trigger for myopathies.

H Orbach1, A Tanay

  • 1Department of Medicine B, Wolfson Medical Center, Holon, Israel. orbach@wolfson.health.gov.il

Lupus
|November 3, 2009
PubMed
Summary
This summary is machine-generated.

Vaccines are rarely linked to inflammatory myopathies, with no significant increase observed after mass vaccination campaigns. Further research is needed to explore potential environmental triggers like vaccines.

Related Experiment Videos

Last Updated: Jun 19, 2026

Antigenic Liposomes for Generation of Disease-specific Antibodies
10:31

Antigenic Liposomes for Generation of Disease-specific Antibodies

Published on: October 25, 2018

Area of Science:

  • Immunology
  • Neurology
  • Vaccinology

Background:

  • Vaccines are crucial medical advancements, eradicating diseases and improving public health.
  • Environmental factors, including vaccines, are investigated as potential triggers for inflammatory myopathies.
  • Sporadic reports link various vaccines to inflammatory myopathies, but large-scale evidence is lacking.

Purpose of the Study:

  • To investigate the association between vaccines and the development of inflammatory myopathies.
  • To review existing literature on vaccine-induced inflammatory myopathies.
  • To determine if mass vaccination campaigns correlate with increased incidence of inflammatory myopathies.

Main Methods:

  • Literature review of reported cases of vaccine-induced inflammatory myopathies.
  • Analysis of patient data for recent immunization history in inflammatory myopathy cases.
  • Examination of incidence rates of inflammatory myopathies following mass vaccination events.

Main Results:

  • While rare cases of vaccine-induced inflammatory myopathies exist (e.g., macrophagic myofasciitis), no significant increase in dermatomyositis or polymyositis incidence was observed after mass vaccinations.
  • No recent immunization was recorded in a study cohort of patients with inflammatory myopathies.
  • The 1976 mass flu vaccination did not lead to a rise in inflammatory myopathy incidence.

Conclusions:

  • Current evidence does not support a significant causal link between most vaccines and the development of inflammatory myopathies.
  • Macrophagic myofasciitis is a rare exception, potentially linked to vaccine adjuvants like aluminum hydroxide.
  • Prospective multicenter studies are necessary to definitively identify environmental factors, including vaccines, that may trigger inflammatory myopathies.