Abstract
In humans, exogenous retroviruses are known to cause immunodeficiency and neurological disease. While endogenous retroviruses are firmly established pathogens in other species, the human endogenous retroviruses (HERVs) may well be considered as emerging pathogens. HERVs also exhibit complex interactions with exogenous retroviruses and herpesviruses. Two neurological disorders in particular are associated with HERVs: multiple sclerosis (MS) and schizophrenia. HERV-H/F and HERV-W are specifically activated both in the circulation and the central nervous system (CNS) in a majority of MS patients, and particularly, the envelopes (env transcription and Env proteins) appear strongly associated with disease activity. Interferon beta (IFN-β) therapy is well-established for MS. IFN-β is also known to have anti-retroviral activities toward exogenous retroviruses (HIV and HTLV-I). New reports show that IFN-β also mediate down-regulation of HERV-H/F and HERV-W in MS patients. HERV-W and HERV-K transcription (gag and pol) appears, to some extent, to be up-regulated in the circulation and the CNS of patients with schizophrenia. The expression of anti-HERV-W Gag reactive epitopes is reported to be down-regulated in the brain but up-regulated in the blood from schizophrenia patients. The pathogenic potential of HERVs certainly merits further studies.
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References
Aagaard L, Villesen P, Kjeldbjerg AL, Pedersen FS (2005) The approximately 30-million-year-old ERVPb1 envelope gene is evolutionarily conserved among hominoids and Old World monkeys. Genomics 86:685–691
Adelman MK, Marchalonis JJ (2002) Endogenous retroviruses in systemic lupus erythematosus: candidate lupus viruses. Clin Immunol 102:107–116
Andersson ML, Medstrand P, Yin H, Blomberg J (1996) Differential expression of human endogenous retroviral sequences similar to mouse mammary tumor virus in normal peripheral blood mononuclear cells. AIDS Res Hum Retroviruses 12:833–840
Antony JM, Van Marle G, Opii W, Butterfield D, Mallet F, Yong VW, Wallace JL, Deacon R, Warren K, Power C (2004) Human endogenous retrovirus glycoprotein mediated induction of redox reactants causes oligodendrocyte death and demyelination. Nat Neurosci 7:1088–1095
Antony JM, Zhu Y, Izad M, Warren KG, Vodjgani M, Mallet F, Power C (2007) Comparative expression of human endogenous retrovirus-W genes in multiple sclerosis. AIDS Res Hum Retroviruses 23:1251–1256
Armbruester V, Sauter M, Krautkraemer E, Meese E, Kleiman A, Best B, Roemer K, Mueller-Lantzsch N (2002) A novel gene from the human endogenous retrovirus K expressed in transformed cells. Clin Cancer Res 8:1800–1807
Arnaud F, Caporale M, Varela M, Biek R, Chessa B, Alberti A, Golder M, Mura M, Zhang YP, Yu L, Pereira F, Demartini JC, Leymaster K, Spencer TE, Palmarini M (2007) A paradigm for virus-host coevolution: sequential counter-adaptations between endogenous and exogenous retroviruses. PLoS Pathog 3:170
Baltimore D (1970) RNA dependent DNA polymerase in virions of RNA tumour viruses. Nature 226:1209–1211
Bangham CR (2000) HTLV-1 infections. J Clin Pathol 53:581–586
Barmak K, Harhaj E, Grant C, Alefantis T, Wigdahl B (2003) Human T cell leukemia virus type I-disease: pathways to cancer and neurodegeneration. Virology 308:1–12
