1- Department of Sport Sciences, School of Humanities, University of Hormozgan, Bandar Abbas, Iran
2- Department of Exercise Physical Education, Farhangian University, Tehran, Iran ,a.rajabi@cfu.ac.ir
3- Department of Exercise Physiology, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
2- Department of Exercise Physical Education, Farhangian University, Tehran, Iran ,
3- Department of Exercise Physiology, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
Abstract: (19 Views)
Background: MuRF1 and Atrogin-1 are two key genes involved in the muscle atrophy pathway and are upregulated in diabetes, particularly under conditions of insulin resistance and inflammation, leading to increased degradation of muscle proteins and reduced muscle mass. Therefore, this study aimed to investigate changes in MuRF1 and Atrogin-1 gene expression in the soleus muscle of obese diabetic rats following 8 weeks of high-intensity interval training (HIIT) combined with quercetin supplementation.
Methods: In this experimental study, 25 adult male rats (age= 12 weeks old and weight= 180-200 gr) were purchased and randomly assigned to five groups: healthy control (HC, n= 5), diabetes control (DC, n= 5), quercetin control (QC, n= 5), HIIT (HIIT, n= 5), and HIIT with quercetin (QHIIT, n= 5). Eight weeks of HIIT training was performed. Type 2 diabetes (T2DM) was induced in the rats using STZ and 8 weeks of a high-fat diet. Quercetin was injected for 8 weeks in the supplementation groups. One-way analysis of variance with Tukey's post-hoc test (with a significance level of P-Value<0.05) was used to analyze the data.
Results: The results showed that after T2DM induction, blood glucose and MuRF1 and Atrogin-1 gene expression levels in the soleus muscle of rats significantly increased (P-Value <0.001). After eight weeks of training and supplementation interventions, blood glucose significantly decreased in all intervention groups (P-Value =0.001), and only in the HIIT with quercetin supplementation group was there a significant decrease in both MuRF1 and Atrogin-1 gene expression (P-Value =0.001).
Conclusion: HIIT and quercetin supplementation alone reduced blood glucose levels in diabetic rats. Although HIIT and quercetin supplementation alone did not affect MuRF1 and Atrogin-1 gene expression, the combination of both interventions resulted in significant changes. This suggests that the combined use of HIIT exercise and quercetin supplementation has a notable effect on selected factors related to atrophy in diabetic rats.
Methods: In this experimental study, 25 adult male rats (age= 12 weeks old and weight= 180-200 gr) were purchased and randomly assigned to five groups: healthy control (HC, n= 5), diabetes control (DC, n= 5), quercetin control (QC, n= 5), HIIT (HIIT, n= 5), and HIIT with quercetin (QHIIT, n= 5). Eight weeks of HIIT training was performed. Type 2 diabetes (T2DM) was induced in the rats using STZ and 8 weeks of a high-fat diet. Quercetin was injected for 8 weeks in the supplementation groups. One-way analysis of variance with Tukey's post-hoc test (with a significance level of P-Value<0.05) was used to analyze the data.
Results: The results showed that after T2DM induction, blood glucose and MuRF1 and Atrogin-1 gene expression levels in the soleus muscle of rats significantly increased (P-Value <0.001). After eight weeks of training and supplementation interventions, blood glucose significantly decreased in all intervention groups (P-Value =0.001), and only in the HIIT with quercetin supplementation group was there a significant decrease in both MuRF1 and Atrogin-1 gene expression (P-Value =0.001).
Conclusion: HIIT and quercetin supplementation alone reduced blood glucose levels in diabetic rats. Although HIIT and quercetin supplementation alone did not affect MuRF1 and Atrogin-1 gene expression, the combination of both interventions resulted in significant changes. This suggests that the combined use of HIIT exercise and quercetin supplementation has a notable effect on selected factors related to atrophy in diabetic rats.
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