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Related Concept Videos

Hypersensitivity Reactions: Immune-Complex Reactions01:19

Hypersensitivity Reactions: Immune-Complex Reactions

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 sickness, a systemic...
Acute Inflammation III: Local and Systemic Effects01:25

Acute Inflammation III: Local and Systemic Effects

Acute inflammation produces a coordinated set of local and systemic changes that limit injury, eliminate pathogens, and initiate repair. These responses arise within minutes of infection, trauma, or chemical insult and are driven by vascular alterations and leukocyte-derived mediators. When the stimulus resolves, the reaction typically abates within days.Local EffectsAt the site of injury, arteriolar vasodilation increases blood flow, resulting in redness and warmth. Simultaneously, increased...
Immunodeficiency Diseases01:25

Immunodeficiency Diseases

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.
There are three main causes of immunodeficiency disorders...
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...
Acute Inflammation I: Inflammatory Response01:26

Acute Inflammation I: Inflammatory Response

Acute inflammation is a rapid, short-lived physiological response to tissue injury or infection, designed to eliminate harmful agents and initiate repair. This tightly regulated process typically lasts from minutes to several days and is triggered by factors such as microbial invasion, physical trauma, or chemical injury.Recognition and Mediator ReleaseThe inflammatory response begins when resident immune cells—such as mast cells, macrophages, and dendritic cells—detect damage-associated...
Acute Inflammation II: Cellular Phase01:26

Acute Inflammation II: Cellular Phase

The cellular phase of acute inflammation is a tightly orchestrated sequence of events that recruits leukocytes, primarily neutrophils, to sites of tissue injury or infection. Following the initial vascular changes, this phase ensures effective immune cell migration, activation, and function at the affected site to eliminate pathogens and initiate tissue repair.Leukocyte Recruitment CascadeLeukocyte recruitment happens in four steps: margination, adhesion, transmigration, and chemotaxis. Reduced...

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Related Experiment Video

Updated: May 25, 2026

Adoptive Immunotherapy of iNKT Cells in Glucose-6-Phosphate Isomerase (G6PI)-Induced RA Mice
08:43

Adoptive Immunotherapy of iNKT Cells in Glucose-6-Phosphate Isomerase (G6PI)-Induced RA Mice

Published on: January 31, 2020

[Immune reconstitution inflammatory syndrome].

Guillaume Breton1

  • 1Médecine interne 1, Hôpital de la Pitié-Salpêtrière, 47-83 bid de l'hôpital, 75013 Paris. guillaume.breton@psl.aphp.fr

Bulletin De L'Academie Nationale De Medecine
|February 2, 2012
PubMed
Summary
This summary is machine-generated.

Immune Reconstitution Inflammatory Syndrome (IRIS) involves severe immune responses in HIV patients starting antiretroviral therapy. Diagnosis and treatment strategies for IRIS remain challenging, impacting patient outcomes.

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Last Updated: May 25, 2026

Adoptive Immunotherapy of iNKT Cells in Glucose-6-Phosphate Isomerase (G6PI)-Induced RA Mice
08:43

Adoptive Immunotherapy of iNKT Cells in Glucose-6-Phosphate Isomerase (G6PI)-Induced RA Mice

Published on: January 31, 2020

Area of Science:

  • Immunology
  • Infectious Diseases
  • HIV/AIDS Research

Context:

  • Immune Reconstitution Inflammatory Syndrome (IRIS) is a complex condition affecting chronically HIV-infected individuals.
  • IRIS arises from an overactive immune response following the initiation of antiretroviral therapy (ART).
  • Pathogens like mycobacteria and fungi are common triggers, alongside other infections and inflammatory conditions.

Purpose:

  • To describe the heterogeneous pathological manifestations of IRIS.
  • To highlight the diagnostic challenges and undetermined optimal therapeutic strategies for IRIS.
  • To review the common causes and general outcomes of IRIS.

Summary:

  • IRIS presents as a spectrum of inflammatory conditions due to dysregulated immunity post-ART initiation in HIV patients.
  • Mycobacteria and fungi are primary culprits, but diverse pathogens and autoimmune disorders can also trigger IRIS.
  • While often favorable, outcomes can be severe, particularly with central nervous system involvement, underscoring the need for better diagnostic and treatment protocols.

Impact:

  • Improved understanding of IRIS pathogenesis and clinical presentation.
  • Highlights the need for refined diagnostic criteria and therapeutic guidelines for IRIS management.
  • Informs clinical practice regarding patient monitoring and intervention strategies for IRIS in HIV-infected populations.