Volume 63, Issue 12 e202318973
Research Article

A Potentiometric Dual-Channel Microsensor Reveals that Fluctuation of H2S is Less pH-Dependent During Spreading Depolarization in the Rat Brain

Rantong Liu

Rantong Liu

Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing, 100872 China

College of Petroleum and Environment Engineering, Yan'an University, Shaanxi Yan'an, 716000 China

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Shuai Zhang

Shuai Zhang

Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing, 100872 China

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Hui Zeng

Hui Zeng

Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing, 100872 China

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Nan Gao

Nan Gao

Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing, 100872 China

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Yongyue Yin

Yongyue Yin

Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing, 100872 China

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Prof. Meining Zhang

Corresponding Author

Prof. Meining Zhang

Key Laboratory of Advanced Light Conversion Materials and Biophotonics, Department of Chemistry, Renmin University of China, Beijing, 100872 China

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Prof. Lanqun Mao

Corresponding Author

Prof. Lanqun Mao

College of Chemistry, Beijing Normal University, Beijing, 100875 China

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First published: 25 January 2024
Citations: 4

Graphical Abstract

Understanding the mechanism of spreading depolarization (SD) is essential for the therapy of SD associated diseases. We report a potentiometric dual-channel microsensor for simultaneous detection of H2S and pH, enabling the first observation of H2S fluctuation induced by SD in vivo. Our work provides the direct experimental evidence that the H2S release during SD in rat cortex is less pH-dependent, possibly by modulating enzyme-dependent pathways.

Abstract

Spreading depolarization (SD) is one of the most common neuropathologic phenomena in the nervous system, relating to numerous diseases. However, real-time monitoring the rapid chemical changes during SD to probe the molecular mechanism remains a great challenge. We develop a potentiometric dual-channel microsensor for simultaneous monitoring of H2S and pH featuring excellent selectivity and spatiotemporal resolution. Using this microsensor we first observe real time changes of H2S and pH in the rat brain induced by SD. This changes of H2S are completely suppressed when the rat pre-treats with aminooxyacetic acid (AOAA), a blocker to inhibit the H2S-producing enzyme, indicating H2S fluctuation might be related to enzyme-dependent pathway during SD and less pH-dependent. This study provides a new perspective for studying the function of H2S and the molecular basis of SD-associated diseases.

Conflict of interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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