Iranian Journal of Diabetes and Lipid Disorders

The impact of exercise training on liver enzymes and liver fat content in adults with NAFLD: A systematic review and meta-analysis

Fatemeh Kazeminasab

Background: Non-alcoholic fatty liver disease (NAFLD) is a pathological syndrome associated with increased serum levels of liver enzymes. The purpose of this study was to investigate the impact of exercise training on liver enzymes (ALT, AST, and GGT) and liver fat content in adults with NAFLD.
Methods: The PubMed, Web of Science, SID, Magiran, and Google scholar databases were searched until February 2022 for English and Persian articles. Meta-analyses were performed to compare the impact of exercise training on liver function in patients with fatty liver. SMD and 95% confidence interval (95% CI) were calculated using effect models. Also, the I2 test was used to determine heterogeneity, and the Funnel plot and Egger tests at a significant level of 0.1 were used to determine publication bias.
Results: The results of meta-analysis of 36 studies with 1602 patient with NAFLD, showed that exercise training caused a significant decrease in ALT enzyme [SMD=-0.73, (95% CI: -0.51 to -0.95), p=0.001], AST enzyme [SMD=-0.61, (95% CI: -0.39 to -0.83), p=0.001], GTT enzyme [SMD=-0.66, (95% CI: -0.18 to -1.14), p =0.007], and intrahepatic fat [SMD=-0.58, (95% CI: -0.78 to -0.38), p=0.001].
Conclusion: The findings of the present meta-analysis show the important role of exercise training (aerobic, resistance, and combined training) in improving liver function. So, all three types of aerobic, resistance, and combined exercise are suggested as a non-drug approach to reduce liver enzymes and intrahepatic fat for adults with NAFLD.

The Effect of High Intensity Training and Beetroot Consumption on NRF1 and TFAM in Visceral Adipose Tissue of Aged Type 2 Diabetic Rats

Masoumeh Hosseini

Background: NRF1 and TFAM are proteins that affect mitochondrial biogenesis and play an important role in diabetes. The aim of the present study was to investigate the effect of high intensity training (HIT) training and beetroot consumption on NRF1 and TFAM in visceral adipose tissue of aged type 2 diabetic rats.
Method: In this experimental study, 40 male rats (weight range 270-300 grams and age 12-14 weeks) diabetic with streptozotocin were randomly divided into 5 groups (healthy control, diabetic control, supplement, exercise, exercise + complement) were divided. The training groups were subjected to intense interval training with an intensity of 50 to 90% of the maximum speed for 4 weeks and 4 sessions each week and 44 minutes each session. The groups receiving the supplement received 10 mg of beetroot per kilogram of body weight daily for 4 weeks and 4 times a week orally. The data are statistically significant using two-way ANONA test and (P < 0.05) was evaluated.
Results: The results of the study showed that the induction of diabetes led to a significant decrease in the protein levels of NRF1 and TFAM, so that in the exercise group, beetroot had a significant effect on the changes of NRF1 in the visceral fat tissue of elderly rats with diabetes. (P=0.001), but the interaction of HIT training and beetroot supplement in NRF1 changes is not significant (P=0.56) and also the factor of exercise and beetroot supplement, as well as the interaction of HIT training and beetroot also has a significant effect on TFAM changes in visceral adipose tissue of elderly rats with diabetes. (P=0.001).
Conclusion: Based on the findings of the present research, it seems that high interval training with beetroot consumption can lead to an increase in NRF1 and TFAM gene expression and thus help to improve and control diabetes in the elderly.

Studying the Effect of Six Weeks of Aerobic Exercise on the Protein Levels of DCX and AMPA in the Hippocampus of Diabetic Rats

Vahid Valipour Dehnou

Background: One of the complications of type 2 diabetes is the development of neurocognitive disorders, and DCX and AMPA may be involved in this disorder. Therefore, this study aimed to investigate the effect of aerobic exercise on the DCX and AMPA in the hippocampus of rats with type 2 diabetes.
Methods: 32 eight-week-old male rats were divided into control (C), diabetes (D), diabetes-exercise (DT), and exercise (T) groups. Diabetes was induced by streptozotocin injection. The exercise was carried out for six weeks. Finally, the rats were dissected, and their hippocampus tissue was extracted. Proteins were measured by the ELISA method.
Results: There was nonsignificant difference between the DCX of the C group and the T and DT groups (p>0.05). But there was a significant difference between the DCX of the C and diabetic groups (p =0.05). Also, a significant difference was observed between the diabetic groups and the T group (p<0.05). AMPA in diabetic groups were significantly lower than in C and T groups (p<0.05) While the difference between C and T groups and D and DT groups was not significant (p>0.05). Also, a significant negative correlation was observed between AMPA and DCX with blood glucose.
Conclusion: Diabetes reduces the AMPA and DCX but exercise nonsignificantly reduces the effect of diabetes on those. According to the appropriate duration of exercise, there is a possibility that due to the significant negative correlation between these proteins and glucose, the intensity of exercise can significantly reduce the negative effect of diabetes on those.

