Double-Orthogonal Gradient-Based High-Throughput Screening Platform for Studying Cell Response Toward Combined...

Area of Science:

• Biomaterials Science
• Cell Biology
• Regenerative Medicine

Background:

• Implant-associated complications often stem from suboptimal interactions between cells and biomaterials.
• Cells dynamically respond to their physicochemical microenvironment, including wettability, stiffness, and topography.
• Simultaneously investigating these three surface parameters is crucial for realistic biomaterial design but remains challenging.

Purpose of the Study:

• To develop and present a novel high-throughput screening technology for evaluating cell responses to combined biomaterial surface parameters.
• To efficiently screen human bone-marrow-derived mesenchymal stem cells' interactions with multiple surface property combinations.
• To identify optimal surface parameter combinations for enhanced cell behavior and reduced implant complications.

Main Methods:

• Orthogonal combination of surface gradients for aligned topography, stiffness, and wettability to create four distinct combinatorial surfaces.
• Utilizing a high-throughput screening platform for simultaneous investigation of cell responses.
• Validation of screening outcomes by translating promising regions to homogeneous surfaces for further analysis.

Main Results:

• The screening platform enabled efficient assessment of human mesenchymal stem cells' response to a wide array of combined surface properties.
• Cell behavior, including adhesion, spreading, and vimentin expression, was consistent between the screening and validated homogeneous surfaces.
• The study successfully identified specific combinations of surface parameters influencing cell responses.

Conclusions:

• The developed high-throughput screening technology significantly aids in identifying optimal biomaterial surface parameter combinations.
• This approach has the potential to address and mitigate numerous current implant-associated complications.
• The findings pave the way for designing more biocompatible and effective medical implants.