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J Med Virol. 2020 Mar 4. doi: 10.1002/jmv.25744. [Epub ahead of print]
Cytomegalovirus, Epstein-Barr Virus and Human Herpesvirus 6 Infections in Patients with Myalgic Еncephalomyelitis/Chronic Fatigue Syndrome.
Shikova E1,2, Reshkova V3, Kumanova А1, Raleva S1, Alexandrova D2, Capo N4, Murovska M5; European Network on ME/CFS (EUROMENE).
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Abstract
Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a disabling multisystem chronic disease. The etiology and pathogenesis of ME/CFS are unknown. Infections of cytomegalovirus (CMV), Epstein-Barr virus (EBV) and human herpesvirus-6 (HHV-6) are suspected as etiological agents for ME/CFS.
This study aims to estimate prevalence and type (active/latent) of EBV, CMV and HHV-6 infections in Bulgarian ME/CFS patients. In the study were included 58 ME/CFS patients and 50 healthy controls. Virus-specific antibodies were detected by ELISA and viral genomic sequences in PBMCs and plasma samples - by nPCR. We did not observe any significant differences in virus specific IgG and IgM positivity rates between ME/CFS patients and control group.
In ME/CFS plasma samples EBV DNA was found in 24.1%, CMV DNA - in 3.4% and HHV-6 DNA in 1.7% of samples. EBV DNA was detected in 4%, CMV and HHV-6 DNA were not found in plasma samples of controls. The frequency of viral genome detection in PBMCs of patients and controls was 74% vs 78% for CMV, 81% vs 84% for EBV, and 82.8% vs 82% for HHV-6. The difference in frequency of EBV active infection in ME/CFS and control group was statistically significant (p=0.0027). No ME/CFS and control individuals with active CMV and HHV-6 infection were observed.
In conclusion, our study using both serological and PCR-based techniques for distinguishing between active and latent infection, showed high rate of active EBV infection among ME/CFS patients indicating that at least in a subset of cases EBV is important factor for development of disease.
KEYWORDS:
CMV, EBV, HHV-6 infection; ELISA; Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS); PCR; active infection
Cytomegalovirus, Epstein-Barr Virus and Human Herpesvirus 6 Infections in Patients with Myalgic Еncephalomyelitis/Chronic Fatigue Syndrome.
Shikova E1,2, Reshkova V3, Kumanova А1, Raleva S1, Alexandrova D2, Capo N4, Murovska M5; European Network on ME/CFS (EUROMENE).
Author information
Abstract
Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a disabling multisystem chronic disease. The etiology and pathogenesis of ME/CFS are unknown. Infections of cytomegalovirus (CMV), Epstein-Barr virus (EBV) and human herpesvirus-6 (HHV-6) are suspected as etiological agents for ME/CFS.
This study aims to estimate prevalence and type (active/latent) of EBV, CMV and HHV-6 infections in Bulgarian ME/CFS patients. In the study were included 58 ME/CFS patients and 50 healthy controls. Virus-specific antibodies were detected by ELISA and viral genomic sequences in PBMCs and plasma samples - by nPCR. We did not observe any significant differences in virus specific IgG and IgM positivity rates between ME/CFS patients and control group.
In ME/CFS plasma samples EBV DNA was found in 24.1%, CMV DNA - in 3.4% and HHV-6 DNA in 1.7% of samples. EBV DNA was detected in 4%, CMV and HHV-6 DNA were not found in plasma samples of controls. The frequency of viral genome detection in PBMCs of patients and controls was 74% vs 78% for CMV, 81% vs 84% for EBV, and 82.8% vs 82% for HHV-6. The difference in frequency of EBV active infection in ME/CFS and control group was statistically significant (p=0.0027). No ME/CFS and control individuals with active CMV and HHV-6 infection were observed.
In conclusion, our study using both serological and PCR-based techniques for distinguishing between active and latent infection, showed high rate of active EBV infection among ME/CFS patients indicating that at least in a subset of cases EBV is important factor for development of disease.
KEYWORDS:
CMV, EBV, HHV-6 infection; ELISA; Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS); PCR; active infection