Journal of Arak University of Medical Sciences

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The Effect of 12-Week Aerobic Training on Protein Tyrosine Phosphatase 1B Gene Expression and Insulin Resistance in Diabetic Rats

Rahman Soori, Fardin Fardin Sohrabi, Sirous Choobineh, Ali-Asghar Ravasi, Kazem Baesi, Sadegh Abbasian,
Volume 19, Issue 11 (2-2017)

Abstract

Abstract

Background: Protein tyrosine phosphatase 1B (PTP1B) is a key enzyme in dephosphorylation of the insulin receptor (IR) and it is a central factor to induce the insulin resistance. The purpose of this study was to evaluate the effect of 12-week aerobic training on protein tyrosine phosphatase 1B gene expression and insulin resistance in diabetic rats.

Materials and Methods: In this study, 16 Wistar rats were divided into aerobic training and control groups. After inducing diabetes intra protaneally, aerobic training group performed training protocol for 12 weeks and 5 session/week. The duration and speed of each session increased progressively as 18 to 26 m/min and 10 to 55 min, respectively. Then, blood and tissue (from gastrocnemius) sampling were carried out in diabetic rats. Insulin resistance markers and PTP1B gene expression were evaluated by commercial kits and Real-Time PCR method, respectively.

Results: Findings showed that PTP1B significantly was decreased in diabetic rats of aerobic training group (p=0.0001). Also, glucose and insulin resistance significantly was decreased in aerobic training groups (p=0.02 and p=0.006, respectively). However, insulin in control rats was significantly increased (p=0.015).

Conclusion: It seems that, current aerobic training protocol has capability to decrease PTP1B and insulin resistance in diabetic rats. Furthermore, the direct correlation between PTP1B and insulin illustrated that any changes in insulin resistance due to exercise training associated with diminution of negative regulation of insulin signaling pathway.

Effect of Four Weeks Exercise Prior Preparation before Alzheimer's Induction on the Levels of Nerve Growth Factor and Beta Amyloid in the Hippocampus of Wistar Male Rats

Atabak Shahed, Ali Asghar Ravasi, Sirous Choubineh, Davar Khodadadi,
Volume 20, Issue 11 (2-2018)

Abstract

Abstract
Background: The aim of this study was to investigate the effect of four weeks exercise prior preparation before Alzheimer's induction on the levels of nerve growth factor and beta amyloid in the hippocampus of Wistar male rats
Materials and Methods: 84 male Wistar rats (8 weeks old) with a weighing average of 20 ± 195 grams from Pasteur Institute of Iran were prepared, and rats were randomly divided to two exercise (4 weeks aerobic training on a treadmill with a gradient of 0 degrees, 5 days a week for 4 weeks) and rest groups. Then, the rats of each group were randomly assigned to 3 sub groups of 14 numbers, injection Aβ1-42, control, and non-injected. 48 hours after the last exercise session, injections into the hippocampus amyloid beta or Dimethyl sulfoxide were performed. Seven days after surgery, the rats of each group were randomly sacrificed or subjected to behavioral testing. To determine the levels of of nerve growth factor and beta amyloid Sampling was performed from the hippocampus and plasma of animals, a Morris water maze test was used for spatial memory test. Kolmogorov-Smirnov test (KS) and analysis of variance were used to analyze the data.
Results: The results of one-way analysis of variance showed that there was a significant difference between the levels of amylohyd of hippocampus and NGF in different groups. Also, the results of the probe test for spatial memory showed that the time spent on the target circle in the Aβ1-42 injection group was significantly lower than the other groups (p≤ 0.01). Also, the exercise and exercise + sham groups had a significantly better performance than control group.
Conclusion: It seems that performing physical activity before induction of Alzheimer's in rats is a kind of countermeasures and preeclampsia with physiological disorders and progression of the disease.

Effect of 8 Weeks of High-intensity Interval Training on Adropin and Nitric Oxide Metabolites in Overweight Men

Sadegh Abbasian, Ali Asghar Ravasi, Rahman Soori, Sirous Choobineh,
Volume 25, Issue 2 (June & July 2022)

Abstract

Background and Aim Adropin is a new hormone plays an important role in improving lipid metabolism and vascular protection. The current study aims to determine the effect of eight weeks of high-intensity interval training (HIIT) on Adropin level and nitric oxide (NO) metabolites in overweight men.
Methods & Materials This is a quasi-experimental study with a pre-test/post-test design. Participants were 32 overweight men (Mean±SD age: 30.5±3.07 years, BMI: 27.93±4.2 kg/m2). They were randomly divided into two groups of HIIT (n=16) and control (n=16). The VO2max test was first conducted. Then, the HIIT group performed 8 weeks of HIIT (3 days per week) at 20 sessions of 30 seconds with a 13-s interval between each session. Body composition was measured using a bioelectrical impedance analyzer and the blood sampling was done for measuring Adropin and NO metabolites by ELISA kits in pre-test and post-test phases. The data analysis was done by repeated-measures ANOVA. The significance level was set at P<0.05.
Ethical Considerations This study was approved by the ethics committee of the University of Tehran (Code: IR.UT.REC.1395007). All procedures were in accordance with guidelines of the declaration of Helsinki.
Results There was a significant difference in Adropin between HIIT and control groups (0.88±0.256; 95% CI: 0.26-1.5 ng/mL). There was also a significant difference in NO metabolites between the two groups (7.5±3.03; 95% CI: 0.85-14.15 ng/ml). Moreover, there was a positive relationship between Adropin and NO metabolites in overweight men (r=0.498, P=0.0001).
Conclusion It seems that HIIT can attenuate cardiovascular diseases by increasing Adropin and NO and can improve cardiovascular fitness (VO2max) and body composition of men with overweight.

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