Host cell gene and pathway changes associated with high baculovirus in vitro production yields
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ABSTRACT: Baculovirus-insect cell culture technology is applied for the production of veterinary and human vaccines‚ gene delivery vectors‚ and biopesticides. The current study investigated systemic cell – virus interactions under different cell culture conditions resulting in differing in virus occlusion bodies (OB)/cell yields for HearNPV infected Hzea cells. 22 microarrays were used. While mRNA levels for most genes decreased, a core set of 14 genes consistently increased in all 11 different infection conditions studied‚ suggesting a conserved up regulation pattern of these genes upon baculovirus infections. KEGG pathway analysis found strongest responses by the genes for the E3 ubiquitin-protein ligase Topors in the ubiquitin proteasome pathway‚ GAPDH in the glycolytic pathway‚ and host DNA ligase and DNA helicase in the replication process. Weighted co expression network analysis determined a module and 5 hub genes that strongly correlated to OB/cell yields. The endoplasmic reticulum functional group was particularly reduced in low producing systems. Total virus mRNA and viral genome levels had positive correlations to OB/cell yields. Virus genes were expressed in a similar temporal pattern regardless of the cell lines‚ media or infection cell densityies used. The virus Chitinase gene and Superoxide dismutase gene may be particularly important for high productivities. Overall this genome-scale expression study of different infection conditions provides insights into host insect cell responses to baculovirus infections and suggests gene expression changes that are likely important for high virus yields.
ORGANISM(S): Helicoverpa zea Helicoverpa armigera nucleopolyhedrovirus
PROVIDER: GSE63595 | GEO | 2014/11/25
SECONDARY ACCESSION(S): PRJNA268364
REPOSITORIES: GEO
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