TANDEM: biomicrofluidic systems with transverse and normal diffusional environments for multidirectional signaling.

Area of Science:

• Biomicrofluidics
• Cell Culture Engineering
• Bioengineering

Background:

• Traditional 2D cultures and single-plane microfluidic systems limit nutrient access and 3D cell communication.
• Existing microfluidic designs isolate lateral or vertical diffusion, hindering biomimicry of in vivo environments.

Purpose of the Study:

• To introduce a novel biomicrofluidic device architecture, TANDEM (Transverse And Normal Diffusional Environments for Multidirectional Signaling).
• To enable simultaneous transverse and normal diffusion for enhanced multidirectional communication in microfluidic systems.

Main Methods:

• Developed a novel multiplanar channel arrangement for the TANDEM device.
• Utilized COMSOL for computational modeling of transport phenomena.
• Tested diffusion rates and cell viability in hydrogel-embedded cultures within the TANDEM system.

Main Results:

• TANDEM systems demonstrated significantly enhanced diffusion compared to single-plane designs.
• Improved long-term viability of hydrogel-embedded cells due to better nutrient access.
• Validated the computational model's predictions for diffusion and viability.

Conclusions:

• TANDEM architecture facilitates multidirectional communication and enhances nutrient transport.
• This novel design improves cell viability in long-term cultures, overcoming limitations of current microfluidic systems.
• TANDEM systems offer a versatile platform for creating more complex and biomimetic microfluidic environments.