Regulation of nucleus accumbens neurons by sleep and circadian rhythm
睡眠和昼夜节律对伏隔核神经元的调节
基本信息
- 批准号:10442467
- 负责人:
- 金额:$ 29.97万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2020
- 资助国家:美国
- 起止时间:2020-07-15 至 2025-06-30
- 项目状态:未结题
- 来源:
- 关键词:AMPA ReceptorsAcuteAdenosineAdolescenceAdolescentAdolescent DevelopmentAffectAnhedoniaBehaviorBehavioralChronicCircadian DysregulationCircadian RhythmsCircadian desynchronyCognitiveCollaborationsCorpus striatum structureCuesDiurnal RhythmDopamineEmotionalEvaluationExhibitsFibrinogenGene MutationGlutamatesHigh School StudentHumanHyperactivityLeadMedialMediatingMembraneModelingMolecularMolecular GeneticsNeuronsNucleus AccumbensOutcomePharmaceutical PreparationsPhasePrefrontal CortexPublishingRattusRegulationResearch Project GrantsRewardsRiskRodent ModelSelf AdministrationSiteSleepSleep DeprivationSleep FragmentationsSleep disturbancesSubstance abuse problemSucroseSynapsesSynaptic TransmissionTeenagersTestingTimeVentral Striatumbasebehavior testbehavioral phenotypingcellular targetingcholinergiccircadiancircadian regulationcognitive controlcortico-limbic circuitsdrug rewarddrug seeking behaviordrug testinghuman datahuman imagingimaging studyinsightmolecular phenotypemotivated behaviorpostsynapticpreferencerelating to nervous systemresponsereward processingsubstance usetraittransmission process
项目摘要
PROJECT SUMMARY
Adolescence is a vulnerable period for initiating substance use and abuse, during which time sleep and circadian
rhythm disruptions are pervasive. It is increasingly recognized that sleep and circadian rhythm causally, and
powerfully regulate reward processing, but the underlying mechanisms remain poorly understood. Could sleep
and circadian rhythm traits be related to reward circuit function? Whether and how do sleep and circadian
disruptions lead to increased vulnerability for substance use in adolescents? The central hypothesis of the Center
application is that adolescent development acts on underlying sleep and circadian traits to modify homeostatic
sleep drive, circadian phase, and circadian alignment, which in turn impact cortico-limbic functions critical to
substance use risk (e.g., reward and cognitive control). It is further hypothesized that specific manipulations of
sleep and circadian rhythms during adolescence will affect reward responsivity and cognitive control in either
positive or negative directions. This research project (Project 5) will focus on rodent models to determine the
cellular and synaptic mechanisms within the cortico-limbic circuit through which sleep and circadian disruptions
alter reward processing. Specifically, the nucleus accumbens (NAc) is a reward-processing “hub” in the ventral
striatum which is sensitive to both sleep and circadian disruptions. For example, acute sleep deprivation reduces
glutamate release at medial prefrontal cortex-to-NAc medium spiny principal neurons (MSNs) synapses;; chronic
sleep fragmentation increases cholinergic neural activity in the NAc (preliminary results);; robust diurnal
fluctuations in AMPA receptor (AMPAR) levels and intrinsic membrane excitability are also observed in the NAc
MSNs, and circadian gene mutation in the NAc leads to altered AMPAR transmission in MSNs. Together, these
results suggest that the NAc may represent a converging site for sleep and circadian rhythm to regulate reward
processing. Accordingly, Project 5 will test the hypothesis that sleep and circadian rhythm target aspects of NAc
synaptic transmission and neural modulation to regulate reward-motivated behaviors. Thus, Aim 1 will use
genetically diverse outbred rats to determine whether naturally occurring “early” and “late” chronotypes are
associated with different diurnal variation of AMPAR transmission in NAc MSNs. This aim will accommodate
molecular (Project 3) and behavioral (Project 4) characterizations of these rats. Aim 2 will determine whether
circadian disruptions without changes in sleep alter the diurnal variation of membrane excitability and/or
postsynaptic AMPAR levels in the NAc MSNs. Aim 3 will determine the effects of acute and chronic sleep
restrictions on adenosine and cholinergic transmission in the NAc, and the behavioral consequences in natural
or drug self-administration. The expected outcome of Project 5 will integrate and extend findings from behavioral
(Project 4) and molecular genetic (Project 3) studies, which together will provide mechanistic insights to inform
and further develop human studies (Projects 1&2).
