Polystyrene microplastics aggravate acute pancreatitis in mice

Area of Science:

• Environmental Science
• Toxicology
• Gastroenterology

Background:

• Microplastics (<5mm) are prevalent environmental pollutants.
• Discovery of microplastics in human tissues raises health concerns.
• The impact of microplastics on acute pancreatitis is largely unknown.

Purpose of the Study:

• To investigate the effects of polystyrene microplastics on acute pancreatitis in a mouse model.
• To explore the underlying mechanisms by which microplastics may aggravate pancreatitis.

Main Methods:

• Male mice were exposed to polystyrene microplastics (100 and 1000 μg/L) for 28 days.
• Acute pancreatitis was induced by cerulein injection.
• Pancreatic tissue was analyzed using TMT-based proteomics, and intestinal barrier integrity was assessed.

Main Results:

• Microplastics dose-dependently worsened pancreatic injury and inflammation in acute pancreatitis.
• High-dose microplastics significantly disrupted the intestinal barrier.
• Proteomic analysis identified 101 differentially expressed proteins related to cytoskeleton organization and inflammatory responses.

Conclusions:

• Microplastics can exacerbate acute pancreatitis through mechanisms including intestinal barrier disruption and altered protein expression.
• These findings highlight the potential health risks associated with microplastic exposure.
• Further research is needed to fully elucidate the impact of microplastics on human health.