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The Striatal Heterodimers A2AR-D2Rs Are Linked To Ergogenic Effects Of Caffeine

Alves, A. C. d. B.; Aguiar, A. S.; Santos, N. d. S.; Tavares, A. P.; Panatta, G.

2023-05-24 neuroscience
10.1101/2023.05.24.541930 bioRxiv
Show abstract

Adenosine 2A receptors (A2ARs) are abundant in the striatum, and they are found co-localized with dopamine D2 receptors (D2R) and in the heterodimer form A2AR-D2R. Previous we demonstrated that caffeine delays central fatigue through adenosine 2A receptors (A2ARs) antagonism, striatal neuroplasticity and mitochondrial metabolism enhancement. In this study we demonstrate the participation of striatal A2AR-D2R in the ergogenic outcomes. Two-hundred swiss adult mice were treated systemically (i.p.) and centrally (striatum-st.) with caffeine, SCH58261 (A2AR antagonist), DPCPX (A1R antagonist) and haloperidol (D2R antagonist), and performed the open field test, treadmill incremental exercise and grip strength meter test We observed that A2AR-D2R antagonic effects are linked to motor control (p < 0.05) and enhancement of power (p < 0.05). However, the role of A2AR-D2R in the mechanism of strength generation seems to differ from motor control.

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