Barnett MH, Prineas JW (2004) Relapsing and remitting multiple sclerosis: pathology of the newly forming lesion. Ann Neurol 55:458–468
Barre-Sinoussi F, Chermann JC, Rey F, Nugeyre MT, Chamaret S, Gruest J, Dauguet C, Axler-Blin C, Vezinet-Brun F, Rouzioux C, Rosenbaum W, Montagnier L (1983) Isolation of a T-lymphotropic retrovirus from a patient at risk for acquired immune deficiency syndrome (AIDS). Science 220:868–871
Berger T, Reindl M (2007) Multiple sclerosis: disease biomarkers as indicated by pathophysiology. J Neurol Sci 259:21–26
Bessis D, Molès JP, Basset-Séguin N, Tesniere A, Arpin C, Guilhou JJ (2004) Differential expression of a human endogenous retrovirus E transmembrane envelope glycoprotein in normal, psoriatic and atopic dermatitis human skin. Br J Dermatol 151:737–745
Blaise S, de Parseval N, Benit L, Heidmann T (2003) Genomewide screening for fusogenic human endogenous retrovirus envelopes identifies syncytin 2, a gene conserved on primate evolution. Proc Natl Acad Sci U S A 100:13013–13018
Boese A, Sauter M, Galli U, Best B, Herbst H, Mayer J, Kremmer E, Roemer K, Mueller-Lantzsch N (2000) Human endogenous retrovirus protein cORF supports cell transformation and associates with the promyelocytic leukemia zinc finger protein. Oncogene 19:4328–4336
Brady T, Lee YN, Ronen K, Malani N, Berry CC, Bieniasz PD, Bushman FD (2009) Integration target site selection by a resurrected human endogenous retrovirus. Genes Dev 23:633–642
Brosius J (1999) RNAs from all categories generate retrosequences that may be accepted as novel genes or regulatory elements. Gene 238:115–134
Brudek T, Christensen T, Hansen HJ, Bobecka J, Møller-Larsen A (2004) Simultaneous presence of endogenous retrovirus and herpes virus antigens has profound effect on cell-mediated immune responses: implications for multiple sclerosis. AIDS Res Hum Retroviruses 20:415–423
Brule F, Khatissian E, Benani A, Bodeux A, Montagnier L, Piette J, Lauret E, Ravet E (2007) Inhibition of HIV replication: a powerful antiviral strategy by IFN-beta gene delivery in CD4+ cells. Biochem Pharmacol 74:898–910
Burbelo PD, Meoli E, Leahy HP, Graham J, Yao K, Oh U, Janik JE, Mahieux R, Kashanchi F, Iadarola MJ, Jacobson S (2008) Anti-HTLV antibody profiling reveals an antibody signature for HTLV-I-associated myelopathy/tropical spastic paraparesis (HAM/TSP). Retrovirology 5:96
Callahan R, Smith GH (2000) MMTV-induced mammary tumorigenesis: gene discovery, progression to malignancy and cellular pathways. Oncogene 19:992–1001
Christensen T (2005) Association of human endogenous retroviruses with multiple sclerosis and possible interactions with herpes viruses. Rev Med Virol 15:179–211
Christensen T (2007) Human herpesviruses and MS. Int MS J 14:41–47
Christensen T, Møller-Larsen A, Haahr S (1994) A retroviral implication in multiple sclerosis? Trends Microbiol 2:332–33655
Christensen T, Jensen AW, Munch M, Haahr S, Dissing Sørensen P, Riemann H, Hansen HJ, Møller-Larsen A (1997) Characterization of retrovirus from multiple sclerosis patients. Acta Neurol Scand 95(Suppl 169):49–58
Christensen T, Dissing Sørensen P, Riemann H, Hansen HJ, Møller-Larsen (1998) Expression of the endogenous retrovirus RGH in particle form in multiple sclerosis. The Lancet 352:1033
Christensen T, Sorensen PD, Hansen HJ, Moller-Larsen A (2003) Antibodies against a human endogenous retrovirus and the preponderance of env splice variants in multiple sclerosis patients. Mult Scler 9:6–15
