A radial microfluidic concentration gradient generator with high-density channels for cell apoptosis assay

Area of Science:

• Biotechnology
• Microfluidics
• Cancer Research

Background:

• Cancer research requires precise control over drug concentrations for accurate cellular response analysis.
• High-throughput screening methods are crucial for accelerating drug discovery and understanding treatment efficacy.

Purpose of the Study:

• To develop an integrated microfluidic concentration gradient chip for high-throughput apoptosis analysis.
• To create a platform for generating stepwise and predictable drug concentrations.
• To investigate the effects of anticancer drugs on human uterine cervix cancer (HeLa) cells.

Main Methods:

• Development of a microfluidic chip with a radial channel network for generating concentration gradients.
• Utilizing repeated splitting-and-mixing of solutions in concentric and branch channels.
• Perfusion culture of HeLa cells and drug-induced apoptosis assay using 5-fluorouracil and Cyclophosphamide at multiple concentrations.

Main Results:

• Successful generation of predictable concentration gradients across hundreds of channels.
• Demonstration of high-throughput apoptosis analysis of HeLa cells on a single chip.
• Characterization of single and combined drug effects at various concentrations.

Conclusions:

• The developed microfluidic chip provides a compact, versatile, and high-density platform for generating wide concentration ranges.
• This integrated device enables efficient, high-throughput characterization of cellular responses to drugs.
• Offers a unique platform for drug screening and personalized medicine applications in cancer research.