Safety, immunogencity, and efficacy of a cold-adapted A/Ann Arbor/6/60 (H2N2) vaccine in mice and ferrets.

Safety, immunogencity, and efficacy of a cold-adapted A/Ann Arbor/6/60 (H2N2) vaccine in mice and ferrets.
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DOI:
10.1016/j.virol.2009.12.003
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发表时间:
2010-03-01
期刊:
影响因子:
3.7
通讯作者:
Subbarao, Kanta
Subbarao, Kanta
中科院分区:
医学3区
文献类型:
--
作者:
Chen, Grace L.;Lamirande, Elaine W.;Jin, Hong;Kemble, George;Subbarao, Kanta

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我们研究了冷适应型A/Ann Arbor/6/60 (AAca) (H2N2)病毒在小鼠和雪貂体内的衰减、免疫原性和有效性,以评估其在H2流感大流行中的应用。AAca病毒在小鼠和雪貂呼吸道的复制受到限制。在小鼠中,2剂疫苗可使血凝抑制(HAI)滴度提高4倍,并在致死性同源野生型病毒攻击后完全抑制病毒复制。在雪貂中,单次接种疫苗可使血毒抗体滴度提高4倍,并对上呼吸道同源野生型病毒的攻击提供完全保护。在小鼠和雪貂的呼吸道中,AAca病毒对异源H2病毒的攻击具有显著的保护作用。AAca疫苗对小鼠和雪貂的同源和异源攻击具有安全性、免疫原性和有效性,支持该疫苗在临床试验中的评价。
We studied the attenuation, immunogenicity and efficacy of the cold-adapted A/Ann Arbor/6/60 (AAca) (H2N2) virus in mice and ferrets to evaluate its' use in the event of an H2 influenza pandemic. The AAca virus was restricted in replication in the respiratory tract of mice and ferrets. In mice, 2 doses of vaccine elicited a > 4-fold rise in hemagglutination-inhibition (HAI) titer and resulted in complete inhibition of viral replication following lethal homologous wild-type virus challenge. In ferrets, a single dose of the vaccine elicited a > 4-fold rise in HAI titer and conferred complete protection against homologous wild-type virus challenge in the upper respiratory tract. In both mice and ferrets, the AAca virus provided significant protection from challenge with heterologous H2 virus challenge in the respiratory tract. The AAca vaccine is safe, immunogenic and efficacious against homologous and heterologous challenge in mice and ferrets, supporting the evaluation of this vaccine in clinical trials.
迁徙鸟类中的流感和洲际病毒交换有限的证据。
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