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Related Concept Videos

Hypersensitivity Reactions: Immune-Complex Reactions01:19

Hypersensitivity Reactions: Immune-Complex Reactions

40
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...
40
Hypersensitivity Reactions: Cytolytic Reactions01:01

Hypersensitivity Reactions: Cytolytic Reactions

43
Type II hypersensitivity involves IgG and IgM antibodies targeting cell surface antigens, leading to cell destruction. This can occur through complement activation, antibody-dependent cell-mediated cytotoxicity (ADCC), or acting as opsonins for phagocytosis. When excessive, these reactions cause significant tissue damage.Drug-induced hemolytic anemia is a common example, where drugs like penicillin or cephalosporins bind to red blood cells, forming drug-protein complexes. These complexes...
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Myocarditis I: Introduction01:21

Myocarditis I: Introduction

471
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...
471
Drug toxicity: Idiosyncratic Reactions01:16

Drug toxicity: Idiosyncratic Reactions

48
Idiosyncratic drug reactions represent abnormal chemical responses that vary significantly among individuals, ranging from extreme sensitivity to low doses to insensitivity to high doses. These reactions often occur due to the drug's covalent binding with serum proteins, forming a foreign hapten that triggers an immunotoxicological response. The variability in drug reactions has a strong pharmacogenetic foundation, with genetic differences crucial in how individuals metabolize drugs. For...
48
Allergic Drug Reactions01:27

Allergic Drug Reactions

1.5K
Allergic reactions related to drugs are hypersensitivity responses driven by the immune system and bear no connection to the drug's therapeutic action. While drugs in isolation do not trigger an immune response, they can interact with endogenous proteins to form antigens. These antigens stimulate lymphocytes to produce antibodies. IgE-type antibodies attach themselves to mast cells. Upon subsequent exposure to the same stimulus, the antigen-antibody interaction is initiated, unleashing...
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Myocarditis III: Medical Management01:14

Myocarditis III: Medical Management

246
Myocarditis: Comprehensive Medical ManagementMyocarditis, the heart muscle inflammation, requires a comprehensive medical management strategy that addresses the underlying cause, provides supportive care, manages symptoms, and reduces cardiac workload.Infections and Autoimmune CausesAdminister appropriate antimicrobial therapy when an infectious agent causes myocarditis. For instance, penicillin treats infections caused by Group A Streptococcus. In cases where autoimmune processes are...
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Related Experiment Video

Updated: Feb 22, 2026

Granulocyte-dependent Autoantibody-induced Skin Blistering
12:23

Granulocyte-dependent Autoantibody-induced Skin Blistering

Published on: October 12, 2012

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[Amiodarone-induced immune complex cutaneous vasculitis].

M Ndiaye1, B Lebrun-Vignes2, N Ortonne3

  • 1Service de dermatologie, CHU Henri-Mondor, 51, avenue du Marechal-de-Lattre-de-Tassigny, 94000 Créteil, France.

Annales De Dermatologie Et De Venereologie
|September 23, 2017
PubMed
Summary
This summary is machine-generated.

Amiodarone can cause immune complex vasculitis, a rare condition affecting the skin. Prompt drug withdrawal led to complete resolution of symptoms in a reported case.

Keywords:
AmiodaroneDrug-induced vasculitisImmune complexVascularite médicamenteuse

Related Experiment Videos

Last Updated: Feb 22, 2026

Granulocyte-dependent Autoantibody-induced Skin Blistering
12:23

Granulocyte-dependent Autoantibody-induced Skin Blistering

Published on: October 12, 2012

10.9K

Area of Science:

  • Dermatology
  • Rheumatology
  • Pharmacology

Background:

  • Cutaneous vasculitis can be drug-induced.
  • Amiodarone is an antiarrhythmic drug with potential adverse effects.
  • Immune complex vasculitis is a systemic inflammation of blood vessels.

Observation:

  • A 57-year-old presented with pruritic, necrotic skin lesions on lower limbs and back.
  • Lesions appeared within two months of starting amiodarone for supraventricular arrhythmia.
  • Skin biopsy confirmed vasculitis with IgM and C3 immune deposits.

Findings:

  • Amiodarone-induced immune complex vasculitis was diagnosed.
  • Discontinuation of amiodarone resulted in complete resolution of skin lesions.
  • No recurrence was observed during six months of follow-up.

Implications:

  • This case highlights amiodarone as a potential cause of immune complex vasculitis.
  • Early recognition and drug withdrawal are crucial for managing amiodarone-induced vasculitis.
  • Further research is needed to determine the true incidence of this rare condition.