Cited by 226Pancreatic function and diabetesIon channel regulation and functionConnexins and lens biology

The DOI matches its Crossref record; 32 of the 32 references it cites were found in a registry or an index.

Voltage‐gated and resting membrane currents recorded from B‐cells in intact mouse pancreatic islets

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Göpel, S., Kanno, T., Barg, S., Galvanovskis, J., Rorsman, P.·1999·The Journal of Physiology

Abstract

1. The perforated patch whole-cell configuration of the patch-clamp technique was applied to superficial cells in intact pancreatic islets. Immunostaining in combination with confocal microscopy revealed that the superficial cells consisted of 35 % insulin-secreting B-cells and 65 % non-B-cells (A- and D-cells). 2. Two types of cell, with distinct electrophysiological properties, could be functionally identified. One of these generated oscillatory electrical activity when the islet was exposed to 10 mM glucose and had the electrophysiological characteristics of isolated B-cells maintained in tissue culture. 3. The Ca2+ current recorded from B-cells in situ was 80 % larger than that of isolated B-cells. It exhibited significant (70 %) inactivation during 100 ms depolarisations. The inactivation was voltage dependent and particularly prominent during depolarisations evoking the largest Ca2+ currents. 4. Voltage-dependent K+ currents were observed during depolarisations to membrane potentials above -20 mV. These currents inactivated little during a 200 ms depolarisation and were unaffected by varying the holding potential between -90 and -30 mV. 5. The maximum resting conductance in the absence of glucose, which reflects the conductance of ATP-regulated K+ (KATP) channels, amounted to approximately 4 nS. Glucose produced a concentration-dependent reduction of KATP channel conductance with half-maximal inhibition observed with 5 mM glucose. 6. Combining voltage- and current-clamp…

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Crossref · 10.1111/j.1469-7793.1999.00717.x

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Metadata

Authors
Göpel, S., Kanno, T., Barg, S., Galvanovskis, J., & Rorsman, P.
Affiliations
Lund University (SE)
Venue
The Journal of Physiology
Publisher
Wiley
Published
1999-12
Volume
521
Issue
3
Pages
717-728
ISSN
  • 0022-3751 (ISSN-L)
  • 1469-7793
OpenAlex
W2017509811
Cited by
226
References
32
Citations by year
2026: 4 · 2025: 2 · 2024: 5 · 2023: 4 · 2022: 7 · 2021: 10 · 2020: 7 · 2019: 7 · 2018: 4 · 2017: 10 · 2016: 8 · 2015: 9 · 2014: 8 · 2013: 12 · 2012: 12
FWCI
5.27
Type
journal article
Language
en
Open access
Locations
  • The Journal of Physiology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Lund University Publications (Lund University) (submittedVersion)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Pancreatic function and diabetes
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion channel regulation and function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Connexins and lens biology
Keywords
pancreatic islets, B cells, voltage-gated calcium currents, voltage-dependent potassium current, ATP-sensitive potassium channels, electrical coupling, glucose stimulation, insulin secretion
MeSH terms
Algorithms, Animals, Cell Communication, Electrophysiology, Glucose, Islets of Langerhans, Membrane Potentials, Tetrodotoxin, Calcium Channels, Potassium Channels, Sodium Channels, Ion Channel Gating, Gap Junctions, Patch-Clamp Techniques, ATP-Binding Cassette Transporters, Microscopy, Confocal, Potassium Channels, Inwardly Rectifying, Mice, KATP Channels

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