A single sublingual dose of an adenovirus-based vaccine protects against lethal Ebola challenge in mice and guinea pigs.

A single sublingual dose of an adenovirus-based vaccine protects against lethal Ebola challenge in mice and guinea pigs.
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DOI:
10.1021/mp200392g
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发表时间:
2012-01-01
影响因子:
4.9
通讯作者:
Croyle MA
Croyle MA
中科院分区:
医学2区
文献类型:
--
作者:
Choi JH;Schafer SC;Zhang L;Kobinger GP;Juelich T;Freiberg AN;Croyle MA

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舌下(SL)给药是一种绕过肠道直接进入循环系统的非侵入性免疫方法,使用基于腺病毒(Ad5)的埃博拉疫苗进行了评估。小鼠和豚鼠通过肌内(IM)、鼻腔(IN)、口服(PO)和SL途径进行免疫。 SL免疫在粘膜中引发强烈的转基因表达并将CD11c(+)抗原呈递细胞吸引至粘膜。 SL 剂量的 1 × 108 感染性颗粒在初始小鼠的脾脏、支气管肺泡灌洗液、肠系膜淋巴结和下颌下淋巴结 (SMLN) 中诱导埃博拉扎伊尔糖蛋白 (ZGP) 特异性 IFN-γ+ T 细胞,其方式与给予相同剂量的 IN 类似。离体 CFSE 和体内细胞毒性 T 淋巴细胞 (CTL) 测定证实,SL 免疫可在脾脏和 SMLN 中引发大量效应记忆 CD8+ T 细胞和强烈的 CTL 反应。 SL 免疫诱导显着的 ZGP 特异性 Th1 和 Th2 型反应,不受预先存在的免疫 (PEI) 的影响,保护小鼠和豚鼠免受致命攻击。 SL 递送比 IM 注射保护更多的 PEI 至 Ad5 小鼠。 SL 免疫还降低了幼鼠和 PEI 小鼠的全身抗 Ad5 T 和 B 细胞反应,表明二次免疫对这两个群体都非常有效。
Sublingual (SL) delivery, a non-invasive immunization method that bypasses the intestinal tract for direct entry into the circulation, was evaluated with an adenovirus (Ad5)-based vaccine for Ebola. Mice and Guinea pigs were immunized via the intramuscular (IM), nasal (IN), oral (PO) and SL routes. SL immunization elicited strong transgene expression in and attracted CD11c(+) antigen presenting cells to the mucosa. A SL dose of 1 × 108 infectious particles induced Ebola Zaire glycoprotein (ZGP)-specific IFN-γ+ T cells in spleen, bronchoalveolar lavage, mesenteric lymph nodes and submandibular lymph nodes (SMLN) of naïve mice in a manner similar to the same dose given IN. Ex vivo CFSE and in vivo cytotoxic T lymphocyte (CTL) assays confirmed that SL immunization elicits a notable population of effector memory CD8+ T cells and strong CTL responses in spleen and SMLN. SL immunization induced significant ZGP-specific Th1 and Th2 type responses unaffected by pre-existing immunity (PEI) that protected mice and Guinea pigs from lethal challenge. SL delivery protected more mice with PEI to Ad5 than IM injection. SL immunization also reduced systemic anti-Ad5 T and B cell responses in naïve mice and those with PEI, suggesting that secondary immunizations could be highly effective for both populations.
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