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Acute HIV-1 and SARS-CoV-2 infections Share Slan+ Monocyte Depletion - evidence from an hyperacute HIV-1 case report
Publication . Farias, Guilherme B.; Badura, Robert; Conceição, Carolina M.; Gomes, André; Godinho-Santos, Ana; Laia, Joel; Rosmaninho, Pedro; Santos, Diana; Mota, Catarina; Almeida, Afonso; Fernandes, Susana M.; Trombetta, Amelia Chiara; Sousa, Ana E.
Monocytes are key modulators in acute viral infections, determining both inflammation and development of specific B- and T-cell responses. Recently, these cells were shown to be associated to different SARS-CoV-2 infection outcome. However, their role in acute HIV-1 infection remains unclear. We had the opportunity to evaluate the mononuclear cell compartment in an early hyper-acute HIV-1 patient in comparison with an untreated chronic HIV-1 and a cohort of SARS-CoV-2 infected patients, by high dimensional flow cytometry using an unsupervised approach. A distinct polarization of the monocyte phenotype was observed in the two viral infections, with maintenance of pro-inflammatory M1-like profile in HIV-1, in contrast to the M2-like immunosuppressive shift in SARS-CoV-2. Noticeably, both acute infections had reduced CD14low/-CD16+ non-classical monocytes, with depletion of the population expressing Slan (6-sulfo LacNac), which is thought to contribute to immune surveillance through pro-inflammatory properties. This depletion indicates a potential role of these cells in acute viral infection, which has not previously been explored. The inflammatory state accompanied by the depletion of Slan+ monocytes may provide new insights on the critical events that determine the rate of viral set-point in acute HIV-1 infection and subsequent impact on transmission and reservoir establishment.
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Fundação para a Ciência e a Tecnologia
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OE
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78083