Showing 7 results for Irisin
Mousa Khalafi, Ali Asghar Ravasi, Fatemeh Shabkhiz, Mohammad Moradi, Yashar Zarei,
Volume 15, Issue 4 (5-2016)
Abstract
Background: Irisin was identified as a myokine secreted by exercise which plays an important role in energy metabolism and regulation of metabolic diseases such as diabetes. The aim of the present study is to investigate the effects of high intensity interval exercise (HIIE) and moderate intensity continuous exercise (MICE) on serum irisin and Subcutaneous UCP-1 in diabetic male rats.
Methods: In this study, 29 diabetic Wistar rats (12 week- age, 220-240 gr- weight) were assigned to 5 groups: immediately and 2 hours after high intensity interval exercise (HIIE0, HIIE2), immediately and 2 hours after moderate intensity continuous exercise (MICE0, MICE2) and control (C). Both MICE groups performed on the treadmill with intensity 60-65% vo2max for 40 minutes and both HIIE groups with intensity 90-95% vo2max in the 12 interval-one minute period and 1 minute rest intervals. ELISA was used to measure serum irisin and subcutaneous fat UCP-1. One-way ANOVA and Tukey post hoc test has used to data analysis, the level of significance has been considered at P≤0/05.
Results: Data analysis showed serum irisin levels in the HIIE0 group and subcutaneous fat UCP-1 in the HIIE2 significantly increased compared to the control group (p˂0/05). However, there was no significant difference between other research groups (P>0/05).
Conclusion: It seems high intensity of exercise had important roles in significant changes of serum irisin levels and subcutaneous fat UCP-1in diabetic rats.
Bahareh Heidari Sharif Abadi, Farzaneh Taghian,
Volume 17, Issue 6 (10-2018)
Abstract
Background: The purpose of this study was to determine the effect of 10 weeks of Intensity Interval Training and Supplementation green tea on serum level of irisin and insulin resistance in obese women with type 2 diabetes
Methods: In this semi-experimental study,48 women with type II diabetes (aged 49/55±3/04 years with Weight 76/72±5/78 kg, Height 153/33±5/06 Cm, BMI 31/75±1/41 Kg/m2, selected and grouped randomly into four groups the intensity interval training (n=12), combined (green tea extract along with intensity interval training) (n=12) green tea extract (n=12), and the control group(n=12). Training group performed training programs including 3sessions per week at maximum intensity of 75-85% heart rate and the supplement group consumed 3 tablets of green tea (500 mg) daily for 10 weeks high intensity interval training and the supplement group both underwent intervention. Blood samples were collected before and after the intervention in fasting state. The obtained data was analyzed using of variance (ANOVA) and Tukey post hoc test and paired t-test analysis. The significant level was P<0/05.
Results: The results showed that irisin levels and maximum oxygen consumption in all three groups increased significantly after 10 weeks compared to the control group (P≤0.05) Also, the results indicate a significant increase in irezin in the combined group compared with the green tea group. Serum insulin level, glucose, insulin resistance and weight, body mass index decreased significantly in all three groups compared to control group and green tea group and combination group (P≤0.05).No significant difference was found between the groups in the irisin levels)P>0.05).
Conclusion: Regarding the results of this study, it seems that performing periodic exercises along with supplementation of green tea due to increased irisin and glucose reduction can be helpful in improving insulin resistance in patients with type 2 diabetes. Perhaps the desired results can be achieved by increasing the duration of exercise and supplementation with iyrosin and the maximum oxygen intake.
Zahra Nourollahi, Vahid Valipour Dehnou, Rasoul Eslami,
Volume 18, Issue 4 (4-2019)
Abstract
Background: Physical activity is an effective stimulant for improving the health of elderly people with metabolic syndrome by increasing energy consumption and thus reducing body fat. The purpose of this study was to investigate the effect of 8 weeks of high intensity circuit training (HICT) on serum BDNF and Irisin levels and body weight in elderly women with metabolic syndrome in Khorramabad city.
