Vaccination by inactivated vaccine is an effective strategy to prevent the COVID-19pandemic.However,the detailed molecular immune response at single-cell level is poorly un-derstood.In this study,we systematically del...Vaccination by inactivated vaccine is an effective strategy to prevent the COVID-19pandemic.However,the detailed molecular immune response at single-cell level is poorly un-derstood.In this study,we systematically delineated the landscape of the pre-and post-vaccination single-cell transcriptome,TCR(T cell antigen receptor)and BCR(B cell antigen re-ceptor)expression profile of vaccinated candidates.The bulk TCR sequencing analysis of COV-ID-19 patients was also performed.Enrichment of a clonal CD8+T cell cluster expressingspecific TCR was identified in both vaccination candidates and COVID-19 patients.These clonalCD8+T cells showed high expression of cytotoxicity,phagosome and antigen presentationrelated genes.The cellecell interaction analysis revealed that monocytes and dendritic cellscould interact with these cells and initiate phagocytosis via ICAM1-ITGAM and ITGB2 signaling.Together,our study systematically deciphered the detailed immunological response duringSARS-CoV-2 vaccination and infection.It may facilitate understanding the immune responseand the T-cell therapy against COVID-19.展开更多
基金the National Natural Science Foundation of China(No.31941014 to G.C)the Key Research and Development Program of Guangdong Province(No.2019B020211003 to G.C.)Fundamental Research Funds for the Central Universities(No.2662018PY025 to G.C.).
文摘Vaccination by inactivated vaccine is an effective strategy to prevent the COVID-19pandemic.However,the detailed molecular immune response at single-cell level is poorly un-derstood.In this study,we systematically delineated the landscape of the pre-and post-vaccination single-cell transcriptome,TCR(T cell antigen receptor)and BCR(B cell antigen re-ceptor)expression profile of vaccinated candidates.The bulk TCR sequencing analysis of COV-ID-19 patients was also performed.Enrichment of a clonal CD8+T cell cluster expressingspecific TCR was identified in both vaccination candidates and COVID-19 patients.These clonalCD8+T cells showed high expression of cytotoxicity,phagosome and antigen presentationrelated genes.The cellecell interaction analysis revealed that monocytes and dendritic cellscould interact with these cells and initiate phagocytosis via ICAM1-ITGAM and ITGB2 signaling.Together,our study systematically deciphered the detailed immunological response duringSARS-CoV-2 vaccination and infection.It may facilitate understanding the immune responseand the T-cell therapy against COVID-19.
