Author: Keyaerts, Els; Vijgen, Leen; Maes, Piet; Neyts, Johan; Ranst, Marc Van
Title: In vitro inhibition of severe acute respiratory syndrome coronavirus by chloroquine Cord-id: 5lzzobl3 Document date: 2004_10_8
ID: 5lzzobl3
Snippet: We report on chloroquine, a 4-amino-quinoline, as an effective inhibitor of the replication of the severe acute respiratory syndrome coronavirus (SARS-CoV) in vitro. Chloroquine is a clinically approved drug effective against malaria. We tested chloroquine phosphate for its antiviral potential against SARS-CoV-induced cytopathicity in Vero E6 cell culture. Results indicate that the IC(50) of chloroquine for antiviral activity (8.8 ± 1.2 μM) was significantly lower than its cytostatic activity;
Document: We report on chloroquine, a 4-amino-quinoline, as an effective inhibitor of the replication of the severe acute respiratory syndrome coronavirus (SARS-CoV) in vitro. Chloroquine is a clinically approved drug effective against malaria. We tested chloroquine phosphate for its antiviral potential against SARS-CoV-induced cytopathicity in Vero E6 cell culture. Results indicate that the IC(50) of chloroquine for antiviral activity (8.8 ± 1.2 μM) was significantly lower than its cytostatic activity; CC(50) (261.3 ± 14.5 μM), yielding a selectivity index of 30. The IC(50) of chloroquine for inhibition of SARS-CoV in vitro approximates the plasma concentrations of chloroquine reached during treatment of acute malaria. Addition of chloroquine to infected cultures could be delayed for up to 5 h postinfection, without an important drop in antiviral activity. Chloroquine, an old antimalarial drug, may be considered for immediate use in the prevention and treatment of SARS-CoV infections.
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