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Li, Jinxing; Liu, Yuxin; Yuan, Lei; Zhang, Baibing; Bishop, Estelle Spear; Wang, Kecheng; Tang, Jing; Zheng, Yu-Qing; Xu, Wenhui; Niu, Simiao; Beker, Levent; Li, Thomas L; Chen, Gan; Diyaolu, Modupeola; Thomas, Anne-Laure; Mottini, Vittorio; Tok, Jeffrey B-H; Dunn, James C Y; Cui, Bianxiao; Pașca, Sergiu P; Cui, Yi; Habtezion, Aida; Chen, Xiaoke; Bao, Zhenan
Nature (London), 06/2022, Volume: 606, Issue: 7912Journal Article
Neurotransmitters play essential roles in regulating neural circuit dynamics both in the central nervous system as well as at the peripheral, including the gastrointestinal tract . Their real-time monitoring will offer critical information for understanding neural function and diagnosing disease . However, bioelectronic tools to monitor the dynamics of neurotransmitters in vivo, especially in the enteric nervous systems, are underdeveloped. This is mainly owing to the limited availability of biosensing tools that are capable of examining soft, complex and actively moving organs. Here we introduce a tissue-mimicking, stretchable, neurochemical biological interface termed NeuroString, which is prepared by laser patterning of a metal-complexed polyimide into an interconnected graphene/nanoparticle network embedded in an elastomer. NeuroString sensors allow chronic in vivo real-time, multichannel and multiplexed monoamine sensing in the brain of behaving mouse, as well as measuring serotonin dynamics in the gut without undesired stimulations and perturbing peristaltic movements. The described elastic and conformable biosensing interface has broad potential for studying the impact of neurotransmitters on gut microbes, brain-gut communication and may ultimately be extended to biomolecular sensing in other soft organs across the body.
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