Figure 2.

In vitro antiviral effects of DPEP, LEP and LMEP against influenza A virus by different ways of drug delivery. MDCK cells (5×10⁴ cells/well) were treated with varying concentrations of DPEP (A) and LEP (B), LMEP (C) with the ways of pre-treatment host cells prior to virus infection, limited treatment to 1 hour during virus infection, pre-treatment of virus with drug or post-treatment host cells after virus infection. **P < 0.01 compared with the way of pre-treatment host cells prior to virus infection, *P < 0.05 compared with the way of pre-treatment host cells prior to virus infection; ^△△ P < 0.01 compared with the way of limited treatment to 1 hour during virus infection, ^△ P < 0.05 compared with the way of limited treatment to 1 hour during virus infection; ^▲▲ P < 0.01 compared with the way of pre-treatment of virus with drug, ^▲ P < 0.05 compared with the way of pre-treatment of virus with drug. (D) ER (%) of DPEP, LEP and LMEP against influenza A virus in the way of post-treatment host cells after virus infection. **P< 0.01 compared with LMEP, *P < 0.05 compared with LMEP; ^△△ P < 0.01 compared with LEP, ^△ P < 0.05 compared with LEP.