PURPOSE: The aim of the present study was to evaluate neurotransmitter receptor changes in the nucleus tractus solitarii (NTS) of the rat after exercise training. METHODS: Twelve Wistar Kyoto rats were used. Six rats were submitted to a progressive training program in which they ran on a treadmill 5 d x wk(-1) for 13 wk (trained). The other rats were kept as controls (sedentary). After this period, the rats were killed and the brains processed for quantitative receptor autoradiography. Coronal brain sections were obtained using a cryostat and were incubated with a specific buffer solution containing [(3)H]vasopressin or (3)Hp-aminoclonidine. RESULTS: In the NTS of the trained rats, a decrease in the values of binding parameters (IC(50) and K(D)) of vasopressin receptors was observed, indicating an increase in the affinity of vasopressin receptors. On the other hand, a decreased affinity was observed for alpha(2)-adrenoceptors in the NTS of the trained rats in comparison with the sedentary animals. CONCLUSION: Exercise training leads to changes in vasopressin and alpha(2)-adrenoceptors, which may explain several physiological alterations occurring during physical activity.
PURPOSE: The aim of the present study was to evaluate neurotransmitter receptor changes in the nucleus tractus solitarii (NTS) of the rat after exercise training. METHODS: Twelve Wistar Kyoto rats were used. Six rats were submitted to a progressive training program in which they ran on a treadmill 5 d x wk(-1) for 13 wk (trained). The other rats were kept as controls (sedentary). After this period, the rats were killed and the brains processed for quantitative receptor autoradiography. Coronal brain sections were obtained using a cryostat and were incubated with a specific buffer solution containing [(3)H]vasopressin or (3)Hp-aminoclonidine. RESULTS: In the NTS of the trained rats, a decrease in the values of binding parameters (IC(50) and K(D)) of vasopressin receptors was observed, indicating an increase in the affinity of vasopressin receptors. On the other hand, a decreased affinity was observed for alpha(2)-adrenoceptors in the NTS of the trained rats in comparison with the sedentary animals. CONCLUSION: Exercise training leads to changes in vasopressin and alpha(2)-adrenoceptors, which may explain several physiological alterations occurring during physical activity.
Authors: Lisete C Michelini; Donal S O'Leary; Peter B Raven; Antonio C L Nóbrega Journal: Am J Physiol Heart Circ Physiol Date: 2015-05-29 Impact factor: 4.733
Authors: Panayotis K Thanos; Joshua Stamos; Lisa S Robison; Gary Heyman; Andrew Tucci; Gene-Jack Wang; John K Robinson; Brenda J Anderson; Nora D Volkow Journal: Behav Brain Res Date: 2012-10-26 Impact factor: 3.332
Authors: Henning Boecker; Ahmed Othman; Sarah Mueckter; Lukas Scheef; Max Pensel; Marcel Daamen; Jakob Jankowski; Hh Schild; Tr Tölle; M Schreckenberger Journal: Open Access J Sports Med Date: 2010-09-06