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Journal of Virology, October 2006, p. 10258-10261, Vol. 80, No. 20
0022-538X/06/$08.00+0     doi:10.1128/JVI.01140-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

Isolation and Characterization of an Infectious Replication-Competent Molecular Clone of Ecotropic Porcine Endogenous Retrovirus Class C

Thomas Preuss, Nicole Fischer, Klaus Boller, and Ralf R. Tönjes*

Paul-Ehrlich-Institut, Paul-Ehrlich-Strasse 51-59, D-63225 Langen, Germany

Received 2 June 2006/ Accepted 20 July 2006

Xenotransplantation of pig organs is complicated by the existence of polytropic replication-competent porcine endogenous retroviruses (PERV) capable of infecting human cells. The potential for recombination between ecotropic PERV-C and human-tropic PERV-A and PERV-B adds another level of infectious risk. Proviral PERV-C were characterized in MAX-T cells derived from d/d haplotype miniature swine. Three proviruses were cloned from a genomic library. Clone PERV-C(1312) generated infectious particles after transfection into porcine ST-IOWA cells. Electron microscopy revealed the same morphologies of virions in MAX-T cells and in ST-IOWA cells infected with cell-free PERV-C(1312) particles, indicating that MAX-T cells harbor one functional PERV-C provirus.


* Corresponding author. Mailing address: Paul-Ehrlich-Institut, Paul-Ehrlich-Strasse 51-59, D-63225 Langen, Germany. Phone: 49 6103 774010. Fax: 49 6103 771255. E-mail: toera{at}pei.de.


Journal of Virology, October 2006, p. 10258-10261, Vol. 80, No. 20
0022-538X/06/$08.00+0     doi:10.1128/JVI.01140-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.




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