Formulation of the prefusion RSV F protein with a Th1/Th2-balanced adjuvant provides complete protection without Th2-skewed immunity in RSV-experienced young mice.

Formulation of the prefusion RSV F protein with a Th1/Th2-balanced adjuvant provides complete protection without Th2-skewed immunity in RSV-experienced young mice.
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融合的RSV F蛋白与Th1/Th2平衡佐剂的配方在经历过RSV的幼鼠中提供了完全保护,而没有Th2扭曲的免疫。

DOI:
10.1016/j.vaccine.2020.08.023
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发表时间:
2020-09-22
期刊:
影响因子:
5.5
通讯作者:
Empey KM
Empey KM
中科院分区:
医学3区
文献类型:
--
作者:
Kosanovich JL;Eichinger KM;Lipp MA;Yondola MA;Perkins TN;Empey KM

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呼吸道合胞病毒(RSV)是婴儿下呼吸道感染的主要原因,大多数感染发生在一岁以内。儿童需要多次接触RSV才能产生类似成人的免疫反应。虽然成人呼吸道合胞病毒免疫与较不严重的疾病相关,但通过自然感染诱导的保护是短暂的。因此,对经历过RSV的幼儿接种疫苗可能会加速免疫,并提供长期保护,防止RSV再感染。然而,不同的th偏倚疫苗方案在多大程度上影响了经历过rsv的幼儿的预先存在的体液和细胞免疫尚不清楚。为了解决这个问题,婴儿BALB/c小鼠被RSV感染,随后用由th2倾斜(Alum)或Th1/ th2平衡(Advax-SM)佐剂配制的预融合RSV F (PreF)抗原进行免疫。这些研究表明,这两种佐剂都增强了中和抗体并保护了RSV再感染,但Advax-SM佐剂阻止了用PreF/明矾免疫RSV的年轻小鼠中观察到的th2倾斜免疫。
Respiratory syncytial virus (RSV) is a leading cause of lower respiratory tract infections among infants with most infections occurring in the first year of life. Multiple RSV exposures are required for children to mount adult-like immune responses. Although adult RSV immunity is associated with less severe disease, the protection induced through natural infection is short-lived. Therefore, vaccination of RSV-experienced young children may accelerate immunity and provide long-term protection from RSV reinfection. However, the extent to which different Th-biased vaccine regimens influence pre-existing humoral and cellular immunity in RSV-experienced young children is unknown. To address this question, infant BALB/c mice were RSV-infected and subsequently immunized with the prefusion RSV F (PreF) antigen formulated with either a Th2-skewing (Alum) or Th1/Th2-balanced (Advax-SM) adjuvant. These studies show that both adjuvants boosted neutralizing antibody and protected from RSV reinfection, but Advax-SM adjuvant prevented the Th2-skewed immunity observed in RSV-experienced young mice immunized with PreF/Alum.
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