Fluorescent Multiplex Cell Rolling Assay: Simultaneous Capturing up to Seven Samples in Real-Time Using Spectral...

Area of Science:

• Biomedical Engineering
• Cell Biology
• Immunology

Background:

• Parallel plate flow chambers are standard for studying cell adhesion under physiological flow.
• Traditional methods are time-consuming, resource-intensive, and prone to interexperiment variability.
• High-throughput analysis is needed for complex cell-cell interaction studies.

Purpose of the Study:

• To develop a multiplexing assay for high-throughput analysis of cell-cell adhesion under flow.
• To overcome limitations of single-sample analysis in traditional flow assays.
• To enable simultaneous assessment of multiple parameters and conditions in cell rolling studies.

Main Methods:

• Developed a three-color fluorescence staining method for sample multiplexing.
• Integrated samples with unique spectral signatures for simultaneous flow runs.
• Utilized a line-scanning spectral confocal microscope for real-time image acquisition.
• Applied the fluorescent multiplex cell rolling (FMCR) assay to study E-selectin-ligand interactions.

Main Results:

• Enabled simultaneous analysis of up to seven different sample combinations.
• FMCR assay allowed competitive analysis of cell adhesion events under various glycan conditions.
• Quantified differences in rolling frequency, velocity, and tethering capability.
• Demonstrated the assay's utility in studying glycan-dependent E-selectin binding.

Conclusions:

• The FMCR assay offers a robust, high-throughput alternative to traditional flow chamber assays.
• This multiplexing approach significantly enhances efficiency and reduces variability in cell adhesion research.
• FMCR is valuable for investigating dynamic cell-cell interactions, particularly glycan-mediated adhesion.