Chloroquine is effective against influenza A virus in vitro but not in vivo.

David J. Vigerust, Jonathan Mccullers

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

BACKGROUND: Chloroquine is an inexpensive and widely available 9-aminoquinolone used in the management of malaria. Recently, in vitro assays suggest that chloroquine may have utility in the treatment of several viral infections including influenza. OBJECTIVES: We sought to test whether chloroquine is effective against influenza in vivo in relevant animal models. METHODS: The effectiveness of chloroquine at preventing or ameliorating influenza following viral challenge was assessed in established mouse and ferret disease models. RESULTS: Although active against influenza viruses in vitro, chloroquine did not prevent the weight loss associated with influenza virus infection in mice after challenge with viruses expressing an H1 or H3 hemagglutinin protein. Similarly, clinical signs and viral replication in the nose of ferrets were not altered by treatment. CONCLUSIONS: Although in vitro results were promising, chloroquine was not effective as preventive therapy in vivo in standard mouse and ferret models of influenza virus infection. This dampens enthusiasm for the potential utility of the drug for humans with influenza.

Original languageEnglish (US)
Pages (from-to)189-192
Number of pages4
JournalInfluenza and other respiratory viruses
Volume1
Issue number5-6
DOIs
StatePublished - Jan 1 2007

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Influenza A virus
Chloroquine
Ferrets
Human Influenza
Virus Diseases
Orthomyxoviridae
Hemagglutinins
Nose
Malaria
In Vitro Techniques
Weight Loss
Animal Models
Viruses
Pharmaceutical Preparations
Proteins

All Science Journal Classification (ASJC) codes

  • Epidemiology
  • Pulmonary and Respiratory Medicine
  • Public Health, Environmental and Occupational Health
  • Infectious Diseases

Cite this

Chloroquine is effective against influenza A virus in vitro but not in vivo. / Vigerust, David J.; Mccullers, Jonathan.

In: Influenza and other respiratory viruses, Vol. 1, No. 5-6, 01.01.2007, p. 189-192.

Research output: Contribution to journalArticle

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abstract = "BACKGROUND: Chloroquine is an inexpensive and widely available 9-aminoquinolone used in the management of malaria. Recently, in vitro assays suggest that chloroquine may have utility in the treatment of several viral infections including influenza. OBJECTIVES: We sought to test whether chloroquine is effective against influenza in vivo in relevant animal models. METHODS: The effectiveness of chloroquine at preventing or ameliorating influenza following viral challenge was assessed in established mouse and ferret disease models. RESULTS: Although active against influenza viruses in vitro, chloroquine did not prevent the weight loss associated with influenza virus infection in mice after challenge with viruses expressing an H1 or H3 hemagglutinin protein. Similarly, clinical signs and viral replication in the nose of ferrets were not altered by treatment. CONCLUSIONS: Although in vitro results were promising, chloroquine was not effective as preventive therapy in vivo in standard mouse and ferret models of influenza virus infection. This dampens enthusiasm for the potential utility of the drug for humans with influenza.",
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AB - BACKGROUND: Chloroquine is an inexpensive and widely available 9-aminoquinolone used in the management of malaria. Recently, in vitro assays suggest that chloroquine may have utility in the treatment of several viral infections including influenza. OBJECTIVES: We sought to test whether chloroquine is effective against influenza in vivo in relevant animal models. METHODS: The effectiveness of chloroquine at preventing or ameliorating influenza following viral challenge was assessed in established mouse and ferret disease models. RESULTS: Although active against influenza viruses in vitro, chloroquine did not prevent the weight loss associated with influenza virus infection in mice after challenge with viruses expressing an H1 or H3 hemagglutinin protein. Similarly, clinical signs and viral replication in the nose of ferrets were not altered by treatment. CONCLUSIONS: Although in vitro results were promising, chloroquine was not effective as preventive therapy in vivo in standard mouse and ferret models of influenza virus infection. This dampens enthusiasm for the potential utility of the drug for humans with influenza.

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