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Krumina A, Chapenko S, Kenina V, Mihailova M, Logina I, Rasa S, Gintere S, Viksna L, Svirskis S, Murovska M. Correction to: The role of HHV-6 and HHV-7 infections in the development of fibromyalgia. J Neurovirol 2019; 25:617. [PMID: 30680615 DOI: 10.1007/s13365-019-00725-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
There are several typographical errors in the section "Statistical Analysis" The corrected version follows.
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Affiliation(s)
- Angelika Krumina
- Department of Infectology and Dermatology, Rīga Stradiņš University, Dzirciema St. 16, Riga, LV-1007, Latvia.
| | - Svetlana Chapenko
- August Kirchenstein Institute of Microbiology and Virology, Rīga Stradiņš University, Ratsupites 5, Riga, LV-1067, Latvia
| | - Viktorija Kenina
- Department of Neurology, Riga Eastern Clinical University Hospital, Hipokrata 2, Riga, Latvia
| | - Marija Mihailova
- Department of Neurology and Neurosurgery, Rīga Stradiņš University, Dzirciema St. 16, Riga, LV-1007, Latvia
| | - Inara Logina
- Department of Neurology and Neurosurgery, Rīga Stradiņš University, Dzirciema St. 16, Riga, LV-1007, Latvia
| | - Santa Rasa
- August Kirchenstein Institute of Microbiology and Virology, Rīga Stradiņš University, Ratsupites 5, Riga, LV-1067, Latvia
| | - Sandra Gintere
- Department of Family Medicine, Medical Faculty, Rīga Stradiņš University, Dzirciema St. 16, Riga, LV-1007, Latvia
| | - Ludmila Viksna
- Department of Infectology and Dermatology, Rīga Stradiņš University, Dzirciema St. 16, Riga, LV-1007, Latvia
| | - Simons Svirskis
- August Kirchenstein Institute of Microbiology and Virology, Rīga Stradiņš University, Ratsupites 5, Riga, LV-1067, Latvia
| | - Modra Murovska
- August Kirchenstein Institute of Microbiology and Virology, Rīga Stradiņš University, Ratsupites 5, Riga, LV-1067, Latvia
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Rasa S, Nora-Krukle Z, Henning N, Eliassen E, Shikova E, Harrer T, Scheibenbogen C, Murovska M, Prusty BK. Chronic viral infections in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS). J Transl Med 2018; 16:268. [PMID: 30285773 PMCID: PMC6167797 DOI: 10.1186/s12967-018-1644-y] [Citation(s) in RCA: 170] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 09/24/2018] [Indexed: 12/15/2022] Open
Abstract
Background and main text Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a complex and controversial clinical condition without having established causative factors. Increasing numbers of cases during past decade have created awareness among patients as well as healthcare professionals. Chronic viral infection as a cause of ME/CFS has long been debated. However, lack of large studies involving well-designed patient groups and validated experimental set ups have hindered our knowledge about this disease. Moreover, recent developments regarding molecular mechanism of pathogenesis of various infectious agents cast doubts over validity of several of the past studies. Conclusions This review aims to compile all the studies done so far to investigate various viral agents that could be associated with ME/CFS. Furthermore, we suggest strategies to better design future studies on the role of viral infections in ME/CFS.
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Affiliation(s)
- Santa Rasa
- Institute of Microbiology and Virology, Rīga Stradiņš University, Riga, Latvia
| | - Zaiga Nora-Krukle
- Institute of Microbiology and Virology, Rīga Stradiņš University, Riga, Latvia
| | - Nina Henning
- Biocenter, Chair of Microbiology, University of Würzburg, Würzburg, Germany
| | - Eva Eliassen
- Biocenter, Chair of Microbiology, University of Würzburg, Würzburg, Germany
| | - Evelina Shikova
- Department of Virology, National Center of Infectious and Parasitic Diseases, Sofia, Bulgaria
| | - Thomas Harrer
- Department of Internal Medicine 3, Universitätsklinikum Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Carmen Scheibenbogen
- Institute for Medical Immunology, Charité-Universitätsmedizin Berlin, Campus Virchow, Berlin, Germany
| | - Modra Murovska
- Institute of Microbiology and Virology, Rīga Stradiņš University, Riga, Latvia
| | - Bhupesh K Prusty
- Biocenter, Chair of Microbiology, University of Würzburg, Würzburg, Germany. .,Institute for Virology and Immunobiology, Würzburg, Germany.