Christensen T, Petersen T, Thiel S, Brudek T, Ellermann-Eriksen E, Møller-Larsen A (2007) Gene-environment interactions in multiple sclerosis: innate and adaptive immune responses to human endogenous retrovirus and herpes virus antigens and the lectin complement activation pathway. J Neuroimmunol 183:175–188
Clavel F, Guetard D, Brun-Vezinet F, Chamaret S, Rey MA, Santos-Ferreire MO, Laurent AG, Dauguiet C, Katlama C, Rouzioux C, Klatzmann D, Champalimaud JL, Montagnier L (1986) Isolation of a new human retrovirus from West African patients with AIDS. Science 233:343–346
Coffin JM (1992) Structure and classification of retroviruses. In: Levy JA (ed) The Retroviridae. Plenum Press, New York, pp 19–49
Collaborative Group on AIDS Incubation and HIV Survival including the CASCADE EU Concerted Action (Concerted Action on SeroConversion to AIDS and Death in Europe) (2000) Time from HIV-1 seroconversion to AIDS and death before widespread use of highly active antiretroviral therapy: a collaborative re-analysis. Lancet 355:1131–1137
Contreras-Galindo R, Almodóvar-Camacho S, González-Ramírez S, Lorenzo E, Yamamura Y (2007) Comparative longitudinal studies of HERV-K and HIV-1 RNA titers in HIV-1-infected patients receiving successful versus unsuccessful highly active antiretroviral therapy. AIDS Res Hum Retroviruses 23:1083–1086
Ehlhardt S, Seifert M, Schneider J, Ojak A, Zang KD, Mehraein Y (2006) Human endogenous retrovirus HERV-K(HML-2) Rec expression and transcriptional activities in normal and rheumatoid arthritis synovia. J Rheumatol 2006(33):16–23
Fan H (1997) Leukemogenesis by Moloney murine leukemia virus: a multistep process. Trends Microbiol 5:74–82
Feuer G, Green PL (2005) Comparative biology of human T-cell lymphotropic virus type 1 (HTLV-1) and HTLV-2. Oncogene 24:5996–6004
Forsman A, Yun Z, Hu L, Uzhameckis D, Jern P, Blomberg J (2005) Development of broadly targeted human endogenous gammaretroviral pol-based real time PCRs Quantitation of RNA expression in human tissues. J Virol Methods 129:16–30
Fotheringham J, Jacobson S (2005) Human herpesvirus 6 and multiple sclerosis: potential mechanisms for virus-induced disease. Herpes 12:4–9
Frank O, Giehl M, Zheng C, Hehlmann R, Leib-Mösch C, Seifarth W (2005) Human endogenous retrovirus expression profiles in samples from brains of patients with schizophrenia and bipolar disorders. J Virol 79:10890–10901
Frank O, Verbeke C, Schwarz N, Mayer J, Fabarius A, Hehlmann R, Leib-Mösch C, Seifarth W (2008) Variable transcriptional activity of endogenous retroviruses in human breast cancer. J Virol 82:1808–1818
Gallo RC, Sarin PS, Gelmann EP, Robert-Guroff M, Richardson E, Kalyanaraman VS, Mann D, Sidhu GD, Stahl RE, Zolla-Pazner S, Leibowitch J, Popovic M (1983) Isolation of human T cell leukemia virus in acquired immune deficiency syndrome (AIDS). Science 220:865–867
Garrison KE, Jones RB, Meiklejohn DA, Anwar N, Ndhlovu LC, Chapman JM, Erickson AL, Agrawal A, Spotts G, Hecht FM, Rakoff-Nahoum S, Lenz J, Ostrowski MA, Nixon DF (2007) T cell responses to human endogenous retroviruses in HIV-1 infection. PLoS Pathog 3:e165
Garson JA, Tuke PW, Giraud P, Paranhos-Baccala G, Perron H (1998) Detection of virion-associated MSRV-RNA in serum of patients with multiple sclerosis. The Lancet 351:33
