PERV inactivation is necessary to guarantee absence of pig‐to‐patient PERVs transmission in xenotransplantation

wileyonlinelibrary.com/journal/xen | 1 of 4 https://doi.org/10.1111/xen.12366 © 2017 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd. In this issue of xenotransplantation, Scobie et al. commented on our recent production of PERVinactivated pigs using CRISPRcas9.1 Based on the data of our studies, we believe there is an unneglectable risk of pigtohuman PERV transmission. We would like to provide some remarks and share our opinions about this issue here. In a previous commentary on xenotransplantation, Joachim Denner has warned that PERV is the main microbiological risk for Received: 30 October 2017 | Accepted: 30 October 2017 DOI: 10.1111/xen.12366

[1]  Yong Wang,et al.  Inactivation of porcine endogenous retrovirus in pigs using CRISPR-Cas9 , 2017, Science.

[2]  Barry H. Smith,et al.  A comprehensive microbiological safety approach for agarose encapsulated porcine islets intended for clinical trials , 2016, Xenotransplantation.

[3]  G. Church,et al.  Supplementary Materials for Genome-wide inactivation of porcine endogenous retroviruses ( PERVs ) , 2015 .

[4]  J. Denner Elimination of porcine endogenous retroviruses from pig cells , 2015, Xenotransplantation.

[5]  J. Denner Porcine endogenous retrovirus infection of human peripheral blood mononuclear cells , 2015, Xenotransplantation.

[6]  J. Denner,et al.  Microbiological safety of the first clinical pig islet xenotransplantation trial in New Zealand , 2014, Xenotransplantation.

[7]  H. Niemann,et al.  Long‐term effects of PERV‐specific RNA interference in transgenic pigs , 2012, Xenotransplantation.

[8]  C. Ehrhardt,et al.  High level expression of the anti-retroviral protein APOBEC3G is induced by influenza A virus but does not confer antiviral activity , 2009, Retrovirology.

[9]  J. Denner Recombinant porcine endogenous retroviruses (PERV-A/C): a new risk for xenotransplantation? , 2008, Archives of Virology.

[10]  R. LaRue,et al.  The Restriction of Zoonotic PERV Transmission by Human APOBEC3G , 2007, PloS one.

[11]  Ulrich Pfeffer,et al.  Identification of Genes Selectively Regulated by IFNs in Endothelial Cells1 , 2007, The Journal of Immunology.

[12]  R. Kurth,et al.  Genetic alterations of the long terminal repeat of an ecotropic porcine endogenous retrovirus during passage in human cells. , 2003, Virology.

[13]  J. Denner,et al.  Productive infection of human primary cells and cell lines with porcine endogenous retroviruses. , 2001, Virology.

[14]  Y. Takeuchi,et al.  Productive infection of primary human endothelial cells by pig endogenous retrovirus (PERV) , 2000, Xenotransplantation.

[15]  M. VanBrocklin,et al.  Extended Analysis of the In Vitro Tropism of Porcine Endogenous Retrovirus , 2000, Journal of Virology.