Peripherally restricted α2/δ-1 subunit ligands that modulate CaV channel gating as novel antiarrhythmic drugs
Peripherally restricted α2/δ-1 subunit ligands that modulate CaV channel gating as novel antiarrhythmic drugs
批准号:
9406676
负责人:
Uwe Klein
金额:
$22.49万
依托单位:
依托单位国家:
美国
项目类别:
财政年份:
2017
资助国家:
美国
项目状态:
已结题
起止时间:
2017-08-01 至 2019-01-31
关键词:
Active Biological TransportAddressAdverse effectsAffinityAmericanAmino Acid Transport System AAmino AcidsAnti-Arrhythmia AgentsApplications GrantsBackBindingBioavailableBiological AssayBlood - brain barrier anatomyBlood CirculationCaco-2 CellsCalcium ChannelCardiacCardiovascular systemCause of DeathCellsChronicClassificationComputer SimulationDizzinessDoseDrug EffluxElectrophysiology (science)GoalsHealthHeartHumanIn VitroKnowledgeLaboratory ResearchLigandsMediatingMemory LossModelingMusMuscle CellsOralOryctolagus cuniculusOxidative StressP-GlycoproteinPerformancePeripheralPharmaceutical PreparationsPharmacotherapyPreventionPreventivePropertyPumpRattusRegulationRiskSedation procedureSeriesSiteSmall Business Innovation Research GrantTestingTherapeuticVentricularVentricular FibrillationVentricular TachycardiaWorkXenopus oocytebasedesignefflux pumpin vivointraperitonealmembernovelnovel therapeuticspatch clamppredictive modelingpreventradioligandscreeningsmall moleculesudden cardiac deathvirtualvoltage
中文摘要
摘要:
心脏猝死(SCD)是由室性心动过速(室性心动过速)和室颤(VT/VF)引起的,是世界范围内的主要疾病。
健康问题是每年约30万美国人的生命问题。目前的抗心律失常药物安非他明(AAD)。
控制VT/VF的治疗方法主要是经验性的,效果不佳,有相当大的致心律失常的风险。
效果。尽管仍有相当大的需求尚未得到满足,但对新的、安全的、有效的AADS系统的需求仍未得到满足,这将特别针对美国的目标。
电生理技术是VT/VF治疗的基础,而不会损害心脏功能。我们的下一个目标是更好地发现。
并将开发一种更小分子的抗心律失常药物,它将无法满足这一迫切需求。
加州大学洛杉矶分校心血管疾病研究和实验室的成员,Hrayr博士和Riccardo博士,Olcese,。
最近,他们提出了我们对电压依赖钙离子的主要功能和调控机制的更多理解。
通过使用α2δ-1亚基来研究CaV1.2通道,以及如何通过对CAV1.2门控电路的调制来降低由触发的VT/VF。
早期和后期去极化(EADS)。他们可能已经证明了加巴喷丁类药物的疗效,如CaV1.2。
渠道门控、药物和药物的应用揭示了它们潜在的治疗药物应用。然而,
虽然加巴喷丁很有效,但它也会产生一些不良的、由中央调节的副作用,这是必须避免的。
避免了在一个长期服用AAD的耐受性良好的情况下使用。但这个目标是可以通过改进AAD的设计来实现的。
外围限制了α2δ-1的配体,即具有口服生物利用度但不是中心渗透性的化合物。
我们的目标是发现这一点。
在前期工作中,Numerate已经建立了一些预测性和计算性模型,用于将绑定到α2δ-1的数据和数据作为一种数据。
这种药物的底物是外排泵P-糖蛋白(P-gp)。这些新的模型将使我们能够高效地识别。
这些化合物很可能在外围受到限制,包括高亲和力的配体,用于α2δ-1上的Gabapentinid结合位点。
在硅胶屏幕上初步发现了900万种可用于商业用途的化合物,并从一系列化合物中鉴定出了这一点。
预计他们将成为α2δ基因通道亚基的配体,这些基因和蛋白也具有极高的被取代的可能性。
外围受到限制。我们将从这个屏幕上选择一些化合物进行测试。
在这份报告中,SBIR将资助一项提案,该提案建议与Hrayr博士、Karagueuzian博士和Riccardo博士继续合作。
奥尔塞斯在加州大学洛杉矶分校心血管疾病研究和实验室工作,以便(1)发现它们的高亲和力,包括外围。
受限制的α2δ-1配基,和(2)将展示其对CaV1.2通道门控信号进行快速调制和抑制的能力。
EAD-在基于细胞分析的基础上触发了VT/VF,并建立了一个完整的隔离心脏模型。
英文摘要
Abstract
Sudden Cardiac Death (SCD) caused by ventricular tachycardias and fibrillation (VT/VF) is a major world-wide
health problem claiming the lives of some 300,000 Americans each year. Current antiarrhythmic drug (AAD)
therapy to control VT/VF is largely empirical and poorly efficacious with considerable risk of proarrhythmic
effects. There remains considerable unmet need for new, safe and effective AADs that specifically target the
electrophysiological underpinnings of VT/VF without compromising cardiac function. Our goal is to discover
and develop a small molecule antiarrhythmic drug that will address this need.
Members of the Cardiovascular Research Laboratory at UCLA, Drs. Hrayr Karagueuzian and Riccardo Olcese,
have recently advanced our understanding of the functional regulation of the voltage dependent calcium
channel CaV1.2 by the α2δ-1 subunit, and how modulation of CaV1.2 gating can reduce VT/VF triggered by
early afterdepolarizations (EADs). They have also demonstrated the effect of gabapentinoids as CaV1.2
channel gating modifiers, and with this uncovered their potential therapeutic application as AADs. However,
while efficacious, gabapentinoids also produce undesirable centrally mediated side effects that must be
avoided in a well-tolerated chronically dosed AAD. This goal can be achieved through the design of
peripherally restricted α2δ-1 ligands, i.e., compounds that are orally bioavailable but not centrally penetrant,
which we aim to discover.
In preliminary work, Numerate has built predictive computational models for binding to α2δ-1 and for being a
substrate for the drug efflux pump P-glycoprotein (P-gp). These models will allow us to efficiently identify
compounds that are likely to be peripherally restricted, high-affinity ligands for the gabapentinoid site on α2δ-1.
An initial in silico screen of 9 million commercially available compounds identified a series of compounds that
are predicted to be ligands for the α2δ channel subunit, and that also have a high likelihood of being
peripherally restricted. We will select compounds from this screen for testing.
In this SBIR grant proposal Numerate proposes to collaborate with Drs. Hrayr Karagueuzian and Riccardo
Olcese at the UCLA Cardiovascular Research Laboratory in order to (1.) discover high-affinity, peripherally
restricted α2δ-1 ligands, and (2.) demonstrate their ability to modulate CaV1.2 channel gating and suppress
EAD-triggered VT/VF in cell based assays and an isolated intact heart model.
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批准号:9464548
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项目类别:
-
资助金额:$22.49万
-
财政年份:2017
-
负责人:Uwe Klein
-
依托单位:
海外基金