Author: Pontelli, Marjorie C; Castro, Italo A; Martins, Ronaldo B; Veras, Flávio P; Serra, Leonardo La; Nascimento, Daniele C; Cardoso, Ricardo S; Rosales, Roberta; Lima, Thais M; Souza, Juliano P; Caetité, Diego B; de Lima, Mikhael H F; Kawahisa, Juliana T; Giannini, Marcela C; Bonjorno, LetÃcia P; Lopes, Maria I F; Batah, Sabrina S; Siyuan, Li; Assad, Rodrigo L; Almeida, Sergio C L; Oliveira, Fabiola R; Benatti, MaÃra N; Pontes, Lorena L F; Santana, Rodrigo C; Vilar, Fernando C; Martins, Maria A; Cunha, Thiago M; Calado, Rodrigo T; Alves-Filho, José C; Zamboni, Dario S; Fabro, Alexandre; Louzada-Junior, Paulo; Oliveira, Rene D R; Cunha, Fernando Q; Arruda, Eurico
Title: Infection of human lymphomononuclear cells by SARS-CoV-2. Cord-id: 9sm4wvyf Document date: 2020_8_7
ID: 9sm4wvyf
Snippet: Although SARS-CoV-2 severe infection is associated with a hyperinflammatory state, lymphopenia is an immunological hallmark, and correlates with poor prognosis in COVID-19. However, it remains unknown if circulating human lymphocytes and monocytes are susceptible to SARS-CoV-2 infection. In this study, SARS-CoV-2 infection of human peripheral blood mononuclear cells (PBMCs) was investigated both in vitro and in vivo . We found that in vitro infection of whole PBMCs from healthy donors was produc
Document: Although SARS-CoV-2 severe infection is associated with a hyperinflammatory state, lymphopenia is an immunological hallmark, and correlates with poor prognosis in COVID-19. However, it remains unknown if circulating human lymphocytes and monocytes are susceptible to SARS-CoV-2 infection. In this study, SARS-CoV-2 infection of human peripheral blood mononuclear cells (PBMCs) was investigated both in vitro and in vivo . We found that in vitro infection of whole PBMCs from healthy donors was productive of virus progeny. Results revealed that monocytes, as well as B and T lymphocytes, are susceptible to SARS-CoV-2 active infection and viral replication was indicated by detection of double-stranded RNA. Moreover, flow cytometry and immunofluorescence analysis revealed that SARS-CoV-2 was frequently detected in monocytes and B lymphocytes from COVID-19 patients, and less frequently in CD4 + T lymphocytes. The rates of SARS-CoV-2-infected monocytes in PBMCs from COVID-19 patients increased over time from symptom onset. Additionally, SARS-CoV-2-positive monocytes and B and CD4+T lymphocytes were detected by immunohistochemistry in post mortem lung tissue. SARS-CoV-2 infection of blood circulating leukocytes in COVID-19 patients may have important implications for disease pathogenesis, immune dysfunction, and virus spread within the host.
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