Methods: In this semi-experimental study, 18 females (age 71.00 ± 6.17 years; weight 62.22 ± 9.18 kg; height 153.67 ± 3.27 cm) with metabolic syndrome voluntarily participated. During their daily routine, the subjects participated in an 8-week HICT protocol that performed 3 sessions per week. 24 hours before the training protocol and 48 hours after the training protocol, the fasting blood sample was taken by the laboratory expert between 7:30 minutes to 8 hours. ELISA kits were used to measure serum levels of BDNF and Irisin. The paired-Samples T test was used to identify any significant differences and statistical significance was set at p < .05.
Results: The results showed a significant increase in serum BDNF (p = .001) and Irisin (p = .033) levels and significant decrease in body weight (p = .001) in comparison with pre-test values in elderly women with metabolic syndrome.
Conclusion: High intensity circuit training in elderly women with metabolic syndrome increases serum BDNF and Irisin concentrations and possibly, the increase in these two factors can have beneficial effects on the lipid profile and finally body weight of these individuals.
Mohamad Baghadam, Khalid Mohamadzadeh Salamat, Kamal Azizbeidi, Kazem Baesi,
Volume 18, Issue 5 (7-2019)
Abstract
Background: Cardiomyopathy is one of adverse effects of diabetes that associated with cardiac muscle metabolism and function disruption. Exercise training decreases adverse effects of diabetes on heart by changing genes involved in cardiac metabolism and increasing myokines secretion. So, the aim of this study was to investigate of 8 weeks aerobic training on cardiac PGC-1α gene expression and plasma irisin in STZ-induced diabetics’ rats.
Methods: 16 STZ-induced diabetics Wistar rats (10 weeks old) divided into control and aerobic training groups. Time and intensity of exercise session began with 15 minutes and 10 m/min, and gradually increased to 40 minutes and 25 m/min at seventh week and kept to the end of eighth’s week (8 weeks). Cardiac PGC-1α gene expression analyzed by PCR, and plasma concentration of insulin, glucose were analyzed by ELISA method 48 hours after the last session of exercise training. Data were analyzed by independent t test at alpha level of 0/05.
Results: the results showed that aerobic exercise training increased PGC-1α concentration (P<0/001) and plasma irisin (P<0/001). Further analysis showed that aerobic exercise training decreased glucose concentration (P<0/001) and increased insulin concentration (P<0/001), but had no effect of insulin resistance (P=0/79). In addition, the results revealed that there is a positive correlation between PGC-1α and plasma irisin (P<0/001) and insulin (P=0/019), but it has a negative correlation with plasma glucose (P=0/001). There is also a positive significant correlation between isirin and insulin (P=0/001), and a negative correlation between irisin and glucose (P=0/002).
Conclusion: The findings suggest that aerobic exercise training induces increased cardiac PGC-1α gene expression and plasma irisin. These changes have a significant correlation with lowered glucose and increased plasma insulin insulin in STZ-induced diabetics’ rats.
Zahra Yaghoubi, Bahram Abedi,
Volume 21, Issue 2 (7-2021)
Abstract
Background: Diabetes type 2 is a metabolic disorder that it caused by insulin resistance. The aim of this research was to study the effect of eight weeks of aerobic exercise with ginger supplement on FGF21, Irisin and insulin resistance in women with type 2 diabetes.
Methods: In a quasi-experimental study with pretest posttest design, 24 women with type 2 diabetes were selected available and purposely as sample. The subjects divided randomly into two groups of control (placebo and exercise) and experimental (supplement and exercise). The experimental group take part in an exercise with moderate intensity 65-70 percent of target heart rate and three session per week. Ginger supplementation was performed at the same time for training with daily consumption of 1 g of ginger extract (250 g capsules) and four servings daily. The control group (placebo) also used similar capsules containing roasted flour. To evaluate serum levels of variables, blood sampling was taken from all subjects 24 hr before and after exercise and supplement intervention at 10hr fasting state.
