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Synergistic Approach of High-Precision 3D Printing and Low Cell Adhesion for Enhanced Self-Assembled Spheroid
Chunxiang Lu1, Aoxiang Jin1, Chuang Gao1
1School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China.
Biosensors
|January 24, 2025
Summary
This study introduces a 3D-printed microwell chip for efficient spheroid production. This novel platform offers high-throughput, size-controlled spheroid formation for biosensing applications like drug screening and disease modeling.
Area of Science:
- Biotechnology
- Cell Biology
- Materials Science
Background:
- Current spheroid manufacturing methods (hanging drops, microwells, microfluidics, magnetic manipulation, bioreactors) present challenges like complex workflows, specialized personnel needs, and poor batch reproducibility.
- Three-dimensional (3D) cell aggregates, or spheroids, are crucial for in vitro modeling but require robust production techniques.
Purpose of the Study:
- To design and validate a support-free, 3D-printed microwell chip for efficient and reproducible spheroid production.
- To develop a compatible low-cell-adhesion process for rapid optimization of microwell size and coating.
- To demonstrate the platform's utility in forming various spheroid types and conducting drug response experiments.
Main Methods:
- Design and fabrication of a 3D-printed microwell chip using a support-free approach.
- Development of a low-cell-adhesion process for spheroid culture.
- Simulation and experimental validation of microwell size and coating parameters.
- Formation of spheroids from human immortalized epidermal cells (HaCaTs), umbilical cord mesenchymal stem cells (UC-MSCs), and human osteosarcoma cells (MG63s).
- Biocompatibility assessment using fluorescent viability staining.
- In vitro drug response experiments.
Main Results:
- Successful formation of size-controlled spheroids with excellent shape retention using the 3D-printed microwell chip.
- Demonstrated biocompatibility and reliability of the chip through fluorescent viability staining.
- Enhanced gas exchange during culture led to improved differentiation marker expression.
- Successful execution of drug response experiments on the chip.
- High-throughput production capabilities compared to traditional methods.
Conclusions:
- The 3D-printed microwell chip offers an efficient, cost-effective solution for high-throughput spheroid production.
- The platform supports diverse cell types and enables reliable drug screening, disease modeling, and personalized therapy monitoring.
- This biosensor technology holds significant potential for real-time in vitro monitoring in life sciences and medical applications.
