اثر تمرینات تناوبی شدید بر سطوح فعال‌کنندة RNA گیرندة استروئیدی بافت چربی و شاخص مقاومت به انسولین در موش‌های صحرایی مبتلا به دیابت نوع دو

نوع مقاله : مقاله پژوهشی

نویسندگان

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

چکیده

زمینه و هدف: RNA گیرندة استروئیدی (SRA) از جمله RNAهای طویل رمزگذاری‌نشده است که در هومئوستاز گلوکز و مقاومت به انسولین نقشی دوگانه دارد. هدف از تحقیق حاضر بررسی اثر شش هفته تمرینات تناوبی شدید بر سطوح RNA گیرندۀ استروئیدی بافت چربی و شاخص مقاومت به انسولین در موش‌های صحرایی دیابتی‌شده با رژیم غذایی پرچرب و تزریق استرپتوزوتوسین بود.
مواد و روش‌ها: 20 سر موش صحرایی نر نژاد ویستار (10-12 هفته و با وزن 200-300 گرم) انتخاب شدند و دیابت نوع دو در پی شش هفته رژیم غذایی پرچرب و سپس تزریق استرپتوزوتوسین القا شد. آنگاه موش‌های صحرایی چاقِ دیابتی‌شده به شیوۀ تصادفی به دو گروه تجربی و کنترل تقسیم شدند. موش‌های صحرایی دیابتی در گروه تجربی در شش هفته تمرینات تناوبی شدیدِ دویدن روی نوار گردان با تکرارهای 40 ثانیه‌ای در سرعت 25-35 متر بر دقیقه با دو دقیقه استراحت فعال بین هر تکرار شامل دویدن در سرعت 10 متر در دقیقه، 30 دقیقه در هر جلسه و پنج جلسه در هفته شرکت کردند. همۀ موش‌های صحرایی 48 ساعت پس از آخرین جلسۀ تمرینی تشریح‌شده و سطوح SRA بافت چربی، سطوح سرمی انسولین و گلوکز ناشتای خون با استفاده از روش آزمایشگاهی مناسب ارزیابی شد. تجزیه‌وتحلیل داده‌ها با استفاده از آزمون تی مستقل و زوجی و آزمون همبستگی پیرسون در سطح معناداری کمتر از 05/0 انجام گرفت.
نتایج: اجرای شش هفته تمرینات تناوبی شدید ضمن کاهش معنادار SRA بافت چربی (001/0=P)، با کاهش معنادار در سطوح سرمی انسولین (001/0>P)، گلوکز ناشتای خون (001/0>P)، شاخص مقاومت به انسولین (001/0>P) و وزن بدن (028/0=P) در گروه تجربی در مقایسه با گروه کنترل همراه بود. افزون بر این، اجرای شش هفته تمرینات تناوبی شدید در گروه تجربی با کاهش معنادار وزن بدن در پس آزمون در مقایسه با پیش‌آزمون همراه بود (001/0>P). با این همه، بنابر یافته‌ها، همبستگی معنادار بین تغییرات سطوح SRA بافت چربی پس از شش هفته تمرینات تناوبی شدید با تغییرات هیچ‌کدام از شاخص‌های مورد بررسی مشاهده نشد (05/0<P).
نتیجه‌گیری: به‌نظر می‌رسد اجرای شش هفته تمرینات تناوبی شدید ضمن کاهش سطوح SRA در بهبود ترکیب بدن و مقاومت به انسولین نقش دارد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effect of high intensity interval training on adipose tissue levels of steroid receptor RNA activator and insulin resistance index in rats with type II diabetes

نویسندگان [English]

  • Aylin Jafarzade
  • Najme Rezaeian
Department of physical education, Bojnourd branch, Islamic Azad University, Bojnourd, Iran
چکیده [English]

Background and Purpose: Steroid receptor RNA activator (SRA) is one of the long non-coding RNA (LncRNA) playing a dual role in glucose homeostasis and insulin resistance. Purpose of this study was to investigate the effect of six weeks of high intensity interval training on adipose tissue levels of SRA and insulin resistance index in diabetic rats with high fat diet and streptozotocin.  Materials and Methods: Twenty male wistar rats (10-12 weeks old; 200-300 gr) were selected and type 2 diabetes was induced by six weeks of high-fat diet and streptozotocin injection. Afterwards, obese diabetic rats were randomly divided into experimental and control groups. The rats in the experimental group participated in six weeks of high intensity interval training included 40 seconds of running on a treadmill at 25-35 m/min followed by 2 minutes of active rest at 10 m/min, which was performed for 30 minutes per session, five sessions per week, 6 weeks. All rats were dissected 48 hours after the last training session and adipose levels of SRA, serum levels of insulin and fasting blood sugar were evaluated using appropriate laboratory methods. Data analyses were carried out using independent and paired t-test and Pearson's correlation test at a significance level of less than 0.05. Results: Six weeks of high intensity interval training resulted in significant decreases in adipose tissue levels of Steroid Receptor RNA Activator (P=0.001) in addition to significant decreases in levels of insulin (P<0.001), fasting blood glucose (P<0.001), insulin resistance index (P<0.001) and body weight (P=0.028) in the experimental group compared to the control group. Furthermore, six weeks of high intensity interval training in experimental group caused significant decreases in body weight in post- test compared to pre- test (P<0.001). However, according to the Pearson’s correlation test, there were no significant correlations between the changes in steroid receptor RNA activator levels of adipose tissue and changes in other variables following high intensity interval training (P>0.05) Conclusion: It seems that in addition to improving body composition, six weeks of high intensity interval training play a role in improving insulin resistance through decreasing the levels of SRA.
 

کلیدواژه‌ها [English]

  • Steroid Receptor RNA Activator (SRA)
  • High Intensity Interval Training
  • Diabetes
  • Insulin Resistance
  • Obesity
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  • تاریخ دریافت: 26 تیر 1402
  • تاریخ بازنگری: 03 آبان 1402
  • تاریخ پذیرش: 11 آبان 1402
  • تاریخ اولین انتشار: 01 آذر 1402
  • تاریخ انتشار: 01 بهمن 1402