项目概要
青春期是开始物质使用和滥用的脆弱时期,在此期间睡眠和昼夜节律
人们越来越认识到睡眠和昼夜节律之间存在因果关系。
强有力地调节奖励处理,但其背后的机制仍然知之甚少。
睡眠和昼夜节律特征是否与奖赏回路功能有关?
该中心的中心假设是:干扰会导致青少年更容易滥用药物吗?
应用是青少年发育作用于潜在的睡眠和昼夜节律特征以改变体内平衡
睡眠驱动力、昼夜节律阶段和昼夜节律调整,反过来又影响对睡眠至关重要的皮质边缘功能
进一步假设物质使用风险(例如奖励和认知控制)。
青春期的睡眠和昼夜节律都会影响奖励反应和认知控制。
该研究项目(项目 5)将重点关注啮齿动物模型,以确定积极或消极的方向。
皮质边缘回路内的细胞和突触机制,通过这些机制扰乱睡眠和昼夜节律
具体来说,伏隔核(NAc)是腹侧的奖励处理“中心”。
纹状体对睡眠和昼夜节律干扰都很敏感,例如,急性睡眠剥夺会减少。
内侧前额皮质至 NAC 中棘主神经元 (MSN) 突触处的谷氨酸释放;;慢性
睡眠碎片化会增加 NAc 中的胆碱能神经活动(初步结果);
在 NAc 中还观察到 AMPA 受体 (AMPAR) 水平和内在膜兴奋性的波动
MSN 和 NAc 中的昼夜节律基因突变共同导致 MSN 中 AMPAR 传输的改变。
结果表明,NAc 可能代表睡眠和昼夜节律的汇聚位点,以调节奖赏
因此,项目 5 将测试睡眠和昼夜节律针对 NAc 方面的假设。
因此,目标 1 将使用突触传递和神经调节来调节奖励动机行为。
遗传多样性的远交大鼠以确定自然发生的“早期”和“晚期”时钟型是否是
与 NAc MSN 中 AMPAR 传输的不同昼夜变化相关。这一目标将适应。
这些大鼠的分子(项目 3)和行为(项目 4)特征将决定目标 2 是否。
不改变睡眠的昼夜节律紊乱会改变膜兴奋性的昼夜变化和/或
NAc MSN 中的突触后 AMPAR 水平将决定急性和慢性睡眠的影响。
NAc 中腺苷和胆碱能传递的限制,以及自然行为的后果
或药物自我管理。项目 5 的预期结果将整合并扩展行为的发现
(项目 4)和分子遗传学(项目 3)研究,它们将共同提供机械见解以供参考。
并进一步开展人类研究(项目 1 和 2)。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Yanhua H Huang其他文献
Yanhua H Huang的其他文献
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{{ truncateString('Yanhua H Huang', 18)}}的其他基金
Regulation of nucleus accumbens neurons by sleep and circadian rhythm
睡眠和昼夜节律对伏隔核神经元的调节
- 批准号:
10217074 - 财政年份:2020
- 资助金额:
$ 29.97万 - 项目类别:
Regulation of nucleus accumbens neurons by sleep and circadian rhythm
睡眠和昼夜节律对伏隔核神经元的调节
- 批准号:
10655471 - 财政年份:2020
- 资助金额:
$ 29.97万 - 项目类别:
Mechanistic studies of alcohol-sleep interactions
酒精与睡眠相互作用的机制研究
- 批准号:
9912917 - 财政年份:2019
- 资助金额:
$ 29.97万 - 项目类别:
Mechanistic studies of alcohol-sleep interactions
酒精与睡眠相互作用的机制研究
- 批准号:
10019443 - 财政年份:2019
- 资助金额:
$ 29.97万 - 项目类别:
Mechanistic studies of alcohol-sleep interactions
酒精与睡眠相互作用的机制研究
- 批准号:
10687066 - 财政年份:2019
- 资助金额:
$ 29.97万 - 项目类别:
Mechanistic studies of alcohol-sleep interactions
酒精与睡眠相互作用的机制研究
- 批准号:
10466827 - 财政年份:2019
- 资助金额:
$ 29.97万 - 项目类别:
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相似海外基金
Regulation of nucleus accumbens neurons by sleep and circadian rhythm
睡眠和昼夜节律对伏隔核神经元的调节
- 批准号:
10217074 - 财政年份:2020
- 资助金额:
$ 29.97万 - 项目类别:
Regulation of nucleus accumbens neurons by sleep and circadian rhythm
睡眠和昼夜节律对伏隔核神经元的调节
- 批准号:
10655471 - 财政年份:2020
- 资助金额:
$ 29.97万 - 项目类别: