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Updated: Oct 9, 2025
A High-content In Vitro Pancreatic Islet β-cell Replication Discovery Platform
Published on: July 16, 2016
Induction of ß Cell Replication by Small Molecule-Mediated Menin Inhibition and Combined PKC Activation and TGF‑ß
Saghar Pahlavanneshan1, Mehrdad Behmanesh1, Yaser Tahamtani2
1Department of Genetics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran.
Objective:
Pancreatic β cells are recognized as central players in the pathogenesis of types 1 and 2 diabetes. Efficient and robust primary culture methods are required to interrogate β cell biology and screen potential anti-diabetic therapeutics. The aim of this study was to refine monolayer culture of beta cells and to investigate potential inducers of beta cell proliferation.
Materials And Methods:
In this experimental study, we compared different culture methods to optimize conditions required for a monolayer culture of rat pancreatic islet cells in order to facilitate image analysis-based assays. We also used the refined culture method to screen a group of rationally selected candidate small molecules and their combinations to determine their potential proliferative effects on the β cells.
Results:
Ham's F10 medium supplemented with 2% foetal bovine serum (FBS) in the absence of any surface coating provided a superior monolayer β cell culture, while other conditions induced fibroblast-like cell growth or multilayer cell aggregation over two weeks. Evaluation of candidate small molecules showed that a menin inhibitor MI-2 and a combination of transforming growth factor-β (TGF-β) inhibitor SB481542 and protein kinase C (PKC) activator indolactam V (IndV) significantly induced replication of pancreatic β cells.
Conclusion:
Overall, our optimized culture condition provided a convenient approach to study the cultured pancreatic islet cells and enabled us to detect the proliferative effect of menin inhibition and combined TGF-β inhibition and PKC activation, which could be considered as potential strategies for inducing β cell proliferation and regeneration.
Insights
Optimized pancreatic islet cell culture facilitates the study of diabetes. A menin inhibitor and a combination of TGF-β inhibitor and PKC activator were found to induce beta cell proliferation.
Area of Science:
- Endocrinology and Metabolism
- Cell Biology
- Diabetes Research
Background:
- Pancreatic beta cells are crucial in type 1 and type 2 diabetes pathogenesis.
- Robust primary culture methods are essential for studying beta cell biology and screening therapeutics.
- Current culture methods require refinement for efficient analysis.
Purpose of the Study:
- To optimize monolayer culture conditions for rat pancreatic islet cells.
- To identify small molecules that induce beta cell proliferation using the refined culture method.
Main Methods:
- Compared various culture conditions to establish optimal monolayer culture for rat pancreatic islet cells.
- Utilized image analysis-based assays to evaluate culture quality.
- Screened candidate small molecules and their combinations for proliferative effects on beta cells.
Main Results:
- Ham's F10 medium with 2% FBS without surface coating yielded superior beta cell monolayer cultures.
- Other conditions resulted in fibroblast-like growth or multilayer aggregation.
- Menin inhibitor MI-2 and a combination of TGF-β inhibitor SB481542 with PKC activator Indolactam V significantly induced beta cell replication.
Conclusions:
- Optimized culture conditions offer a convenient method for studying pancreatic islet cells.
- Menin inhibition and combined TGF-β inhibition/PKC activation show potential for inducing beta cell proliferation and regeneration.
- These findings could inform new therapeutic strategies for diabetes.
