title: Genome scale analysis of differential mRNA expression of Helicoverpa zea insect cells infected with a H. armigera baculovirus.
abstract: Knowledge of baculovirus-insect host interactions at a genome-scale level is important for developing a number of baculovirus-based applications, but the gathering of such knowledge is hindered by the lack of genomic sequences in most insect hosts. In this study, expression kinetics of 24,206 Helicoverpa zea insect transcripts and 134 Helicoverpa armigera nucleopolyhedrovirus (HearNPV) genes at 0, 12, 24 and 48 h post-infection (hpi) were simultaneously analyzed using microarrays, which were developed from sequences obtained by deep transcriptome sequencing. Host genes in pathways important for infection such as those for energy generation, anti-viral peptides, apoptosis, detoxification, DNA polymerase activities, RNA polymerase activities, translation initiation, protein processing and cell cycle arrest were identified. Differential expression was linked to changes in the number of intracellular and extracellular viral genomes and occlusion bodies. The first comprehensive elucidation of HearNPV-H. zea expression kinetics was obtained.
authors.affiliation: Australian Institute for Bioengineering and Nanotechnology, Building 75, Corner College/Cooper Road, The University of Queensland, St. Lucia, Qld 4072, Australia. Electronic address: hoang.nguyen@uqconnect.edu.au.
authors.forename: Quan
authors.initials: Q
authors.lastname: Nguyen
authors.forename: Leslie C L
authors.initials: LC
authors.lastname: Chan
authors.forename: Lars K
authors.initials: LK
authors.lastname: Nielsen
authors.forename: Steven
authors.initials: S
authors.lastname: Reid
mesh_terms: D000818:Animals; D016367:Baculoviridae / Q000254:growth & development*; D002460:Cell Line; D054884:Host-Pathogen Interactions; D007915:Lepidoptera / Q000235:genetics* / Q000821:virology*; D046228:Microarray Analysis; D013997:Time Factors; D059467:Transcriptome
keywords: Baculovirus; Expression profile; Genome scale; HearNPV; Helicoverpa; Heliothis; Insect virus; Microarray; Virus–host interactions