Gessain A (1996) Virological aspects of tropical spastic paraparesis/HTLV-I associated myelopathy and HTLV-I infection. J Neurovirol 5:299–306
Gessain A, Barin F, Vernant J-C, Gout O, Maurs L, Calender A, de Thé G (1985) Antibodies to human T-lymphotropic virus type I in patients with tropical spastic paraparesis. Lancet 2:407–410
Goedert JJ, Coté TR, Virgo P, Scoppa SM, Kingma DW, Gail MH, Jaffe ES, Biggar RJ (1998) Spectrum of AIDS-associated malignant disorders. Lancet 351:1833–1839
Grant C, Barmak K, Alefantis T, Yao J, Jacobson S, Wigdahl B (2002) Human T cell leukemia virus type I and neurologic disease: events in bone marrow, peripheral blood, and central nervous system during normal immune surveillance and neuroinflammation. J Cell Physiol 190:133–159
Hafler D (2004) Multiple sclerosis. J Clin Invest 113:788–794
Herbst H, Sauter M, Müeller-Lantzsch N (1996) Expression of human endogenous retrovirus K elements in germ cell and trophoblastic tumors. Am J Pathol 149:1727–1735
Hogancamp WE, Rodriguez M, Weinshenker BG (1997) The epidemiology of multiple sclerosis. Mayo Clin Proc 72:871–878
Hohlfeld R (1997) Biotechnological agents for the immunotherapy of multiple sclerosis. Principles, problems and perspectives. Brain 120:865–916
Inoue J, Itoh M, Akizawa T, Toyoshima H, Yoshida M (1991) HTLV-1 Rex protein accumulates unspliced RNA in the nucleus as well as in cytoplasm. Oncogene 6:1753–1757
Jacobs L, Johnson KP (1994) A brief history of the use of interferons as treatment of multiple sclerosis. Arch Neurol 51:1245–1252
Jacobson S (2002) Immunopathogenesis of human T cell lymphotropic virus type-1 associated neurologic disease. J Infect Dis 186(Suppl 2):187–192
Johnston JB, Silva C, Holden J, Warren KG, Clark AW, Power C (2001) Monocyte activation and differentiation augment human endogenous retrovirus expression: implications for inflammatory brain diseases. Ann Neurol 50:434–442
Jolivet-Reynaud C, Perron H, Ferrante P, Becquart L, Dalbon P, Mandrand B (1999) Specificities of multiple sclerosis cerebrospinal fluid and serum antibodies against mimotopes. Clin Immunol 93:283–293
Jones-Brando LV, Buthod JL, Holland LE, Yolken RH, Torrey EF (1997) Metabolites of the antipsychotic agent clozapine inhibit the replication of human immunodeficiency virus type 1. Schizophr Res 25:63–70
Kalyanaraman VS, Sarngadharan MG, Robert-Guriff M, Miyoshi I, Golde D, Gallo RC (1982) A new subtype of human T-cell leukemiavirus (HTLV-II) associated with a T cell variant of hairy cell leukemia. Science 218:571–573
Karlsson H, Bachmann S, Schröder J, McArthur J, Torrey EF, Yolken RH (2001) Retroviral RNA identified in the cerebrospinal fluids and brains of individuals with schizophrenia. Proc Natl Acad Sci USA 98:4634–4639
Kolson DL (2002) Neuropathogenesis of central nervous system HIV-1 infection. Clin Lab Med 22:703–717
Kornek B, Lassmann H (2003) Neuropathology of multiple sclerosis—new concepts. Brain Res Bull 6:321–326
Letendre SL, Woods SP, Ellis RJ, Atkinson JH, Masliah E, van den Brande G, Durelle J, Grant I, Everall I (2006) Lithium improves HIV-associated neurocognitive impairment. Aids 20:1885–1888
Levin MC, Jacobson S (1997) HTLV-I associated myelopathy/tropical spastic paraparesis (HAM/TSP): a chronic progressive neurologic disease associated with immunologically mediated damage to the central nervous system. J Neurovirol 3:126–140
