In vitro antiviral activity of Fisetin, Rutin and Naringenin against Dengue virus type-2
Document Type
Article
Publication Date
1-1-2011
Abstract
In vitro antiviral activities of three flavonoids; fisetin, naringenin and rutin against DENV-2 (NGC strain) were evaluated. Inhibitory effects of each compound at the different stages of DENV-2 infection were examined using foci forming unit reduction assay (FFURA) and quantitative real-time polymerase chain amplification (qRT-PCR). Fisetin, rutin and naringenin showed cytotoxic effects against Vero cells with 50 cytotoxicity (CC(50)) values of 247, > 1000, and 87 mu g/mL, respectively. Fisetin when added to Vero cells after virus adsorption inhibited DENV replication with a half maximal inhibition concentration (IC(50)) value of 55 mu g/mL and selectivity index (SI) of 4.49. The IC(50) value of fisetin was 43.12 mu g/mL with SI=5.72 when Vero cells were treated for 5 h before virus infection and continuously up to 4 days post-infection. There was no direct virucidal activity or prophylactic activity of fisetin against DENV-2. Rutin and naringenin did not inhibit DENV-2 replication in Vero cells. Naringenin however, exhibited direct virucidal activity against DENV-2 with IC(50) = 52.64 mu g/mL but the SI was <1. The present study suggests that among the flavonoids examined, only fisetin showed significant in vitro anti dengue virus replication activity.
Keywords
Infectious disease, virology, dengue, antivirals, flavonoid
Publication Title
Journal of Medicinal Plants Research
Divisions
fac_med
Volume
5
Issue
23
Additional Information
Zandi, Keivan Teoh, Boon-Teong Sam, Sing-Sin Wong, Pooi-Fong Mustafa, Mohd Rais AbuBakar, Sazaly