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题目:: Chronic cocaine reduces RGS4 mRNA in rat prefrontal cortex and dorsal striatum.
作者:: Schwendt(Marek),Hearing(Matthew C),See(Ronald E),McGinty(Jacqueline F)
状态:: 发布时间2007-07-16 , 更新时间 2013-11-21
期刊:: Neuroreport
摘要:: Neuroadaptations affecting dopamine transmission within the prefrontal cortex and striatum are thought to underlie relapse to cocaine seeking after extended periods of abstinence. Regulator of G-protein signaling 4 (RGS4) is a forebrain-enriched protein known to be dynamically regulated by dopamine receptors in response to acute psychostimulant administration. In this report, chronic noncontingent (cocaine binge) or response-contingent (self-administration) delivery of cocaine followed by 2-3 weeks of abstinence resulted in a decrease of RGS4 mRNA in the dorsal striatum and prefrontal cortex. Furthermore, re-exposure to the cocaine-associated context after abstinence renewed the drug seeking and restored the levels of RGS4 mRNA to control values. Changes in RGS4 mRNA levels might signal abnormal receptor G-protein coupling that impacts cocaine seeking.
语言:: eng
DOI:

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