Lower R, Lower J, Kurth R (1996) The viruses in all of us: characteristics and biological significance of human endogenous retrovirus sequences. Proc Natl Acad Sci USA 93:5177–5184
Magin C, Löwer R, Löwer J (1999) cORF and RcRE, the Rev/Rex and RRE/RxRE homologues of the human endogenous retrovirus family HTDV/HERV-K. J Virol 73:9496–9507
Maher J, Choudhri S, Halliday W, Power C, Nath A (1997) AIDS dementia complex with generalized myoclonus. Mov Disord 12:593–597
Mameli G, Serra C, Astone V, Castellazzi M, Poddighe L, Fainardi E, Neri W, Granieri E, Dolei A (2008) Inhibition of multiple-sclerosis-associated retrovirus as biomarker of interferon therapy. J Neurovirol 14:73–77
Mangeney M, de Parseval N, Thomas G, Heidmann T (2001) The full-length envelope of an HERV-H human endogenous retrovirus has immunosuppressive properties. J Gen Virol 82:2515–2518
Martin MA, Bryan T, Rasheed S, Khan AS (1981) Identification and cloning of endogenous retroviral sequences present in human DNA. Proc Natl Acad Sci USA 78:4892–4896
Masliah E, Nianfeng G, Achim CL, DeTeresa R, Wiley CA (1996) Patterns of neurodegeneration in HIV encephalitis. J Neuro-AIDS 1:161–173
Michaels J, Sharer LR, Epstein LG (1988) Human immunodeficiency virus type 1 (HIV-1) infection of the nervous system: a review. Immunodefic Rev 1:71–104
Mikkelsen JG, Pedersen FS (2000) Genetic reassortment and patch repair by recombination in retroviruses. J Biomed Sci 7:77–99
Minagar A, Shapshak P, Fujimura R, Ownby R, Heyes M, Eisdorfer C (2002) The role of macrophage/microglia and astrocytes in the pathogenesis of three neurologic disorders: HIV-associated dementia, Alzheimer disease, and multiple sclerosis. J Neurol Sci 202:13–23
Moles JP, Tesniere A, Guilhou JJ (2005) A new endogenous retroviral sequence is expressed in skin of patients with psoriasis. Br J Dermatol 153:83–89
Moller-Larsen A, Christensen T (2007) Exogenous and endogenous retroviruses in cancer. In: Tunely EI (ed) New research on oncogenic viruses, Chapter V. Novapublishers, New York, pp 163–187
Morgan OS, Rodgers-Johnson P, Mora C, Char J (1989) HTLV-1 and polymyositis in Jamaica. Lancet 2:1184–1187
Morozov VA, Weiss RA (1999) Two types of HTLV-1 particles are released from MT-2 cells. Virology 255:279–284
Muir A, Lever A, Moffett A (2004) Expression and functions of human endogenous retroviruses in the placenta: an update. Placenta 25(Suppl A):S16–S25
Multicenter AIDS Cohort Study, McArthur JC, Hoover DR, Bacellar H et al (1993) Dementia in AIDA patients: incidence and risk factors. Neurology 43:2245–2252
Muster T, Waltenberger A, Grassauer A, Hirschl S, Caucig P, Romirer I, Födinger D, Seppele H, Schanab O, Magin-Lachmann C, Löwer R, Jansen B, Pehamberger H, Wolff K (2003) An endogenous retrovirus derived from human melanoma cells. Cancer Res 63:8735–8741
Nagashima K, Yoshida M, Seiki M (1986) A single species of pX mRNA of human T-cell leukemia virus type I encodes trans-activator p40x and two other phosphoproteins. J Virol 60:394–399
Nakagawa K, Brusic V, McColl G, Harrison LC (1997) Direct evidence for the expression of multiple endogenous retroviruses in the synovial compartment in rheumatoid arthritis. Arthritis Rheum 40:627–638
Nakamura A, Okazaki Y, Sugimoto J, Oda T, Jinno Y (2003) Human endogenous retroviruses with transcriptional potential in the brain. J Hum Genet 48:575–581
