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Sousa MEP, Gonzatti MB, Fernandes ER, Freire BM, Guereschi MG, Basso AS, Andersen ML, Rosa DS, Keller AC. Invariant Natural Killer T cells resilience to paradoxical sleep deprivation-associated stress. Brain Behav Immun 2020; 90:208-215. [PMID: 32827702 DOI: 10.1016/j.bbi.2020.08.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 08/14/2020] [Accepted: 08/17/2020] [Indexed: 01/12/2023] Open
Abstract
Although several studies demonstrate that stressful situations, such as sleep disturbances, negatively impact the innate and adaptive arms of the immune system, their influence on invariant Natural Killer T (iNKT) cells remains unclear. iNKT cells are CD1d-restricted innate T cells that recognize glycolipid antigens and rapidly produce polarizing cytokines being key players in several immune responses, and a potential target for immunotherapy. iNKT cells differ in several aspects from conventional T lymphocytes, including a unique dependence on CD1d-expressing double-positive (DP) thymocytes for intrathymic maturation. As a consequence of stress, DP thymocytes undergo glucocorticoid-induced apoptosis, which might compromise iNKT developmental pathway. Therefore, we used a paradoxical sleep deprivation (SD) model to determine the impact of sleep disturbance on iNKT cell biology. After 72 h of SD, C57Bl/6 mice exhibited a significant increase in systemic glucocorticoid levels and thymus atrophy. Despite marked decrease in the number of DP thymocytes, the ratio CD1d+/CD1d- was higher in SD mice, and the number of thymic iNKT cells remained unaltered, suggesting that SD did not compromise the iNKT developmental pathway. In contrast, SD reduced hepatic IFN-γ, but not, IL-4-producing iNKT cells, without further effect in the spleen. Despite this fact, SD did not affect stimulation of IFN-γ production by iNKT cells, or cytokine release, in response to α-galactosylceramide, a specific antigen. Furthermore, although SD impaired splenic NK cells activity against tumor cells, it did not affect iNKT cell-specific cytotoxicity. Thus, our study shows that SD-induced stress did not impair the iNKT cells' responses to a cognate antigen.
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Affiliation(s)
- Maria E P Sousa
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo (UNIFESP/EPM), Rua Botucatu, 862, 4(th) floor. 04023-062 São Paulo, Brazil
| | - Michelangelo B Gonzatti
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo (UNIFESP/EPM), Rua Botucatu, 862, 4(th) floor. 04023-062 São Paulo, Brazil
| | - Edgar R Fernandes
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo (UNIFESP/EPM), Rua Botucatu, 862, 4(th) floor. 04023-062 São Paulo, Brazil
| | - Beatriz M Freire
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo (UNIFESP/EPM), Rua Botucatu, 862, 4(th) floor. 04023-062 São Paulo, Brazil
| | - Márcia G Guereschi
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo (UNIFESP/EPM), Rua Botucatu, 862, 4(th) floor. 04023-062 São Paulo, Brazil
| | - Alexandre S Basso
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo (UNIFESP/EPM), Rua Botucatu, 862, 4(th) floor. 04023-062 São Paulo, Brazil
| | - Monica L Andersen
- Department of Psychobiology, Federal University of São Paulo (UNIFESP/EPM), Rua Botucatu, 862, 1(st) floor, 04023-062 São Paulo, Brazil
| | - Daniela S Rosa
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo (UNIFESP/EPM), Rua Botucatu, 862, 4(th) floor. 04023-062 São Paulo, Brazil; Institute for Investigation in Immunology (iii)-INCT, São Paulo, Brazil.
| | - Alexandre C Keller
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo (UNIFESP/EPM), Rua Botucatu, 862, 4(th) floor. 04023-062 São Paulo, Brazil.
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