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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
Summary
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.