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Dopamine D1 receptor activation maintains motor coordination and balance in rats

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Abstract

Dopamine (DA) modulates motor coordination, and its depletion, as in Parkinson’s disease, produces motor impairment. The basal ganglia, cerebellum and cerebral cortex are interconnected, have functional roles in motor coordination, and possess dopamine D1 receptors (D1Rs), which are expressed at a particularly high density in the basal ganglia. In this study, we examined whether the activation of D1Rs modulates motor coordination and balance in the rat using a beam-walking test that has previously been used to detect motor coordination deficits. The systemic administration of the D1R agonist SKF-38393 at 2, 3, or 4 mg/kg did not alter the beam-walking scores, but the subsequent administration of the D1R antagonist SCH-23390 at 1 mg/kg did produce deficits in motor coordination, which were reversed by the full agonist SKF-82958. The co-administration of SKF-38393 and SCH-23390 did not alter the beam-walking scores compared with the control group, but significantly prevented the increase in beam-walking scores induced by SCH-23390. The effect of the D1R agonist to prevent and reverse the effect of the D1R antagonist in beam-walking scores is an indicator that the function of D1Rs is necessary to maintain motor coordination and balance in rats. Our results support that D1Rs mediate the SCH-23390-induced deficit in motor coordination.

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Acknowledgements

The authors thank Dr. Iván Pérez-Neri for his assistance in performing the recordings of spontaneous activity. We thank MVZ Hugo Lecona Butrón for support with the housing, care, maintenance and monitoring of the health of the experimental animals in the institute (INR-LGII). We thank MVZ Javier Pérez Gallaga for technical support.

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Correspondence to Antonio Bueno-Nava.

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Supplementary video 1

Effect of the systemic administration of the D1R agonist SKF-38393 alone, the administration of the antagonist SCH-23390 alone and the co-administration of SKF-38393 + SCH-23390. Note the null effect of the administration of SKF-38393 alone and the motor coordination deficit induced by SCH-23390. The co-administration of SKF-38393 + SCH-23390 indicates that the motor coordination is mediated by D1Rs. (MP4 94,640 kb)

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Avila-Luna, A., Gálvez-Rosas, A., Durand-Rivera, A. et al. Dopamine D1 receptor activation maintains motor coordination and balance in rats. Metab Brain Dis 33, 99–105 (2018). https://doi.org/10.1007/s11011-017-0126-x

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  • DOI: https://doi.org/10.1007/s11011-017-0126-x

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