تأثیر هشت هفته تمرین مقاومتی بر گیرنده‌ی کینازی سرین/ترائونین نوع 2 بتا و سطوح پلاسمایی عامل متمایز کننده‌ی رشد 11 و 8 در هایپرتروفی فیزیولوژیک قلب Ratهای نر نژاد Wistar

نوع مقاله : مقاله های پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه علوم ورزشی، دانشکده‌ی ادبیات و علوم انسانی، دانشگاه شهرکرد، شهرکرد، ایران

2 دانشیار، گروه علوم ورزشی، دانشکده‌ی ادبیات و علوم انسانی، دانشگاه شهرکرد، شهرکرد، ایران

3 دانشیار، گروه پاتولوژی، دانشکده‌ی پزشکی، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران

چکیده

مقدمه: تمرینات ورزشی از طریق تغییر غلظت عوامل رشدی و گیرنده‌های آن‌ها می‌تواند بر هایپرتروفی فیزیولوژیک قلب (که برای عملکرد قلب مطلوب است) تأثیر داشته باشد. هدف از انجام این مطالعه، بررسی تأثیر هشت هفته تمرین مقاومتی بر گیرنده‌ی کینازی سرین/ترائونین نوع 2 بتا (ActRIIB) و سطوح پلاسمایی عامل متمایز کننده‌ی رشد 11 (Growth differentiation factor 11 یا GDF11) و عامل متمایز کننده‌ی رشد 8 (GDF8) در هایپرتروفی فیزیولوژیک قلب RATهای نر نژاد Wistar بود.روش‌ها: تعداد 14 سر موش صحرایی Wistar نر 3 ماهه پس از طی دوره‌ی آشناسازی، به صورت تصادفی به 2 گروه 7تایی شاهد و مورد تقسیم شدند. تمرین مقاومتی شامل هشت هفته و هفته‌ای 5 جلسه صعود از یک نردبان 1 متری بود. GDF11 و GDF8 پلاسما به روش Enzyme-linked immunosorbent assay (ELISA) و ActRIIB بافت بطن چپ به روش Immunohistochemistry (IHC) اندازه‌گیری شد. داده‌‌ها با استفاده از آزمون‌های Independent t و Mann-Whitney تجزیه و تحلیل شدند. 050/0 > P به عنوان سطح معنی‌داری در نظر گرفته شد.یافته‌ها: مقایسه‌ی بین گروهی، اختلاف معنی‌داری بین گروه‌‌های مورد و شاهد در متغیرهای وزن قلب (004/0 = P)، نسبت وزن قلب به وزن بدن (045/0 = P)، سطوح پلاسمایی GDF11 (001/0 = P) و GDF11/GDF8 (015/0 = P) نشان داد، اما اختلاف معنی‌داری در متغیرهای ActRIIB (768/0 = P) و GDF8 (295/0 = P) مشاهده نشد.نتیجه‌گیری: با توجه به نتایج تحقیق حاضر، به نظر می‌رسد تمرین‌های مقاومتی با اثرات مطلوب بر عوامل رشدی یک راهبرد مهم در جهت هایپرتروفی فیزیولوژیک قلبی باشد.

کلیدواژه‌ها


عنوان مقاله [English]

The Effect of Eight Weeks of Resistance Training on Activin Receptor type II-B and Plasma Levels of Growth Differentiation Factor 11 and 8 in Cardiac Physiological Hypertrophy in Male Wistar Rats

نویسندگان [English]

  • Behnam Masoudian 1
  • Akbar Azamian-Jazi 2
  • Mohammad Faramarzi 2
  • Ardeshir Talebi 3
1 PhD Student, Department of Sport Sciences, School of Literature and Humanities, Shahrekord University, Shahrekord, Iran
2 Associate Professor, Department of Sport Sciences, School of Literature and Humanities, Shahrekord University, Shahrekord, Iran
3 Associate Professor, Department of Pathology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
چکیده [English]

Background: Exercise training can be effective on cardiac physiological hypertrophy (that is favorable for cardiac function) by changing the concentration of growth factors and their receptors. The aim of this study was to determine the effects of eight weeks of resistance training on activin receptor type II-B (ActRIIβ), as well as plasma levels of growth differentiation factor 11 (GDF11) and growth differentiation factor 8 (GDF8) in cardiac physiological hypertrophy in male Wistar rats.Methods: After the familiarization period, fourteen 3-month-old male Wistar rats were randomly divided into control and training groups (n= 7). Resistance training included 8 weeks and 5 sessions per week climbing from a 1-meter ladder. GDF11 and GDF8 of plasma were measured using enzyme-linked immunosorbent assay (ELISA) method, and ActRIIB of left ventricular myocardium was measured using immunohistochemistry (IHC) method. Data were analyzed using independent t test and Mann-Whitney U at the significance level of P < 0.050.Findings: There was a significant difference between the training and control groups in heart weight (P = 0.004), heart weight/body weight (P =0.045), GDF11 (P = 0.001), and GDF8/GDF11 (P = 0.015). There was not any significant differences between the training and control groups in ActRIIβ (P = 0.768) and GDF8 (P = 0.295) levels.Conclusion: According to the results of the present study, it seems that resistance training with favorable effects on growth factors is an important strategy in cardiac physiological hypertrophy.

کلیدواژه‌ها [English]

  • Resistance Training
  • Activin receptor type II-B
  • Growth-differentiation factor 11
  • Growth differentiation factor 8
  • Cardiac hypertrophy
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