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• W2015303007 abstract "• Hemin inhibits PRRSV infection in MARC-145 cells. • Hemin could inhibit PRRSV replication independent of iron in MARC-145 cells. • PRRSV infection blocks the expression of heme oxygenase-1. • Hemin inhibits PRRSV replication dependent on heme oxygenase-1 in MARC-145 cells. • The antiviral mechanism of HO-1 is not related to decreased levels of ROS. Current vaccines against porcine reproductive and respiratory syndrome virus (PRRSV) have failed to provide sustainable disease control, and development of new antiviral strategies is of great importance. The present study investigated the mechanism of the antiviral effect of hemin during PRRSV infection in MARC-145 cells. Hemin, a commercial preparation of heme, is used as an iron donor or heme oxygenase 1 (HO-1) inducer, and has been shown to provide antiviral activity in many studies. In the current study, the anti-PRRSV activity of hemin was identified through suppressing PRRSV propagation. The 50% inhibitory concentration (IC 50 ) of hemin antiviral activity was estimated to be 32 μM, and the 50% cytotoxic concentration (CC 50 ) of hemin was found to be higher than 125 μM. Further study showed that the antiviral activity of hemin is independent of iron. In addition, after treatment with Protoporphyrin IX zinc (II) (ZnPP) or Sn (IV) Protoporphyrin IX dichloride (SnPP), inhibitors of HO-1, the inhibition of viral replication by hemin was partially reversed. Additionally, it was confirmed that hemin and N-acetyl cysteine were able to significantly reduce reactive oxygen species (ROS) in MARC-145 cells infected with virus. N-acetyl-L-cysteine (NAC), however, did not produce a reduction in viral load or promote expression of HO-1. Taken together, these data indicate that the effect of hemin on the inhibition of PRRSV propagation via HO-1 induction, as well as the antiviral mechanism of HO-1, is not dependent on decreased levels of ROS. In conclusion, these data demonstrate that hemin had antiviral activity against PRRSV and may serve as a useful antiviral agent inhibiting PRRSV replication." @default.
• W2015303007 created "2016-06-24" @default.
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• W2015303007 date "2014-05-01" @default.
• W2015303007 modified "2023-09-22" @default.
• W2015303007 title "Inhibition of replication of porcine reproductive and respiratory syndrome virus by hemin is highly dependent on heme oxygenase-1, but independent of iron in MARC-145 cells" @default.
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• W2015303007 doi "https://doi.org/10.1016/j.antiviral.2014.02.010" @default.
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