Laboratory of Cellular and Molecular Immunology, Gavin Herbert Eye Institute, School of Medicine, University of California Irvine, Irvine, California, USA.
Laboratory of Cell Biology and Molecular Genetics, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco.
J Virol. 2023 Dec 21;97(12):e0109623. doi: 10.1128/jvi.01096-23. Epub 2023 Dec 1.
Although the current rate of SARS-CoV-2 infections has decreased significantly, COVID-19 still ranks very high as a cause of death worldwide. As of October 2023, the weekly mortality rate is still at 600 deaths in the United States alone, which surpasses even the worst mortality rates recorded for influenza. Thus, the long-term outlook of COVID-19 is still a serious concern outlining the need for the next-generation vaccine. This study found that a prime/pull coronavirus vaccine strategy increased the frequency of functional SARS-CoV-2-specific CD4 and CD8 memory T cells in the lungs of SARS-CoV-2-infected triple transgenic HLA-DR0101/HLA-A0201/hACE2 mouse model, thereby resulting in low viral titer and reduced COVID-19-like symptoms.
尽管目前 SARS-CoV-2 感染率显著下降,但 COVID-19 仍然是全球范围内非常高的死亡原因。截至 2023 年 10 月,仅在美国,每周的死亡率仍高达 600 人死亡,甚至超过了流感记录的最严重死亡率。因此,COVID-19 的长期前景仍然是一个严重的问题,这突显了对下一代疫苗的需求。本研究发现,一种初免-加强型冠状病毒疫苗策略增加了 SARS-CoV-2 感染的三重转基因 HLA-DR0101/HLA-A0201/hACE2 小鼠模型肺部中功能性 SARS-CoV-2 特异性 CD4 和 CD8 记忆 T 细胞的频率,从而导致低病毒滴度和减轻 COVID-19 样症状。