Nielsen AA, Sørensen AB, Schmidt J, Pedersen FS (2005) Analysis of wild-type and mutant SL3-3 murine leukemia virus insertions in the c-myc promoter during lymphomagenesis reveals target site hot spots, virus-dependent patterns, and frequent error-prone gap repair. J Virol 79:67–78
Nishioka K, Maruyama I, Sato K, Kitajima I, Nakajima Y, Osame M (1989) Chronic inflammatory arthropathy associated with HTLV-I. Lancet 1:441
Nyegaard M, Severinsen JE, Als TD, Hedemand A, Straarup S, Nordentoft M, McQuillin A, Bass N, Lawrence J, Thirumalai S, Pereira AC, Kandaswamy R, Lydall GJ, Sklar P, Scolnick E, Purcell S, Curtis D, Gurling HM, Mortensen PB, Mors O, Børglum AD (2009) Support of association between BRD1 and both schizophrenia and bipolar affective disorder. Am J Med Genet B Neuropsychiatr Genet 153B:582–591
Ogasawara H, Naito T, Kaneko H, Hishikawa T, Sekigawa I, Hashimoto H, Kaneko Y, Yamamoto N, Maruyama N, Yamamoto N (2001) Quantitative analyses of messenger RNA of human endogenous retrovirus in patients with systemic lupus erythematosus. J Rheumatol 28:533–538
Oh U, Yamano Y, Mora CA, Ohayon J, Bagnato F, Buttman J, Dambrosia J, Leist T, McFarland HF, Jacobson S (2005) Interferon-β1a therapy for HTLV-I-associated myelopathy/tropical spastic paraparesis (HAM/TSP) Reduces HTLV-I-specific CD8+ T cells: analysis of HAM/TSP biomarkers. Ann Neurol 57:526–534
Onafuwa A, An W, Robson ND, Telesnitsky A (2003) Human immunodeficiency virus type 1 genetic recombination is more frequent than that of Moloney murine leukemia virus despite similar template switching rates. J Virol 77:4577–4587
Osame M, Matsumoto M, Usuku K, Izumo S, Ijichi N, Amitani H, Tara M, Igata A (1986) Chronic progressive myelopathy associated with elevated antibodies to human T-lymphotropic virus type I and adult T-cell leukemialike cells. Ann Neurol 21:117–122
Payne LN (1998) Retrovirus-induced disease in poultry. Poult Sci 77:1204–1212
Perron H, Firouzi R, Tuke P, Garson JA, Michel M, Beseme F, Bedin F, Mallet F, Marcel E, Seigneurin JM, Mandrand B et al (1997) Cell cultures and associated retroviruses in multiple sclerosis. Acta Neurol Scand 95(Suppl 169):22–31
Perron H, Lazarini F, Ruprecht K, Péchoux-Longin C, Seilhean D, Sazdovitch V, Créange A, Battail-Poirot N, Sibaï G, Santoro L, Jolivet M, Darlix JL, Rieckmann P, Arzberger T, Hauw JJ, Lassmann H (2005) Human endogenous retrovirus (HERV)-W ENV and GAG proteins: physiological expression in human brain and pathophysiological modulation in multiple sclerosis lesions. J Neurovirol 11:23–33
Perron H, Mekaoui L, Bernard C, Veas F, Stefas I, Leboyer M (2008) Endogenous retrovirus type W GAG and envelope protein antigenemia in serum of schizophrenic patients. Biol Psychiatry 64:1019–1023
Petersen T, Møller-Larsen A, Thiel S, Brudek T, Hansen TK, Christensen T (2009) Effects of interferon-beta therapy on innate and adaptive immune responses to the human endogenous retroviruses HERV-H and HERV-W, cytokine production, and the lectin complement activation pathway in multiple sclerosis. J Neuroimmunol 215:108–116
Pichon JP, Bonnaud B, Mallet F (2006) Quantitative multiplex degenerate PCR for human endogenous retrovirus expression profiling. Nature Protocols 1:2831–2838
Piotrowski PC, Duriagin S, Jagodzinski PP (2005) Expression of human endogenous retrovirus clone 4-1 may correlate with blood plasma concentration of anti-U1 RNP and anti-Sm nuclear antibodies. Clin Rheumatol 24:620–624
