Myosin II regulation of actin dynamics and the selective vulnerability of methamphetamine- and opioid-associated memory
肌球蛋白 II 调节肌动蛋白动力学以及甲基苯丙胺和阿片类药物相关记忆的选择性脆弱性
基本信息
- 批准号:10533792
- 负责人:
- 金额:$ 72.16万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2019
- 资助国家:美国
- 起止时间:2019-12-15 至 2024-11-30
- 项目状态:已结题
- 来源:
- 关键词:AODD relapseActinsAddressAmphetaminesAmygdaloid structureAssociation LearningBehaviorBehavior TherapyBrainBrain regionCell Culture TechniquesClinicalCocaineCytoskeletal ModelingCytoskeletonDataDendritic SpinesDevelopmentDopamineDrug usageFoodFundingGeneticHeroinHippocampusImageIndividualInvestigationKnowledgeLearningLiteratureMemoryMemory impairmentMental disordersMethamphetamineMethamphetamine use disorderMissionMorphineMotivationMyosin ATPaseMyosin Type IINational Institute of Drug AbuseNational Institute of Mental HealthNatureNeuromodulatorNeuromodulator ReceptorsNeuronsNicotineOpioidPharmaceutical PreparationsPharmacotherapyPhosphoric Monoester HydrolasesPhosphorylationPhosphotransferasesPolymersPopulationPost-Traumatic Stress DisordersPredispositionPreparationProteinsRegulationRelapseResearchRetrievalRewardsRisk FactorsRoleSelf AdministrationSignal TransductionSliceSmokeSpecificityStimulantStructureSynapsesSynaptic plasticityTherapeuticTimeTissuesTrainingUnited States National Institutes of HealthVertebral columnWorkcell cortexcell motilitydepolymerizationdrug abuse vulnerabilitydrug of abusefear memoryin vivoinhibitorinnovationmethamphetamine effectmethamphetamine userneural circuitnew therapeutic targetnon-muscle myosinnovel therapeuticsopioid usepharmacologicpolymerizationpolysubstance usepostsynapticpreventpublic health relevancerecruitrelapse riskresponsestimulant abusesubstance abuse preventiontherapeutic targettwo-photon
项目摘要
PROJECT SUMMARY
There are no pharmacotherapies for stimulant abuse, including methamphetamine (METH) and relapse rates
are high. Relapse triggered by reminders of drug use is a particular challenge to prevent, as the underlying
memories exert a powerful motivational influence over behavior and represent a lifelong relapse risk factor.
Learning is supported by structural plasticity in dendritic spines, driven by training-induced actin polymer-
ization. Memory stability is subsequently achieved by arresting actin dynamics, stabilizing the cytoskeleton. As
a result, memory is impervious to actin depolymerization within minutes of learning. However, prior work in the
lab discovered that the actin cytoskeleton supporting METH memories remains uniquely dynamic in the
amygdala long after training. This enables selective, retrieval-independent disruption of METH-associated
memories and drug seeking with a single administration of an actin depolymerizer. Because actin’s critical
roles in the body limit its therapeutic potential, focus shifted to nonmuscle myosin II (NMII), a direct driver of
learning-stimulated actin polymerization in spines. The effect of NMII inhibition is specific to the amygdala and
METH. Indeed, NMII inhibition has no effect on METH memories when other regions of the drug-memory
neural circuit are targeted and there is no similar retrieval-independent effect on memories for fear, food
reward or other drugs of abuse, including opioids. Genetic and pharmacologic targeting of NMII established it
is a viable therapeutic target and an NIH-funded medication development project for a clinically safe NMII
inhibitor is underway (UH3 NS096833). However, fundamental knowledge needed to understand and further
leverage this specificity is lacking. This will be addressed through the central hypothesis in this new project:
that METH-associated memories are uniquely supported in the amygdala by NMII, leaving those memories
selectively vulnerable to disruption long after learning, even when other associative learning is introduced. The
focus of this application is two-fold: (1) The key mechanistic question regarding the specific requirement of
the amgydala, actin-NMII and METH for selective memory storage disruption will be addressed. For this, the
impact of METH-related neuromodulators (Aim 1), as well as NMII phosphorylation and interacting partners
(Aim 2) will be studied on NMII-dependent BLA synaptic actin dynamics and METH-associated memory, with a
focus on factors that are unique to METH and the BLA. Once identified, the mechanism(s) responsible could
be harnessed to render relapse-inducing memories for other drugs of abuse vulnerable to disruption. (2)
Because most individuals with METH use disorder use multiple substances, including opioids, it is necessary
to determine the impact of polydrug administration on METH memory susceptibility to NMII inhibition.
Preliminary data indicate that METH confers susceptibility to previously impervious opioid associations.
Technically innovative approaches will be employed throughout the project, spanning from single synapse
manipulations in live tissue slices to memory-based self-administration studies.
