Paper/polymer composited microfluidic platform for screening cell viability and protein expression under a chemical...

Area of Science:

• Biomedical Engineering
• Cancer Research
• Microfluidics

Background:

• Three-dimensional (3D) cell culturing offers superior clinical prediction for chemotherapy compared to 2D methods.
• Current 3D cell culture techniques are often time-consuming and labor-intensive, hindering high-throughput screening.
• Developing efficient platforms for 3D cell analysis is crucial for advancing cancer research and drug development.

Purpose of the Study:

• To develop an integrated paper/polymer microfluidic platform for streamlined 3D cell culture.
• To enable rapid screening of cell viability and protein expression under various chemical gradients.
• To provide a simplified tool for evaluating cellular responses to stimuli like nutrient, cytokine, and drug gradients.

Main Methods:

• A novel paper/polymer composite microfluidic device was fabricated.
• Cells were cultured within a paper substrate to mimic a 3D environment.
• Chemical gradients (nutrient, IL-6, anti-cancer drug) were generated within the microfluidic platform.
• Cell viability was assessed using direct reagent addition.
• On-paper immunoassay was performed for protein expression analysis.

Main Results:

• The platform successfully cultured cells in a 3D environment on a paper substrate.
• It enabled effective screening of cell viability and protein expression under defined chemical gradients.
• Signaling pathway activation in response to different gradients was identified.
• On-paper protein expression analysis was completed in as little as 1.5 hours.
• The integrated system simplified complex, multi-step laboratory procedures.

Conclusions:

• The developed microfluidic platform integrates 3D cell culture and analysis onto a single paper substrate, significantly reducing operational complexity.
• This approach offers a rapid and efficient first-tier screening tool for assessing cellular responses to diverse chemical gradients, including anti-cancer drugs.
• The technique holds promise for accelerating drug discovery and optimizing chemotherapy protocols in cancer research.