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干扰素依赖性和呼吸道病毒特异性干扰在气道上皮的双重感染中。

Interferon-Dependent and Respiratory Virus-Specific Interference in Dual Infections of Airway Epithelia.

机构信息

Department of Microbiology and Molecular Medicine, Faculty of Medicine, University of Geneva, Geneva, Switzerland.

Epithelix Sàrl, Plan les Ouates, Geneva, Switzerland.

出版信息

Sci Rep. 2020 Jun 24;10(1):10246. doi: 10.1038/s41598-020-66748-6.

Abstract

Many respiratory viruses cocirculate in the population and multiple infections are commonly reported. The clinical impact of coinfection is unclear and may vary depending on the viral couples involved. Using three-dimensional reconstituted human airway epithelia and clinical viral strains, we investigated the interaction between influenza virus (Flu), respiratory syncytial virus (RSV) and rhinovirus (RV). We showed that Flu and RSV interfere with RV replication, whereas RV does not interfere with either of these viruses. We then experimentally demonstrated that, when present, the interference is not related to a block of viral entry but rather to type I and type III interferon (IFN), the front-line antiviral defense of the respiratory mucosa. Consistent with this observation, we highlighted the differential sensitivity of each virus to IFNs, with RV being the only virus significantly inhibited by IFN-λ and the most sensitive to IFN-α. Finally, as type III IFN is of therapeutic interest due to its low proinflammatory profile, we also assessed and confirmed an inhibitory effect of IFN-λ in the context of persistent RV infections. The present work provides mechanistic clues concerning innate immunity involvement during respiratory virus interactions and confirms that IFN-λ is a promising candidate in the treatment of RV infections.

摘要

许多呼吸道病毒在人群中共同循环传播,并且经常报告多重感染。合并感染的临床影响尚不清楚,可能因涉及的病毒对而异。我们使用三维重建的人呼吸道上皮细胞和临床病毒株,研究了流感病毒(Flu)、呼吸道合胞病毒(RSV)和鼻病毒(RV)之间的相互作用。结果表明,Flu 和 RSV 会干扰 RV 的复制,而 RV 不会干扰这两种病毒。然后,我们通过实验证明,当存在时,这种干扰与病毒进入的阻断无关,而是与 I 型和 III 型干扰素(IFN)有关,这是呼吸道黏膜的一线抗病毒防御。与这一观察结果一致的是,我们强调了每种病毒对干扰素的敏感性差异,RV 是唯一一种被 IFN-λ 显著抑制且对 IFN-α 最敏感的病毒。最后,由于 III 型 IFN 因其低促炎特性而具有治疗意义,我们还评估并证实了 IFN-λ 在持续 RV 感染情况下的抑制作用。本研究提供了呼吸道病毒相互作用过程中固有免疫参与的机制线索,并证实 IFN-λ 是治疗 RV 感染的有前途的候选药物。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/182a/7314816/d91c6ab440c0/41598_2020_66748_Fig1_HTML.jpg

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