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Evaluation of modified vaccinia virus Ankara based recombinant SARS vaccine in ferrets

机译:基于修饰的痘苗病毒安卡拉的重组SARS疫苗在雪貂中的评估

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Severe acute respiratory syndrome (SARS) caused by a newly identified coronavirus (SARS-CoV) remains a threat to cause epidemics as evidenced by recent sporadic cases in China. In this communication, we evaluated the efficacy and safety of two SARS vaccine candidates based on the recombinant modified vaccinia Ankara (MVA) expressing SARS-CoV spike or nucleocapsid proteins in ferrets. No clinical signs were observed in all the ferrets challenged with SARS-CoV. On the other hand, vaccination did not prevent SARS-CoV infection in ferrets. In contrast, immunized ferrets (particularly those immunized with rMVA-spike) exhibited significantly stronger inflammatory responses and focal necrosis in liver tissue after SARS-CoV challenge than control animals. Thus, our data suggest that enhanced hepatitis is linked to vaccination with rMVA expressing SARS-CoV antigens.
机译:新近发现的冠状病毒(SARS-CoV)引起的严重急性呼吸道综合症(SARS)仍然是导致流行病的威胁,最近在中国散发的病例证明了这一点。在此交流中,我们基于在雪貂中表达SARS-CoV穗或核衣壳蛋白的重组修饰牛痘安卡拉(MVA),评估了两种SARS候选疫苗的功效和安全性。在用SARS-CoV攻击的所有雪貂中均未观察到临床体征。另一方面,接种疫苗并不能预防雪貂的SARS-CoV感染。相反,SARS-CoV攻击后,免疫的雪貂(特别是用rMVA-spike免疫的雪貂)在肝脏组织中表现出比对照组明显更强的炎症反应和局灶坏死。因此,我们的数据表明,增强型肝炎与表达SARS-CoV抗原的rMVA疫苗接种有关。

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