A microfluidic chip containing multiple 3D nanofibrous scaffolds for culturing human pluripotent stem cells

Area of Science:

• Biomedical Engineering
• Cell Biology
• Microfluidics

Background:

• Current lab-on-a-chip systems often use 2D cell cultures, failing to replicate the optimal 3D microenvironment.
• This limitation hinders accurate investigation of drug and growth factor effects on cells.

Purpose of the Study:

• To design and validate a novel microfluidic system that supports three-dimensional (3D) cell culture within nanofibrous scaffolds.
• To enable controlled exposure of cells in 3D scaffolds to gradients of soluble factors.

Main Methods:

• A two-layer microfluidic device was engineered, featuring channels for soluble factor gradients and a lower layer with 3D nanofibrous scaffolds.
• Mathematical modeling was employed to characterize fluid flow dynamics within the system.
• Induced pluripotent stem cells were seeded into the 3D scaffolds for experimental validation.

Main Results:

• The microfluidic system successfully supported the seeding of induced pluripotent stem cells within the 3D nanofibrous scaffolds.
• Cells within the scaffolds were effectively exposed to well-mixed gradients of soluble factors.
• Fluid flow characteristics were successfully modeled, ensuring predictable gradient generation.

Conclusions:

• The developed microfluidic system overcomes the limitations of 2D cell culture in lab-on-a-chip devices.
• This 3D cell culture platform holds potential for identifying new differentiation factors and investigating drug toxicity.
• Future applications include patient-specific tissue analysis for personalized drug treatment optimization.