Published in:
01-12-2018 | Original Article
Photobiomodulation reduces neutrophil migration and oxidative stress in mice with carrageenan-induced peritonitis
Authors:
Mariana de Souza Costa, Ramon Handerson Gomes Teles, Yago Medeiros Dutra, José Carlos Rapozo Mazulo Neto, Tarcisio Vieira de Brito, Francisca Francisete de Sousa Nunes Queiroz, Donária Bezerra Nobre do Vale, Luan Kelves Miranda de Souza, Irismara Sousa Silva, André Luiz dos Reis Barbosa, Jand-Venes Rolim Medeiros, Nivaldo Antonio Parizotto, Marcelo de Carvalho Filgueiras
Published in:
Lasers in Medical Science
|
Issue 9/2018
Login to get access
Abstract
The purpose of the study is to investigate the effects of two doses of photobiomodulation (PBM) on inflammatory parameters including cell migration and oxidative stress in carrageenan-induced peritonitis models. Twenty-eight mice were divided into four groups: saline; untreated carrageenan (Cg; inflammation induced); and PMB treatment groups L1 and L5 (inflammation induced with carrageenan followed by laser irradiation at 1 and 5 J/cm2, respectively). After 30 min of inducing inflammation, laser irradiation was administered every hour, for 4 h. Peritoneal fluid was collected for analyses. The total leukocyte number in the peritoneal fluid in L1 (4.33 ± 2.34) and L5 (4.95 ± 2.86) after PBM was lower than that in Cg (10.93 ± 5.15 cells/ml). The average differential count of neutrophils in the Cg was 9.46 ± 4.31 cells/ml, which was higher than that in L1 (3.7 ± 2.08) and L5 (4.94 ± 2.57). Myeloperoxidase activity was also lower in L1 (1.89 ± 0.43) and L5 (4.84 ± 2.62) than in Cg (22.92 ± 4.52 UMPO/ml). Malondialdehyde content was lower in L1 (137.5 ± 12.33) and L5 (169.6 ± 22.77) than in Cg (345.7 ± 65.67 nmol/ml). Glutathione peroxidase concentration was significantly higher in L1 (155.2 ± 12.43) and L5 (145.9 ± 9.585) than in Cg (79.75 ± 9.567 μ/ml). Nitrite concentration was lower in L1 (0.3317 μM ± 0.0669) and L5 (0.2429 μM ± 0.0232) than in Cg (0.8380 μM ± 0.01615). Laser irradiation at 1 and 5 J/cm2 reversed the inflammation (as indicated by neutrophil infiltration and oxidative stress).