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Title: Organic electrochemical transistor arrays for real-time mapping of evoked neurotransmitter release in vivo
Authors: Xie, K
Wang, N 
Lin, XD
Wang, ZX
Zhao, X
Fang, PL
Yue, HB
Kim, JW
Luo, J
Cui, SY
Yan, F 
Shi, P
Issue Date: 2020
Source: eLife, 11 Feb. 2020, v. 9, e50345, p. 1-19
Abstract: Though neurotransmitters are essential elements in neuronal signal transduction, techniques for in vivo analysis are still limited. Here, we describe an organic electrochemical transistor array (OECT-array) technique for monitoring catecholamine neurotransmitters (CA-NTs) in rat brains. The OECT-array is an active sensor with intrinsic amplification capability, allowing real-time and direct readout of transient CA-NT release with a sensitivity of nanomolar range and a temporal resolution of several milliseconds. The device has a working voltage lower than half of that typically used in a prevalent cyclic voltammetry measurement, and operates continuously in vivo for hours without significant signal drift, which is inaccessible for existing methods. With the OECT-array, we demonstrate simultaneous mapping of evoked dopamine release at multiple striatal brain regions in different physiological scenarios, and reveal a complex cross-talk between the mesolimbic and the nigrostriatal pathways, which is heterogeneously affected by the reciprocal innervation between ventral tegmental area and substantia nigra pars compacta.
Publisher: eLife Sciences Publications
Journal: eLife 
EISSN: 2050-084X
DOI: 10.7554/eLife.50345
Rights: © 2020, Xie et al. This article is distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use and redistribution provided that the original author and source are credited.
The following publication Xie, K., Wang, N., Lin, X. D., Wang, Z. X., Zhao, X., Fang, P. L., ... & Shi, P. (2020). Organic electrochemical transistor arrays for real-time mapping of evoked neurotransmitter release in vivo. Elife, 9, e50345, 1-19 is available at
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