H-Index
38
Scimago Lab
powered by Scopus
JCR
Clarivate
Analytics
call: +1.631.629.4327
Mon-Fri 10 am - 2 pm EST

Logo

MSMbanner
Medical Science Monitor Basic Research

AmJCaseRep
MedSciTechnol

eISSN: 2329-0358

Get your full text copy in PDF

Characterisation of a human cell-adapted porcine endogenous retrovirus PERV-A/C

Alexander Karlas, Markus Irgang, Jörg Votteler, Volker Specke, Mushin Ozel, Reinhard Kurth, Joachim Denner

Ann Transplant 2010; 15(2): 45-54

ID: 880940


Background:    Porcine endogenous retroviruses (PERVs) pose a potential risk for xenotransplantation using pig cells, tissues or organs. A special threat comes from viruses generated by recombination between human-tropic PERV-A and ecotropic PERV-C. Serial passages of a recombinant PERV-A/C on human 293 cells resulted in increased infectious titers and a multimerization of transcription factor binding sites in the viral long terminal repeat (LTR). In contrast to the LTR, the sequence of the env gene did not change, indicating that the LTR represents the determinant of high infectivity.
    Material/Methods:    The virus was further propagated on human cells and characterized by different methods (titration, sequencing, infection experiments, electron microscopy).
    Results:    Further propagation on human 293 cells resulted in deletions and mutations in the LTR. In contrast to low-titer viruses, the high-titer virus was infectious for cells from non-human primates including chimpanzees. Scanning electron microscopy revealed clustering of budding virions at the cell surface of infected human cells and transmission electron microscopy indicated that the virus infects them via receptor-mediated endocytosis.
    Conclusions:    After propagation of PERV on human cells without selection pressure, viruses with different LTR were generated. High titer PERV was shown to infect cells from non-human primates. The experiments performed here simulate the situation in vivo and give an extended characterization of human cell-adapted PERVs.

Keywords: Porcine Endogenous Retroviruses, PERV, replication, Immunosuppression

This paper has been published under Creative Common Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) allowing to download articles and share them with others as long as they credit the authors and the publisher, but without permission to change them in any way or use them commercially.
I agree