Engineering human peritoneum in vitro: A novel microfluidic platform for modeling peritoneal physiology and...

Area of Science:

• Biomedical Engineering
• Cell Biology
• Organ-on-a-chip technology

Background:

• The peritoneum, a vital serous membrane, is crucial for abdominal homeostasis and immunity.
• Disruptions to the peritoneum cause severe complications like adhesions (up to 93% of surgical patients), peritonitis, and metastasis.
• Existing research models inadequately represent human peritoneal complexity, using insufficient animal models or simplified 2D cultures.

Purpose of the Study:

• To develop a PDMS-free microfluidic platform that replicates the human peritoneum's structure and function.
• To create a physiologically relevant 3D environment for studying peritoneal biology and disease.
• To establish a tool for improved understanding and treatment of peritoneal diseases.

Main Methods:

• Engineered a PDMS-free microfluidic device.
• Combined immortalized mesothelial cells (MeT5A) with patient-derived peritoneal fibroblasts.
• Utilized a 3D culture system with systematic evaluation of stromal matrices, identifying fibrin gel as optimal.
• Enabled real-time analysis of peritoneal function and dysfunction.

Main Results:

• Identified fibrin gel as the optimal stromal matrix for supporting mesothelial monolayers and cell viability for 14 days.
• Successfully modeled peritoneal adhesion formation, demonstrating the platform's translational potential.
• The 3D microfluidic system effectively recreated human peritoneal architecture and function.

Conclusions:

• The novel microfluidic platform accurately models human peritoneal biology in a 3D environment.
• This tool enhances the study of peritoneal diseases, including adhesion formation.
• It holds potential for accelerating drug discovery and developing personalized treatments for peritoneal conditions.