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de Brito AA, Gonçalves Santos T, Herculano KZ, Estefano-Alves C, de Alvarenga Nascimento CR, Rigonato-Oliveira NC, Chavantes MC, Aimbire F, da Palma RK, Ligeiro de Oliveira AP. Photobiomodulation Therapy Restores IL-10 Secretion in a Murine Model of Chronic Asthma: Relevance to the Population of CD4 +CD25 +Foxp3 + Cells in Lung. Front Immunol 2022; 12:789426. [PMID: 35185864 PMCID: PMC8847394 DOI: 10.3389/fimmu.2021.789426] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 12/13/2021] [Indexed: 12/13/2022] Open
Abstract
It is largely known that photobiomodulation (PBM) has beneficial effects on allergic pulmonary inflammation. Our previous study showed an anti-inflammatory effect of the PBM in an acute experimental model of asthma, and we see that this mechanism is partly dependent on IL-10. However, it remains unclear whether the activation of regulatory T cells is mediated by PBM in a chronic experimental model of asthma. In this sense, the objective of this study was to verify the anti-inflammatory role of the PBM in the pulmonary inflammatory response in a chronic experimental asthma model. The protocol used for asthma induction was the administration of OVA subcutaneously (days 0 and 14) and intranasally (3 times/week, for 5 weeks). On day 50, the animals were sacrificed for the evaluation of the different parameters. The PBM used was the diode, with a wavelength of 660 nm, a power of 100 mW, and 5 J for 50 s/point, in three different application points. Our results showed that PBM decreases macrophages, neutrophils, and lymphocytes in the bronchoalveolar lavage fluid (BALF). Moreover, PBM decreased the release of cytokines by the lung, mucus, and collagen in the airways and pulmonary mechanics. When we analyzed the percentage of Treg cells in the group irradiated with laser, we verified an increase in these cells, as well as the release of IL-10 in the BALF. Therefore, we conclude that the use of PBM therapy in chronic airway inflammation attenuated the inflammatory process, as well as the pulmonary functional and structural parameters, probably due to an increase in Treg cells.
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Affiliation(s)
- Aurileia Aparecida de Brito
- Department of Research, Development and Innovation, Innovative Health System Health Management (IHS Medicine and Technology), São Paulo, Brazil
| | - Tawany Gonçalves Santos
- Post-Graduate Program in Biophotonics Applied to Health Sciences, University Nove de Julho (UNINOVE), São Paulo, Brazil
| | - Karine Zanella Herculano
- Post-Graduate Program in Biophotonics Applied to Health Sciences, University Nove de Julho (UNINOVE), São Paulo, Brazil
| | - Cintia Estefano-Alves
- Post-Graduate Program in Biophotonics Applied to Health Sciences, University Nove de Julho (UNINOVE), São Paulo, Brazil
| | | | | | | | - Flávio Aimbire
- Translational Medicine, Federal University of São Paulo—UNIFESP, São José dos Campos, Brazil
| | - Renata Kelly da Palma
- Department of Surgery, School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, Brazil
- Facultad de Ciencias Experimentales, Universidad Francisco de Vitoria, Madrid, Spain
- Human Movement and Rehabilitation, Post-Graduate Program Medical School, Evangelic University of Anápolis—UniEVANGELICA, Anápolis, Brazil
| | - Ana Paula Ligeiro de Oliveira
- Post-Graduate Program in Biophotonics Applied to Health Sciences, University Nove de Julho (UNINOVE), São Paulo, Brazil
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