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Zhao F, Tang X, Guo D. In vivo monitoring of glutathione in a live rat brain based on the ratiometric signal output of 2D Cu-TCPP(Fe) nanosheets. Chem Commun (Camb) 2023; 59:10984-10987. [PMID: 37615037 DOI: 10.1039/d3cc03626j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Abstract
Herein, a novel ratiometric electrochemical platform was developed for in vivo analysis of GSH based on the dual signal output of 2D Cu-TCPP(Fe) nanosheets. Our method with high selectivity and high accuracy enabled GSH monitoring in a live rat brain, and accurate GSH concentrations were firstly reported in different brain regions upon global cerebral ischemia.
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Affiliation(s)
- Fan Zhao
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Binshui West Road 393, Tianjin 300387, P. R. China.
| | - Xuan Tang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Binshui West Road 393, Tianjin 300387, P. R. China.
| | - Dongqing Guo
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Binshui West Road 393, Tianjin 300387, P. R. China.
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Li D, Lv Y, Xia H, Huang J, Liu W, Yu J, Jing G, Liu W, Sun Y, Li W. Target-activated multivalent sensing platform for improving the sensitivity and selectivity of Hg2+ detection. Anal Chim Acta 2023; 1256:341123. [PMID: 37037627 DOI: 10.1016/j.aca.2023.341123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 03/17/2023] [Accepted: 03/18/2023] [Indexed: 04/03/2023]
Abstract
Sensitivity and selectivity are critical parameters to evaluate the performance of sensors. For trace detection, it remains a challenge to design a new sensor that achieves high sensitivity and selectivity simultaneously. Here, we present a target-activated dual Mg2+-dependent DNAzyme (MNAzyme) that served as a simple sensing model to explore the multivalency in improving the analytical sensitivity and selectivity for target detection. Mercury ion (Hg2+), a notorious toxic metal ion, was selected as a model target. In the presence of Hg2+, the thymine-rich regions of the hairpin probe and primer could hybridize to form a stable duplex via the thymine-Hg2+-thymine structure. Then, an intact enzyme sequence was exposed and two separate enzyme fragments were close to each other, generating a dual MNAzyme. Benefiting from the localized high-concentration of the enzyme strand, the dual MNAzyme showed a remarkable improvement in binding stability. The catalytic rate constant of the dual MNAzyme was theoretically 1.60 times higher than that of the monomeric counterpart, and the sensitivity and selectivity had 4.50 and 1.44-fold enhancement, respectively. When the dual MNAzyme was used for sensor applications, the limit of detection was determined to be 0.04 and 0.2 nM via UV-vis spectrophotometer and naked eye, respectively. Meanwhile, the method offered desirable selectivity toward Hg2+ against other metal ions. With the advantages of simple operation, high sensitivity, and desirable selectivity, the developed multivalent sensing platform could be easily expanded in the future for the on-site detection of other low-abundance analytes.
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Affiliation(s)
- Dongyan Li
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Yuxiong Lv
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Huaiyue Xia
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Jing Huang
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha, 410004, China
| | - Wenjie Liu
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Jianna Yu
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Guoxing Jing
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Wen Liu
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Yingying Sun
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China
| | - Wenshan Li
- College of Chemical Engineering, Xiangtan University, Xiangtan, 411105, China.
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Da Y, Luo S, Tian Y. Real-Time Monitoring of Neurotransmitters in the Brain of Living Animals. ACS APPLIED MATERIALS & INTERFACES 2023; 15:138-157. [PMID: 35394736 DOI: 10.1021/acsami.2c02740] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Neurotransmitters, as important chemical small molecules, perform the function of neural signal transmission from cell to cell. Excess concentrations of neurotransmitters are often closely associated with brain diseases, such as Alzheimer's disease, depression, schizophrenia, and Parkinson's disease. On the other hand, the release of neurotransmitters under the induced stimulation indicates the occurrence of reward-related behaviors, including food and drug addiction. Therefore, to understand the physiological and pathological functions of neurotransmitters, especially in complex environments of the living brain, it is urgent to develop effective tools to monitor their dynamics with high sensitivity and specificity. Over the past 30 years, significant advances in electrochemical sensors and optical probes have brought new possibilities for studying neurons and neural circuits by monitoring the changes in neurotransmitters. This Review focuses on the progress in the construction of sensors for in vivo analysis of neurotransmitters in the brain and summarizes current attempts to address key issues in the development of sensors with high selectivity, sensitivity, and stability. Combined with the latest advances in technologies and methods, several strategies for sensor construction are provided for recording chemical signal changes in the complex environment of the brain.
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Affiliation(s)
- Yifan Da
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Dongchuan Road 500, Shanghai 200241, China
| | - Shihua Luo
- Department of Traumatology, Rui Jin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200025, China
| | - Yang Tian
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Dongchuan Road 500, Shanghai 200241, China
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Zhao Y, Xia Y, Zhang J, Liu H, Yi Y, Zhu G. Ag-Ti3C2Tx MXenes nanoribbons coupled with carbon nanotubes: preparation, characterization and application for highly sensitive ratiometric voltammetric sensing of paracetamol. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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