Andrographolide ameliorates OVA-induced lung injury in mice by suppressing ROS-mediated NF-κB signaling and NLRP3 inflammasome activation
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摘要
Andrographolide, a natural diterpenoid, found in Andrographis paniculata, has been reported to have anti-inflammatory property. In the present study, we aimed to examine the effect and possible mechanism of Andrographolide on asthma. Asthma was induced by OVA intraperitoneal injection followed by repetitive OVA challenge for 4 weeks. OVA-inducedairway inflammatory cell recruitment and lung histological alterations were significantly ameliorated by Andrographolide. The protein levels of pro-inflammatory cytokines in bron-choalveolar fluid(BALF) and serum were reduced by Andrographolide administration as well as the mRNA levels in lung tissue. Mechanically, Andrographolide markedly suppressed the activation of nuclear factor-κB(NF-κB) and NLRP3 inflammasome both in vivo and vitro thus decreased the level of inflammation cytokines including TNF-α and IL-1β. Finally, ROS scavenging was responsible for Andrographolide's inactivation of NF-κB and NLRP3 inflammasome signaling. In summary, these results suggest that Andrographolide ameliorated OVA-induced asthma in mice through inhibition of NF-κB and NLRP3-mediated inflammatory response. Our study suggests Andrographolide may represent a new therapeutic approach for treating asthma.
Andrographolide, a natural diterpenoid, found in Andrographis paniculata, has been reported to have anti-inflammatory property. In the present study, we aimed to examine the effect and possible mechanism of Andrographolide on asthma. Asthma was induced by OVA intraperitoneal injection followed by repetitive OVA challenge for 4 weeks. OVA-inducedairway inflammatory cell recruitment and lung histological alterations were significantly ameliorated by Andrographolide. The protein levels of pro-inflammatory cytokines in bron-choalveolar fluid(BALF) and serum were reduced by Andrographolide administration as well as the mRNA levels in lung tissue. Mechanically, Andrographolide markedly suppressed the activation of nuclear factor-κB(NF-κB) and NLRP3 inflammasome both in vivo and vitro thus decreased the level of inflammation cytokines including TNF-α and IL-1β. Finally, ROS scavenging was responsible for Andrographolide's inactivation of NF-κB and NLRP3 inflammasome signaling. In summary, these results suggest that Andrographolide ameliorated OVA-induced asthma in mice through inhibition of NF-κB and NLRP3-mediated inflammatory response. Our study suggests Andrographolide may represent a new therapeutic approach for treating asthma.
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