Abstract

AimsParkinson's disease (PD) is characterized by progressive loss of dopamine cells. It is suggested that exercise could be employed as a non-pharmacological approach for reducing the risk of PD incidence. The purpose of this study was to compare the effects of 4-week Mild-intensity (MIEx) and progressive exercise (PEx) protocols on rotational behavior, GFAP, DA, TH, MANF, CDNF and NGF levels in striatum of parkinsonian rats induced by 6-hydroxydopamine. Methods42 Wistar male rats were divided into 6 groups including, healthy and PD controls, MIEx, PEx, healthy MIEx, and healthy PEx. MIEx protocol was performed as follows: 5 days a week, 2 sessions a day of 15 min at a speed of 15 m/min. PEx protocol encompassed a training regimen of 5 days a week initiating by 20 min in the first day reaching 50 min on the fifth day and 60 min in the next 3 weeks. PD was induced after training protocol by injection of 6-OHDA into the striatum of rats. For confirming PD, apomorphine rotational test was employed. Key findingsThe MIEx protocol did not have any positive impacts on the variables except for CDNF (P < 0.0001). Levels of DA (P < 0.0001) and TH (P = 0.0004) increased significantly after performing PEx protocol. Moreover, PEx protocol considerably reduced rotational behavior of rats (P = 0.0244). SignificanceThe findings of this research confirm positive effects of PEx in protecting against PD. This progressive training protocol has explicitly shown a neuroprotective effect against PD-inducing nervous toxin through increasing neurotrophins.

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