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Multiple Sclerosis l: Introduction01:19

Multiple Sclerosis l: Introduction

Multiple sclerosis is a chronic autoimmune disease of the central nervous system (CNS) that affects the brain, spinal cord, and optic nerves. It is an inflammatory demyelinating disorder and a leading cause of neurological disability in young adults.EpidemiologyMS commonly begins between 20 and 40 years of age and is twice as common in women. Its exact cause remains unclear, but genetic susceptibility contributes, with higher risk in first-degree relatives and identical twins. A greater...
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Antigens Involved in Adaptive Immunity

An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.

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Related Experiment Video

Updated: May 30, 2026

Isolation and Quantification of Epstein-Barr Virus from the P3HR1 Cell Line
09:14

Isolation and Quantification of Epstein-Barr Virus from the P3HR1 Cell Line

Published on: September 28, 2022

Epstein-Barr virus and multiple sclerosis: interaction with HLA.

E Sundqvist1, P Sundström, M Lindén

  • 1Neuroimmunology Unit, Department of Clinical Neuroscience, Center for Molecular Medicine L8:05, Karolinska Institutet, Stockholm, Sweden. Sundqvist@ki.se

Genes and Immunity
|July 22, 2011
PubMed
Summary
This summary is machine-generated.

Epstein-Barr virus (EBV) infection and specific HLA genotypes interact to increase multiple sclerosis (MS) risk. Reactivity to EBV fragments, particularly EBNA1 385-420, combined with HLA types, significantly elevates MS susceptibility.

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Published on: May 27, 2011

Area of Science:

  • Immunogenetics
  • Neuroimmunology
  • Virology

Background:

  • Multiple sclerosis (MS) risk is influenced by Epstein-Barr virus (EBV) infection, infectious mononucleosis (IM), and HLA-A and DRB1 genotypes.
  • The interplay between EBV immunity and host genetic factors in MS pathogenesis requires further elucidation.

Purpose of the Study:

  • To investigate potential interactions between antibodies against Epstein-Barr virus nuclear antigen 1 (EBNA1) or its fragments and specific HLA genotypes (DRB1*15, A*02) in relation to MS risk.
  • To quantify the attributable proportion due to interaction (AP) for these combined risk factors.

Main Methods:

  • Case-control study including newly diagnosed MS cases and matched controls.
  • Analysis of antibodies against EBNA1 and EBNA1 fragments (specifically IgG).
  • Statistical analysis of interactions using attributable proportion (AP) on the additive scale.

Main Results:

  • Infectious mononucleosis (IM) and raised EBNA1 IgG levels were associated with increased MS risk (OR=1.89 and OR=1.74, respectively).
  • Antibodies against EBNA1 fragments were associated with MS risk, with EBNA1 fragment 385-420 IgG showing a stronger association (OR=3.60).
  • EBNA1 fragment 385-420 IgG interacted significantly with DRB1*15 (AP=0.60) and absence of A*02 (AP=0.39), indicating a combined effect on MS risk.

Conclusions:

  • The interaction between HLA class I and II genotypes and immune response to specific EBV epitopes suggests a significant role in MS development.
  • Host genetic factors, specifically HLA types, may influence MS risk by modulating the immune control of EBV infection.