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Correlation between HHV-6 reactivation and multiple sclerosis disease activity

Svetlana Chapenko1, Andrejs Millers, Zaiga Nora

  • 1August Kirchenstein Institute of Microbiology and Virology, University of Latvia, Riga, Latvia. modra@latnet.lv

Journal of Medical Virology
|November 19, 2002
PubMed

Insights

Human herpesvirus 6 (HHV-6) infection is linked to multiple sclerosis (MS). HHV-6 reactivation correlates with MS disease activity and exacerbations, potentially via IL-12 modulation.

Area of Science:

  • Virology
  • Neuroimmunology
  • Infectious Diseases

Background:

  • Multiple Sclerosis (MS) is a chronic neurological disorder with complex etiology.
  • Human Herpesvirus 6 (HHV-6) is a common virus with potential immunomodulatory effects.

Purpose of the Study:

  • To investigate the association between HHV-6 infection and MS.
  • To explore the relationship between HHV-6 reactivation and MS disease activity.

Main Methods:

  • Assessed HHV-6 genomic sequences, plasma viremia (nPCR), viral mRNA (RT-PCR), and antiviral antibodies (IFA) in MS patients.
  • Correlated viral findings with clinical disease activity, brain MRI, and serum IL-12 levels (ELISA).

Main Results:

  • Significantly higher prevalence of HHV-6 infection in MS patients compared to controls.
  • HHV-6 reactivation detected during active MS disease, associated with MRI-confirmed lesions.
  • Elevated serum IL-12 concentrations in MS patients with active HHV-6 infection.

Conclusions:

  • HHV-6 infection is associated with MS.
  • HHV-6 reactivation correlates with and may drive MS disease activity and exacerbations.
  • HHV-6 reactivation might contribute to MS pathogenesis through IL-12 pathway modulation.

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