Infection with the SARS-CoV-2 B.1.351 variant is lethal in aged BALB/c mice.

Infection with the SARS-CoV-2 B.1.351 variant is lethal in aged BALB/c mice.
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DOI:
10.1038/s41598-022-08104-4
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发表时间:
2022-03-09
期刊:
影响因子:
4.6
通讯作者:
Kohara M
Kohara M
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Yasui F;Matsumoto Y;Yamamoto N;Sanada T;Honda T;Munakata T;Itoh Y;Kohara M

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易受严重急性呼吸综合征冠状病毒 2 (SARS-CoV-2) 感染的动物模型可以有效评估疫苗和治疗方法的功效。在这项研究中,我们证明,感染 SARS-CoV-2 B.1.351 变体(TY8-612 株)会导致野生型实验室小鼠(BALB/c 和 C57BL/6 J 小鼠)体重减轻和炎症细胞因子/趋化因子产生。此外,与同类小鼠相比,BALB/c 小鼠肺部病毒载量更高,症状更严重。重要的是,用 TY8-612 菌株感染老年 BALB/c 小鼠(6 个月以上)会引发多种促炎细胞因子/趋化因子的大量持续产生,并导致普遍死亡。这些结果表明,感染 SARS-CoV-2 B.1.351 变体的小鼠表现出从轻微到致命的症状,具体取决于其菌株和年龄。我们的数据提供了对 SARS-CoV-2 发病机制的深入了解,可能有助于开发预防措施和治疗方法。
Models of animals that are susceptible to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection can usefully evaluate the efficacy of vaccines and therapeutics. In this study, we demonstrate that infection with the SARS-CoV-2 B.1.351 variant (TY8-612 strain) induces bodyweight loss and inflammatory cytokine/chemokine production in wild-type laboratory mice (BALB/c and C57BL/6 J mice). Furthermore, compared to their counterparts, BALB/c mice had a higher viral load in their lungs and worse symptoms. Importantly, infecting aged BALB/c mice (older than 6 months) with the TY8-612 strain elicited a massive and sustained production of multiple pro-inflammatory cytokines/chemokines and led to universal mortality. These results indicated that the SARS-CoV-2 B.1.351 variant-infected mice exhibited symptoms ranging from mild to fatal depending on their strain and age. Our data provide insights into the pathogenesis of SARS-CoV-2 and may be useful in developing prophylactics and therapeutics.
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