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Related Experiment Video

Updated: Jun 9, 2025

A Multi-Parametric Islet Perifusion System within a Microfluidic Perifusion Device

A Multi-Parametric Islet Perifusion System within a Microfluidic Perifusion Device

Published on: January 26, 2010

Unveiling islet heterogeneity using an automated microfluidic imaging system.

James Thornham¹, Richard Bertram^1,2,3, Michael G Roper^4,5

¹Program in Molecular Biophysics, Institute of Molecular Biophysics, Florida State University, Tallahassee, FL, 32304, USA.

Scientific Reports

|October 21, 2024

Summary

This study introduces a microfluidic device to measure individual islet responses, revealing significant heterogeneity in diazoxide response, unlike glucose response, crucial for understanding diabetes mellitus progression.

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Last Updated: Jun 9, 2025

A Multi-Parametric Islet Perifusion System within a Microfluidic Perifusion Device

A Multi-Parametric Islet Perifusion System within a Microfluidic Perifusion Device

Published on: January 26, 2010

Imaging Calcium Dynamics in Subpopulations of Mouse Pancreatic Islet Cells

Imaging Calcium Dynamics in Subpopulations of Mouse Pancreatic Islet Cells

Published on: November 26, 2019

Computer-assisted Large-scale Visualization and Quantification of Pancreatic Islet Mass, Size Distribution and Architecture

Computer-assisted Large-scale Visualization and Quantification of Pancreatic Islet Mass, Size Distribution and Architecture

Published on: March 4, 2011

Area of Science:

Endocrinology
Biomedical Engineering
Cell Biology

Background:

Islets of Langerhans are key therapeutic targets for diabetes and prediabetes.
Ensemble measurements obscure critical islet population heterogeneity, impacting therapeutic efficacy and disease progression.
Understanding individual islet responses is vital for effective diabetes treatment.

Purpose of the Study:

To develop and validate a microfluidic device for assessing individual islet responses to stimuli.
To quantify heterogeneity in Islets of Langerhans' responses to glucose and diazoxide.
To compare ensemble versus individual islet responses to therapeutic agents.

Main Methods:

A novel microfluidic device with four independent chambers was designed for precise stimulant delivery.
Individual and ensemble EC50/IC50 measurements were performed on murine islets using glucose and diazoxide.
Stimulant concentration accuracy between chambers was validated to be less than 1% error.

Main Results:

Glucose EC50 measurements showed minimal heterogeneity, with individual islet values close to the ensemble mean (7.4 mM).
Diazoxide application revealed significant heterogeneity, with 37% of islets exhibiting IC50 values deviating >10% from the ensemble mean (10.2 μM).
The system demonstrated high accuracy and precision in delivering stimuli to individual islets.

Conclusions:

The developed microfluidic system effectively identifies heterogeneity in islet cell populations.
Islet heterogeneity significantly impacts responses to certain therapeutic agents like diazoxide, but not uniformly to glucose.
This platform is applicable for studying cellular heterogeneity in various cell types beyond pancreatic islets.