اثر چهار هفته تمرین مقاومتی برسطوح پروتئین ABCA1 کبدی و سطوح HDL-C پلاسمایی موشهای نر ویستار

نوع مقاله: مقاله پژوهشی

نویسندگان

دانشجوی دکتری فیزیولوژی ورزشی، دانشکده تربیت بدنی و علوم ورزشی، دانشگاه تهران، تهران، ایران.

چکیده

ABCA1 عضوی از خانواده ناقل‌های‌ غشایی ABC در پستانداران است که نقشی اساسی در نوآراییHDL-C و پیشگیری از بیماری آترواسکلروزیس (تصلب شرائین) دارد. هدف از پژوهش بررسی تغییرات ABCA1 کبدی و سطوح پلاسمایی HDL-C موشهای نرویستار به دنبال چهار هفته تمرین مقاومتی است. 16 موش صحرایی نر ویستار 14-12 هفته‌ای با میانگین وزن290 گرم در دو گروه کنترل (8n=) و تمرین (8n=) در این پژوهش مورد استفاده قرار گرفت. تمرین مقاومتی شامل بالا رفتن از یک نردبان یک متری به همراه وزنه بسته شده به دم حیوانات بود. موش ها 48 ساعت بعد از آخرین جلسه تمرینی قربانی شدند. بافت کبد نمونه برداری شده فورا پس از شستشو با سرم فیزیولوژیک توسط نیتروژن مایع فریز، و به یخچال بادمای C 70- انتقال یافت. پلاسما نیز جهت اندازهگیری HDL وapoA-I (آپولیپوپروتئین اصلی HDL) از نمونه خونی که بطورمستقیم از قلب گرفته شده بود، جداسازی گردید. برای بررسی میزان پروتئین ABCA1و apoA-I ازکیت الایزا و برای انداره گیری سطح HDL از روش ایمنی آنزیمی استفاده شد. نتیجه نشان داد که میزان ABCA1در کبد موش‌های تمرین کرده حدود 25درصد بالاتر از گروه کنترل بود، اما این اختلاف از نظر آماری معنی‌دار نبود. بعلاوه سطوح HDL وapoA-I با وجود مقداری افزایش از نظر آماری معنا دار نبودند. با وجود چهار هفته‌ تمرین مقاومتی از نظر آماری تغییر معنی‌داری در فاکتور‌های اصلی ایجاد نشد، اما با توجه به روند داده‌ها به نظر می‌رسد این پروتکل تمرین تاحدودی موثر بوده‌است. احتمالا با افزایش شدت و طول تمرینات و یا طراحی تمرینات ترکیبی نتایج بهتری حاصل گردد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

The Effect of 4 week resistance training on male rat hepatic ABCA1 protein plasma HDL-C levels

نویسندگان [English]

  • leila ganjkhani
  • ali osali
PhD student of Exercise Physiology, Faculty of Physical education and Sport Sciences, Tehran University, Tehran, Iran.
چکیده [English]

ABCA1, a member of ABC (ATP-binding cassette transporters) family in mammals plays a fundamental role in HDL-C remodeling and thus prevent atherosclerosis. The purpose of this study was to investigate the changes of hepatic ABCA1 and plasma of HDL-C levels of male Wistar rats following four weeks of resistance training. 16 male Wistar rats with the age of 12-14 weeks and a mean body weight of 290± 10g were used. Rats were divided in Two groups of control (n=8) and exercise (n=8). Resistance training consisted of climbing a one meter ladder (26 stairs and 80 degree angle with the ground) with weights tied to the tail of the animal. ELISA kit was used to evaluate the amount of ABCA1 and apoA-I and Plasma HDL level was determined by enzymatic immune method. For data analysis, independent T test was used. The resultes showed that ABCA1 in the liver of rats was higher for about 25 percent higher than the control group, but was not statistically significant. Plasma HDL levels were not significantly different between two groups. Moreover, despite some increases in apoA-I levels they were not statistically significant. Thus, despite the fact that four weeks of resistance training didn’t make statistically significant changes in ABCA1 and HDL and apoA-I, but according to the trend of the data this resistance training protocol seemed to be partly effective Possibly, better results can be achieved by increasing the intensity and leng of the the execises, or by designing a beter combination of exercises.

کلیدواژه‌ها [English]

  • ABCA1
  • resistance training
  • HDL-C and apoA-I
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