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Prusty BK, Gulve N, Rasa S, Murovska M, Hernandez PC, Ablashi DV. Possible chromosomal and germline integration of human herpesvirus 7. J Gen Virol 2017; 98:266-274. [PMID: 28284243 DOI: 10.1099/jgv.0.000692] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Human herpesvirus 7 (HHV-7) is a betaherpesvirus, and is phylogenetically related to both HHV-6A and HHV-6B. The presence of telomeric repeat sequences at both ends of its genome should make it equally likely to integrate into the human telomere as HHV-6. However, numerous studies have failed to detect germline integration of HHV-7, suggesting an important difference between the HHV-6A/-6B and HHV-7 genomes. In search of possible germline integrated HHV-7, we developed a sensitive and quantitative real-time PCR assay and discovered that primers designed against some parts of the HHV-7 genome can frequently miss HHV-7 positive clinical samples even though they work efficiently in cell-culture-derived HHV-7 positive materials. Using a primer pair against the U90 ORF of HHV-7, we identified a possible case of germline integration of HHV-7 with one copy of viral genome per cell in both peripheral blood cells and hair follicles. Chromosomal integration of HHV-7 in these individuals was confirmed by fluorescence in situ hybridization analysis. Germline integration of HHV-7 was further confirmed by detection of ~2.6 copies of HHV-7 in the hair follicles of one of the parents. Our results shed light on the complex nature of the HHV-7 genome in human-derived materials in comparison to cell-culture-derived materials and show the need for stringent criteria in the selection of primers for epidemiological HHV-7 studies.
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Affiliation(s)
- Bhupesh K Prusty
- Department of Microbiology, Biocenter, University of Würzburg, 97074 Würzburg, Germany
| | - Nitish Gulve
- Department of Microbiology, Biocenter, University of Würzburg, 97074 Würzburg, Germany
| | - Santa Rasa
- August Kirchenstein Institute of Microbiology and Virology, Riga Stradins University, 1069 Riga, Latvia
| | - Modra Murovska
- August Kirchenstein Institute of Microbiology and Virology, Riga Stradins University, 1069 Riga, Latvia
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Vilmane A, Rasa S, Ziemele I, Gardovska D, Murovska M, Nora-Krukle Z. Presence of human bocavirus 1 and other viral co-infections in hospitalized children with lower respiratory tract infection in Latvia. J Clin Virol 2016. [PMCID: PMC7129600 DOI: 10.1016/j.jcv.2016.08.247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Chapenko S, Roga S, Skuja S, Rasa S, Cistjakovs M, Svirskis S, Zaserska Z, Groma V, Murovska M. Detection frequency of human herpesviruses-6A, -6B, and -7 genomic sequences in central nervous system DNA samples from post-mortem individuals with unspecified encephalopathy. J Neurovirol 2016; 22:488-97. [PMID: 26727906 DOI: 10.1007/s13365-015-0417-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 11/25/2015] [Accepted: 12/09/2015] [Indexed: 12/22/2022]
Abstract
In this autopsy-based study, human herpesvirus-6 (HHV-6) and -7 (HHV-7) genomic sequence frequency, HHV-6 variants, HHV-6 load and the expression of HHV-6 antigens in brain samples from the individuals, with and without unspecified encephalopathy (controls), using nested and real-time polymerase chain reactions, restriction endonuclease, and immunohistochemical analysis were examined. GraphPad Prism 6.0 Mann-Whitney nonparametric and chi-square test and Fisher's exact test were used for statistical analysis. The encephalopathy diagnoses were shown by magnetic resonance imaging made during their lifetime and macro- and microscopically studied autopsy tissue materials. Widespread HHV-6 and/or HHV-7 positivity was detected in the brain tissue of various individuals with encephalopathy, as well as in controls (51/57, 89.4 % and 35/51, 68.6 %, respectively; p = 0.009). Significantly higher detection frequency of single HHV-6 and concurrent HHV-6 + HHV-7 DNA was found in pia mater meninges, frontal lobe, temporal lobe, and olfactory tract DNAs in individuals with encephalopathy compared to the control group. HHV-6 load and higher frequency of the viral load >10 copies/10(6) cells significantly differed in samples from individuals with and without encephalopathy. The expression of HHV-6 antigens was revealed in different neural cell types with strong predominance in the encephalopathy group. In all HHV-6-positive autopsy samples of individuals with and without encephalopathy, HHV-6B was revealed. Significantly higher detection frequency of beta-herpesvirus DNA, more often detected HHV-6 load >10 copies/10(6) cells, as well as the expression of HHV-6 antigens in different brain tissue samples from individuals with encephalopathy in comparison with control group indicate on potential involvement of these viruses in encephalopathy development.
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Affiliation(s)
- Svetlana Chapenko
- August Kirchenstein Institute of Microbiology and Virology, Riga Stradins University, Ratsupites iela 5, Riga, Latvia.
| | - Silvija Roga
- Study Department, Riga Stradins University, Riga, Latvia.,Pathology Department, Riga 1st Hospital, Riga, Latvia
| | - Sandra Skuja
- Institute of Anatomy and Anthropology, Riga Stradins University, Riga, Latvia
| | - Santa Rasa
- August Kirchenstein Institute of Microbiology and Virology, Riga Stradins University, Ratsupites iela 5, Riga, Latvia
| | - Maksims Cistjakovs
- August Kirchenstein Institute of Microbiology and Virology, Riga Stradins University, Ratsupites iela 5, Riga, Latvia
| | - Simons Svirskis
- August Kirchenstein Institute of Microbiology and Virology, Riga Stradins University, Ratsupites iela 5, Riga, Latvia
| | - Zane Zaserska
- August Kirchenstein Institute of Microbiology and Virology, Riga Stradins University, Ratsupites iela 5, Riga, Latvia
| | - Valerija Groma
- Institute of Anatomy and Anthropology, Riga Stradins University, Riga, Latvia
| | - Modra Murovska
- August Kirchenstein Institute of Microbiology and Virology, Riga Stradins University, Ratsupites iela 5, Riga, Latvia
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Vilmane A, Rasa S, Ziemele I, Gardovska D, Murovska M, Nora-Krukle Z. Presence of human bocavirus 1 in hospitalized children with lower respiratory tract infection in Latvia. J Clin Virol 2015. [DOI: 10.1016/j.jcv.2015.07.166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Krumina A, Vasiljeva G, Ivanovs A, Gintere S, Kovalchuka L, Rasa S, Chapenko S, Murovska M, Viksna L, Logina I. Assessment of Value of Fatigue Severity and Symptoms in Patients with Chronic Fatigue Syndrome/Myalgic Encephalomyelitis and Fibromyalgia. ACTA ACUST UNITED AC 2014. [DOI: 10.9734/bjmmr/2014/12225] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Rasa S, Nora-Krukle Z, Chapenko S, Krumina A, Roga S, Murovska M. No evidence of XMRV provirus sequences in patients with myalgic encephalomyelitis/chronic fatigue syndrome and individuals with unspecified encephalopathy. New Microbiol 2014; 37:17-24. [PMID: 24531167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Accepted: 11/11/2013] [Indexed: 06/03/2023]
Abstract
Xenotropic murine leukemia virus-related virus (XMRV) has been considered a possible trigger of myalgic encephalomyelitis/ chronic fatigue syndrome (ME/CFS) and could also be linked with unspecified encephalopathy. The aim of this study was to analyse the frequency of XMRV proviral sequences in peripheral blood leukocyte (PBL) DNA from 150 patients with ME/CFS and 30 apparently healthy individuals, as well as in PBL and brain tissue DNA from 61 individuals with/without unspecified encephalopathy. Targeting the XMRV proviral gag gene sequence by nested polymerase chain reaction (nPCR) with previously reported primer sets, provirus was not detected either in DNA from patients with ME/CFS and individuals with unspecified encephalopathy, or in apparently healthy individuals. Only the positive control gave the amplimer of 410 base pairs (bp) after the second round that corresponds to the expected XMRV gag gene fragment. In addition, DNA was found to be negative in nPCR assays, targeting XMRV specific env gene sequence, using previously described primer sets. Also only positive control gave the amplimer of 218 bp after the second round, corresponding to the expected XMRV env gene fragment. Using nPCR we found no evidence of XMRV infection either in apparently healthy individuals or in patients with ME/CFS and individuals with unspecified encephalopathy.
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Affiliation(s)
- Santa Rasa
- August Kirchenstein Institute of Microbiology and Virology, Riga Stradins University, Latvia
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