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Modeling Adipokine and Insulin-Mediated Crosstalk Between Adipocytes and Beta Cells Using Flow-Enabled Microfluidics
Mohamad Orabi1,2, Mehdi Sh Yeganeh1, Tae-Hwa Chun3
1Department of Mechanical Engineering, University of Michigan Dearborn, 4901 Evergreen Road, Dearborn, MI, 48128, USA.
Small (Weinheim an Der Bergstrasse, Germany)
|August 1, 2025
Summary
A new microfluidic system models how fat cells and pancreatic beta cells interact in obesity. This reveals a feed-forward loop where fat cell secretions boost insulin release, contributing to Type 2 Diabetes.
Area of Science:
- Endocrinology
- Metabolic Disease Research
- Biomedical Engineering
Background:
- Obesity-associated beta cell dysfunction is central to Type 2 Diabetes (T2D) pathogenesis.
- Existing culture systems fail to replicate the dynamic crosstalk between adipose and beta cells.
- Understanding this crosstalk is vital for T2D research.
Purpose of the Study:
- To develop and utilize a flow-enabled microfluidic system to model adipocyte-beta cell crosstalk.
- To investigate the impact of obesity-related conditions (elevated glucose and insulin) on this crosstalk.
- To elucidate the role of adipocyte secretions in modulating beta cell function.
Main Methods:
- Development of a recirculating flow microfluidic device with an embedded micro-Tesla (µTesla) pump.
- Co-culture of 3T3 L1 adipocytes and INS1 beta cells within the microfluidic system.
- Analysis of soluble factors in the media under conditions of elevated glucose and insulin.
Main Results:
- Flow-enabled incubation increased adipocyte secretions of IL-6, TNF-α, and adiponectin.
- Adipocyte-derived IL-6 significantly enhanced beta-cell insulin secretion.
- A feed-forward loop was established, linking adipocyte secretions to beta cell response.
Conclusions:
- Flow-enabled microfluidics effectively models adipocyte-beta cell crosstalk relevant to obesity.
- A novel feed-forward mechanism involving IL-6 contributes to obesity-related beta cell dysfunction.
- Findings offer new insights into hyperinsulinemia and inflammation in obesity-associated T2D.
