| Autor: |
Kalpana Manthiram, Qin Xu, Pedro Milanez-Almeida, Andrew Martins, Andrea Radtke, Kenneth Hoehn, Jinguo Chen, Can Liu, Juanjie Tang, Gabrielle Grubbs, Sydney Stein, Sabrina Ramelli, Juraj Kabat, Hengameh Behzadpour, Maria Karkanitsa, Jacquelyn Spathies, Heather Kalish, Lela Kardava, Martha Kirby, Foo Cheung, Silvia Preite, Patrick Duncker, Nahir Romero, Diego Preciado, Lyuba Gitman, Galina Koroleva, Grace Smith, Arthur Shaffer, Ian McBain, Stefania Pittaluga, Ronald Germain, Richard Apps, Kaitlyn Sadtler, Susan Moir, Daniel Chertow, Steven Kleinstein, Surender Khurana, John Tsang, Pamela Mudd, Pamela Schwartzberg |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Research square. |
| Popis: |
SARS-CoV-2 infection triggers adaptive immune responses from both T and B cells. However, most studies focus on peripheral blood, which may not fully reflect immune responses in lymphoid tissues at the site of infection. To evaluate both local and systemic adaptive immune responses to SARS-CoV-2, we collected peripheral blood, tonsils, and adenoids from 110 children undergoing tonsillectomy/adenoidectomy during the COVID-19 pandemic and found 24 with evidence of prior SARS-CoV-2 infection, including detectable neutralizing antibodies against multiple viral variants. We identified SARS-CoV-2-specific germinal center (GC) and memory B cells; single cell BCR sequencing showed that these virus-specific B cells were class-switched and somatically hypermutated, with overlapping clones in the adenoids and tonsils. Oropharyngeal tissues from COVID-19-convalescent children showed persistent expansion of GC and anti-viral lymphocyte populations associated with an IFN-γ-type response, with particularly prominent changes in the adenoids, as well as evidence of persistent viral RNA in both tonsil and adenoid tissues of many participants. Our results show robust, tissue-specific adaptive immune responses to SARS-CoV-2 in the upper respiratory tract of children weeks to months after acute infection, providing evidence of persistent localized immunity to this respiratory virus. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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