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Yeast-generated virus-like particles as antigens for detection of human bocavirus 1–4 specific antibodies in human serum

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Abstract

Human bocaviruses (HBoV) are non-enveloped, single-stranded DNA viruses, classified into the genus Bocavirus in the family Parvoviridae. Self-assembled virus-like particles (VLPs) composed of the major capsid protein VP2 of HBoV1–4 and mosaic VLPs composed of both VP2 and VP1 capsid proteins of HBoV1 were generated in yeast Saccharomyces cerevisiae and used to detect HBoV-specific IgG in human serum. Recombinant HBoV VLPs were similar to native HBoV particles in size and morphology. The prevalence of HBoV infection in a group of Lithuanian patients with clinical symptoms of respiratory tract infection was studied using purified yeast-generated VLPs as antigens in a competitive enzyme immunoassay (EIA). After depletion of cross-reactive antibodies, the seroprevalence of HBoV1 was 44.2 % and the seroprevalence of HBoV2–4 was 35.7 %. Mosaic VLPs consisting of HBoV1 VP1 and VP2 proteins showed a stronger reactivity with HBoV1 IgG-positive human serum specimens, and two equivocal serum specimens were reinterpreted as positive. Thus, mosaic VLPs offer a more sensitive tool for HBoV1 serology than currently available serodiagnostics tests based on VP2 VLPs. In conclusion, yeast S. cerevisiae represents an efficient expression system for generating recombinant HBoV1–4 VLPs of diagnostic relevance.

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Authors and Affiliations

  1. Institute of Biotechnology, Vilnius University, V. A. Graičiūno 8, 02241, Vilnius, Lithuania

    Paulius Lukas Tamošiūnas, Rasa Petraitytė-Burneikienė, Aistė Bulavaitė, Kornelija Marcinkevičiūtė, Karolis Simutis, Rita Lasickienė, Aurelija Žvirblienė & Kęstutis Sasnauskas

  2. Clinic of Children’s Diseases, Faculty of Medicine, Vilnius University, Vilnius, Lithuania

    Regina Firantienė & Regina Ėmužytė

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  1. Paulius Lukas Tamošiūnas
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Correspondence to Paulius Lukas Tamošiūnas.

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This study was funded by the Lithuanian Science Council Grant No. MIP-060/2011.

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All applicable international, national and institutional guidelines for the care and use of animals were followed. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.

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Tamošiūnas, P.L., Petraitytė-Burneikienė, R., Bulavaitė, A. et al. Yeast-generated virus-like particles as antigens for detection of human bocavirus 1–4 specific antibodies in human serum. Appl Microbiol Biotechnol 100, 4935–4946 (2016). https://doi.org/10.1007/s00253-016-7336-8

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