A Membrane Filter-Assisted Mammalian Cell-Based Biosensor Enabling 3D Culture and Pathogen Detection.

Area of Science:

• Biotechnology
• Biosensing
• Cell Culture Technology

Background:

• Traditional 2D cell culture limits incubation time and cell density.
• Developing advanced cell-based assays is crucial for efficient diagnostics and research.

Purpose of the Study:

• To create a membrane filter-assisted cell-based biosensing platform.
• To enhance cell culture longevity and enable practical diagnostic applications.

Main Methods:

• Utilized polyester membranes as 3D cell culture scaffolds, treated with ethanol for cell attachment.
• Fabricated a cylindrical cartridge for media maintenance and flow-through exchange.
• Developed a colorimetric immunoassay for detecting toll-like receptor 1 (TLR1) in response to bacterial stimuli.

Main Results:

• Achieved stable cell settlement and extended incubation up to 16 days in the 3D scaffold.
• Demonstrated a fast and convenient cartridge-based system for pathogen detection (P. aeruginosa, E. coli).
• Digitized membrane color images for quantitative signal analysis.

Conclusions:

• The 3D membrane scaffold biosensing platform provides a robust and extended cell culture environment.
• The cartridge-type system offers a practical and efficient method for pathogen detection.
• This technology holds potential as an alternative to animal testing for cosmetic toxicity and drug efficacy studies.