Dopamine  D2 Receptor Mechanisms  Contribute  to Age-Related Cognitive  Decline: The Effects of Quinpirole  on Memory and Motor Performance  in Monkeys

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	Dopamine D2 Receptor Mechanisms Contribute to Age-Related Cognitive Decline: The Effects of Quinpirole on Memory and Motor Performance in Monkeys
	Arnsten AF*1; Cai JX 2; Steere JC 1; GoldmanRakic PS 1
	1995
发表期刊	JOURNAL OF NEUROSCIENCE
ISSN	0270-6474
卷号	15 期号:5 页码:3429-3439
合作性质	其它
摘要	The D2 dopamine (DA) receptor agonist, quinpirole, was characterized in young adult monkeys, young reserpine-treated monkeys and aged monkeys to assess the contribution of DA to age-related loss of prefrontal cortical (PFC) cognitive function, Monkeys were tested on a delayed response memory task that depends on the PFC, and a fine motor task that taps the functions of the motor cortex, In young adult monkeys, low quinpirole doses impaired performance of the PFC and fine motor tasks, while higher doses improved memory performance and induced dyskinesias and ''hallucinatory-like'' behaviors. The pattern of the quinpirole response in reserpine-treated monkeys suggested that the impairments in delayed response and fine motor performance resulted from drug actions at D2 autoreceptors, while the improvement in delayed response performance, dyskinesias and ''hallucinatory-like'' behaviors resulted from actions at postsynaptic receptors. In aged monkeys, low doses of quinpirole continued to impair fine motor performance, but lost their ability to impair delayed response performance. The magnitude of cognitive improvement and the incidence of ''hallucinatory-like'' behaviors were also reduced in the aged animals, suggesting some loss of postsynaptic D2 receptor function, The pattern of results is consistent with the greater loss of DA from the PFC than from motor areas in aged monkey brain (Goldman-Rakic and Brown, 1981; Wenk et al., 1989), and indicates that DA depletion contributes significantly to age-related cognitive decline.
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收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.kiz.ac.cn/handle/152453/5107
专题	其他
作者单位	1.Section of Neurobiology, Yale Medical School, New Haven, Connecticut 06510-8001 2.Kunming Institute Of Zoology, Academia Sinica, Kunming, Yunnan, China 650223
推荐引用方式 GB/T 7714	Arnsten AF*,Cai JX,Steere JC,et al. Dopamine D2 Receptor Mechanisms Contribute to Age-Related Cognitive Decline: The Effects of Quinpirole on Memory and Motor Performance in Monkeys[J]. JOURNAL OF NEUROSCIENCE,1995,15(5):3429-3439.
APA	Arnsten AF*,Cai JX,Steere JC,&GoldmanRakic PS.(1995).Dopamine D2 Receptor Mechanisms Contribute to Age-Related Cognitive Decline: The Effects of Quinpirole on Memory and Motor Performance in Monkeys.JOURNAL OF NEUROSCIENCE,15(5),3429-3439.
MLA	Arnsten AF*,et al."Dopamine D2 Receptor Mechanisms Contribute to Age-Related Cognitive Decline: The Effects of Quinpirole on Memory and Motor Performance in Monkeys".JOURNAL OF NEUROSCIENCE 15.5(1995):3429-3439.

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