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- W2078046592 abstract "We have characterised the effects of the recently described NMDA NR2B subtype selective antagonist, Ro 63-1908, on spontaneous behaviour and in tasks sensitive to non-selective NMDA antagonists. In both rats and wild type mice, Ro 63-1908 (1-30mg/kg sc) produced a mild increase in motor activity of lesser magnitude than that elicited by dizocilpine. No signs of overt PCP-like stereotypy were seen in either species at equivalent doses. PPI was also unaffected. However, in mice lacking the NR2A subunit, Ro 63-1908 (3-30mg/kg) produced a profound hyperactivity of similar magnitude to dizocilpine but few other 'PCP-like' behaviours. In rats, Ro 63-1908 (1-10mg/kg) did not affect Morris water maze or delayed matching performance. In a 5-choice serial reaction time task, requiring rats to respond to a visual stimulus presented after a fixed time interval, Ro 63-1908 (0.3-3mg/kg) produced a dramatic increase in premature responses - accuracy was relatively unaffected. Finally in a DRL24 task, Ro 63-1908 (0.3-3mg/kg) reduced inter-response time, increased response rate, and consequently reduced efficiency. We conclude that the improved profile of Ro 63-1908 compared to NMDA channel blockers is due to both its selectivity for the NR2B vs. NR2A subunit containing receptors and its activity-dependent mechanism of action. However, in the 5-CSRT and DRL24 tasks, Ro 63-1908 produced behaviours suggestive of impaired response inhibition, implicating a critical role of NMDA NR2B transmission in this process." @default.
- W2078046592 created "2016-06-24" @default.
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- W2078046592 date "2003-03-01" @default.
- W2078046592 modified "2023-10-16" @default.
- W2078046592 title "Evaluation of the NR2B-selective NMDA receptor antagonist Ro 63-1908 on rodent behaviour: evidence for an involvement of NR2B NMDA receptors in response inhibition" @default.
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- W2078046592 doi "https://doi.org/10.1016/s0028-3908(02)00402-1" @default.
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