تأثیر 4 هفته تمرین هوازی بر سطوح Trk-B ، PKC و AKT در هیپوکمپ رتهای نر مبتلا به بیماری آلزایمر

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکترای فیزولوژی ورزشی پردیس بین الملی دانشگاه تهران واحد کیش

2 استاد، گروه فیزیولوژی ورزشی، دانشکدۀ تربیت‌بدنی و علوم ورزشی، دانشگاه تهران، تهران

3 دانشیار فیزیولوژی ورزشی پردیس بین الملی دانشگاه تهران واحد کیش

چکیده

واکنشهای تخریبی ناشی از AB در CNS منجر به اختلال فاکتورهای نوروتروفیک می شود که ممکن است به نوبه خود توسعه پاتولوژی آمیلوئید را تسهیل کند. اخیراً آثار ورزش بر این عوامل مورد توجه قرار گرفته است، با اینحال درک چگونگی اثر آن نیاز به بررسی بیشتر دارد. بنابراین هدف از پژوهش حاضر بررسی اثر تمرین هوازی بر سطوح Trk-B، PKC و AKT در هیپوکمپ رتهای نر نژاد ویستار به دنبال القای آلزایمر بود. در این مطالعه تجربی 36 سر رت نر بالغ 8 هفتهای با میانگین وزنی 20 ± 195 گرم به صورت تصادفی به 3 گروه آلزایمر، آلزایمر + ورزش و کنترل تقسیم شدند. القای آلزایمر از طریق تزریق درون هیپوکمپی Aβ1-42 صورت پذیرفت. تمرین هوازی به مدت 4 هفته، 5 جلسه در هفته انجام شد. 24 ساعت پس از آخرین جلسه تمرینی حیوانات یا تحت آزمون رفتاری قرار گرفتند و یا کشته شده و هیپوکمپ آنها جهت انجام آزمایشهای بعدی استخراج شد. از آزمون تحلیل واریانس یکراهه برای تجزیه و تحلیل دادهها استفاده شد. نتایج نشان داد رتهای گروه تمرین هوازی به طور معنیداری مدت زمان بیشتری را در ربع دایره هدف در مقایسه با گروه آلزایمری در آزمون پروب سپری میکنند (05/0 ≥ p). همچنین، سطوح Trk-B، PKC و AKT به دنبال تزریق Aβ1-42 کاهش مییابد (001/0 ≥ p). تمرین هوازی موجب افزایش سطوح Trk-B، PKC و AKT در مقایسه با رتهای آلزایمری شد (05/0 ≥ p). بنابراین، به نظر میرسد تمرین هوازی از طریق فعالسازی مسیر پیامرسانی AKT-PKC- TrkB به بهبود حافظه فضایی کمک کند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effect of 4 weeks aerobic training on Trk-B, PKC and AKT in hippocampus of male rats with Alzheimer’s Disease

نویسندگان [English]

  • aslan khodamoradi 1
  • mohammadreza kordi 2
  • Reza nori 3
1 . PhD Student of Sports Physiology, Kish International Campus, University of Tehran
2 Professor of Sports Physiology, University of Tehran
3 Associate Professor of Sports Physiology, Kish International Campus, University of Tehran
چکیده [English]

Alzheimer's disease is a progressive disorder of the nervous system. Aβ-induced degradation reactions in the CNS result in neurotrophic factor abnormalities, which may in turn facilitate the development of amyloid pathology. The effects of exercise on these factors have been taken into account, however, an understanding of how it works needs further investigation. Therefore, the purpose of this study was to investigate the effect of aerobic training on Trk-B, PKC and AKT in hippocampus of male rats with Alzheimer’s Disease. In this experimental study, 36 adult male rats (8 weeks) with an average weight of 195 ± 20 g were randomly divided into 3 groups: Alzheimer's Disease (AD), Alzheimer's Disease + exercise training (ADT), and control (C). The induction of Alzheimer's disease was induced by intrahippocampal injection of Aβ1-42. Aerobic exercise was performed for 4 weeks, 5 sessions per week. 24 hours after the last training session, animals were either subjected to behavioral testing or killed, and their hippocampus was extracted for further experiments. One-way ANOVA was used to analyze the data. The results showed that the ADT rats spend significantly more time in the target quadrant compared to the AD group in the probe test (p ≤ 0.05). Also, Trk-B, PKC and AKT levels decrease following injection of Aβ1-42 (p <0.001). Aerobic exercise increased Trk-B, PKC and AKT levels compared to AD rats (p≤0.05). Therefore, aerobic exercise seems to help improve the spatial memory by activating the TrkB- PKC-AKT signaling pathway.

کلیدواژه‌ها [English]

  • Alzheimer’s Disease
  • Trk-B
  • PKC
  • AKT
  • Aerobic Training
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