Results: Data were analyzed by using covariance test (p<0.05). The results showed that eight weeks of aerobic training and ginger supplementation lead to increase in Irisin levels (p=0.0001), FGF21 (p=0.0001) and decrease in insulin resistance index (p=0.0001).
Conclusion: Results indicated that using aerobic exercise and ginger supplement versus aerobic exercise could have positive effects on regulatory factors of energy in people with type 2 diabetes.
Sohila Mardani, Sayed Abbas Binias, Sajjad Ramezani,
Volume 22, Issue 2 (7-2022)
Abstract
Background: Irisin is a myokine that is released from FNDC5 membrane protein and has positive effects on carbohydrate metabolism. The aim of this study was to evaluate the effect of 8 weeks of aerobic exercise on irisin levels and insulin resistance in middle-aged women with type 2 diabetes.
Methods In this quasi-experimental study, 24 women with type 2 diabetes were purposefully selected and randomly divided into two groups of aerobic exercise (n = 12) and control (n = 12). The training group performed aerobic exercises for 8 minutes (3 sessions per week) for 50 minutes with an intensity of 45-85% of the maximum heart rate on the treadmill. The control group did not engage in any physical activity during exercise. Blood samples were collected 24 hours before and 48 hours after the last training session and the serum was used to measure the levels of irzin, insulin resistance index (HOMA-IR), fasting glucose and insulin. Correlated t-test and independent t-test were used to examine intra-group changes and differences between groups. Data analysis was performed using SPSS software (version 22) at a significant level (P≥0.05).
Results: Intragroup changes showed that 8 weeks of aerobic exercise increased serum levels of irizin (P = 0.000), significantly decreased insulin resistance index (HOMA-IR) (P = 0.000), fasting glucose and insulin ratio (P = 0.001) ratio He became diabetic in the control group. Also, in comparison between groups, aerobic exercise caused a significant increase in levels of irizin (P = 0.001) and a decrease in insulin resistance index (HOMA-IR), fasting glucose (P = 0.001) and insulin (P = 0.001) compared to the control group. He became diabetic.
Conclusion: Aerobic exercise, through its beneficial effect on increasing irisin levels and decreasing insulin resistance index, is an effective factor in improving glucose metabolism in type 2 diabetic patients.
Hadi Golpasandi, Mohammad Rahman Rahimi, Slahadin Ahmadi,
Volume 23, Issue 5 (12-2023)
Abstract
Background: The present study was conducted to investigate the effect of eight weeks of aerobic training and vitamin D3 supplementation on cardiac irisin protein levels, insulin resistance and lipid profile in rats induced with type 2 diabetes.
Methods: Forty male Wistar rats after induction of type 2 diabetes through the combination of high-fat diet +streptozotocin were randomly divided into five groups: 1) Normal control (NC) ,2) Diabetic Control (DC), 3) Diabetes+ Aerobic Training (DAT) ,4) Diabetes+ Vitamin D3 (DVD) and 5) Diabetes+ Aerobic Training+ Vitamin D3 (DVDAT). Aerobic training program (five times a week with 60% intensity of maximum running speed for one hour) and vitamin D3 supplementation (10000 IU/kg every week) were performed. After anesthetizing the rats, blood samples were taken to evaluate serum glucose, insulin, triglyceride, cholesterol, LDL and HDL levels. The heart tissue was isolated to evaluate the irisin.protein.
Results: The results of the one way analysis of variance showed that the irisin protein level of the heart tissue in DAT, DVD and DVDAT groups had a significant increase of 14.04, 12.28 and 24.56%, respectively compared to DC (P<0.001). Insulin resistance also showed a significant decrease in all intervention groups compared to the DC group (P<0.001); However, HDL, triglyceride and cholesterol levels were significantly decreased in DAT and DVDAT groups compared to DC group (P<0.001).
Conclusion: According to the results, it seems that eight weeks of aerobic training and vitamin D3 supplementation probably improves the insulin resistance index and lipid profile in rats induced to type 2 diabetes through increasing the cardiac irisin.
