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No evidence for xenotropic murine leukemia-related virus infection in Sweden using internally controlled multiepitope suspension array serology
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2012 (Engelska)Ingår i: Clinical and Vaccine Immunology, ISSN 1556-6811, E-ISSN 1556-679X, Vol. 19, nr 9, s. 1399-1410Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Many syndromes have a large number of differential diagnoses, a situation which calls for multiplex diagnostic systems. Myalgic encephalomyelitis (ME), also named chronic fatigue syndrome (CFS), is a common disease of unknown etiology. A mouse retrovirus, xenotropic murine leukemia-related virus (XMRV), was found in ME/CFS patients and blood donors, but this was not corroborated. However, the paucity of serological investigations on XMRV in humans prompted us to develop a serological assay which cover many aspects of XMRV antigenicity. It is a novel suspension array method, using a multiplex IgG assay with nine recombinant proteins from the env and gag genes of XMRV and 38 peptides based on known epitopes of vertebrate gamma-retroviruses. IgG antibodies were sought in 520 blood donors and 85 ME/CFS patients and in positive-and negative-control sera from animals. We found no differences in seroreactivity between blood donors and ME/CFS patients for any of the antigens. This did not support an association between ME/CFS and XMRV infection. The multiplex serological system had several advantages: (i) biotinylated protein G allowed us to run both human and animal sera, which is essential because of a lack of XMRV-positive humans; (ii) a novel quality control was a pan-peptide positive-control rabbit serum; and (iii) synthetic XMRV Gag peptides with degenerate positions covering most of the variation of murine leukemia-like viruses did not give higher background than nondegenerate analogs. The principle may be used for creation of variant tolerant peptide serologies. Thus, our system allows rational large-scale serological assays with built-in quality control.

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American Society for Microbiology , 2012. Vol. 19, nr 9, s. 1399-1410
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URN: urn:nbn:se:du-11332DOI: 10.1128/CVI.00391-12ISI: 000308503400009OAI: oai:DiVA.org:du-11332DiVA, id: diva2:573059
Tillgänglig från: 2012-11-29 Skapad: 2012-11-28 Senast uppdaterad: 2017-12-07Bibliografiskt granskad

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