CAF08 adjuvant enables single dose protection against respiratory syncytial virus infection in murine newborns.

CAF08 adjuvant enables single dose protection against respiratory syncytial virus infection in murine newborns.
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CAF08佐剂能够在鼠新生儿中实现针对呼吸道合胞病毒感染的单剂量保护。

DOI:
10.1038/s41467-022-31709-2
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发表时间:
2022-08-02
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
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呼吸道合胞病毒是儿童发病和死亡的主要原因,部分原因是儿童的免疫系统不同,其特点是th1免疫诱导受损。在这里,我们展示了阳离子佐剂配方CAF08的应用,这是一种专门设计的脂质体疫苗配方,通过toll样受体7/8和c型凝集素受体Mincle的协同作用,在生命早期诱导th1免疫。我们将定量磷酸化蛋白质组学应用于人类树突状细胞,揭示了蛋白激酶C-δ在新生儿树突状细胞中增强Th1细胞因子产生的作用,并鉴定了导致抗原交叉呈递的信号事件。在小鼠体内模型中,出生时用caf08佐剂的RSV预融合抗原进行单次免疫,通过诱导抗原特异性CD8+ t细胞和Th1细胞保护新生小鼠免受RSV感染。总之,我们描述了一种儿科佐剂配方,并描述了其作用机制,为开发针对RSV和其他呼吸道病毒病原体的早期生命疫苗提供了有希望的途径。呼吸道合胞病毒是儿童感染的主要病原体之一。在这里,作者描述了一种阳离子佐剂配方,并展示了单次免疫在呼吸道合胞病毒感染的小鼠新生儿模型中的保护效果。
Respiratory syncytial virus is a leading cause of morbidity and mortality in children, due in part to their distinct immune system, characterized by impaired induction of Th 1 immunity. Here we show application of cationic adjuvant formulation CAF08, a liposomal vaccine formulation tailored to induce Th 1 immunity in early life via synergistic engagement of Toll-like Receptor 7/8 and the C-type lectin receptor Mincle. We apply quantitative phosphoproteomics to human dendritic cells and reveal a role for Protein Kinase C-δ for enhanced Th1 cytokine production in neonatal dendritic cells and identify signaling events resulting in antigen cross-presentation. In a murine in vivo model a single immunization at birth with CAF08-adjuvanted RSV pre-fusion antigen protects newborn mice from RSV infection by induction of antigen-specific CD8+ T-cells and Th1 cells. Overall, we describe a pediatric adjuvant formulation and characterize its mechanism of action providing a promising avenue for development of early life vaccines against RSV and other respiratory viral pathogens. Respiratory syncytial virus is a major pathogen with burden observed and associated with childhood infection. Here the authors characterise a cationic adjuvant formulation and show single immunisation results in protection in a murine neonate model of respiratory syncytial virus infection.
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