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#35973806   2022/08/16 To Up

Lower disease activity but higher risk of severe COVID-19 and herpes zoster in patients with systemic lupus erythematosus with pre-existing autoantibodies neutralising IFN-α.

Type-I interferons (IFNs-I) have potent antiviral effects. IFNs-I are also overproduced in patients with systemic lupus erythematosus (SLE). Autoantibodies (AAbs) neutralising IFN-α, IFN-β and/or IFN-ω subtypes are strong determinants of hypoxemic COVID-19 pneumonia, but their impact on inflammation remains unknown.
Alexis Mathian, Paul Breillat, Karim Dorgham, Paul Bastard, Caroline Charre, Raphael Lhote, Paul Quentric, Quentin Moyon, Alice-Andrée Mariaggi, Suzanne Mouries-Martin, Clara Mellot, François Anna, Julien Haroche, Fleur Cohen-Aubart, Delphine Sterlin, Noël Zahr, Adrian Gervais, Tom Le Voyer, Lucy Bizien, Quentin Amiot, Micheline Pha, Miguel Hié, Francois Chasset, Hans Yssel, Makoto Miyara, Pierre Charneau, Pascale Ghillani-Dalbin, Jean-Laurent Casanova, Flore Rozenberg, Zahir Amoura, Guy Gorochov

2173 related Products with: Lower disease activity but higher risk of severe COVID-19 and herpes zoster in patients with systemic lupus erythematosus with pre-existing autoantibodies neutralising IFN-α.

500 tests25 mg25 mg100 g48 assays 500 tests96 tests400Tests

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#35973765   2022/07/14 To Up

Profile of commercialized aphicides on the survivorship and feeding behavior of the cotton aphid, Aphis gossypii.

The cotton aphid, Aphis gossypii Glover (Hemiptera: Aphididae), is one of the most destructive agricultural pests due to photosynthate removal and horizontal transmission of plant viruses. Horizontal transmission of plant viruses by aphids occurs during distinct feeding behavioral events, such as probing for non-persistent viruses or phloem feeding for persistent viruses. We employed toxicity bioassays and electrical penetration graph (EPG) methodology to compare toxicity and quantify changes to feeding behavior and toxicity of A. gossypii after exposure to commercialized aphicides. Commercialized aphicides containing flupyradifurone, sulfoxaflor, thiamethoxam, thiamethoxam + lambda cyhalothrin, and bifenthrin induced >90% aphid mortality within 4 h of exposure. Flupyradifurone was the most acutely toxic aphicide studied with an LT of 8.9 min after exposure, which was approximately 3-fold lower than bifenthrin and thiamethoxam + lambda cyhalothrin. This was supported by our EPG results that showed a significant reduction in the proportion of aphids that continued to probe on cotton 4 h after exposure to flonicamid, thiamethoxam, flupyradifurone, bifenthrin, and thiamethoxam + lambda cyhalothrin. The commercialized aphicides containing spirotetramat, flonicamid, thiamethoxam, flupyradifurone, bifenthrin, sulfoxaflor, and pymetrozine significantly (P < 0.05) decreased the time to first probe when compared to the untreated control. Lastly, E1 (phloem salivation) and E2 (phloem ingestion) waveforms were significantly (P < 0.05) reduced for flupyradifurone, flonicamid, thiamethoxam, sulfoxaflor, and thiamethoxam. These data provide a comparative study for the development of new aphicides aiming to induce acute lethality and reduce aphid transmission of plant viruses.
Flinn M O'Hara, Jeffrey A Davis, Daniel R Swale

1926 related Products with: Profile of commercialized aphicides on the survivorship and feeding behavior of the cotton aphid, Aphis gossypii.