Treatment of porcine kidney (PK-15) cells with either interferon-gamma (IFN-γ) or endosomal- lysosomal system acidification inhibitors increases replication of porcine circovirus type 2 (PCV2). In the present study, the effect of a combination of these treatments on the number of infected cells and virus yield was tested. The number of PCV2 (Stoon-1010)-infected PK-15 cells increased in cells treated with ammonium chloride (445 ± 39% increase), IFN-γ (446 ± 8%), ammonium chloride + IFN-γ (1721 ± 283%), chloroquine diphosphate (1037 ± 121%), chloroquine diphosphate + IFN-γ (2199 ± 255%), monensin (950 ± 178%) and monensin + IFN-γ (1948 ± 60%). Combined IFN-γ and endosomal-lysosomal system acidification inhibitors increased PCV2 yield by up to 50 times compared to untreated PK-15. This augmented virus replication in PK-15 cells may be helpful in the production of PCV2 vaccines.
Archives of Virology – Springer Journals
Published: Feb 1, 2008
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