PMID- 26068081 OWN - NLM STAT- MEDLINE DCOM- 20160620 LR - 20181113 IS - 2045-2322 (Electronic) IS - 2045-2322 (Linking) VI - 5 DP - 2015 Jun 12 TI - Generation of a variety of stable Influenza A reporter viruses by genetic engineering of the NS gene segment. PG - 11346 LID - 10.1038/srep11346 [doi] LID - 11346 AB - Influenza A viruses (IAV) pose a constant threat to the human population and therefore a better understanding of their fundamental biology and identification of novel therapeutics is of upmost importance. Various reporter-encoding IAV were generated to achieve these goals, however, one recurring difficulty was the genetic instability especially of larger reporter genes. We employed the viral NS segment coding for the non-structural protein 1 (NS1) and nuclear export protein (NEP) for stable expression of diverse reporter proteins. This was achieved by converting the NS segment into a single open reading frame (ORF) coding for NS1, the respective reporter and NEP. To allow expression of individual proteins, the reporter genes were flanked by two porcine Teschovirus-1 2A peptide (PTV-1 2A)-coding sequences. The resulting viruses encoding luciferases, fluorescent proteins or a Cre recombinase are characterized by a high genetic stability in vitro and in mice and can be readily employed for antiviral compound screenings, visualization of infected cells or cells that survived acute infection. FAU - Reuther, Peter AU - Reuther P AD - 1] Institute for Virology, University of Freiburg, 79104 Freiburg, Germany [2] Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany. FAU - Gopfert, Kristina AU - Gopfert K AD - Institute for Virology, University of Freiburg, 79104 Freiburg, Germany. FAU - Dudek, Alexandra H AU - Dudek AH AD - 1] Institute for Virology, University of Freiburg, 79104 Freiburg, Germany [2] Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany [3]. FAU - Heiner, Monika AU - Heiner M FAU - Herold, Susanne AU - Herold S FAU - Schwemmle, Martin AU - Schwemmle M AD - Institute for Virology, University of Freiburg, 79104 Freiburg, Germany. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150612 PL - England TA - Sci Rep JT - Scientific reports JID - 101563288 RN - 0 (INS1 protein, influenza virus) RN - 0 (Viral Nonstructural Proteins) RN - EC 1.13.12.- (Luciferases) SB - IM MH - Animals MH - Dogs MH - *Genes, Reporter MH - HEK293 Cells MH - Humans MH - *Influenza A virus/genetics/metabolism MH - *Luciferases/biosynthesis/genetics MH - Madin Darby Canine Kidney Cells MH - Mice MH - *Viral Nonstructural Proteins/genetics/metabolism PMC - PMC4464305 EDAT- 2015/06/13 06:00 MHDA- 2016/06/21 06:00 PMCR- 2015/06/12 CRDT- 2015/06/13 06:00 PHST- 2015/01/21 00:00 [received] PHST- 2015/05/21 00:00 [accepted] PHST- 2015/06/13 06:00 [entrez] PHST- 2015/06/13 06:00 [pubmed] PHST- 2016/06/21 06:00 [medline] PHST- 2015/06/12 00:00 [pmc-release] AID - srep11346 [pii] AID - 10.1038/srep11346 [doi] PST - epublish SO - Sci Rep. 2015 Jun 12;5:11346. doi: 10.1038/srep11346.