A Murine Pancreatic Islet Cell-based Screening for Diabetogenic Environmental Chemicals

Area of Science:

• Environmental Health
• Endocrinology
• Toxicology

Background:

• Environmental chemical exposure is linked to pancreatic beta cell damage and type 2 diabetes mellitus (T2DM).
• Chemical-induced beta cell damage mechanisms are complex, but often involve oxidative stress and reactive oxygen species (ROS) generation.
• Identifying diabetogenic environmental chemicals is crucial for public health.

Purpose of the Study:

• To develop and validate an in vitro method for screening environmental chemicals that induce pancreatic beta cell damage.
• To identify specific environmental chemicals that cause oxidative stress in pancreatic islet cells.

Main Methods:

• Mouse pancreatic islet cells were isolated and cultured in 96-well plates.
• Cells were exposed to various chemicals, and reactive oxygen species (ROS) generation was measured using the DCFH-DA fluorescent dye.
• High-throughput screening of potential diabetogenic xenobiotics was performed.

Main Results:

• Bisphenol A (BPA), Benzo[a]pyrene (BaP), and polychlorinated biphenyls (PCBs) were identified as chemicals that induce high levels of ROS in pancreatic islet cells.
• These findings suggest that BPA, BaP, and PCBs may be diabetogenic.
• The developed method effectively detects chemical-induced ROS generation in cultured islet cells.

Conclusions:

• The established in vitro method is effective for screening diabetogenic xenobiotics by detecting ROS production.
• Environmental chemicals such as BPA, BaP, and PCBs show potential for inducing pancreatic beta cell toxicity.
• This screening approach can aid in identifying environmental risk factors for type 2 diabetes mellitus.