Document Type : Original Article
Authors
- Seyyed Mohammad Ali Azimi Dokht 1
- Reaz Gharakhanlou 2
- Naser Naghdi 3
- Davar Khodadadi 4
- Ali Asghar Zare Zade Mehrizi 5
1 PhD Student of Exercise Physiology, Department of Physical Education and Sport Sciences, Faculty of Humanities, TarbiatModares University, Tehran, Iran.
2 Professor, Department of Physical Education and Sport Sciences, Faculty of Humanities, Tarbiat Modares University, Tehran, Iran
3 Professor, Department of Physiology and Pharmacology, Pasteur Institute of Iran, Tehran, Iran
4 PhD Student of Exercise Physiology, Department of Physical Education and Sport Sciences, Faculty of Humanities, Tarbiat Modares University, Tehran, Iran
5 PhD Student of Exercise Physiology, Faculty of Physical Education and Sport Sciences, Kharazmi University, Tehran, Iran
Abstract
Background and Aim: Previous studies have shown that brain-derived neurotrophic factor (BDNF) plays a vital role to induce the beneficial effects of exercise on the brain, especially the hippocampus. However, signaling pathways related to increasing BDNF induced by forced exercise in hippocampus not well known. Therefore, the purpose of current study was to investigate the effect of 8-weeks of low-intensity forced treadmill training on genes expression of peroxisome proliferator activated receptor-gamma co-activator 1-alpha (PGC-1α), Fibronectin type III domain containing 5 (FNDC5) and BDNF in hippocampus of male rats. Materials and Methods: Eighteen male Wistar rats were randomly divided into 3 groups: Control (n=6), Sham (n=6) and Forced training (n=6). Animals in the training group performed 8 weeks of forced training (5 sessions per week) with low-intensity (speed: 15 m/min) on the treadmill. Twenty-four hours after last session of exercise, rats were decapitated and the hippocampus were carefully removed and rapidly frozen in liquid nitrogen, and finally stored at -80°C for further analysis. Real-Time-PCR method was used to measure the expression of genes in the hippocampus. Data were analyzed by one way ANOVA and Tukey post hoc test at the significant level of p<0.05.Results: The results of showed that mRNA levels of PGC-1α(p<0.003), FNDC5 (p<0.006) and BDNF(p<0.02) in the forced training group were significantly higher than the control group. However, there was no significant difference in the mRNA levels of genes between the sham and control groups. Conclusion: It seems that the low-intensity forced training, likely through a PGC-1α-dependent signaling pathway, leads to increasing expression of FNDC5 and as a result causes increasing the expression of BDNF. Thus, this type exercise training can be used as induction of beneficial effects of exercise on the hippocampus.
Keywords
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