نوع مقاله : مقاله پژوهشی Released under (CC BY-NC 4.0) license I Open Access I
نویسندگان
1 گروه فیزیولوژی ورزشی، دانشکده علوم انسانی و اجتماعی، دانشگاه کردستان، سنندج، ایران.
2 گروه فیزیولوژی ورزشی، دانشکده علوم انسانی و اجتماعی، دانشگاه کردستان، کردستان، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Background& purpose: Excessive autophagy, together with inflammation, is a key pathological feature contributing to cardiac dysfunction in type 2 diabetes (T2D). This study aimed to investigate the effects of high-intensity interval training (HIIT) with vitamin D3 supplementation on inflammation and autophagy in heart tissue of T2D-induced rats. Methods: Forty male Wistar rats were induced to T2D through a combination of high-fat diet and low-dose streptozotocin (STZ) injection. After the induction of T2D, the animals were divided into four groups (N=8): Normal control, diabetes control, diabetes + HIIT, diabetes + vitamin D3 and diabetes + HIIT and vitamin D3. The HIIT protocol was performed for eight weeks, 3 sessions per week, with an intensity of 90-85% of maximum running speed through treadmill running. Vitamin D3 (0.25 mg.kg-1) was injected weekly. At the end of the intervention period, heart tissue was evaluated for the content of autophagy marker ULK-1, inflammatory markers NF-kB and interleukin-6 (IL-6), and serum glucose levels and insulin resistance index. Results: The results showed that T2D significantly increases the levels of ULK-1, NF-κB and IL-6 in heart tissue, which indicates excessive autophagy and inflammation (P=0.001). However, eight weeks of HIIT, with or without vitamin D3 supplementation, significantly reduced these markers (P=0.001). Notably, the combination of HIIT and vitamin D3 injection showed the greatest reduction in autophagy and inflammation markers. Also, these interventions improved serum glucose levels and insulin resistance (P=0.001). Conclusions: A combination of HIIT and vitamin D3 injection effectively reduces inflammation and excessive autophagy in cardiac tissue of T2D rats and suggests a potential therapeutic strategy to prevent cardiovascular complications in T2D patients.
کلیدواژهها [English]