Effect of photobiomodulation therapy on oxidative stress markers of gastrocnemius muscle of diabetic rats subjected to high-intensity exercise.
Marcelo FrigeroSolange Almeida Dos SantosAndrey Jorge SerraCaroline Dos Santos Monteiro MachadoLeslie Andrews PortesPaulo José Ferreira TucciFlavio SilvaErnesto Cesar Leal-JuniorPaulo de Tarso Camillo de CarvalhoPublished in: Lasers in medical science (2018)
This study aimed to determine whether photobiomodulation therapy (PBMT) in diabetic rats subjected to high-intensity exercise interferes with the expression of the oxidative stress marker in the gastrocnemius muscle. Twenty-four male Wistar rats were included in this study comprising 16 diabetic and eight control rats. The animals were allocated into three groups-control, diabetic fatigue, and diabetic PBMT fatigue groups. Diabetes was induced via the intraperitoneal administration of streptozotocin (50 mg/kg). We subsequently assessed blood lactate levels and PBMT. The animals of the diabetic fatigue group PBMT were irradiated before the beginning of the exercises, with dose of 4 J and 808 nm, were submitted to treadmill running with speed and gradual slope until exhaustion, as observed by the maximum volume of oxygen and lactate level. The animals were euthanized and muscle tissue was removed for analysis of SOD markers, including catalase (CAT), glutathione peroxidase (GPx), and 2-thiobarbituric acid (TBARS) reactive substances. CAT, SOD, and GPx activities were significantly higher in the diabetic PBMT fatigue group (p < 0.05) than in the diabetic fatigue group. Outcomes for the diabetic PBMT fatigue group were similar to those of the control group (p > 0.05), while their antioxidant enzymes were significantly higher than those of the diabetic fatigue group. PBMT mitigated the TBARS concentration (p > 0.05). PBMT may reduce oxidative stress and be an alternative method of maintaining physical fitness when subjects are unable to perform exercise. However, this finding requires further testing in clinical studies.
Keyphrases
- diabetic rats
- high intensity
- oxidative stress
- type diabetes
- wound healing
- resistance training
- sleep quality
- skeletal muscle
- physical activity
- metabolic syndrome
- poor prognosis
- body composition
- nitric oxide
- depressive symptoms
- amyotrophic lateral sclerosis
- photodynamic therapy
- adipose tissue
- heat stress
- endothelial cells
- stress induced