Serveur d'exploration Stress et Covid

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Inhibition of curcumin on influenza A virus infection and influenzal pneumonia via oxidative stress, TLR2/4, p38/JNK MAPK and NF-κB pathways.

Identifieur interne : 000991 ( Main/Exploration ); précédent : 000990; suivant : 000992

Inhibition of curcumin on influenza A virus infection and influenzal pneumonia via oxidative stress, TLR2/4, p38/JNK MAPK and NF-κB pathways.

Auteurs : Jianping Dai [République populaire de Chine] ; Liming Gu [République populaire de Chine] ; Yun Su [République populaire de Chine] ; Qianwen Wang [République populaire de Chine] ; Ying Zhao [République populaire de Chine] ; Xiaoxua Chen [République populaire de Chine] ; Huixiong Deng [République populaire de Chine] ; Weizhong Li [États-Unis] ; Gefei Wang [République populaire de Chine] ; Kangsheng Li [République populaire de Chine]

Source :

RBID : pubmed:29153953

Descripteurs français

English descriptors

Abstract

Oxidative stress, Nrf2-HO-1 and TLR-MAPK/NF-κB signaling pathways have been proved to be involved in influenza A virus (IAV) replication and influenzal pneumonia. In the previous studies, we have performed several high-throughput drug screenings based on the TLR pathways. In the present study, through plaque inhibition test, luciferase reporter assay, TCID50, qRT-PCR, western blotting, ELISA and siRNA assays, we investigated the effect and mechanism of action of curcumin against IAV infection in vitro and in vivo. The results showed that curcumin could directly inactivate IAV, blocked IAV adsorption and inhibited IAV proliferation. As for the underlying mechanisms, we found that curcumin could significantly inhibit IAV-induced oxidative stress, increased Nrf2, HO-1, NQO1, GSTA3 and IFN-β production, and suppressed IAV-induced activation of TLR2/4/7, Akt, p38/JNK MAPK and NF-κB pathways. Suppression of Nrf2 via siRNA significantly abolished the stimulatory effect of curcumin on HO-1, NQO1, GSTA3 and IFN-β production and meanwhile blocked the inhibitory effect of curcumin on IAV M2 production. Oxidant H2O2 and TLR2/4, p38/JNK and NF-κB agonists could significantly antagonize the anti-IAV activity of curcumin in vitro. Additionally, curcumin significantly increased the survival rate of mice, reduced lung index, inflammatory cytokines and lung IAV titer, and finally improved pulmonary histopathological changes after IAV infection. In conclusion, curcumin can directly inactivate IAV, inhibits IAV adsorption and replication; and its inhibition on IAV replication may be via activating Nrf2 signal and inhibiting IAV-induced activation of TLR2/4, p38/JNK MAPK and NF-κB pathways.

DOI: 10.1016/j.intimp.2017.11.009
PubMed: 29153953


Affiliations:


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Le document en format XML

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<div type="abstract" xml:lang="en">Oxidative stress, Nrf2-HO-1 and TLR-MAPK/NF-κB signaling pathways have been proved to be involved in influenza A virus (IAV) replication and influenzal pneumonia. In the previous studies, we have performed several high-throughput drug screenings based on the TLR pathways. In the present study, through plaque inhibition test, luciferase reporter assay, TCID
<sub>50</sub>
, qRT-PCR, western blotting, ELISA and siRNA assays, we investigated the effect and mechanism of action of curcumin against IAV infection in vitro and in vivo. The results showed that curcumin could directly inactivate IAV, blocked IAV adsorption and inhibited IAV proliferation. As for the underlying mechanisms, we found that curcumin could significantly inhibit IAV-induced oxidative stress, increased Nrf2, HO-1, NQO1, GSTA3 and IFN-β production, and suppressed IAV-induced activation of TLR2/4/7, Akt, p38/JNK MAPK and NF-κB pathways. Suppression of Nrf2 via siRNA significantly abolished the stimulatory effect of curcumin on HO-1, NQO1, GSTA3 and IFN-β production and meanwhile blocked the inhibitory effect of curcumin on IAV M2 production. Oxidant H
<sub>2</sub>
O
<sub>2</sub>
and TLR2/4, p38/JNK and NF-κB agonists could significantly antagonize the anti-IAV activity of curcumin in vitro. Additionally, curcumin significantly increased the survival rate of mice, reduced lung index, inflammatory cytokines and lung IAV titer, and finally improved pulmonary histopathological changes after IAV infection. In conclusion, curcumin can directly inactivate IAV, inhibits IAV adsorption and replication; and its inhibition on IAV replication may be via activating Nrf2 signal and inhibiting IAV-induced activation of TLR2/4, p38/JNK MAPK and NF-κB pathways.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>République populaire de Chine</li>
<li>États-Unis</li>
</country>
<region>
<li>Maryland</li>
</region>
<settlement>
<li>College Park (Maryland)</li>
</settlement>
<orgName>
<li>Université du Maryland</li>
</orgName>
</list>
<tree>
<country name="République populaire de Chine">
<noRegion>
<name sortKey="Dai, Jianping" sort="Dai, Jianping" uniqKey="Dai J" first="Jianping" last="Dai">Jianping Dai</name>
</noRegion>
<name sortKey="Chen, Xiaoxua" sort="Chen, Xiaoxua" uniqKey="Chen X" first="Xiaoxua" last="Chen">Xiaoxua Chen</name>
<name sortKey="Deng, Huixiong" sort="Deng, Huixiong" uniqKey="Deng H" first="Huixiong" last="Deng">Huixiong Deng</name>
<name sortKey="Gu, Liming" sort="Gu, Liming" uniqKey="Gu L" first="Liming" last="Gu">Liming Gu</name>
<name sortKey="Li, Kangsheng" sort="Li, Kangsheng" uniqKey="Li K" first="Kangsheng" last="Li">Kangsheng Li</name>
<name sortKey="Su, Yun" sort="Su, Yun" uniqKey="Su Y" first="Yun" last="Su">Yun Su</name>
<name sortKey="Wang, Gefei" sort="Wang, Gefei" uniqKey="Wang G" first="Gefei" last="Wang">Gefei Wang</name>
<name sortKey="Wang, Qianwen" sort="Wang, Qianwen" uniqKey="Wang Q" first="Qianwen" last="Wang">Qianwen Wang</name>
<name sortKey="Zhao, Ying" sort="Zhao, Ying" uniqKey="Zhao Y" first="Ying" last="Zhao">Ying Zhao</name>
</country>
<country name="États-Unis">
<region name="Maryland">
<name sortKey="Li, Weizhong" sort="Li, Weizhong" uniqKey="Li W" first="Weizhong" last="Li">Weizhong Li</name>
</region>
</country>
</tree>
</affiliations>
</record>

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