پژوهش در طب ورزشی و فناوری

ورود لاکتات به مغز برای سازگاری ناشی از تمرین استقامتی در اکسیداسیون لیپید ضروری است

نویسندگان

ملیحه آوسه 1
مریم کوشکی جهرمی 1
جواد نعمتی 1
سعید اسماعیلی ماهانی 2

1 دانشگاه شیراز

2 دانشگاه شهید باهنر کرمان

https://doi.org/10.61186/jsmt.21.25.1
چکیده
اخیرا لاکتات به عنوان یک عامل سیگنالینگ درگیر در متابولیسم شناحته شده است. هدف از مطالعه حاضر بررسی نقش ورود لاکتات به مغز در حین تمرین بر سازگاری ناشی از تمرین استقامتی در اکسیداسیون لیپید بود. 24سر موش صحرایی نر در سن هشت‌ هفتگی با میانگین وزن 21 ± 197 گرم در سه گروه کنترل، تمرینی صرف و گروه تمرین + 4-CIN (که منع ورود لاکتات به مغز را در حین تمرین تجربه می کرد)، تقسیم شدند. تمامی گروه ها یک جلسه تمرین استقامتی را 72 ساعت بعد از پروتکل 12 هفته ای تمرین انجام دادند. سطوح اسیدهای چرب آزاد (FFA) و تری گلیسیرید در پلاسما و بافت چربی اپیدیدیمال و CAMP و اینوزیتول تری فسفات بلافاصله بعد از تمرین استقامتی حاد با تکنیک الایزا اندازه گیری و بوسیله تحلیل واریانس یک راهه بین گروهها مقایسه شد.تمرین استقامتی باعث افزایش غلظت لاکتات مایع مغزی نخاعی در هر دو گروه تمرین صرف و تمرین + 4-CIN نسبت به گروه کنترل شد. غلظت لاکتات مایع مغزی نخاعی در گروه تمرین + 4-CIN نسبت به تمرین صرف پایین تر بود. بلافاصله بعد از تمرین استقامتی حاد، کاهش معنی دار 61 و31 درصدی در سطوح پلاسمایی تری گلیسرید، کاهش معنی دار 39 و 26 درصدی در سطوح تری گلیسرید بافت چربی، افزایش معنی دار 125 و 56 درصدی در سطوح پلاسمایی FFA، افزایش معنی دار 217 و 125 درصدی در سطوح پلاسمایی FFA، افزایش معنی دار 87 و 41 درصدی در سطوح CAMP بافت چربی و افزایش معنی دار 90 و 49 درصدی سطوح اینوزیتول تری فسفات بافت چربی به ترتیب در گروه تمرینی صرف و تمرین + 4-CIN نسبت به گروه کنترل مشاهده شد. سطوح تری گلیسرید پلاسما و بافت چربی در گروه تمرین + 4-CIN به طور معنی دار نسبت به گروه تمرینی صرف بالاتر و سطوح FFA پلاسما و بافت چربی بطور معنی دار پایین تر از گروه تمریی صرف بود.نتایج کلی تحقیق نشان داد که لاکتات به واسطه عملش در مغز می تواند در سازگاری ناشی از تمرین استقامتی در اکسیداسیون لیپید اثرگذار باشد.

کلیدواژه‌ها

اسید چرب آزاد
تری گلیسیرید
لاکتات مغز
تمرین استقامتی

عنوان مقاله English

Lactate Entrance into the Brain is Necessary for Endurance Exercise-Induced Adaptation in Lipid Oxidation

نویسندگان English

Malihe Aveseh 1
Maryam Koushkie Jahromi 1
Javad Nemati 1
Saeed Esmaeili Mahani 2
1 Shiraz University
2 Shahid Bahonar University of Kerman
چکیده English

Lactate has been recently considered as a signaling factor involved in metabolism. The aim of this study was to investigate the role of lactate entrance into the brain on endurance training-induced adaptations in lipid oxidation.

24 male rats (age: 8 weeks, weight: 197 ± 21 g) were divided into control (C), trained (T), and traind+4-CIN (T+4-CIN, which experienced the inhibition of lactate entrance into the brain during exercise). All animals performed a single session of acute endurance exercise following their 12-weeks training protocol. Free fatty acids (FFA) and triglyceride content in plasma and adipose tissue and cAMP and Inositol triphosphate (PI3) content in epididymal fat were measured immediately after acute exercise using ELISA and were compared among the groups by one-way analysis of variance (ANOVA).

Acute exercise significantly increased lactate concentration in cerebrospinal fluid (SCF) in both T and T+4-CIN compared to the C group. Lactate concentration was slightly lower in T + 4-CIN compared to the T. Immediately after acute endurance training, a significant decrease of 61 and 31% in plasma triglyceride levels, a significant decrease of 39 and 26% in adipose tissue triglyceride levels, a significant increase of 125 and 56% in plasma FFA levels, a significant increase of 217 and 125% increase in FFA plasma levels, a significant increase of 87 and 41% in adipose tissue cAMP levels, and a significant increase of 90 and 49% in adipose tissue inositol triphosphate levels was observed in the T and T+4-CIN compared to the control group, respectively (all P < 0.01). Plasma triglyceride and adipose tissue levels in the 4-CIN + training group were significantly higher and plasma and adipose tissue FFA levels were significantly lower (all P < 0.05) than the values found in the T group. In conclusion, the results of the present study showed that lactate can be effective on endurance training-induced adaptations in lipid oxidation due to its action in the brain.

کلیدواژه‌ها English

Brain lactate
endurance training
Free fatty acids
Triglyceride
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