Digital Microfluidics Revolutionize 3D Cell Culture

Scientists have developed a new microfluidic platform for growing cells in 3D, addressing a long-standing challenge in biological research. Most human cells live within complex, three-dimensional environments, yet are often studied on flat plastic surfaces. These two-dimensional cultures can alter cell behavior and limit their usefulness in predicting real-world biological responses.

The research, published in Microsystems & Nanoengineering in 2025 (DOI: 10.1038/s41378-025-01098-9), details a fully integrated system created by researchers at the University of Macau and their colleagues. Current microfluidic technologies offer improved control over cell culture conditions, but many rely on continuous fluid flow, external pumps, and complex manufacturing processes. Digital microfluidics allows precise droplet manipulation, but struggles too support true 3D cell growth due to a lack of on-chip microstructures.

To overcome these limitations, the team utilized a single-step micro-nano 3D printing process. This allowed them to directly fabricate three-dimensional microstructures onto microfluidic electrodes. The resulting chip enables:

• Controlled droplet movement
• Efficient cell capture
• Rapid formation of 3D cellular spheroids

Experiments demonstrated stable operation and high cell viability for up to 72 hours, proving the platform’s potential for advanced biological studies. This simpler, integrated approach combines precise control with physiologically relevant 3D cell culture.