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Systematic Analysis of In Vitro Cell Rolling Using a Multi-well Plate Microfluidic System
Published on: October 16, 2013
Microfluidic biofunctionalisation protocols to form multi-valent interactions for cell rolling and phenotype
Gerardo Perozziello1, Giuseppina Simone, Natalia Malara
1Department of Experimental Medicine, Bio Nano Engineering and Technology for Medicine-BioNEM Laboratory, University "Magna Graecia" of Catanzaro, Catanzaro, Italy. gerardo.perozziello@unicz.it
Electrophoresis
|April 26, 2013
Summary
We developed a rapid microbead-based method to biofunctionalise microfluidic devices for cellomics. This technique efficiently immobilizes antibodies, enabling enhanced detection and manipulation of cell surface molecules like MHC class I.
Area of Science:
- Biomedical Engineering
- Cell Biology
- Microfluidics
Background:
- Existing biofunctionalization methods for microfluidic systems are often costly, time-consuming, or incompatible with assembled devices.
- There is a need for simple, rapid, and versatile techniques to create functional microenvironments for cellomic studies.
Purpose of the Study:
- To develop and validate a fast, simple microbead-based method for biofunctionalising assembled microfluidic systems.
- To enable efficient coupling of biomolecules to microfluidic surfaces for cell receptor interactions.
- To investigate the impact of this method on cell surface molecule expression and subsequent cellular functions.
Main Methods:
- Utilized microbeads with specific surface moieties for biomolecule linkage and cell receptor coupling.
- Adapted microfluidic systems with topology and surface biochemistry modifications.
- Employed streptavidin-biotin interaction to immobilize antibodies targeting MHC class I molecules within 5 hours.
- Used RMA tumor cell lines rolled across functionalized surfaces to assess MHC class I molecule stripping.
Main Results:
- Biofunctionalisation using microbeads reduced MHC class I median fluorescent intensity from 300 (unfunctionalized) to 250.
- Cells treated on microbead-functionalized surfaces showed a 3.5-fold increase in susceptibility to cytotoxicity.
- The method is applicable to assembled systems, requires minimal reagents (200 μL), and is time-efficient.
Conclusions:
- The proposed microbead-based biofunctionalisation is a rapid and effective strategy for creating microfluidic environments for cellomic investigations.
- This method facilitates the stripping of cell surface molecules, such as MHC class I, leading to increased cellular susceptibility.
- The technique offers advantages in terms of speed, reagent usage, and applicability to assembled microfluidic devices.
