Fc-optimized antibodies elicit CD8 immunity to viral respiratory infection.

Fc-optimized antibodies elicit CD8 immunity to viral respiratory infection.
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DOI:
10.1038/s41586-020-2838-z
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发表时间:
2020-12
期刊:
影响因子:
64.8
通讯作者:
Ravetch JV
Ravetch JV
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Bournazos S;Corti D;Virgin HW;Ravetch JV

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针对病毒病原体的抗体是控制感染的有希望的治疗药物,其抗病毒功效已被证明需要Fab和Fc结构域的协调功能。Fc结构域与免疫系统的离散细胞上的广泛受体结合,触发病毒的清除并随后杀死受感染的细胞。在这里,我们报道了抗流感IgG单克隆抗体的Fc工程,选择性结合活化的Fcγ受体Fcγ riia,结果增强了小鼠预防或治疗致命病毒呼吸道感染的能力,增加了树突状细胞的成熟和诱导保护性CD8+ T细胞反应。这些发现强调了IgG抗体在选择性激活树突状细胞和T细胞途径时诱导对病毒感染的保护性适应性免疫的能力,这对开发具有改善抗病毒功效的治疗性抗体具有重要意义。一种增强与树突状细胞上激活Fc受体结合的抗体Fc结构域变体促进了保护性CD8 T细胞反应的诱导。
Antibodies against viral pathogens represent promising therapeutic agents for the control of infection, and their antiviral efficacy has been shown to require the coordinated function of both the Fab and Fc domains. The Fc domain engages a wide spectrum of receptors on discrete cells of the immune system to trigger the clearance of viruses and subsequent killing of infected cells. Here we report that Fc engineering of anti-influenza IgG monoclonal antibodies for selective binding to the activating Fcγ receptor FcγRIIa results in enhanced ability to prevent or treat lethal viral respiratory infection in mice, with increased maturation of dendritic cells and the induction of protective CD8+ T cell responses. These findings highlight the capacity for IgG antibodies to induce protective adaptive immunity to viral infection when they selectively activate a dendritic cell and T cell pathway, with important implications for the development of therapeutic antibodies with improved antiviral efficacy against viral respiratory pathogens. An antibody Fc domain variant with enhanced binding to an activating Fc receptor on dendritic cells promotes the induction of a protective CD8 T cell response.
DOI: 10.1084/jem.20151267
发表时间: 2015-08-24
期刊: The Journal of experimental medicine
影响因子: --
作者:
Bournazos S;DiLillo DJ;Ravetch JV
通讯作者: Ravetch JV
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期刊: Science (New York, N.Y.)
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