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Updated: May 1, 2026
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Longitudinal In Vivo Imaging and Quantification of Human Pancreatic Islet Grafting and Contributing Host Cells in the Anterior Eye Chamber
Published on: June 11, 2020
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Long-term culture and functionality of pancreatic islets monitored using microelectrode arrays
Sven Schönecker1, Udo Kraushaar, Martina Düfer
1NMI Natural and Medical Sciences Institute at the University of Tübingen, Department of Electrophysiology, Markwiesenstraße 55, D-72770 Reutlingen, Germany.
Summary
Microelectrode array recordings enable long-term monitoring of mouse islet of Langerhans electrical activity. This technique can assess beta-cell function, drug effects, and oxidative stress relevant to type 2 diabetes mellitus.
Area of Science:
- Electrophysiology
- Cell Biology
- Diabetes Research
Background:
- Understanding beta-cell function is crucial for diabetes mellitus research.
- Oxidative stress contributes to type 2 diabetes mellitus pathogenesis.
- Long-term monitoring of islet electrophysiology is needed.
Purpose of the Study:
- To establish microelectrode array (MEA) recording for long-term mouse islet electrophysiology.
- To assess MEA's ability to detect concentration-dependent drug effects.
- To characterize beta-cell alterations during prolonged culture and oxidative stress.
Main Methods:
- Extracellular recording of glucose-induced electrical activity from mouse islets of Langerhans using MEAs.
- Long-term culture of islets on MEAs for up to 34 days.
- Assaying beta-cell damage induced by hydrogen peroxide (H2O2) and evaluating protection by tempol.
Main Results:
- Successfully recorded stable beta-cell membrane potential oscillations for up to 34 days.
- Glucose dependence of electrical activity remained consistent over one month.
- H2O2 reduced electrical activity concentration-dependently; tempol provided protection.
Conclusions:
- MEA recordings provide a robust method for long-term ex vivo monitoring of islet electrophysiology.
- The technique can assess beta-cell responses to oxidative stress and potential protective agents.
- This work enables future studies on diabetes-inducing agents and interventions in beta-cells.
