Interaction of contractile activity and training history on mRNA abundance in skeletal muscle from trained athletes.
نویسندگان
چکیده
Skeletal muscle displays enormous plasticity to respond to contractile activity with muscle from strength- (ST) and endurance-trained (ET) athletes representing diverse states of the adaptation continuum. Training adaptation can be viewed as the accumulation of specific proteins. Hence, the altered gene expression that allows for changes in protein concentration is of major importance for any training adaptation. Accordingly, the aim of the present study was to quantify acute subcellular responses in muscle to habitual and unfamiliar exercise. After 24-h diet/exercise control, 13 male subjects (7 ST and 6 ET) performed a random order of either resistance (8 x 5 maximal leg extensions) or endurance exercise (1 h of cycling at 70% peak O2 uptake). Muscle biopsies were taken from vastus lateralis at rest and 3 h after exercise. Gene expression was analyzed using real-time PCR with changes normalized relative to preexercise values. After cycling exercise, peroxisome proliferator-activated receptor-gamma coactivator-1alpha (ET approximately 8.5-fold, ST approximately 10-fold, P < 0.001), pyruvate dehydrogenase kinase-4 (PDK-4; ET approximately 26-fold, ST approximately 39-fold), vascular endothelial growth factor (VEGF; ET approximately 4.5-fold, ST approximately 4-fold), and muscle atrophy F-box protein (MAFbx) (ET approximately 2-fold, ST approximately 0.4-fold) mRNA increased in both groups, whereas MyoD (approximately 3-fold), myogenin (approximately 0.9-fold), and myostatin (approximately 2-fold) mRNA increased in ET but not in ST (P < 0.05). After resistance exercise PDK-4 (approximately 7-fold, P < 0.01) and MyoD (approximately 0.7-fold) increased, whereas MAFbx (approximately 0.7-fold) and myostatin (approximately 0.6-fold) decreased in ET but not in ST. We conclude that prior training history can modify the acute gene responses in skeletal muscle to subsequent exercise.
منابع مشابه
تاثیر یک دوره تمرین مقاومتی بر بیان اینترلوکین-6 و RCAN-1 در عضله اسکلتی موشهای صحرایی دیابتی شده با استروپتوزوسین
Background: Myokines released from skeletal muscle have multiple metabolic and hypertrophic effects. On the other hand, one of proposed pathways for effects of exercise training on metabolic diseases is calcineurin signaling pathway. With considering to relation between interleukin-6 (IL-6) and calcineurin, the purpose of this study was to investigate whether the resistance training has an effe...
متن کاملتأثیر سه ماه تمرین هوازی بر مسیر پیام رسانی Wnt عضله اسکلتی موشهای صحرایی نر
Background: Atrophy in skeletal muscle plays an important role in disease-related tissue dysfunction such as sarcopenia. The Wnt-signaling pathway has been shown to be critical for skeletal muscle development. Current evidence suggests that exercise trainings may alter hypertrophy-related signaling in skeletal muscle. Therefore, the purpose of this study was investigating the effect of three mo...
متن کاملThe Response of Skeletal Muscle-Expressed Neurotrophins to Acute Resistance Exercise in Male Wistar Rats
Background. BDNF and NT-4/5 have been proposed to be involved in the coordinated adaptations of the neuromuscular system to the elevated level of activity, but an activity-dependent expression of neurotrophins in skeletal muscle is not well established. Objectives. We, therefore, investigated the effect of one session of resistance exercise on mRNA expression of some neurotrophins in Slow and ...
متن کاملExercise-associated Muscle Cramps in Runners: A Review
Objective: Exercise-associated Muscle Cramp (EAMC) is an intense, painful, and involuntary contraction of skeletal muscles during a physical activity. Runners are more prone to this syndrome than other athletes. The present paper aims to review of the literature on EAMC in runners to determine the reasons and nature of EAMC in this sports field. Methods: A search was conducted for related stud...
متن کاملcompare the effect of eight weeks of traditional resistance training and TRX on muscle injury indices of inactive Women
Background & Aims: Intense physical activity, despite its various benefits for general health, can cause possible damage to various tissues of the body due to increased oxidative stress through increasing production of reactive species. Muscle bruising and pain is a common experience that occurs after performing unusual and intense activities, especially after resistance and extroverted activit...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- American journal of physiology. Endocrinology and metabolism
دوره 290 5 شماره
صفحات -
تاریخ انتشار 2006