Seyedeh Tahereh Haeri, Mohammad Ali Azarbayjani, Maghsoud Peeri,
Volume 13, Issue 4 (Jul-Aug 2019)
Abstract
Background and Objectives: Apoptosis is essential for the survival and normal functioning of multicellular organisms, yet any interruption in this process could be detrimental. Increased production of reactive oxygen species and oxidative stress are key factors affecting apoptosis. Our objective was to determine the impact of exercise with and without vitamin D supplementation on expression of FLIP, Fas, and caspase 8 in lung of rats poisoned with H2O2.
Methods: Forty-eight adult male rats were randomly divided into six groups: (C), (H), (HD), (HE), (HDE) and dimethyl sulfoxide. Groups H, HE, HD and HDE received 1 mmol/Kg intraperitoneal injection of H2O2. HE and HDE groups ran on treadmill for eight weeks. Expression of FLIP, Fas and caspase 8 was measured in lung tissues using RT-qPCR. Statistical analysis of data was carried out using SPSS 22 at significance level of 0.05.
Results: Vitamin D supplementation caused a significant decrease in expression of Fas (P=0.014) and caspase 8 (P=0.016) compared to the control group. However, it significantly overexpressed FLIP in the lung tissues compared to the control group (P=0.005). Exercise with and without vitamin D supplementation had no significant effect on the expression of the apoptosis regulatory genes.
Conclusion: Our results show that VD exerts protective effects on lung tissue by regulating apoptotic factors. Aerobic exercise alone and combined with VD has no significant effect on the apoptotic factors. These results indicate that VD supplementation can reduce lung injury under oxidative stress conditions.
Seyedeh Tahereh Haeri, Mohammad Ali Azarbayjani, Maghsoud Peeri,
Volume 14, Issue 4 (Jul-Aug 2020)
Abstract
Background and Objectives: Prolonged exercise can reduce physiological capacities and cause DNA damage by inducing oxidative stress and inflammatory responses. Aerobic exercise reduces the risk of cancer by activating DNA repair enzymes and reducing oxidative stress. The aim of the present study was to investigate effects of eight weeks of aerobic exercise with and without vitamin D supplementation on DNA damage.
Methods: Forty-eight adult male rats were randomly divided into six groups: control (C), H2O2 (H), H2O2 and vitamin D (HD), H2O2 and exercise (HE), H2O2,, vitamin D and exercise (HDE), and dimethyl sulfoxide. Cancer was stimulated through intraperitoneal injection of H2O2 (2 mmol/kg). Animals in groups HE and HDE ran on treadmill for eight weeks. Concentration of 8-hydroxy-2'-deoxyguanosine (8-OHdG) and O6-methylguanine DNA methyltransferase (MGMT) was measured by enzyme-linked immunosorbent assay. Statistical analysis of data was carried out using SPSS 22 at significance level of 0.05.
Results: Vitamin D supplementation significantly lowered the level of 8-OHdG expression compared to the control group (P=0.0001). The 8-OHdG expression in the exercise group was slightly lower than control group (P=0.063). Combination of exercise and vitamin D supplementation had no significant effect on expression of 8-OHdG (P=0.281). Both exercise and vitamin D supplementation significantly increased MGMT expression compared to the control group (P=0.0001 and P=0.040). However, combination of exercise and vitamin D supplementation had no significant effect on MGMT expression (P=0.326).
Conclusion: The results showed that aerobic exercise and vitamin D supplementation can have protective effects against DNA damage, possibly by increasing antioxidant capacity and DNA repair.