项目摘要
没有针对兴奋剂滥用的药物疗法,包括甲基苯丙胺 (METH) 和复发率
都很高。 由吸毒提醒引发的复吸是预防的一个特殊挑战,因为潜在的
记忆对行为产生强大的激励影响,并且是终生复发的风险因素。
学习由树突棘的结构可塑性支持,由训练诱导的肌动蛋白聚合物驱动 -
化。 随后通过抑制肌动蛋白动力学、稳定细胞骨架来实现记忆稳定性。 作为
结果,记忆在学习后的几分钟内就不会受到肌动蛋白解聚的影响。 然而,之前的工作
实验室发现支持冰毒记忆的肌动蛋白细胞骨架在
训练后很长时间内杏仁核。 这使得能够选择性地、独立于检索地中断与 METH 相关的
只需施用肌动蛋白解聚剂即可实现记忆和药物寻找。 因为肌动蛋白至关重要
体内的作用限制了其治疗潜力,焦点转移到非肌肉肌球蛋白 II (NMII),它是
学习刺激的肌动蛋白在脊柱中聚合。 NMII 抑制的效果特定于杏仁核和
方法。 事实上,当药物记忆的其他区域被抑制时,NMII 抑制对冰毒记忆没有影响。
神经回路是有针对性的,对恐惧、食物的记忆没有类似的独立于检索的影响
奖励或其他滥用药物,包括阿片类药物。 NMII 的遗传和药理学靶向确立了它
是一个可行的治疗目标,也是 NIH 资助的临床安全 NMII 药物开发项目
抑制剂正在进行中(UH3 NS096833)。 然而,需要了解并进一步了解基础知识
缺乏这种特殊性。 这将通过这个新项目的中心假设来解决:
与冰毒相关的记忆在杏仁核中由 NMII 独特地支持,留下这些记忆
即使引入了其他联想学习,在学习后很长时间内也有选择性地容易受到干扰。 这
该申请的重点有两个:(1)关于具体要求的关键机械问题
将解决杏仁核、肌动蛋白-NMII 和 METH 造成选择性记忆存储中断的问题。 为此,
METH 相关神经调节剂(目标 1)以及 NMII 磷酸化和相互作用伙伴的影响
(目标 2)将研究 NMII 依赖性 BLA 突触肌动蛋白动力学和 METH 相关记忆,并具有
重点关注 METH 和 BLA 的独特因素。 一旦确定,负责的机制就可以
被利用来使对其他滥用药物的记忆容易被破坏,从而导致旧病复发。 (2)
由于大多数患有冰毒使用障碍的人会使用多种物质,包括阿片类药物,因此有必要
确定多种药物给药对 NMII 抑制的 METH 记忆敏感性的影响。
初步数据表明,冰毒使人们对以前不渗透的阿片类药物关联更加敏感。
整个项目将采用技术创新方法,涵盖单个突触
对活组织切片进行操作以进行基于记忆的自我管理研究。
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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Courtney A Miller其他文献
Courtney A Miller的其他文献
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{{ truncateString('Courtney A Miller', 18)}}的其他基金
Development of the AI-driven model for anti-SUD drug development based on neuronal plasticity
基于神经元可塑性的人工智能驱动抗SUD药物开发模型的开发
- 批准号:
10467528 - 财政年份:2022
- 资助金额:
$ 72.16万 - 项目类别:
Developing nonmuscle myosin II inhibitors for the treatment of glioblastoma
开发用于治疗胶质母细胞瘤的非肌肉肌球蛋白 II 抑制剂
- 批准号:
10557160 - 财政年份:2021
- 资助金额:
$ 72.16万 - 项目类别:
Developing nonmuscle myosin II inhibitors for the treatment of glioblastoma
开发用于治疗胶质母细胞瘤的非肌肉肌球蛋白 II 抑制剂
- 批准号:
10524193 - 财政年份:2021
- 资助金额:
$ 72.16万 - 项目类别:
Developing nonmuscle myosin II inhibitors for the treatment of glioblastoma
开发用于治疗胶质母细胞瘤的非肌肉肌球蛋白 II 抑制剂
- 批准号:
10595852 - 财政年份:2021
- 资助金额:
$ 72.16万 - 项目类别:
Impact of prenatal opioid exposure on long-range brain circuit connectivity and behavior
产前阿片类药物暴露对长程脑回路连接和行为的影响
- 批准号:
10163154 - 财政年份:2020
- 资助金额:
$ 72.16万 - 项目类别:
Impact of prenatal opioid exposure on long-range brain circuit connectivity and behavior
产前阿片类药物暴露对长程脑回路连接和行为的影响
- 批准号:
10060057 - 财政年份:2020
- 资助金额:
$ 72.16万 - 项目类别:
Myosin II regulation of actin dynamics and the selective vulnerability of methamphetamine- and opioid-associated memory
肌球蛋白 II 调节肌动蛋白动力学以及甲基苯丙胺和阿片类药物相关记忆的选择性脆弱性
- 批准号:
10596356 - 财政年份:2019
- 资助金额:
$ 72.16万 - 项目类别:
Myosin II regulation of actin dynamics and the selective vulnerability of methamphetamine- and opioid-associated memory
肌球蛋白 II 调节肌动蛋白动力学以及甲基苯丙胺和阿片类药物相关记忆的选择性脆弱性
- 批准号:
9916255 - 财政年份:2019
- 资助金额:
$ 72.16万 - 项目类别:
Integrated Platform for Discovery and Validation of Probes that Restore Protein Expression in Single-Gene Causes of Autism and Related Disorders
用于发现和验证可恢复自闭症及相关疾病单基因病因中蛋白质表达的探针的综合平台
- 批准号:
10371224 - 财政年份:2017
- 资助金额:
$ 72.16万 - 项目类别:
Integrated Platform for Discovery and Validation of Probes that Restore Protein Expression in Single-Gene Causes of Autism and Related Disorders
用于发现和验证可恢复自闭症及相关疾病单基因病因中蛋白质表达的探针的综合平台
- 批准号:
10153890 - 财政年份:2017
- 资助金额:
$ 72.16万 - 项目类别:
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