Poiesz BJ, Ruscetti FW, Cazdar AF, Bunn PA, Minna JD, Gallo RC (1980) Detection and isolation of type C retrovirus particles from fresh and cultured lymphocytes of a patient with cutaneous T cell lymphoma. Proc Natl Acad Sci U S A 77:7415–7419
Poiesz BJ, Dube S, Choi D, Esteban E, Ferrer J, Leon-Ponte M, de Perez GE, Glaser J, Devare SG, Vallari AS, Schochetman G (2000) Comparative performances of an HTLV-I/II EIA and other serologic and PCR assays on samples from persons at risk for HTLV-II infection. Transfusion 40:924–930
Proietti FA, Carneiro-Proietti AB, Catalan-Soares BC, Murphy EL (2005) Global epidemiology of HTLV-I infection and associated diseases. Oncogene 24:6058–6068
Reiber H, Ungefehr S, Jacobi C (1998) The intrathecal, polyspecific and oligoclonal immune response in multiple sclerosis. Mult Scler 4:111–117
Resnick L, Berger JR, Shapshak P, Tourtellotte WW (1988) Early penetration of the blood–brain barrier by HIV. Neurology 38:9–14
Reynier F, Verjat T, Turrel F, Imbert PE, Marotte H, Mougin B, Miossec P (2009) Increase in human endogenous retrovirus HERV-K (HML-2) viral load in active rheumatoid arthritis. Scand J Immunol 70:295–299
Seifarth W, Frank O, Zeilfelder U, Spiess B, Greenwood AD, Hehlmann R, Leib-Mosch C (2005) Comprehensive analysis of human endogenous retrovirus transcriptional activity in human tissues with a retrovirus-specific microarray. J Virol 79:341–352
Serra C, Sotgiu S, Mameli G, Pugliatti M, Rosati G, Dolei A (2001) Multiple sclerosis and multiple sclerosis-associated retrovirus in Sardinia. Neurol Sci 22:171–173
Sicat J, Sutkowski N, Huber BT (2005) Expression of human endogenous retrovirus HERV-K18 superantigen is elevated in juvenile rheumatoid arthritis. J Rheumatol 32:1821–1831
Soares JC, Gershon S (2000) The diagnostic boundaries of bipolar disorder. Bipolar Disord 2:1–2
Sotgiu S, Serra C, Mameli G, Pugliatti M, Rosati G, Arru G, Dolei A (2002) Multiple sclerosis-associated retrovirus and MS prognosis: an observational study. Neurology 59:1071–1073
Sotgiu S, Arru G, Mameli G, Serra C, Pugliatti M, Rosati G, Dolei A (2006) Multiple sclerosis-associated retrovirus in early multiple sclerosis: a six-year follow-up of a Sardinian cohort. Mult Scler 12:698–703
Stauffer Y, Theiler G, Sperisen P, Lebedev Y, Jongeneel CV (2004) Digital expression profiles of human endogenous retroviral families in normal and cancerous tissues. Cancer Immun 4:2–20
Stefansson H, Ophoff RA, Steinberg S, Andreassen OA, Cichon S, Rujescu D, Werge T, Pietiläinen OP, Mors O, Mortensen PB, Sigurdsson E, Gustafsson O, Nyegaard M, Tuulio-Henriksson A, Ingason A, Hansen T, Suvisaari J, Lonnqvist J, Paunio T, Børglum AD, Hartmann A, Fink-Jensen A, Nordentoft M, Hougaard D, Norgaard-Pedersen B, Böttcher Y, Olesen J, Breuer R, Möller HJ, Giegling I, Rasmussen HB, Timm S, Mattheisen M, Bitter I, Réthelyi JM, Magnusdottir BB, Sigmundsson T, Olason P, Masson G, Gulcher JR, Haraldsson M, Fossdal R, Thorgeirsson TE, Thorsteinsdottir U, Ruggeri M, Tosato S, Franke B, Strengman E, Kiemeney LA, Melle I, Djurovic S, Abramova L, Kaleda V, Sanjuan J, de Frutos R, Bramon E, Vassos E, Fraser G, Ettinger U, Picchioni M, Walker N, Toulopoulou T, Need AC, Ge D, Yoon JL, Shianna KV, Freimer NB, Cantor RM, Murray R, Kong A, Golimbet V, Carracedo A, Arango C, Costas J, Jönsson EG, Terenius L, Agartz I, Petursson H, Nöthen MM, Rietschel M, Matthews PM, Muglia P, Peltonen L, St Clair D, Goldstein DB, Stefansson K, Collier DA, Genetic Risk and Outcome in Psychosis (GROUP) (2009) Common variants conferring risk of schizophrenia. Nature 460:744–747
