Extinction Circuits Controlling Heroin Seeking
控制海洛因寻找的灭绝电路
基本信息
- 批准号:10357930
- 负责人:
- 金额:$ 12.89万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2018
- 资助国家:美国
- 起止时间:2018-05-15 至 2023-06-15
- 项目状态:已结题
- 来源:
- 关键词:AddressAnatomyAnimalsAutomobile DrivingBehaviorBehavioralBrainBrain regionCocaineConditioned ReflexCuesDataDesire for foodEfferent PathwaysExposure toExtinction (Psychology)FemaleFoodFrightGenetic RecombinationGlobus PallidusHeroinHypothalamic structureLateralLeadLearningMasksMedialMediatingMemoryMotivationNeuroanatomyNeuronsNucleus AccumbensOpiate AddictionOutputPathway interactionsPharmaceutical PreparationsPlayPopulationPrefrontal CortexProcessPublic HealthRabiesRattusRelapseReportingResearchRetrievalRewardsRodentRodent ModelRoleSelf AdministrationSex DifferencesSiteSynapsesSystemTechniquesTestingTracerUnited StatesViralViral VectorWorkconditioned fearcravingdesigner receptors exclusively activated by designer drugsexperimental studyfeedinginnovationinsightmalememory processmemory retrievalmu opioid receptorsneural circuitnovelrecruittechnological innovationtheoriestoolvector
项目摘要
Abstract
Opiate addiction is a huge public health threat in the United States currently. There is a real need for new
treatments that reduce relapse rates, and a major relapse trigger is exposure to conditioned drug cues. The
conditioned response to seek drug is intimately tied to the memory retrieved by these reminder cues. However,
repeated exposure to these cues in the absence of reward can lead to a diminished conditioned response to
seek drug, through a process known as extinction. Extinction is thought to establish an opposing inhibitory
memory that suppresses the conditioned response, and has been shown to recruit portions of the prefrontal
cortex. In particular, the infralimbic (IL) subregion in rodents exerts this inhibitory control over downstream
effectors that would otherwise drive the conditioned response. This is true for a number of conditioned
behaviors, including conditioned cocaine seeking, food seeking, and fear. Preliminary data suggest that the
inhibitory function of this region is masked, but not lost, after heroin self-administration. This may be due to a
primary site of action of heroin at mu opioid receptors (MORs) in IL, as activation of IL-MORs elicits feeding
and a general hyper-appetitive state (Baldo 2016). Preliminary data suggest that IL-MORs also regulate the
motivation to seek heroin, and is consistent with a theory separate appetitive driver and limiter functions exist
within the IL cortex. These opposing functions may be encoded by distinct neuronal ensembles within IL with
distinct downstream targets. Two major efferent targets of IL that are known to regulate both food and drug
seeking are the lateral hypothalamus (LH) and the nucleus accumbens shell (NAshell). We propose that IL
neuronal ensembles projecting to the LH drive heroin seeking, whereas those projecting to the NAshell inhibit
heroin seeking. Indeed, preliminary data show that chemogenetic activation of the IL to NAshell pathway
reduces cue-induced reinstatement of heroin seeking, similar to our reported effects in cocaine-seeking
animals (Augur et al. 2016). We will use a novel TRAP-DREADD system to tag and reactivate different
functional neuronal ensembles in IL that drive versus inhibit heroin seeking, and we will identify their
downstream efferent targets by retrograde tracing. We will also use pathway-specific chemogenetics to
activate these different IL efferent pathways and establish their functional role in cue-induced heroin relapse.
Finally, we will use a novel trans-synaptic "trans-DREADD" strategy to examine the second-order circuits
controlling heroin seeking. These experiments will determine the specific functional neural circuitry of IL and its
downstream effectors, and establish their role in driving vs limiting heroin seeking. Furthermore, this work will
provide new insight into the specific neuroanatomy controlling heroin seeking and the extent to which these
limiter circuits can be exploited to reduce relapse.
