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Abstract:
©, 2015, Journal of Xi'an Jiaotong University (Medical Sciences). All right reserved. Objective: To investigate changes in the firing activities of nucleus accumbens (NAc) neurons and their response to 5-HT<inf>7</inf> receptor stimulation in a rat model of Parkinson's disease (PD). Methods: The firing activities and response of NAc neurons to 5-HT<inf>7</inf> receptor agonist in PD rats were recorded by in vivo electroneurophysiology and neuropharmacology and then were compared with those in the sham group. Results: The mean firing rate of NAc neurons was (5.46±0.88)Hz in the sham rats and (3.77±0.48)Hz in the PD rats. The firing rate of NAc neurons increased significantly compared with that in the sham rats (P<0.05). In PD rats, 65% of NAc neurons fired in bursts and 35% fired irregularly. However, in the sham rats, 57.5% of NAc neurons fired in bursts and 42.5% fired irregularly. There was no significant difference in the firing pattern of NAc neurons between the PD and sham rats (P>0.05). Systemic administration of 5-HT<inf>7</inf> receptor agonist AS19 increased the firing rate of NAc neurons in the sham and PD rats. This excitation was significant at a high dose of 160 μg/kg for NAc neurons in the sham rats (P<0.05). However, the excitation produced by AS19 was significant at a high dose of 80 μg/kg in PD rats (P<0.05). The cumulative dose-produced excitation in the PD rats was lower than that in the sham rats. The effects induced by AS19 were reversed by the 5-HT<inf>7</inf> receptor antagonist SB269970 in both groups. Conclusion: The reinforced firing activity of NAc neurons might be mediated by 5-HT<inf>7</inf> receptor in the neurons of PD rats.
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Journal of Xi'an Jiaotong University (Medical Sciences)
ISSN: 1671-8259
Year: 2015
Issue: 3
Volume: 36
Cited Count:
WoS CC Cited Count: 0
SCOPUS Cited Count:
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count: -1
Chinese Cited Count: -1
30 Days PV: 10
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