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Table 3 Anti-HSV-1 activities of isolated compounds (4-7) at different stages of viral infection

From: Chemical composition and anti-herpes simplex virus type 1 (HSV-1) activity of extracts from Cornus canadensis

Compounds

EC50 for each mode of antiviral activity (μM)a

Protectionb

Absorptionc

Replicationd

Directe

4

> 25

11 ± 3

> 25

7 ± 4

5

> 25

12 ± 4

> 25

10 ± 2

6

> 25

5.0 ± 0.2

> 25

2.6 ± 0.1

7

> 25

11 ± 3

> 25

7 ± 1

  1. aEffective concentration inhibiting 50% of lysis plaques induced by HSV-1 at different modes of antiviral activity. Acyclovir was used as positive control with 100% inhibition of lysis plaques at a concentration of 3 μM
  2. bVero cells were pretreated with compounds prior infection
  3. cVero cells and viruses were incubated together with compounds during absorption period
  4. dCompounds were added after absorption and during the replication period
  5. eViruses were incubated directly with compounds prior infection of Vero cells