Inhibitory Effects of Nitric oxide on the Porcine Parvovirus infection in vitro
Abstract: Inhibitory effects of nitric oxide (NO) on Porcine parvovirus (PPV) infection on porcine kidney (PK-15) cells were studied in the paper. The results showed that production of NO was effectively induced in cell cultures treated with S-nitroso-N-acetylpenicllamine (SNAP) or L-arginine and replication of PPV was significantly inhibited by the addition of them in a dose-dependent manner.SNAP produced significantly higher amounts of NO and showed higher level of inhibitory effect on PPV replicaton than L-Arg at 100 and 200 μmol/L. Higher level of inhibition of viral production was also obtained when pretreated with SNAP at 6 h and 3 h before infection than added after infection,suggesting that the anti-PPV effects of NO occurred at the initial stages of PPV infection. In addition, the anti-PPV effects of L-arginine could be blocked by N~G-nitro-L-Arginine.