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In Situ Electrochemical Generation Of Nitric Oxide For Neuronal Modulation
J. Park, Kyoungsuk Jin, Atharva Sahasrabudhe, Po-Han Chiang, Joseph H. Maalouf, Florian Koehler, Dekel Rosenfeld, Siyuan Rao, Tomo Tanaka, Tural Khudiyev, Zachary J. Schiffer, Y. Fink, O. Yizhar, Karthish Manthiram, P. Anikeeva
Published 2020 · Chemistry, Medicine
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Understanding the function of nitric oxide, a lipophilic messenger in physiological processes across nervous, cardiovascular and immune systems, is currently impeded by the dearth of tools to deliver this gaseous molecule in situ to specific cells. To address this need, we have developed iron sulfide nanoclusters that catalyse nitric oxide generation from benign sodium nitrite in the presence of modest electric fields. Locally generated nitric oxide activates the nitric oxide-sensitive cation channel, transient receptor potential vanilloid family member 1 (TRPV1), and the latency of TRPV1-mediated Ca 2+ responses can be controlled by varying the applied voltage. Integrating these electrocatalytic nanoclusters with multimaterial fibres allows nitric oxide-mediated neuronal interrogation in vivo. The in situ generation of nitric oxide in the ventral tegmental area with the electrocatalytic fibres evoked neuronal excitation in the targeted brain region and its excitatory projections. This nitric oxide generation platform may advance mechanistic studies of the role of nitric oxide in the nervous system and other organs. Iron sulfide nanoclusters enable on-demand and local generation of nitric oxide, an important lipophilic messenger in the brain, allowing the modulation and investigation of nitric oxide-triggered neural signalling events.
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