Biomechanical 3D tumor models on a micro-milled high-throughput force sensor array.

Area of Science:

• Oncology
• Biomedical Engineering
• Biophysics

Background:

• The tumor microenvironment significantly impacts drug resistance and therapeutic outcomes.
• Traditional 2D cell cultures do not accurately represent the complex in vivo tumor environment.
• Key factors like extracellular matrix mechanics and cell communication are crucial but poorly modeled in 2D.

Purpose of the Study:

• To develop and validate a novel 3D tumor model integrated with biomechanical sensors.
• To enable simultaneous measurement of cellular forces and extracellular matrix remodeling in a physiologically relevant context.
• To compare drug responses in the 3D model versus traditional 2D cultures for improved preclinical drug testing.

Main Methods:

• Fabrication of a scalable 3D tumor model using micro-milling techniques.
• Integration of a high-throughput biomechanical sensor array for force and stiffness measurements.
• Culturing of patient-derived pancreatic ductal adenocarcinoma organoids with cancer cells and fibroblasts.

Main Results:

• The 3D model successfully characterized evolving biophysical properties (force, stiffness) of tumor constructs.
• Evaluated responses of 3D tumors to gemcitabine and all-trans retinoic acid (ATRA).
• Demonstrated significant differences in drug response between 3D and 2D culture models.

Conclusions:

• The developed 3D tumor model provides a more physiologically relevant platform for studying drug resistance.
• This biomechanically integrated model enhances preclinical drug testing accuracy.
• The platform holds potential for advancing personalized medicine approaches in cancer treatment.