Measurement of intact quantal packet of transmitters released from single nerve terminal by loose-patch amperometry
Abstract
Neuronal information is majorly encoded chemically at synapses and the elementary unit of synaptic transmission is the contents of neurotransmitter released from single vesicle. However, the contents of quantal neurotransmitter have never been precisely estimated at synapses, which largely prevent our understanding the nature of quantal neurotransmitter release and its impact on neuronal information processing. In order to break through the technical bottleneck of precisely counting quantal neurotransmitter molecules, we developed a new approach in combination of electrophysiology and electrochemistry to measure intact quantal content of single vesicles. An etched submicro-carbon fiber electrode for electrochemical detection was designed to be enclosed in an electrophysiologically used glass pipette. The glass pipette allowed the electrochemical electrode to access the release site, and amperometric recordings were made within the enclosed space at the electrophysiological loose-patch mode. Our study showed that the intact quantal release could be successfully detected at the dopaminergic varicosities by this loose-patch amperometric measurement in real time with negligible leakage.
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A level of 5× the RMS of noise at baseline was set as the threshold for signal detection.
“A level of 5× the RMS of noise at baseline was set as the threshold for signal detection(Chen et al., 2021).”
From Intestinal microbiota modulates adrenomedullary response through Nod1 sensing in chromaffin cells (2021) · cites this paper as Chen et al., 2021
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Intestinal microbiota modulates adrenomedullary response through Nod1 sensing in chromaffin cells
Xiang, C., Chen, P., Zhang, Q., Li, Y., Pan, Y., Xie, W., Sun, J., & Liu, Z. (2021) · iScience · doi:10.1016/j.isci.2021.102849 · Cited by 15 · see citing works
Self-citation
- Authors
- Chen, P., Shen, X., Zhao, S., Liu, Z., Zhu, Q., Zhu, T., Zhang, S., Li, Y., Mao, L., & Sun, J.
- Affiliations
- Chinese Academy of Sciences (CN)
- Southern University of Science and Technology (CN)
- Corresponding author
- Shen, Xuefeng
- Sun, Jianyuan
- Venue
- Biosensors and Bioelectronics
- Publisher
- Elsevier BV
- Published
- 2021-06
- Volume
- 181
- Pages
- 113143
- ISSN
- 0956-5663 (ISSN-L)
- OpenAlex
- W3133933571
- Cited by
- 5
- References
- 38
- Citations by year
- 2024: 1 · 2022: 3 · 2021: 1
- FWCI
- 0.49
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Biosensors and Bioelectronics (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Ministry of Science and Technology of the People's Republic of China
- Chinese Academy of Sciences
- Chinese Academy of Sciences Youth Innovation Promotion Association
- National Natural Science Foundation of China
- National Natural Science Foundation of China-Guangdong Joint Fund
- Topics
- Physical Sciences › Chemistry › Electrochemistry › Electrochemical Analysis and Applications
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Electrochemical sensors and biosensors
- Keywords
- amperometry, synaptic transmission, neurotransmitter quantification
- MeSH terms
- Synaptic Transmission, Neurons, Synapses, Biosensing Techniques, Neurotransmitter Agents
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