Domain-specific inhibition of angiotensin-converting enzyme as a therapeutic strategy for opioid use disorders

血管紧张素转换酶的域特异性抑制作为阿片类药物使用障碍的治疗策略

• 批准号: 10512191
• 负责人: Swati S More
• 金额: $ 177.18万
• 依托单位: UNIVERSITY OF MINNESOTA
• 依托单位国家: 美国
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-07-01 至 2025-06-30
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/10512191
• 关键词: Address; Affinity; Angiotensin I; Angiotensin II; Angiotensin-Converting Enzyme Inhibitors; Angiotensins; Antihypertensive Agents; Behavioral; Biological Assay; Blood - brain barrier anatomy; Brain; C-terminal; Captopril; Cardiovascular system; Catalytic Domain; Cells; Chemicals; Clinical; Collaborations; DNA Sequence Alteration; Data; Dependence; Dissociation; Dopamine Receptor; Drug Delivery Systems; Drug Exposure; Drug Kinetics; Enkephalins; Enzyme Inhibition; Fentanyl; Genetic; Glutamates; Goals; Hypertension; In Vitro; Infusion procedures; Intravenous; Investigation; Lead; Liquid Chromatography; Measures; Mediating; Metabolic; Methionine Enkephalin; Modification; Motor; Mus; Mutation; N Domain; N-terminal; National Institute of Drug Abuse; Neurons; Nucleus Accumbens; Opioid; Pathway interactions; Peptidyl-Dipeptidase A; Peripheral; Permeability; Pharmaceutical Chemistry; Pharmaceutical Preparations; Pharmacology; Presynaptic Terminals; Principal Investigator; Probability; Prodrugs; Property; Publishing; Recombinant Proteins; Regulation; Research; Rewards; Risk; Role; Schedule; Self Administration; Signal Transduction; Substance Use Disorder; Substrate Specificity; Synaptic Transmission; System; Testing; Therapeutic; Tissues; Transgenic Mice; Wild Type Mouse; addiction; brain tissue; conditioned place preference; drug development; endogenous opioids; experimental study; extracellular; improved; inhibitor; mu opioid receptors; novel; novel therapeutic intervention; novel therapeutics; opioid use disorder; patch clamp; phenylalanylarginine; presynaptic; prevent; side effect; substance use treatment; tandem mass spectrometry; tool; translational potential

ABSTRACT This project combines the mutual expertise of Drs. Patrick Rothwell and Swati More (Principal Investigators) in nucleus accumbens opioid signaling and medicinal chemistry. As part of an ongoing collaboration supported by NIDA (R21 DA050120), we have found that angiotensin-converting enzyme (ACE) has a non-canonical function in the nucleus accumbens: it degrades Met-enkephalin-Arg-Phe (MERF) and thereby regulates endogenous opioid signaling. Conventional ACE inhibitors block the degradation of MERF, leading to an enhancement of endogenous opioid signaling in the nucleus accumbens. This causes a selective reduction of glutamate release onto medium spiny projection neurons that express the Drd1 dopamine receptor (D1-MSNs), which express ACE at a higher level than other neurons. This mechanism of action has great therapeutic potential, as our preliminary data indicate the decrease in excitatory drive to D1-MSNs can diminish the rewarding effects of fentanyl. Previously published enzymatic assays using recombinant protein suggest that MERF is efficiently degraded by the catalytic N-domain of ACE, though this has not been examined in brain tissue. This raises the exciting possibility of a double-dissociation between catalytic domains of ACE that degrade angiotensin (C-domain) and MERF (N-domain). The goal of this project is to independently evaluate the contribution of each ACE catalytic domain to MERF degradation and endogenous opioid signaling in the nucleus accumbens, in order to generate new domain-specific ACE inhibitors with optimized properties for treatment of opioid use disorders. We will use mice as an experimental system to separately manipulate each catalytic domain of ACE, through a combination of complementary genetic and pharmacological manipulations. AIM 1 is to determine which catalytic domain of ACE degrades MERF in nucleus accumbens tissue. We will directly quantify extracellular levels of MERF using liquid chromatography-tandem mass spectrometry, and measure excitatory synaptic transmission using whole-cell patch-clamp recordings from nucleus accumbens neurons. AIM 2 is to determine the behavioral impact of domain-specific ACE inhibition on fentanyl CPP and self-administration. This will build on our preliminary experiments using non-contingent fentanyl exposure (CPP), by incorporating parallel analysis of intravenous fentanyl self-administration on an intermittent access schedule. AIM 3 is to optimize the central activity and drug-like properties of domain-specific ACE inhibitors. We will perform systematic chemical iterations involving (but not limited to) prodrug and drug delivery systems, with the goal of improving permeability across the blood-brain barrier. These experiments should result in the identification and early optimization of compounds that inhibit degradation of MERF by ACE in the brain. This novel mechanism could form the basis of a viable new therapeutic strategy for treating opioid use disorders.

