تأثیر تمرین هوازی بر میزان رهاسازی دوپامین در ناحیه‌ی خاکستری دور قناتی متعاقب مصرف مرفین

نوع مقاله : مقاله های پژوهشی

نویسندگان

1 ددانشجوی کارشناسی ارشد، گروه فیزیولوژی ورزش، دانشکده‌ی علوم ورزشی، دانشگاه اصفهان، اصفهان، ایران

2 استاد، گروه فیزیولوژی ورزش، دانشکده‌ی علوم ورزشی، دانشگاه اصفهان، اصفهان، ایران

3 استاد، گروه فیزیولوژی، دانشکده‌ی پزشکی، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران

چکیده

مقدمه: بر اساس تحقیقات متعدد، ورزش می‌تواند در پیش‌گیری و درمان اختلالات رفتارهای ناشی از اعتیاد به مرفین مؤثر باشد. ناحیه‌ی خاکستری دور قناتی (Periaqueductal gray یا PAG)، شامل نورون‌های دوپامینی زیادی است که مرفین تأثیرات خود را از طریق اثر بر این نورون‌ها و آزاد کردن دوپامین در این ناحیه اعمال می‌کند. از این رو، مطالعه‌ی حاضر با هدف بررسی تأثیر تمرین هوازی بر میزان رهاسازی دوپامین در هسته‌ی PAG در Ratهای سالم و معتاد به مرفین انجام شد.روش‌ها: این مطالعه، بر روی 28 Rat نر نژاد Wistar انجام شد که به 4 گروه اصلی سالین، مرفین، سالین + ورزش و مرفین + ورزش تقسیم شدند. گروه‌های ورزش به مدت 4 هفته روی تردمیل دویدند. تزریق درون صفاقی مرفین سه دز 10، 20 و 40 میلی‌گرم در 9 روز انجام و بعد از آن علایم ترک گرفته شد. پس از تهیه کردن نمونه‌های مختلف در سمپل (Sample)‌های 50 میکرولیتری با استفاده از دستگاه کروماتوگرافی مایع با کارایی بالا (High-performance liquid chromatography یا HPLC) مقدار دوپامین و متابولیت آن، دی‌هیدروکسی فنیل استیک اسید (3,4-Dihydroxyphenylacetic acid یا DOPAC) اندازه‌گیری شد. برای بررسی نتایج، میانگین غلظت دوپامین و متابولیت آن در هرگروه با استفاده از روش آماری One-way ANOVA با آزمون تعقیبی Tukey استفاده شد.یافته‌ها: غلظت دوپامین و متابولیت آن در گروه‌های مرفین، مرفین + ورزش و نیز سالین + ورزش در مقایسه با گروه سالین به طور معنی‌داری بیشتر بود (050/0 > P).نتیجه‌گیری: نتایج این مطالعه نشان داد که به احتمال زیاد، تمرین هوازی با تأثیر بر نورون‌های دوپامینی ناحیه‌ی PAG می‌تواند با آزادسازی دوپامین به عنوان یک روش پیش‌گیری کننده از اعتیاد استفاده شود.

کلیدواژه‌ها


عنوان مقاله [English]

The Effect of Aerobic Exercise on Dopamine Release in Periaqueductal Gray Region Following the Use of Morphine in Rat

نویسندگان [English]

  • Safoura Alizadeh 1
  • Mehdi Kargarfard 2
  • Hojatallah Alaei 3
1 MSc Student, Department of Exercise Physiology, School of Sports Sciences, University of Isfahan, Isfahan, Iran
2 Professor, Department of Exercise Physiology, School of Sports Sciences, University of Isfahan, Isfahan, Iran
3 Professor, Department of Physiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
چکیده [English]

Background: Several studies have shown that exercise plays an important role in modifying addictive behaviors. Moreover, it seems that morphine exerts its effects on periaqueductal gray (PAG) region, which contains dopamine neurons, through the release of dopamine in this area. Therefore, in this study, we decided to evaluate the effect of aerobic exercise on the release of dopamine in the periaqueductal gray region following the use of morphine in rat.Methods: 28 male Wistar rats were selected and randomly divided into 4 groups of saline, morphine, saline + exercise, and morphine + exercise. Exercise groups ran on the treadmill apparatus during four weeks. Three doses of morphine (10, 20, and 40 mg/kg) were injected intraperitoneally in 9 days, and withdrawal symptoms were recorded. After preparing different specimens in 50 μl samples, the concentration of dopamine and 3,4-dihydroxyphenylacetic acid (DOPAC) were measured using high-performance liquid chromatography (HPLC). To compare the mean levels of dopamine and DOPAC, one-way ANOVA and Tukey's post hoc tests were used.Findings: The concentrations of dopamine and DOPAC were significantly higher in morphine, morphine + exercise, and saline + exercise compared to saline group (P < 0.050 for all).Conclusion: The results of this study show that aerobic exercise may have an important role in releasing dopamine and DOPAC into the periaqueductal gray region area, and it can be used for prevention and treatment of morphine addiction.

کلیدواژه‌ها [English]

  • Aerobic Exercise
  • Morphine
  • Dopamine
  • 3,4-Dihydroxyphenylacetic acid
  • HPLC
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