摘要
阿片类药物成瘾是美国目前一个巨大的公共健康威胁。有一个真实的需要新的
治疗,降低复发率,一个主要的复发触发因素是暴露于条件药物线索。
寻找药物的条件反应与这些提醒线索所恢复的记忆密切相关。然而,
在没有奖励的情况下,反复接触这些线索会导致条件反应减弱,
通过一个被称为灭绝的过程来寻求药物。灭绝被认为是建立一种相反的抑制作用,
抑制条件反应的记忆,并已被证明可以招募部分前额叶
特别是,啮齿动物的边缘下(IL)亚区对下游神经元发挥这种抑制性控制作用。
这些效应物本来会驱动条件反应。这对于许多条件反应来说是正确的。
行为,包括条件性可卡因寻求,食物寻求和恐惧。初步数据表明,
海洛因自我抑制后,该区域的抑制功能被掩盖,但并未丧失,这可能是由于
海洛因对IL中μ阿片受体(MORs)的主要作用位点,因为IL-μ MORs的激活会引发进食
和一般的食欲亢进状态(Baldo 2016)。初步数据表明,IL-10MORs也调节
寻求海洛因的动机,并与存在独立的食欲驱动器和限制器功能的理论相一致
这些相反的功能可以由IL内不同的神经元集合编码,
不同的下游靶点。已知IL的两个主要传出靶点调节食物和药物
寻找的是外侧下丘脑(LH)和丘脑核壳(NAshell)。我们认为IL
投射到LH的神经元群驱动海洛因寻找,而投射到NA壳的神经元群抑制海洛因寻找。
实际上,初步数据显示IL至NAshell途径化学发生活化
减少了线索刺激诱导的海洛因寻求的恢复,类似于我们报道的可卡因寻求的效果。
我们将使用一种新的TRAP-DREADD系统来标记和重新激活不同的
IL中驱动与抑制海洛因寻求的功能性神经元集合,我们将确定它们的
我们还将使用通路特异性化学遗传学,
激活这些不同的IL传出通路,并确定它们在线索诱导的海洛因复吸中的功能作用。
最后,我们将使用一种新的跨突触"trans-DREADD"策略来研究二阶回路
这些实验将确定IL的特定功能神经回路及其在控制海洛因寻求中的作用。
下游效应器,并建立他们的作用,驱动与限制海洛因寻求。此外,这项工作将
提供了新的见解,具体的神经解剖控制海洛因寻求和程度,这些
可以利用限制器电路来减少复发。
项目成果
期刊论文数量(0)
专著数量(0)
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会议论文数量(0)
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JAMIE PETERS其他文献
JAMIE PETERS的其他文献
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{{ truncateString('JAMIE PETERS', 18)}}的其他基金
Prefrontal mechanisms underlying polydrug heroin and alcohol use
多种药物海洛因和酒精使用的前额叶机制
- 批准号:
10739702 - 财政年份:2023
- 资助金额:
$ 12.89万 - 项目类别:
Simulating Extinction Memory with Infralimbic DREADDs
使用下边缘 DREADD 模拟消退记忆
- 批准号:
8849885 - 财政年份:2014
- 资助金额:
$ 12.89万 - 项目类别:
Simulating Extinction Memory with Infralimbic DREADDs
使用下边缘 DREADD 模拟消退记忆
- 批准号:
8767607 - 财政年份:2014
- 资助金额:
$ 12.89万 - 项目类别:
Pre-existing Differences in BDNF and Fear Extinction
BDNF 和恐惧消退预先存在的差异
- 批准号:
7613259 - 财政年份:2008
- 资助金额:
$ 12.89万 - 项目类别:
Metabotropic glutamate receptors mediate cocaine relapse
代谢型谷氨酸受体介导可卡因复发
- 批准号:
6836990 - 财政年份:2004
- 资助金额:
$ 12.89万 - 项目类别:
Metabotropic glutamate receptors mediate cocaine relapse
代谢型谷氨酸受体介导可卡因复发
- 批准号:
6948176 - 财政年份:2004
- 资助金额:
$ 12.89万 - 项目类别:
Metabotropic glutamate receptors mediate cocaine relapse
代谢型谷氨酸受体介导可卡因复发
- 批准号:
7115921 - 财政年份:2004
- 资助金额:
$ 12.89万 - 项目类别:
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