تاثیر شش هفته تمرین مقاومتی بر عامل رشد اندوتلیال عروقی و عامل نوروتروفیک مشتق از عصب بافت قلبی در رت‌های نر چاق
محورهای موضوعی : فصلنامه زیست شناسی جانوری
ندا قاسمی
1
(گروه تربیت بدنی و علوم ورزشی، واحد بروجرد، دانشگاه آزاد اسلامی، بروجرد، ایران)
مانیا روزبیانی
2
(گروه تربیت بدنی و علوم ورزشی، واحد بروجرد، دانشگاه آزاد اسلامی، بروجرد، ایران)
حسین شیروانی
3
(مرکز تحقیقات فیزیولوژی ورزشی، پژوهشکده سبک زندگی، دانشگاه علوم پزشکی بقیه‌الله (عج)، تهران، ایران)
کلید واژه: چاقی, تمرین مقاومتی, رگزایی, عامل رشد اندوتلیال عروقی, عامل نوروتروفیک مشتق از عصب,
چکیده مقاله :
پدیده رگ زایی در شرایط پاتوفیزیولوژیکی مانند چاقی و شرایط فیزیولوژیکی مانند فعالیت ورزشی، اثرات متفاوتی را بر بدن دارد. هدف از مطالعه حاضر، بررسی اثر شش هفته تمرین مقاومتی بر عامل رشد اندوتلیال عروقی (VEGF) و عامل نوروتروفیک مشتق از عصب (NDNF) در رت‌های نر چاق بود. در یک مطالعه تجربی، تعداد 20 سر رت نر نژاد ویستار با سن پنج هفته و وزن تقریبی 120 تا 160 گرم، بر اساس همگن سازی وزنی به دو گروه مساوی کنترل و تجربی تقسیم شدند. گروه تجربی پروتکل تمرینی به مدت شش هفته، سه جلسه در هفته و هر جلسه شامل یک نوبت 10 تکراری با تناوب استراحتی 90 ثانیه ای، بالارفتن از نردبان تمرینات مقاومتی به ارتفاع یک متر و شیب 85 درجه همراه با وزنه متصل به قاعده دم (با توجه به حداکثر ظرفیت حمل وزنه هر رت) را انجام دادند. 48 ساعت پس از آخرین جلسه تمرین، رت‌ها کشته شده و خونگیری از قلب انجام گردید. مقادیر VEGF و NDNF در بافت قلب با استفاده از روش الایزا ارزیابی گردید. به منظور بررسی تغییرات بین گروهی از آزمون t مستقل و در سطح معناداری 05/0 >p استفاده شد. نتایج نشان داد شش هفته مداخله تمرین مقاومتی منجر به افزایش معنادار در مقادیر VEGF و کاهش معنادار NDNF در گروه تجربی نسبت به گروه کنترل گردید. بر اساس یافته های این مطالعه، به نظر می رسد تمرین مقاومتی می تواند با افزایش برخی عوامل محافظتی و کاهش عوامل بازدارنده آنژیوژنز، اثرات مثبتی بر پیشگیری از خطر بروز بیماری های قلبی عروقی ناشی از چاقی، به دنبال داشته باشد.
The phenomenon of angiogenesis in pathophysiological conditions such as obesity and physiological conditions such as exercise have different effects on the body. The aim of this investigation was to study the effect of six weeks of resistance training on Vascular endothelial growth factor and Neuron Derived Neurotrophic Factor in obese male rats. In an experimental study, 20 male wistar rats aged five weeks and weight approximately 120 to 160 grams, were divided into two equal groups, control and experimental, based on weight homogenization. The experimental group performed a training protocol for six weeks, three sessions per week, and each session includes one set of 10 repetitions with a 90-second rest interval, including of climbing a resistance training ladder at a height of one meter and an incline of 85 degrees with a weight attached to the base of the tail (with Paying attention to the maximum weight carrying capacity of each rat. 48 hours after the last training session, the rats were sacrificed and blood was taken from the heart. The values of VEGF and NDNF in the heart tissue were evaluated with ELISA method. In order to examine the changes of between groups, the independent t-test was used at a significance level of p<0.05. The results indicated that six weeks of resistance training led to a significant increase in VEGF values (p=0.0001) and a significant decrease in NDNF values (p=0.0001) in experimental group in comparison to the control group. Base on the findings of this study, it seems that resistance training can have positive effects on preventing the risk of cardiovascular diseases caused by obesity, by increasing some protective factors and reducing angiogenesis inhibitory factors.
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