Gene Expression Changes in Bax and Bcl2 and Their Ratio in Liver Tissue with High Intensity Training and Royal Jelly in Type 2 Diabetic Rats

Hossein Abednatanzi

Background: Type 2 diabetes is the most common endocrine disease that can cause tissue damage and apoptosis. The purpose of the present study was to study the changes in the expression of related liver apoptosis genes after High Intensity Training (HIT) and royal jelly in type 2 diabetic rats.
Methods: The statistical sample of the study was 36 male rats that became diabetic after 20 weeks of high-fat diet and injection of 25 ml/kg of STZ. Fasting glucose between 150 and 400 mg/dl was considered as the criteria for type 2 diabetes. Diabetic rats were placed in 4 groups: control, HIIT, Jelly, and HIIT-Jelly. The HIITprotocol was performed 8 weeks, 5 sessions / week with intense 2-minute intervals with 2-8 intervals and 80-90% vo2max and one-minute rest intervals with 50-56% vo2max and Royal Jelly gavage at 100 mg/kg for 5 days / week. Data analysis was done using one-way and two-factor analysis of variance and post hoc test.
Results: The results showed that compared to the control group, HIIT led to a significant decrease in glucose and insulin resistance index. Also, HIIT and royal jelly consumption led to a decrease in Bax gene expression and an increase in Bcl2 gen expression and a decrease in the Bax/Bcl2 ratio in liver cells compared to the control group (P<0.05).
Conclusion: HIIT with royal jelly in diabetic rats led to the reduction and improvement of glycemic index and insulin resistance and appropriate changes in the expression of liver apoptotic genes.

The Effect of Oral Administration of Recombinant Human Interleukin-2 on Molecular Markers of Diabetic Neuropathy in the Brain of Drosophila Melanogaster

Majid Hassanpourezatti

Background: In this study, the effect of oral administration of recombinant human interleukin-2 (rhIL-2) on brain NO level and AChE activity in hyperglycemic conditions induced by high-sucrose diet (HSD), as a type-2 diabetes model, was investigated in Drosophila melanogaster.
Methods: In this experimental research, adult fruit flies of both sexes (30 in each group) were divided into the six groups: receiving normal diet (ND); high-sucrose diet (HSD); ND with rhIL-2 at 0.01 and 0.1 ng/ml; and HSD with rhIL-2 at 0.01 and 0.1 ng/ml. Flies were bred on these culture media for three weeks. At the end of the experiments, the brains of the flies were extracted, homogenized, and glucose, NO, and AChE activity levels were measured by the kit.
Results: Glucose level, AChE activity and NO level increased in brain homogenate of HFD flies compared to ND group. The body weight of HSD flies was reduced compared to the ND. Administration of rhIL-2 along with HFD significantly prevented these changes.
Conclusion: These findings suggest that rhIL-2 partially prevents diabetic neuropathy in Drosophila. It seems that the preventive effects of this compound are mediated through mechanisms dependent on nitric oxide and acetylcholinesterase in the brain.

Modeling and Identification of Factors Affecting the Existence of Complications Caused by Diabetes with Data Mining Methods

Ehsan Mosa Farkhani

Background: In Iran, with the advancement of technology and the development of registration statistics, the need to use data mining methods has attracted more attention from researchers. Regression and classification tree is one of the important methods in Big data modeling, which has attracted the attention of many researchers for community control and prediction. The purpose of this study is to determine the influencing variables on the occurrence of complications caused by diabetes.
Methods: This paper is a cross sectional-analytical study. In this research, all diabetic patients covered by Mashhad University of Medical Sciences in 2017 were extracted from the SINA system. The number of diabetics with complications was 5016 and diabetics without complications were 53613. The method of fitting the regression tree model and classification and measurement criteria of the model is the coefficient of determination and the area of the Rock curve and the Lift diagram.
Results: The rock curve for the fitted tree model is 73.8%, which shows the relatively high power of the model. Based on the Lift chart, the decision-making power of diabetes complications increases 3.5 times for the person who comes to visit.
Conclusion: The results of the regression model and tree classification showed that, in descending order, age, risk assessment factor, FBS, HbA1C, total activity time, cholesterol, FBS and HDL, cardiovascular disease, history of stroke, blood pressure, cholesterol Statin prescription, job with hard physical activity, living area, consumed oil, walking, consumption of vegetables and gender are more effective than other factors in the occurrence of diabetes complications.