A multi-parametric high throughput assay for detecting beta-cell proliferation in dispersed primary islets

Area of Science:

• Endocrinology and Diabetes Research
• Cell Biology and Imaging
• Drug Discovery and Development

Background:

• Type 2 diabetes treatment requires restoring functional pancreatic beta-cell mass.
• Identifying compounds that induce beta-cell proliferation is challenging due to the rarity of islet cells.
• Existing methods lack the throughput and detail to screen for beta-cell proliferative agents effectively.

Purpose of the Study:

• To develop a high-throughput, multi-parametric imaging assay for identifying compounds that selectively enhance pancreatic beta-cell proliferation.
• To enable detailed analysis of drug effects on both beta and non-beta islet cells using high-content imaging.
• To provide a robust platform for discovering novel therapeutic small molecules for type 2 diabetes.

Main Methods:

• A 384-well plate-based, multi-parametric imaging assay was established for ex vivo primary islet proliferation.
• High-content microscopy and image analysis software were employed to capture and quantify cellular features.
• The assay was validated using known beta-cell proliferative agents like prolactin and harmine in mouse and rat islets.

Main Results:

• The assay successfully identified several compounds that promote beta-cell proliferation in a high-throughput format.
• Multi-parametric imaging provided insights into on-target and off-target effects within primary islet tissue.
• The protocol demonstrated the ability to collect high-quality cellular material for analysis.

Conclusions:

• The developed high-throughput assay is effective for discovering compounds that enhance beta-cell proliferation.
• This platform offers a valuable tool for advancing type 2 diabetes research and therapeutic development.
• Adaptations of the assay may allow for evaluation of other disease-relevant endpoints and cell types, though human beta-cell proliferation remains a challenge.