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Narp expressed in medial prefrontal cortex neurons is not necessary for extinction of heroin self-administration

机译:在前额叶内侧神经元内侧表达的Narp不需要消灭海洛因

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摘要

The medial prefrontal cortex (mPFC) plays a key role in extinction learning. Previously, we found that expression of a Narp dominant-negative construct in the mPFC of mice blocked extinction of morphine conditioned place preference. In order to further investigate the role of mPFC Narp in the extinction of drug seeking, we tested whether mPFC Narp is necessary for the extinction of heroin self-administration in rats. Specifically, we injected an adeno-associated viral vector (AAV) expressing a dominant-negative form of Narp (NarpN) into the infralimbic region (IL) of the mPFC of rats and compared lever presses during extinction to those of rats injected with a control virus. In contrast to our previous study, we found that injection of NarpN did not affect extinction of heroin self-administration. Our findings suggest that mPFC Narp is necessary for extinction of opiate seeking in the Pavlovian conditioned place preference paradigm but not in the operant paradigm of drug self-administration.
机译:内侧前额叶皮层(mPFC)在消光学习中起关键作用。以前,我们发现在小鼠mPFC中Narp显性负构建体的表达阻止了吗啡条件性位置偏爱的灭绝。为了进一步研究mPFC Narp在消灭寻药中的作用,我们测试了mPFC Narp是否对消灭海洛因自用具有必要。具体来说,我们向大鼠mPFC的下缘区域(IL)注射了一种表达Narp(NarpN)显性负型的腺相关病毒载体(AAV),并比较了灭绝过程中与对照组注射的杠杆压力病毒。与我们以前的研究相反,我们发现注射NarpN不会影响海洛因自我给药的灭绝。我们的发现表明,在Pavlovian条件性场所偏爱范式中,阿片类药物的灭绝对mPFC Narp是必不可少的,而在药物自我管理的操作性范式中,则不需要。

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