抽象的 该项目结合了Drs的相互专业知识。 Patrick Rothwell和Swati More（主要调查员） 伏隔核阿片类药物信号传导和药物化学。作为正在进行的合作的一部分 NIDA（R21 DA050120），我们发现血管紧张素转换酶（ACE）具有非典型功能 在伏隔核中：它降解了含有的源自脑链蛋白 - arg-phe（merf），从而调节内源性 阿片类药物信号传导。常规ACE抑制剂阻止了Merf的降解，从而增强了 伏隔核中的内源性阿片类药物信号传导。这会导致谷氨酸释放的选择性减少 在表达DRD1多巴胺受体（D1-MSN）的培养基投影神经元上，表达ACE 比其他神经元更高。这种作用机制具有巨大的治疗潜力，作为我们的初步 数据表明，兴奋性驱动到D1-MSN的减少可以减少芬太尼的奖励作用。 先前使用重组蛋白发表的酶试验表明，Merf有效地降解 ACE的催化N域，尽管尚未在脑组织中进行检查。这引起了令人兴奋的 降解血管紧张素（C-域）和 merf（n域）。该项目的目的是独立评估每种ACE催化的贡献 为了产生域中的域降解和内源性阿片类药物信号传导的结构域 具有优化特性的新域特异性ACE抑制剂，用于治疗阿片类药物使用障碍。我们将使用 小鼠作为实验系统，通过组合分别操纵ACE的每个催化域 补充遗传和药理操作。目标1是确定哪个催化域 Ace降解伏隔核组织中的Merf。我们将直接量化细胞外的Merf水平 使用液相色谱串联质谱法，并使用 来自伏伏核神经元的全细胞斑块钳记录。目标2是确定行为 域特异性ACE抑制对芬太尼CPP和自我管理的影响。这将基于我们的 使用非征服者芬太尼暴露（CPP）进行初步实验，并通过合并对 静脉内芬太尼在间歇性访问时间表上进行自我管理。目标3是优化中央 域特异性ACE抑制剂的活性和类似药物样性能。我们将执行系统化学化学 涉及（但不限于）前药和药物输送系统的迭代，目的是提高渗透率 穿过血脑屏障。这些实验应导致识别和早期优化 ACE在大脑中抑制Merf降解的化合物。这种新颖的机制可以构成基础 可行的新治疗策略，用于治疗阿片类药物使用障碍。

项目成果

Modulation of endogenous opioid signaling by inhibitors of puromycin sensitive aminopeptidase.

嘌呤霉素敏感氨肽酶抑制剂调节内源性阿片类信号传导。

• DOI: 10.1101/2024.04.02.587756
• 发表时间: 2024
• 期刊: bioRxiv : the preprint server for biology
• 作者: Singh,Rohit;Jiang,Rongrong;Williams,Jessica;Dobariya,Prakashkumar;Hanak,Filip;Xie,Jiashu;Rothwell,PatrickE;Vince,Robert;More,SwatiS
• 通讯作者: More,SwatiS