Volume 87, Issue 7 p. 1096-1103
Research Article

Chloroquine enhances replication of influenza A virus A/WSN/33 (H1N1) in dose-, time-, and MOI-dependent manners in human lung epithelial cells A549

Liqi Wu

Liqi Wu

Department of Microbiology and Immunology, Shantou University Medical College, Shantou, China

The Key Immunopathology Laboratory of Guangdong Province, Shantou University Medical College, Shantou, China

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Jianping Dai

Jianping Dai

Department of Microbiology and Immunology, Shantou University Medical College, Shantou, China

The Key Immunopathology Laboratory of Guangdong Province, Shantou University Medical College, Shantou, China

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Xiangfeng Zhao

Xiangfeng Zhao

Department of Microbiology and Immunology, Shantou University Medical College, Shantou, China

The Key Immunopathology Laboratory of Guangdong Province, Shantou University Medical College, Shantou, China

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Youying Chen

Youying Chen

Department of Microbiology and Immunology, Shantou University Medical College, Shantou, China

The Key Immunopathology Laboratory of Guangdong Province, Shantou University Medical College, Shantou, China

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Gefei Wang

Gefei Wang

Department of Microbiology and Immunology, Shantou University Medical College, Shantou, China

The Key Immunopathology Laboratory of Guangdong Province, Shantou University Medical College, Shantou, China

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Kangsheng Li

Corresponding Author

Kangsheng Li

Department of Microbiology and Immunology, Shantou University Medical College, Shantou, China

The Key Immunopathology Laboratory of Guangdong Province, Shantou University Medical College, Shantou, China

Correspondence to: Kangsheng Li, MD, PhD, Department of Microbiology and Immunology, Shantou University Medical College, 22 Xinling Road, Shantou 515041, China.

E-mail: [email protected]

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First published: 25 February 2015
Citations: 12
None of the authors has any conflict of interest to declare.

Abstract

Anti-malaria drug, chloroquine, has been reported to be effective against influenza A virus (IAV) in vitro and used in in-vivo experiments and clinical trial for prevention or treatment of influenza. In this study, it has been shown by immunofluorescence, hemagglutination, and plaque assays that chloroquine enhanced A/WSN/33 (H1N1) replication with pronounced cytopathic effect in dose-, time-, and MOI-dependent manners in human lung epithelial cells A549. Time-of-addition assay showed that inhibitory effect on virus replication by chloroquine pre-treatment was indistinctive, and virus productions were enhanced when the drug was applied after viral adsorption. The effectiveness of chloroquine as an anti-influenza drug is questioned, and caution in its use is recommended. J. Med. Virol. 87:1096–1103, 2015. © 2015 Wiley Periodicals, Inc.

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