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Thujaplicin–copper chelates inhibit replication of human influenza viruses

Identifieur interne : 001A44 ( Main/Exploration ); précédent : 001A43; suivant : 001A45

Thujaplicin–copper chelates inhibit replication of human influenza viruses

Auteurs : Daisei Miyamoto [Japon] ; Yuki Kusagaya [Japon] ; Naoko Endo [Japon] ; Ayako Sometani [Japon] ; Seiji Takeo [Japon] ; Takashi Suzuki [Japon] ; Yaeno Arima [Japon] ; Katsuyuki Nakajima [États-Unis] ; Yasuo Suzuki [Japon]

Source :

RBID : ISTEX:735996364087205C257469F4F7F05747D82AF949

Descripteurs français

English descriptors

Abstract

Abstract: The effects of α-, β- and γ-thujaplicins and six of their metal chelates on human influenza virus-induced apoptosis in Madin–Darby canine kidney (MDCK) cells were examined by DNA fragmentation and flow cytometry. Among the compounds tested, thujaplicin–copper chelates inhibited apoptosis induced in the infected MDCK cells with influenza A/PR/8/34(H1N1), A/Shingapol/1/57(H2N2), A/Aichi/2/68(H3N2) and B/Lee/40 viruses, at concentrations of more than 5 μM. These results indicate that the copper chelates inhibit influenza virus-induced apoptosis and that the inhibitory effects may be independent of influenza virus subtype or types. Furthermore, the copper chelates also inhibited the release of the viruses from the infected MDCK cells during apoptosis. The anti-apoptotic effects of the copper chelates may occur 2–4 h postinfection, suggesting that the copper chelates affect MDCK cells directly in the early stage of influenza virus-induced apoptosis. In this study, we demonstrated that thujaplicin–copper chelates inhibit influenza virus-induced apoptosis of MDCK cells and also inhibit virus replication and release from the infected cells.

Url:
DOI: 10.1016/S0166-3542(98)00034-5


Affiliations:


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Le document en format XML

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<term>Pharmacognosy</term>
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<term>Tropolone (pharmacology)</term>
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<term>Chem</term>
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<term>Copper sulfate</term>
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<term>Hela cells</term>
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<term>Zinc ions</term>
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<front>
<div type="abstract" xml:lang="en">Abstract: The effects of α-, β- and γ-thujaplicins and six of their metal chelates on human influenza virus-induced apoptosis in Madin–Darby canine kidney (MDCK) cells were examined by DNA fragmentation and flow cytometry. Among the compounds tested, thujaplicin–copper chelates inhibited apoptosis induced in the infected MDCK cells with influenza A/PR/8/34(H1N1), A/Shingapol/1/57(H2N2), A/Aichi/2/68(H3N2) and B/Lee/40 viruses, at concentrations of more than 5 μM. These results indicate that the copper chelates inhibit influenza virus-induced apoptosis and that the inhibitory effects may be independent of influenza virus subtype or types. Furthermore, the copper chelates also inhibited the release of the viruses from the infected MDCK cells during apoptosis. The anti-apoptotic effects of the copper chelates may occur 2–4 h postinfection, suggesting that the copper chelates affect MDCK cells directly in the early stage of influenza virus-induced apoptosis. In this study, we demonstrated that thujaplicin–copper chelates inhibit influenza virus-induced apoptosis of MDCK cells and also inhibit virus replication and release from the infected cells.</div>
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