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首页> 外文期刊>Journal of Neuroscience Methods >Quantitative mapping analyzer for determining the distribution of neurochemicals in the human brain.
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Quantitative mapping analyzer for determining the distribution of neurochemicals in the human brain.

机译:定量映射分析仪,用于确定人脑中神经化学物质的分布。

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We developed a human brain mapping analyzer to determine the quantitative distribution of specific molecules, such as neurotransmitters or neuromodulators, based on a fluorescence microphotometry system that we had previously developed. The immunohistochemical fluorescence emitted from each microarea of a brain slice is collected into a photomultiplier tube through the pinhole and objective lens of a microscope. The brain slice is moved in the x- or y-direction by a motorized scanning stage under the objective lens, and the fluorescence intensities are measured quantitatively. The scanning speed is approximately 100 microareas/s, the maximum stage motion is 150 x 150 mm, and an unlimited amount of data can be gathered continuously by transfer to external memory devices. In this paper, this analyzer is characterized in detail, and the methods used for the preparation and analysis of human brain slices are described. As an example, the cholinergic distribution in hemispheric coronal slices of the adult human brain is analyzed. Each slice, immunohistochemically stained for choline acetyltransferase, was divided into approximately 3 million microareas (one area is 50 microm in diameter), and the distribution of the cholinergic neurons is shown.
机译:我们基于先前开发的荧光显微光度测定系统,开发了一种人脑定位分析仪来确定特定分子(例如神经递质或神经调节剂)的定量分布。从大脑切片的每个微区域发出的免疫组织化学荧光通过显微镜的针孔和物镜收集到光电倍增管中。通过物镜下的电动扫描台使脑切片在x或y方向上移动,并定量测量荧光强度。扫描速度约为100微区域/秒,最大载物台运动为150 x 150毫米,通过传输到外部存储设备可以连续收集无限量的数据。本文对这种分析仪进行了详细描述,并描述了用于制备和分析人脑切片的方法。例如,分析了成年人大脑半球冠状切片中的胆碱能分布。免疫组化染色的胆碱乙酰基转移酶染色的每个切片被分为大约300万个微区域(一个区域的直径为50微米),并显示了胆碱能神经元的分布。

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