PMID- 25835531 OWN - NLM STAT- MEDLINE DCOM- 20151217 LR - 20191210 IS - 1999-4915 (Electronic) IS - 1999-4915 (Linking) VI - 7 IP - 4 DP - 2015 Mar 31 TI - Development of a recombination system for the generation of occlusion positive genetically modified Anticarsia gemmatalis multiple nucleopolyhedrovirus. PG - 1599-612 LID - 10.3390/v7041599 [doi] AB - Anticarsia gemmatalis is an important pest in legume crops in South America and it has been successfully controlled using Anticarsia gemmatalis Multiple Nucleopolyhedrovirus (AgMNPV) in subtropical climate zones. Nevertheless, in temperate climates its speed of kill is too slow. Taking this into account, genetic modification of AgMNPV could lead to improvements of its biopesticidal properties. Here we report the generation of a two-component system that allows the production of recombinant AgMNPV. This system is based on a parental AgMNPV in which the polyhedrin gene (polh) was replaced by a bacterial beta-galactosidase (lacZ) gene flanked by two target sites for the homing endonuclease I-PpoI. Co-transfection of insect cells with linearized (I-PpoI-digested) parental genome and a transfer vector allowed the restitution of polh and the expression of a heterologous gene upon homologous recombination, with a low background of non-recombinant AgMNPV. The system was validated by constructing a recombinant occlusion-positive (polh+) AgMNPV expressing the green fluorescent protein gene (gfp). This recombinant virus infected larvae normally per os and led to the expression of GFP in cell culture as well as in A. gemmatalis larvae. These results demonstrate that the system is an efficient method for the generation of recombinant AgMNPV expressing heterologous genes, which can be used for manifold purposes, including biotechnological and pharmaceutical applications and the production of orally infectious recombinants with improved biopesticidal properties. FAU - Haase, Santiago AU - Haase S AD - Instituto de Biotecnologia y Biologia Molecular (IBBM), Departamento de Ciencias Biologicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, 1900-La Plata, Argentina. shaase@biol.unlp.edu.ar. FAU - McCarthy, Christina B AU - McCarthy CB AD - Instituto de Biotecnologia y Biologia Molecular (IBBM), Departamento de Ciencias Biologicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, 1900-La Plata, Argentina. cmccarthy@conicet.gov.ar. AD - Centro Regional de Estudios Genomicos (CREG), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 1900-La Platae, Argentina. cmccarthy@conicet.gov.ar. FAU - Ferrelli, M Leticia AU - Ferrelli ML AD - Instituto de Biotecnologia y Biologia Molecular (IBBM), Departamento de Ciencias Biologicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, 1900-La Plata, Argentina. lferrelli@biol.unlp.edu.ar. FAU - Pidre, Matias L AU - Pidre ML AD - Instituto de Biotecnologia y Biologia Molecular (IBBM), Departamento de Ciencias Biologicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, 1900-La Plata, Argentina. mlpidre@biol.unlp.edu.ar. FAU - Sciocco-Cap, Alicia AU - Sciocco-Cap A AD - Instituto de Microbiologia y Zoologia Agricola (IMYZA), Instituto Nacional de Tecnologia Agropecuaria (INTA), 1712-Castelar, Argentina. sciocco.alicia@inta.gob.ar. FAU - Romanowski, Victor AU - Romanowski V AD - Instituto de Biotecnologia y Biologia Molecular (IBBM), Departamento de Ciencias Biologicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, 1900-La Plata, Argentina. victor@biol.unlp.edu.ar. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150331 PL - Switzerland TA - Viruses JT - Viruses JID - 101509722 RN - 147336-22-9 (Green Fluorescent Proteins) SB - IM MH - Animals MH - Entomology/*methods MH - Genes, Reporter MH - Green Fluorescent Proteins/analysis/genetics MH - Larva/virology MH - Lepidoptera/*virology MH - Molecular Biology/*methods MH - Nucleopolyhedroviruses/*genetics/*growth & development MH - *Recombination, Genetic MH - South America MH - Virology/*methods PMC - PMC4411667 EDAT- 2015/04/04 06:00 MHDA- 2015/12/19 06:00 PMCR- 2015/04/01 CRDT- 2015/04/04 06:00 PHST- 2015/01/14 00:00 [received] PHST- 2015/03/12 00:00 [revised] PHST- 2015/03/26 00:00 [accepted] PHST- 2015/04/04 06:00 [entrez] PHST- 2015/04/04 06:00 [pubmed] PHST- 2015/12/19 06:00 [medline] PHST- 2015/04/01 00:00 [pmc-release] AID - v7041599 [pii] AID - viruses-07-01599 [pii] AID - 10.3390/v7041599 [doi] PST - epublish SO - Viruses. 2015 Mar 31;7(4):1599-612. doi: 10.3390/v7041599.