Sugimoto M, Nakashima H, Watanabe S, Uyama E, Tanaka F, Ando M, Araki S, Kawasaki S (1987) T-lymphocyte alveolitis in HTLV-I–associated myelopathy. Lancet 2:1220
Takenouchi N, Yao K, Jacobson S (2004) Immunopathogensis of HTLV-I associated neurologic disease: molecular, histopathologic, and immunologic approaches. Front Biosci 9:2527–2539
Temin HM (1992) Origin and general nature of retroviruses. In: Levy JA (ed) The Retroviridae. Plenum Press, New York, pp 1–18
Temin HM, Mitzutani S (1970) RNA-dependent DNA polymerase in virions of Rous Sarcoma Virus. Nature 226:1211–1213
Tristem M (2000) Identification and characterization of novel human endogenous retrovirus families by phylogenetic screening of the human genome mapping project database. Virol 74:3715–3730
Vernant JC, Buisson G, Magdeleine J, De Thore J, Jouannelle A, Neisson-Vernant C, Monplaisir N (1988) T-lymphocyte alveolitis, tropical spastic paresis, and Sjogren syndrome. Lancet 1:177
Villesen P, Aagaard L, Wiuf C, Pedersen FS (2004) Identification of endogenous retroviral reading frames in the human genome. Retrovirology 1:32
Weiss RA (2006) The discovery of endogenous retroviruses. Retrovirology 3:67
Weis S, Llenos IC, Sabunciyan S, Dulay JR, Isler L, Yolken R, Perron H (2007) Reduced expression of human endogenous retrovirus (HERV)-W GAG protein in the cingulate gyrus and hippocampus in schizophrenia, bipolar disorder, and depression. J Neural Transm 114:645–655
Yao Y, Schröder J, Nellåker C, Bottmer C, Bachmann S, Yolken RH, Karlsson H (2008) Elevated levels of human endogenous retrovirus-W transcripts in blood cells from patients with first episode schizophrenia. Genes Brain Behav 7:103–112
Yi JM, Kim HM, Kim HS (2006) Human endogenous retrovirus HERV-H family in human tissues and cancer cells: expression, identification, and phylogeny. Cancer Lett 231:228–239
Yi JM, Schuebel K, Kim HS (2007) Molecular genetic analyses of human endogenous retroviral elements belonging to the HERV-P family in primates, human tissues, and cancer cells. Genomics 89:1–9
Yolken R (2004) Viruses and schizophrenia: a focus on herpes simplex virus. Herpes 11(Suppl 2):83A–88A
Yolken RH, Karlsson H, Yee F, Johnston-Wilson NL, Torrey EF (2000) Endogenous retroviruses and schizophrenia. Brain Res Brain Res Rev 31:193–199
Acknowledgment
The author gratefully acknowledge financial support from The Augustinus Foundation, The Beckett Foundation, The Danish Multiple Sclerosis Society, Goof Fonden, Aase and Einar Danielsen’s Foundation, Fonden til Lægevidenskabens Fremme, Jascha Fonden, Direktør Jacob Madsens Fond, Torben og Alice Frimodts Fond, Wilhelm Bangs Fond, CC Klestrups Fond, Dagmar Marshalls Fond, Grosserer AV Lykfeldts Legat, Brdr Hartmanns Fond, Krista og Viggo Petersens Fond, and Carl og Ellen Hertz’ Legat.
The author declares no conflicting interests.
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Christensen, T. HERVs in Neuropathogenesis. J Neuroimmune Pharmacol 5, 326–335 (2010). https://doi.org/10.1007/s11481-010-9214-y
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DOI: https://doi.org/10.1007/s11481-010-9214-y