تأثیر تمرین تناوبی شدید بر بیومارکرهای اتوفاژی عضله اسکلتی در موش های نر سالمند

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه تربیت بدنی و علوم ورزشی، واحد بجنورد، دانشگاه آزاد اسلامی، بجنورد، ایران

چکیده

مقدمه و هدف: اتوفاژی نقش مهمی در فرایند سالمندی ایفا می کند. تمرینات ورزشی به عنوان یکی از مهم ترین تعدیل کننده های سالمندی شناخته شده اند، با این حال آثار تمرینات تناوبی شدید (HIIT) بر شاخص های اتوفاژی کمتر شناخته شده است. از این رو، هدف پژوهش حاضر بررسی اثر HIIT بر مقادیر پروتئینی سیسترین 2، AMPK، beclin1 و ULK1 در عضله اسکلتی موش‌های نر سالمند بود.
مواد و روش ها: 20 سر موش نر سالمند نژاد ویستار (18 ماهه) به‌طور تصادفی به دو گروه تجربی و کنترل تقسیم شدند. پس از برآورد حداکثر سرعت، موش ها در گروه‌ تجربی در هشت هفته تمرینات تناوبی شدید دویدن روی تردمیل (8-5 مرحله فعالیت 2 دقیقه‌ای با شدت معادل 80 تا 100 درصد اکسیژن مصرفی بیشینه و با دوره‌های استراحتی فعال 2 دقیقه‌ای با شدت معادل 50 درصد اکسیژن مصرفی بیشینه)، 5 جلسه در هفته شرکت کردند. نمونه های بافت عضله دوقلو جهت اندازه گیری سطوح پروتئینی شاخص های مورد بررسی 48 ساعت پس از آخرین جلسه تمرین استخراج شد. جهت تجزیه وتحلیل داده ها از آزمون تی مستقل در سطح معنی دار 05/0>P استفاده شد.
نتایج: نتایج حاصل از آزمون تی مستقل نشان داد که اجرای هشت هفته HIIT با افزایش معنی دار مقادیر پروتئینی سیسترین 2 (01/0P=)، AMPK فسفریله (005/0P=)، beclin1 (001/0P=) و ULK1 (03/0P=) در گروه HIIT در مقایسه با گروه کنترل همراه بود.
نتیجه‌گیری: به نظر می رسد HIIT می تواند به واسطه تأثیر بر مسیر سیسترین-2/ AMPK، نقش تنظیمی در اتوفاژی داشته باشد و پیشرفت تغییرات همراه با سالمندی در عضله اسکلتی موش های سالمند را تعدیل کند.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of high intensity interval training on skeletal muscle autophagy biomarkers in male elderly rats

نویسندگان [English]

  • Saghar delshad
  • Ali yaghoubi
  • Najme rezaeian
Department of Physical Education and Sport Science, Bojnourd Branch, Islamic Azad University, Bojnourd, Iran
چکیده [English]

Background and Objective: Autophagy plays an important role in the aging process. Exercise is known to be one of the most important modulators of aging; however, the effects of high-intensity interval training (HIIT) on autophagy are not well known. Therefore, this study aimed to investigate the effect of HIIT on protein levels of sestrin 2, AMPK, beclin1 and ULK1 in skeletal muscle of elderly rats.
Materials and Methods: Twenty-old male Wistar rats (18 months) were randomly divided into experimental and control groups. After estimating the maximum speed, rats in the experimental group participated in 8 weeks of high-intensity interval training of running on the treadmill (5-8 sets of running for 2 minutes at an intensity of 80-100 VO2Max with rest intervals of running for 2 minutes at an intensity of 50 VO2Max) five sessions per week. Skeletal muscle tissue samples were extracted 48 hours after the last training session to measure protein levels of factors assessed. An independent t-test was used to analyze the data and p < 0.05 was considered significant.
Results: HIIT resulted in a significant increase in protein levels of sestrin 2 (P=0.01), p-AMPK (P=0.005), beclin1 (P=0.001), and ULK1 (P=0.03) in the experimental group compared to control one.
Conclusion: It seems that HIIT can play a regulatory role in autophagy through the sestrin 2 / AMPK pathway and modulate subsequent progression of changes associated with aging in the skeletal muscle of elderly rats.

کلیدواژه‌ها [English]

  • High Intensity
  • Interval training
  • Autophagy
  • Sestrin 2
  • elderly rat
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