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Effects of Eight Weeks of Aerobic Training on Expression Levels of the HMGB1-RAGE/TLR4-NF-kB Proinflammatory Pathway in Cardiac Tissue of Male Rats with Hyperglycemia
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Hamid Taghibeigi Hoseinabadi    , Fahimeh Esfarjani , Mohammad Marandi , Hadi Karami |
| University of Isfahan , f.esfarjani@spr.ui.ac.ir |
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Abstract: (5533 Views) |
Introduction: Inflammation plays a critical role in the pathogenesis of diabetic cardiomyopathy. The expression of HMGB1, a proinflammatory cytokine, and its downstream signaling pathway is upregulated in diabetes. The aim of this study was to investigate the effect of 8 weeks aerobic training on the expression levels of the HMGB1-RAGE/TLR4-NF-kB pathway in cardiac tissue of male rats with hyperglycemia. Materials and Methods: Thirty-six male Wistar rats (mean weight, 231±25g) were randomly divided into three groups (n=12 each): Healthy control, control hyperglycemia and trained hyperglycemia. Hyperglycemia was induced by intraperitoneal injection of streptozotocin and nicotinamide. Forty-eight hours after completion of the training program (eight weeks aerobic training), cardiac tissue was removed under sterile conditions. Gene expression of HMGB1, RAGE, TLR4 and NF-kB were investigated, using Real-time PCR. For data analysis, one-way ANOVA and post-hoc Tukey’s test were used, with P<0.05 considered statistically significant. Results: Gene expression levels of HMGB1, RAGE, TLR4 and NF-kB were significantly (P=0.001) increased in the cardiac tissue of the hyperglycemic control group, compared with healthy controls. Eight weeks of aerobic training decreased the expression levels of the studied genes (P=0.001). Conclusion: It seems that aerobic training can prevent the negative effects of hyperglycemia via by attenuating gene expression levels of HMGB1, RAGE, TLR4 and NF-kB in the cardiac tissue of rats with hyperglycemia, and could hence be an important mechanism for cardiac function and preventing diabetic cardiomyopathy.
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| Keywords: Aerobic Training, HMGB1, RAGE, TLR4 and NF-kB, Diabetic Cardiomyopathy, Hyperglycemia |
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Full-Text [PDF 481 kb]
(1909 Downloads)
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Type of Study: Original |
Subject:
Exercise
Received: 2018/10/6 | Accepted: 2019/01/8 | Published: 2019/02/15
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