Stress enables synaptic depression in CA1 synapses by acute and chronic morphine: Possible mechanisms for corticosterone on opiate addiction

PSYCH OpenIR > 中国科学院心理研究所回溯数据库(1956-2010)

	Stress enables synaptic depression in CA1 synapses by acute and chronic morphine: Possible mechanisms for corticosterone on opiate addiction
	Yang, Y ; Zheng, XG; Wang, YF ; Cao, J; Dong, ZF; Cai, JX ; Sui, N; Xu, L; N. Sui
摘要	The hippocampus, being sensitive to stress and glucocorticoids, plays significant roles in certain types of learning and memory. Therefore, the hippocampus is probably involved in the increasing drug use, drug seeking, and relapse caused by stress. We have studied the effect of stress with morphine on synaptic plasticity in the CA1 region of the hippocampus in vivo and on a delayed-escape paradigm of the Morris water maze. Our results reveal that acute stress enables long-term depression (LTD) induction by low-frequency stimulation (LFS) but acute morphine causes synaptic potentiation. Remarkably, exposure to an acute stressor reverses the effect of morphine from synaptic potentiation ( similar to 20%) to synaptic depression ( similar to 40%), precluding further LTD induction by LFS. The synaptic depression caused by stress with morphine is blocked either by the glucocorticoid receptor antagonist RU38486 or by the NMDA-receptor antagonist D-APV. Chronic morphine attenuates the ability of acute morphine to cause synaptic potentiation, and stress to enable LTD induction, but not the ability of stress in tandem with morphine to cause synaptic depression. Furthermore, corticosterone with morphine during the initial phase of drug use promotes later delayed-escape behavior, as indicated by the morphine-reinforced longer latencies to escape, leading to persistent morphine-seeking after withdrawal. These results suggest that hippocampal synaptic plasticity may play a significant role in the effects of stress or glucocorticoids on opiate addiction.; The hippocampus, being sensitive to stress and glucocorticoids, plays significant roles in certain types of learning and memory. Therefore, the hippocampus is probably involved in the increasing drug use, drug seeking, and relapse caused by stress. We have studied the effect of stress with morphine on synaptic plasticity in the CA1 region of the hippocampus in vivo and on a delayed-escape paradigm of the Morris water maze. Our results reveal that acute stress enables long-term depression (LTD) induction by low-frequency stimulation (LFS) but acute morphine causes synaptic potentiation. Remarkably, exposure to an acute stressor reverses the effect of morphine from synaptic potentiation ( similar to 20%) to synaptic depression ( similar to 40%), precluding further LTD induction by LFS. The synaptic depression caused by stress with morphine is blocked either by the glucocorticoid receptor antagonist RU38486 or by the NMDA-receptor antagonist D-APV. Chronic morphine attenuates the ability of acute morphine to cause synaptic potentiation, and stress to enable LTD induction, but not the ability of stress in tandem with morphine to cause synaptic depression. Furthermore, corticosterone with morphine during the initial phase of drug use promotes later delayed-escape behavior, as indicated by the morphine-reinforced longer latencies to escape, leading to persistent morphine-seeking after withdrawal. These results suggest that hippocampal synaptic plasticity may play a significant role in the effects of stress or glucocorticoids on opiate addiction.
关键词	hippocampus long-term depression associative learning stress morphine-seeking opiate addiction
学科领域	医学心理学
	2004-03-10
语种	英语
发表期刊	JOURNAL OF NEUROSCIENCE
ISSN	0270-6474
卷号	24 期号:10 页码:2412-2420
期刊论文类型	Article
收录类别	SCI ; SSCI
WOS记录号	WOS:000220129800008
引用统计	被引频次：70[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.psych.ac.cn/handle/311026/5701
专题	中国科学院心理研究所回溯数据库(1956-2010)
通讯作者	N. Sui
作者单位	1.Chinese Acad Sci, Kunming Inst Zool, Lab Learning & Memory, Kunming 650223, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Chinese Acad Sci, Inst Psychol, Key Lab Mental Hlth, Beijing 100101, Peoples R China 4.Chinese Acad Sci, Kunming Inst Zool, Lab Behav & Brain, Kunming 650223, Peoples R China
推荐引用方式 GB/T 7714	Yang, Y,Zheng, XG,Wang, YF,et al. Stress enables synaptic depression in CA1 synapses by acute and chronic morphine: Possible mechanisms for corticosterone on opiate addiction[J]. JOURNAL OF NEUROSCIENCE,2004,24(10):2412-2420.
APA	Yang, Y.,Zheng, XG.,Wang, YF.,Cao, J.,Dong, ZF.,...&N. Sui.(2004).Stress enables synaptic depression in CA1 synapses by acute and chronic morphine: Possible mechanisms for corticosterone on opiate addiction.JOURNAL OF NEUROSCIENCE,24(10),2412-2420.
MLA	Yang, Y,et al."Stress enables synaptic depression in CA1 synapses by acute and chronic morphine: Possible mechanisms for corticosterone on opiate addiction".JOURNAL OF NEUROSCIENCE 24.10(2004):2412-2420.

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