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Antunes KH, Becker A, Franceschina C, de Freitas DDN, Lape I, da Cunha MD, Leitão L, Rigo MM, Pinto LA, Stein RT, de Souza APD. Respiratory syncytial virus reduces STAT3 phosphorylation in human memory CD8 T cells stimulated with IL-21. Sci Rep 2019; 9:17766. [PMID: 31780735 PMCID: PMC6882881 DOI: 10.1038/s41598-019-54240-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 11/07/2019] [Indexed: 12/21/2022] Open
Abstract
Respiratory syncytial virus (RSV) is a common cause of childhood lower respiratory tract infections. The recent failure of a vaccine candidate based on recombinant F protein underlines the urgent need to better understand the protective human memory immune response against RSV. Signal transducer and activator of transcription 3 (STAT3) protein is a transcription factor that promotes the maturation of the memory CD8 T cell response in cooperation with IL-10 and IL-21. However, the role of STAT3 in the memory CD8 T cell response during RSV infection remains to be elucidated. We found that in infants with bronchiolitis infected with RSV, the expression of STAT3 detected in nasal washes is reduced when compared to that in infants infected by other viruses. In vitro, RSV impairs STAT3 phosphorylation induced by IL-21 in purified human memory CD8 T cells. In addition, RSV decreases granzyme B production by memory CD8 T cells, reducing its cytotoxic activity against RSV-infected epithelial pulmonary cell lines. Together, these data indicate that RSV modulates the IL-21/STAT3 pathway in human memory CD8 T cells, and this could be a mechanism to be further explored to improve the memory response against the infection.
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Affiliation(s)
- Krist Helen Antunes
- Laboratory of Clinical and experimental Immunology, Infant Center, School of Medicine, Pontificia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - André Becker
- Laboratory of Clinical and experimental Immunology, Infant Center, School of Medicine, Pontificia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Caroline Franceschina
- Laboratory of Clinical and experimental Immunology, Infant Center, School of Medicine, Pontificia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Deise do Nascimento de Freitas
- Laboratory of Clinical and experimental Immunology, Infant Center, School of Medicine, Pontificia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Isadora Lape
- Laboratory of Clinical and experimental Immunology, Infant Center, School of Medicine, Pontificia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Mariana D'Ávila da Cunha
- Laboratory of Clinical and experimental Immunology, Infant Center, School of Medicine, Pontificia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Lidiane Leitão
- Laboratory of Respiratory Physiology, Infant Center, School of Medicine, PUCRS, Porto Alegre, Brazil
| | - Mauricio M Rigo
- Laboratory of Clinical and experimental Immunology, Infant Center, School of Medicine, Pontificia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - Leonardo Araújo Pinto
- Laboratory of Respiratory Physiology, Infant Center, School of Medicine, PUCRS, Porto Alegre, Brazil
| | - Renato T Stein
- Laboratory of Respiratory Physiology, Infant Center, School of Medicine, PUCRS, Porto Alegre, Brazil
| | - Ana Paula Duarte de Souza
- Laboratory of Clinical and experimental Immunology, Infant Center, School of Medicine, Pontificia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil. .,School of Health and Life Sciences, PUCRS, Porto Alegre, Brazil.
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