Susceptibility of swine cells and domestic pigs to SARS-CoV-2.

Susceptibility of swine cells and domestic pigs to SARS-CoV-2.
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DOI:
10.1080/22221751.2020.1831405
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发表时间:
2020-12
影响因子:
13.2
通讯作者:
Richt JA
Richt JA
中科院分区:
医学2区
文献类型:
--
作者:
Meekins DA;Morozov I;Trujillo JD;Gaudreault NN;Bold D;Carossino M;Artiaga BL;Indran SV;Kwon T;Balaraman V;Madden DW;Feldmann H;Henningson J;Ma W;Balasuriya UBR;Richt JA

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SARS-CoV-2的出现导致了一场持续的全球大流行,造成了严重的发病率、死亡率和经济后果。由于可能存在种间传播,不同动物物种对SARS-CoV-2的易感性值得关注,并且需要临床前动物模型来制定有效的对策。在目前的研究中,我们确定了SARS-CoV-2 (i)在猪细胞系中复制的能力,(ii)通过实验性口服/鼻内/气管内接种在家猪中建立感染的能力,以及(iii)传播给共同饲养的naïve哨点猪的能力。SARS-CoV-2能够在两种不同的猪细胞系中复制并产生细胞病变效应。有趣的是,接种了sars - cov -2的猪没有表现出临床症状、病毒复制或sars - cov -2特异性抗体反应的证据。此外,所有哨点猪均未显示出SARS-CoV-2感染标志物。这些数据表明,尽管不同的猪细胞系允许SARS-CoV-2,但5周龄的猪不容易通过口服/鼻内/气管内感染。因此,猪不太可能是SARS-CoV-2的重要携带者,也不是研究SARS-CoV-2发病机制或各自疫苗或治疗方法疗效的合适临床前动物模型。
The emergence of SARS-CoV-2 has resulted in an ongoing global pandemic with significant morbidity, mortality, and economic consequences. The susceptibility of different animal species to SARS-CoV-2 is of concern due to the potential for interspecies transmission, and the requirement for pre-clinical animal models to develop effective countermeasures. In the current study, we determined the ability of SARS-CoV-2 to (i) replicate in porcine cell lines, (ii) establish infection in domestic pigs via experimental oral/intranasal/intratracheal inoculation, and (iii) transmit to co-housed naïve sentinel pigs. SARS-CoV-2 was able to replicate in two different porcine cell lines with cytopathic effects. Interestingly, none of the SARS-CoV-2-inoculated pigs showed evidence of clinical signs, viral replication or SARS-CoV-2-specific antibody responses. Moreover, none of the sentinel pigs displayed markers of SARS-CoV-2 infection. These data indicate that although different porcine cell lines are permissive to SARS-CoV-2, five-week old pigs are not susceptible to infection via oral/intranasal/intratracheal challenge. Pigs are therefore unlikely to be significant carriers of SARS-CoV-2 and are not a suitable pre-clinical animal model to study SARS-CoV-2 pathogenesis or efficacy of respective vaccines or therapeutics.
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