Related Experiment Video
Updated: Aug 10, 2026
06:29
Accurate and Simple Measurement of the Pro-inflammatory Cytokine IL-1β using a Whole Blood Stimulation Assay
Published on: March 2, 2011
Interleukin-1 production in acute viral hepatitis
1Department of Gastroenterology and Hepatology II, University of Vienna, Austria.
Archives of Disease in Childhood
|February 1, 1989
Summary
Children with acute hepatitis A and B showed reduced interleukin-1 (IL-1) production. This impaired IL-1 response, measured by lymphocyte activating factor, may explain the mild acute phase reactions observed in viral hepatitis.
Area of Science:
- Immunology
- Hepatology
- Virology
Background:
- Interleukin-1 (IL-1) plays a crucial role in immune responses and acute phase reactions.
- Viral hepatitis, including hepatitis A and B, can impact immune function.
- The specific role of IL-1 production in the pathogenesis of acute viral hepatitis is not fully understood.
Purpose of the Study:
- To investigate the in vitro production of interleukin-1 (IL-1) in children suffering from acute hepatitis A and B.
- To compare IL-1 production in patients with healthy controls.
- To explore the correlation between IL-1 production and disease severity in acute viral hepatitis.
Main Methods:
- Mononuclear cells from peripheral blood of children with acute hepatitis A (n=15) and B (n=5) were stimulated with aluminium hydroxide.
- Lymphocyte activating factor (LAF), a measure of IL-1 production, was quantified using a thymocyte proliferation assay.
- Disease severity was assessed by serum transaminases, bilirubin, alpha 1 antitrypsin, C-reactive protein, and erythrocyte sedimentation rate.
Main Results:
- Aluminium hydroxide-induced IL-1 production (LAF) was significantly lower in children with acute hepatitis A and B compared to healthy controls.
- IL-1 production was severely depressed in the first week of illness, gradually increasing but remaining subnormal for up to three weeks.
- No significant correlation was found between IL-1 production levels and clinical markers of disease severity.
Conclusions:
- Children with acute viral hepatitis A and B exhibit significantly reduced in vitro production of interleukin-1.
- The depressed IL-1 production during acute viral hepatitis may contribute to the observed moderate acute phase response.
- These findings highlight a potential immune dysregulation in acute viral hepatitis affecting IL-1 secretion.
Related Concept Videos
01:29Immune Response Against Viral Pathogens
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
01:25Hepatitis
Hepatitis is an inflammatory condition of the liver most commonly caused by hepatotropic viruses (A–E), though non-infectious causes such as alcohol and drugs also exist.Hepatitis AHepatitis A virus (HAV) is a non-enveloped RNA virus of the Picornaviridae family. It is primarily transmitted via the fecal-oral route, typically through ingestion of contaminated food or water. After ingestion, HAV enters the bloodstream through the oropharynx or intestinal epithelium and reaches the liver. The...
01:30Inhibitors of Viral Protein Synthesis
Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
01:26Acute 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...
01:25Acute 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...
01:28Viral Hepatitis I: Introduction
Viral hepatitis is an inflammatory condition of the liver caused by infection with hepatotropic viruses, most commonly hepatitis A, B, C, D, and E. Despite variations in structure and transmission, all viruses mentioned infect hepatocytes and provoke immune responses that can hinder liver function. Additionally, some non-hepatotropic viruses can also lead to hepatic inflammation.Hepatitis A VirusHepatitis A virus (HAV) is transmitted through the fecal–oral route, typically by ingestion of food...