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A Scalable N x N Electrochemical Detector Array Platform for Analysis of Quantal

用于量子分析的可扩展 N x N 电化学检测器阵列平台

基本信息

批准号：
8660337
负责人：
Manfred LINDAU
金额：
$ 37.38万
依托单位：
CORNELL UNIVERSITY
依托单位国家：
美国
项目类别：
财政年份：
2011
资助国家：
美国
起止时间：
2011-09-01 至 2016-04-30
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/8660337
关键词：
Adrenal Glands Affect Amplifiers Binding Biological Assay Botox Brain Catecholamines Cell Communication Cell Count Cell Size Cells ChIP-on-chip Characteristics Chromaffin Cells Cosmetics Cytoplasmic Granules Deposition Development Dopamine Electrodes Event Exocytosis Extracellular Space Frequencies Goals Hormones Individual Industry Kinetics Levodopa Measurement Measures Medical Membrane Methods Microelectrodes Microscopic Modification Molecular Names Neurobiology Neurons Neurotransmitters Noise Norepinephrine Organelles PC12 Cells Parkinson Disease Performance Pharmaceutical Preparations Positioning Attribute Process Property Proteins Regulation Research Resolution Semiconductors Series Serotonin Signal Transduction Signaling Molecule Solutions Surface Technology Testing Time Vesicle Work base carbon fiber detector dopaminergic neuron drug discovery interest meetings neurotransmitter release novel response sensor

项目摘要

DESCRIPTION (provided by applicant): The goal of this project is the development of a scalable n x n electrochemical detector array platform with on- chip amplifiers for massively parallel recordings of quantal transmitter release events. The neurobiological process that this assay will analyze is the process of exocytosis and transmitter release, one of the key processes in brain function and beyond. The molecules to be released are stored at high concentration in membrane-bound organelles. Upon stimulation the contents of these vesicles are released in quantal events through a fusion pore that connects the vesicular lumen to the extracellular space. Understanding the mechanisms of vesicle fusion and transmitter release is of broad medical significance. In the treatment of Parkinson's disease the drug levodopa increases dopamine release from the reduced number of dopaminergic neurons. On the other hand, BoTox treatment exerts its effect through the reduction of transmitter release. In addition to these examples, many other drugs and many molecular manipulations modulate transmitter release in various ways. This regulation of transmitter release occurs not only via changing the number or frequency of quantal release events but also via modulation of quantal size and of the kinetics of release from individual vesicles. To understand the mechanism by which a specific manipulation affects transmitter release it is therefore necessary to perform precise measurements of individual quantal release events, analyze their amplitude and time course and derive characteristic parameters. Conventionally, such measurements are performed by positioning a carbon fiber microelectrode close to a cell (such as a chromaffin cell, a dopaminergic or serotonergic neuron or a PC12 cell) under microscopic observation, stimulate the cell and record a series of release events. The technology developed in this project is adapted from the semiconductor industry and involves the development of a CMOS microelectronic chip for on-chip recordings of single quantal release events of oxidizable transmitter molecules such as noradrenaline, dopamine, or serotonin. The technology will allow the simultaneous recording of single vesicle release events from hundreds of cells without the need for microscopic observation and manipulation, and will thereby provide a high-throughput platform to characterize molecular and pharmacological manipulations. The technology will accelerate the research aimed at understanding the molecular mechanisms of transmitter release and its modulation as well as the development and testing of treatments that act through the modulation of transmitter release. In this way this novel assay platform would provide opportunities to measure quantal release events as neurobiological endpoints and will provide a pipeline for target identification and drug discovery.

描述（由申请人提供）：该项目的目标是开发一个可扩展的 n x n 电化学探测器阵列平台，带有片上放大器，用于大规模并行记录量子发射器释放事件。该测定将分析的神经生物学过程是胞吐作用和递质释放的过程，这是大脑功能及其他功能的关键过程之一。待释放的分子以高浓度储存在膜结合的细胞器中。受到刺激后，这些囊泡的内容物通过连接囊泡腔与细胞外空间的融合孔在量子事件中释放。了解囊泡融合和递质释放的机制具有广泛的医学意义。在帕金森病的治疗中，药物左旋多巴可增加数量减少的多巴胺能神经元释放多巴胺。另一方面，Botox治疗通过减少递质释放来发挥作用。除了这些例子之外，许多其他药物和许多分子操作以各种方式调节递质释放。这种递质释放的调节不仅通过改变量子释放事件的数量或频率来实现，而且还通过调节量子大小和单个囊泡释放的动力学来实现。因此，为了了解特定操作影响发射器释放的机制，有必要对各个量子释放事件进行精确测量，分析其幅度和时间过程并导出特征参数。传统上，此类测量是通过在显微镜观察下将碳纤维微电极靠近细胞（例如嗜铬细胞、多巴胺能或血清素能神经元或PC12细胞）放置，刺激细胞并记录一系列释放事件来进行。该项目开发的技术改编自半导体行业，涉及开发 CMOS 微电子芯片，用于片上记录可氧化递质分子（如去甲肾上腺素、多巴胺或血清素）的单量子释放事件。该技术将允许同时记录数百个细胞的单个囊泡释放事件，而无需显微镜观察和操作，从而提供一个高通量平台来表征分子和药理学操作。该技术将加速旨在了解递质释放及其调节的分子机制的研究，以及通过调节递质释放发挥作用的治疗方法的开发和测试。通过这种方式，这种新颖的检测平台将提供测量量子释放事件作为神经生物学终点的机会，并将为目标识别和药物发现提供管道。

项目成果

期刊论文数量（4）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Non-Faradaic Electrochemical Detection of Exocytosis from Mast and Chromaffin Cells Using Floating-Gate MOS Transistors.

使用浮栅 MOS 晶体管对肥大细胞和嗜铬细胞胞吐作用进行非法拉第电化学检测。

DOI：
10.1038/srep18477
发表时间：
2015
期刊：
Scientific reports
影响因子：
4.6
作者：
Jayant,Krishna;Singhai,Amit;Cao,Yingqiu;Phelps,JoshuaB;Lindau,Manfred;Holowka,DavidA;Baird,BarbaraA;Kan,EdwinC
通讯作者：
Kan,EdwinC

Estimating amperometric spike parameters resulting from quantal exocytosis using curve fitting seeded by a matched-filter algorithm.

使用由匹配滤波器算法播种的曲线拟合来估计由量子胞吐作用产生的电流尖峰参数。