Cappariloside A shows antiviral and better anti-inflammatory effects against influenza virus via regulating host IFN signaling, in vitro and vivo

    loading  Checking for direct PDF access through Ovid



This study aimed to evaluate the efficacy and mechanisms of Cappariloside A, a chemically synthesized compound, against virus and inflammation induced by influenza virus.

Main methods:

The inhibitory activity of Cappariloside A against influenza virus was determined by plaque assay and cytopathic effect inhibition assay. Quantitative real-time PCR, enzyme-linked immunosorbent assay and Bio-Plex methods were used to quantify cytokine and chemokine expression profiles. Effects of Cappariloside A were also evaluated in a mouse model of influenza virus infection.

Key findings:

We successfully synthesized Cappariloside A, which could inhibit replication of a variety of viruses, including influenza viruses H1N1 and H3N2, PIV3 and ADV in vitro. Cappariloside A could also inhibit progeny virus replication at concentrations of 2 and 1 mg/mL. Simultaneously, it significantly reduced the expressions of IL-6, IP-10, MIG and RANTES/CCL-5 stimulated by A/PR/8/34 (H1N1) at a range of doses, even 0.5 mg/mL. Similar anti-inflammatory activity was detected in cells induced by avian influenza virus H9N2 or lipopolysaccharide. In addition, Cappariloside A clearly inhibited inflammatory response induced by mouse lung-adapted influenza strain PR8/H1N1. Furthermore, Cappariloside A strongly inhibited phosphorylated STAT1 levels and IFN-β and IL-29 expressions induced by PR8/H1N1. Cappariloside A also inhibited IP-10 and CCL-5/RANTES expressions induced by exogenous human recombinant IFN-β.


Cappariloside A not only shows broad-spectrum antiviral efficacy, but more effectively impairs the upregulations of pro-inflammatory factors in host cells induced by influenza virus. The potential antiviral mechanism of Cappariloside A is through inhibiting the activation of the host IFN signaling pathway.

Related Topics

    loading  Loading Related Articles