نوع مقاله : علمی - پژوهشی

نویسندگان

1 گروه تربیت بدنی و علوم ورزشی، دانشگاه پیام نور، البرز، ایران

2 گروه فیزیولوژی ورزش، دانشگاه پیام نور، تهران، ایران

3 پژوهشگاه تربیت بدنی و علوم ورزشی، تهران، ایران

4 گروه فیزیولوژی ورزش ، دانشگاه پیام نور، تهران، ایران

5 گروه تربیت بدنی و علوم ورزشی، دانشگاه آزاد اسلامی واحد کرج، البرز، ایران

چکیده

زمینه و هدف: از مهم‌ترین روش‌های مقابله با اختلال متابولیک چاقی، انجام فعالیت‌های ورزشی است که هم به‌عنوان پیشگیری و هم درمان مؤثر است. از آنجا که بیان ژن‌های آدیپوژنیکی مانند پروتئین رتینوبلاستوما 1 (RB1) و شبه‌رتینوبلاستوما-1 (RBL-1) در آدیپوژنز مؤثر است، ازاین‌رو هدف این پژوهش بررسی تأثیر شیوه‌های مختلف تمرین هوازی بر بیان ژن‌های RB1 و RBL-1 در بافت چربی زیر جلدی موش‌های صحرایی نر ویستار بود.
مواد و روش‌ها: در این پژوهش تجربی، ۳۲ سر موش صحرایی نر ویستار (هشت‌هفته‌ای و با وزن 33 ± 237 گرم) به‌صورت تصادفی به چهار گروه مساوی کنترل، تمرین پرشدت (HIT)، تمرین با شدت متوسط (MIT) و تمرین تناوبی پرشدت (HIIT) تقسیم شدند. شیوة اجرای تمرینات روی نوار گردان شامل هشت هفته بود، به‌طوری‌که تمرین HIT شامل دویدن با سرعت ۲۰ متر بر دقیقه یا با شدت 65 درصد اکسیژن مصرفی بیشینه (VO2max )، با شیب فزایندة تدریجی به مدت 30 دقیقه بود. تمرین MIT شامل دویدن با شدت 65 درصد VO2max به مدت 37 دقیقه بود و تمرین HIIT شامل چهار وهله تناوب شدید با زمان ۴ دقیقه دویدن با شدت ۹۰ تا ۱۰۰ درصد VO2max و چهار وهله تناوب کم شدت با زمان 3 دقیقه با ۵۰ تا ۶۰ درصد VO2max (در مجموع ۲۸ دقیقه) بود. 24 ساعت پس از آخرین جلسة تمرین حیوانات قربانی شده و بافت چربی زیرجلدی آنها برداشته شد و با روش RT-PCR اندازه‌گیری بیان ژن‌ها صورت گرفت. داده‌های به‌دست‌آمده با توجه به عدم توزیع طبیعی با استفاده از آزمون کروسکال والیس و آزمون تعقیبی بنفرونی از طریق نرم‌افزار آماری SPSS نسخة 24 تجزیه‌وتحلیل شد و سطح معناداری 05/0P<  در نظر گرفته شد.
نتایج: یافته‌های تحقیق حاضر نشان داد که میزان بیان ژن RB1 تنها در گروه تمرین MIT نسبت به گروه کنترل کاهش معناداری یافت (027/0P=). همچنین بیان ژن RBL-1 فقط در گروه تمرین HIT نسبت به گروه کنترل به‌طور معناداری کمتر بود (028/0P=).
نتیجه‌گیری: از آنجا که در این پژوهش فقط تمرینات هوازی MIT و HIT با شدت 65 درصد VO2max توانست بیان ژن‌های RB1 و RBL-1 را کاهش دهد، استفاده از این نوع تمرینات در جهت بهبود اختلالات متابولیکی و مهار آدیپوژنز پیشنهاد می‌شود.

کلیدواژه‌ها

عنوان مقاله [English]

Comparison the Influence of Various Intensities of Aerobic Training on the Expression of RBL-1 and RB1 Genes in the Subcutaneous Adipose Tissue of Male Wistar Rats

نویسندگان [English]

  • Maryam Shavandi 1
  • Saeid Naghibi 2
  • Mohammad Shariatzadeh Joneydi 3
  • Maryam Vatandoust 4
  • Ali Zare 5

1 Department of Physical Education, Payame Noor University, Alborz, Iran

2 Department of Physical Education and Sport Sciences, Payame Noor University (PNU), Tehran, Iran

3 Institute of Physical Education and Sport Sciences, Tehran, Iran

4 Department of Physical Education and Sport Sciences, Payame Noor University (PNU), Tehran, Iran

5 Department of Physical Education, Islamic Azad University of Karaj, Alborz, Iran

چکیده [English]

Background and Purpose: One of the most important methods to cope with obesity metabolic disorder is to do exercise activities that are both effective as a prevention and treatment. Since the expression of adipogenic genes such as Retinoblastoma-1 (RB1) and Retinoblastoma like-1 (RBL-1) proteins are effective in adipogenesis, the aim of this study was to investigate the influence of various intensities of aerobic training on the expression of RB1 and RBL-1 genes in the subcutaneous adipose tissue of male Wistar rats.
Materials and Methods: In this experimental study, 32 male Wistar rats (eight weeks old and weight: 237 ± 33 grams) were randomly divided into four equal groups: control, high intensity training (HIT), Moderate-intensity training (MIT) and high-intensity interval training (HIIT). The treadmill training protocols consisted of eight weeks, so that the HIT training consisted of running at a speed of 20 meters per minute or with an intensity of 65% of maximum oxygen consumption (VO2max), with a gradual increasing slope for 30 minutes. MIT training consisted of running at 65% VO2max for 37 minutes and HIIT training consisting of four bouts of high-intensity intervals with four minutes running at 90 to 100% VO2max and four bouts of low-intensity intervals with three minutes running at 50 to 60% VO2max (28 minutes in total). 24 hours after the last training session, the animals were sacrificed and their subcutaneous fat tissue was removed and gene expression was measured by RT-PCR. The obtained data were analyzed due to lack of natural distribution using Kruskal-wallis test and Bonferoni post hoc test through SPSS statistical software version 24 And significance level was considered P < 0.05.
Results: The results of the present study showed that the expression of RB1 gene was significantly reduced only in the MIT group compared to the control group (P = 0.027). Also, RBL-1 gene expression was significantly lower only in the HIT group than in the control group (P = 0.028).
Conclusion: Since in this study only MIT and HIT aerobic exercises with 65% VO2max intensity could reduce the expression of RB1 and RBL-1 genes, the use of this type of exercise to improve metabolic disorders and inhibit adipogenesis is recommended.

کلیدواژه‌ها [English]

  • Aerobic training
  • Subcutaneous Fat
  • Retinoblastoma Protein
  • Obesity
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