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Extended observations on the association of HHV-6 and multiple sclerosis
R Berti1, S S Soldan, N Akhyani
1Viral Immunology Section, Neuroimmunology Branch, National Institutes of Health, Bethesda, Maryland, MD 20892, USA.
Abstract:
Throughout the years, a long list of viruses has been associated with multiple sclerosis (MS), however no virus to date has been definitively identified as the etiologic agent of this disease. Recently, human herpesvirus 6 (HHV-6), a newly described herpesvirus, has been suggested to play a role in MS based on: immunohistochemical demonstration of HHV-6 in MS plaques, increased antibodies response to HHV-6 in sera and CSF of MS patients, and the demonstration of HHV-6 DNA in the serum of MS patients but not in normal individuals. To extend these observations we have focused our research in multiple directions. We have increased the number of MS patients tested for HHV-6 serum DNA providing confirmation of our previous study. Additionally we have investigated a possible correlation between HHV-6 viremia and clinical activity. Finally to provide insight into the pathogenesis of this disease, we have begun to characterize the cellular immune response of MS patients to HHV-6. Collectively these studies will help to define the role that HHV-6 may play in the pathogenesis of MS.
Insights
Human herpesvirus 6 (HHV-6) DNA was detected in multiple sclerosis (MS) patients, suggesting a potential role for this virus in MS pathogenesis. Further research is exploring the link between HHV-6 viremia and disease activity.
Area of Science:
- Virology
- Neuroimmunology
- Infectious Diseases
Background:
- Multiple sclerosis (MS) is a chronic neurological disease with an unknown etiology.
- Numerous viruses have been implicated in MS, but none definitively identified as the cause.
- Human herpesvirus 6 (HHV-6) has recently emerged as a potential factor in MS.
Purpose of the Study:
- To confirm the presence of HHV-6 DNA in MS patients.
- To investigate the correlation between HHV-6 viremia and MS clinical activity.
- To characterize the cellular immune response to HHV-6 in MS patients.
Main Methods:
- Increased testing of MS patients for HHV-6 serum DNA.
- Analysis of the relationship between HHV-6 viremia and clinical disease markers.
- Evaluation of the cellular immune response to HHV-6.
Main Results:
- Confirmation of HHV-6 DNA presence in the serum of MS patients.
- Investigation into the potential link between HHV-6 viremia and disease progression.
- Initiation of studies on the cellular immune response to HHV-6.
Conclusions:
- The presence of HHV-6 DNA in MS patients warrants further investigation.
- Understanding the immune response to HHV-6 may elucidate its role in MS pathogenesis.
- These studies aim to define HHV-6's contribution to the development of MS.