تاثیر4 هفته تمرین تناوبی با شدت بالا بربیان ژن کانال کلسیمی گیرنده های رایانودین(RyR2) ، SERCA2a و فسفولامبان قلب رت های نر دیابتی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 . دانشجوی دکتری فیزیولوژی ورزشی، دانشکدۀ علوم ورزشی دانشگاه شهید چمران اهواز، اهواز، ایران

2 استاد دانشکدۀ تربیت بدنی و علوم ورزشی دانشگاه تهران، تهران، ایران

3 استادیار دانشکدۀ تربیت بدنی و علوم ورزشی دانشگاه الزهرا (س)، تهران، ایران

چکیده

هدف:هدف از این مطالعه تاثیر4 هفته تمرین تناوبی باشدت بالا بر بیان ژن کانال کلسیمی گیرنده‌های رایانودین(RyR2) ،SERCA2a و فسفولامبان قلب رت‌های نر دیابتی بود. روش شناسی: پژوهش حاضر از نوع تجربی و بدین منظور 24 سر رت نر نژاد ویستار به دو گروه کنترل بی تحرک و تناوبی با شدت بالا HIIT)) تقسیم شدند. به هر دو گروه از طریق تزریق درون صفاقی محلولSTZ دیابت القاء شد.24 ساعت پس از آخرین جلسه تمرین، رت‌ها تشریح شدند و بطن چپ استخراج گردید. برای بررسی میزان بیان ژن RyR2 ، SERCA2a و فسفولامبان از روش Real Time-PCR استفاده شد. جهت مقایسه دو گروه از آزمون t مستقل در سطح آلفای 05/0 استفاده شد. نتایج: در پایان، نتایج نشان داد 4 هفته تمرین تناوبی خیلی شدید، بیان ژن RyR2 در بطن چپ قلب گروه HIIT را در حد معناداری 03/0 P= افزایش داد و بیان ژن SERCA2a و فسفولامبان علی‌رغم افزایش، دارای تفاوت معناداری نبود. نتیجه گیری: بر اساس این یافته‌ها می‌توان نتیجه‌گیری کرد 4 هفته تمرین تناوبی با شدت بالا می تواند با افزایش بیان ژن RyR2 در قلب رت‌های دیابتی، بد تنظیمی های ایجاد شده در این دو پروتئین موثر در چرخه انقباض قلبی را جرح وتعدیل کند

کلیدواژه‌ها


عنوان مقاله [English]

Effect of 4 weeks high intensity interval training on gene expression of Ryanodine receptor calcium channels (RyR2), SERCA2a and Phospholamban in diabetic rat’s heart

نویسندگان [English]

  • Mohammad Reza Izadi 1
  • Abbas Ali Gaeini 2
  • Ali Asghar Ravasi 2
  • Maryam Delfan 3
1 . Ph.D. Student of Exercise Physiology, Faculty of Sport Sciences, Shahid Chamran University of Ahvaz, Ahvaz, Iran
2 Professor, Faculty of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran
3 Assistant Professor, Faculty of Physical Education and Sport Sciences, Alzahra University, Tehran, Iran
چکیده [English]

Diabetic cardiomyopathy (DCM) is one of the most important complications of diabetes and is one of the major causes of death in diabetic patients. DCM at the molecular level is rooted in down regulation of expression or activity of those various proteins involved in maintenance or regulation of intracellular calcium homeostasis. The aim of this study was to investigate the effect of 4 weeks of high intensity interval training (HIIT) on gene expression of calcium channel of ryanodine receptors (RyR2), SERCA2a and phospholamban (PLB) in the heart of diabetic male rats. In this experimental study, 24 male Wistar rats were divided into two groups: sedentary control and HIIT. Diabetes was induced in both groups by intraperitoneal injection of Streptozotocin (STZ) solution. 24 hours after the last training session, the rats were euthanized and their left ventricle was extracted. Real Time-PCR technique was used to determine the gene expression of RyR2, SERCA2a and PLB. To compare the two groups, independent t test was used at alpha level of 0.05. The results revealed that 4 weeks of HIIT significantly increased gene expression of RyR2 in the left ventricle of the heart of HIIT group (P=0.03). Although gene expression of SERCA2a and phospholamban increased, they were not significantly different. Based on these findings, it can be concluded that 4 weeks of HIIT could prevent and  minimize the maladjustments in these 2 proteins affecting cycle of cardiac contraction and reduce the risk of diabetic cardiomyopathy through increased RyR2 gene expression in the heart of diabetic rats.

کلیدواژه‌ها [English]

  • Diabetic cardiomyopathy
  • RyR2
  • SERCA2a
  • PLB

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