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Related Concept Videos

Immune Response Against Viral Pathogens01:29

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When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
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Viral Recombination00:57

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Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
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Likelihood ratios of quantitative laboratory results in medical diagnosis: The application of Bézier curves in ROC analysis.

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Multiple sclerosis: an example of pathogenic viral interaction?

Walter Fierz1

  • 1labormedizinisches zentrum Dr Risch, Landstr. 157, 9494, Schaan, Fürstentum, Liechtenstein. walter.fierz@risch.ch.

Virology Journal
|March 1, 2017
PubMed
Summary
This summary is machine-generated.

Human herpesvirus 6A (HHV-6A) and Epstein-Barr virus (EBV) may interact to cause Multiple Sclerosis (MS). This viral synergy could trigger brain inflammation and autoimmune responses in susceptible individuals.

Keywords:
EBNA-2EBVHERV-K18HHV-6ALMP1MHC2TAMultiple SclerosisRBPJ-kappaSyncytin-1

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Area of Science:

  • Neurovirology
  • Immunology
  • Genetics

Background:

  • Multiple Sclerosis (MS) is a chronic inflammatory disease of the central nervous system.
  • The etiology of MS remains incompletely understood, with viral infections being investigated as potential triggers.
  • Human herpesvirus 6A (HHV-6A) and Epstein-Barr virus (EBV) are common viruses with proposed roles in MS pathogenesis.

Purpose of the Study:

  • To propose a hypothesis for the pathogenic role of HHV-6A and EBV interaction in Multiple Sclerosis.
  • To explore molecular and genetic evidence linking these viruses to MS pathology.
  • To suggest research directions for validating the proposed viral synergy in MS.

Main Methods:

  • Formulation of a hypothesis based on existing molecular and genetic evidence.
  • Postulation of mechanisms involving viral activation, B-cell transformation, and T-cell immune responses.
  • Identification of potential roles for human endogenous retroviruses (HERVs) in the pathogenic process.

Main Results:

  • Evidence suggests HHV-6A infection and EBV activation in the MS brain contribute to intrathecal B-cell transformation.
  • A T-cell response against EBV-infected cells is proposed as a basis for inflammatory lesions.
  • Both viruses may induce expression of the HERV-K18 superantigen, potentially leading to autoimmune phenomena.

Conclusions:

  • The interaction between HHV-6A and EBV presents a plausible pathogenic mechanism for Multiple Sclerosis.
  • Virally induced immune responses, including those involving HERVs, may drive MS lesion formation and autoimmunity.
  • Further research is recommended to investigate this viral synergy epidemiologically, genetically, and through viral expression analysis in the brain.