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Related Experiment Video

Updated: Feb 7, 2026

Analysis of Beta-cell Function Using Single-cell Resolution Calcium Imaging in Zebrafish Islets
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Analysis of Beta-cell Function Using Single-cell Resolution Calcium Imaging in Zebrafish Islets.

Sharan Janjuha1, Sumeet Pal Singh2, Nikolay Ninov3

  • 1Center for Molecular and Cellular Bioengineering, TU Dresden; Paul Langerhans Institute Dresden of the Helmholtz Center Munich at the University Hospital Carl Gustav Carus of TU Dresden.

Journal of Visualized Experiments : Jove
|July 24, 2018
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Summary

Researchers developed a new method to monitor calcium levels in zebrafish pancreatic beta-cells. This technique reveals how these cells respond to glucose, offering insights into diabetes and beta-cell function.

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Area of Science:

  • Endocrinology and Metabolism
  • Cell Biology
  • Zebrafish Models

Background:

  • Pancreatic beta-cells secrete insulin in response to blood glucose, and their dysfunction causes hyperglycemia.
  • Monitoring intracellular calcium dynamics is crucial for understanding beta-cell function and insulin secretion.
  • Genetic and environmental factors influencing beta-cell dysfunction require investigation for improved diabetes treatments.

Purpose of the Study:

  • To describe a novel protocol for monitoring glucose-stimulated calcium influx in zebrafish beta-cells.
  • To investigate functional heterogeneity among beta-cells within the same islet.
  • To explore the potential of zebrafish as a model for studying beta-cell function and dysfunction.

Main Methods:

  • Utilized GCaMP6s, a genetically encoded calcium sensor, for monitoring intracellular calcium dynamics.
  • Employed ex vivo mounted zebrafish islets for single-cell resolution imaging.
  • Applied varying glucose concentrations to assess glucose-stimulated calcium influx and insulin secretion response.

Main Results:

  • Successfully monitored glucose-stimulated calcium influx in individual zebrafish beta-cells with high temporal and spatial resolution.
  • Observed oscillatory patterns in calcium influx upon glucose stimulation, indicating dynamic cellular responses.
  • Demonstrated functional heterogeneity among beta-cells within the same islet under different glucose conditions.

Conclusions:

  • The developed GCaMP6s-based method provides a powerful tool for studying beta-cell physiology in zebrafish.
  • The findings highlight functional heterogeneity in beta-cells, suggesting complex regulatory mechanisms.
  • This approach facilitates future research into genetic and environmental factors affecting beta-cell function and diabetes.