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Quantifying adsorbed protein on surfaces using confocal fluorescence microscopy
Denisio M Togashi1, Alan G Ryder, Gregor Heiss
1Nanoscale Biophotonics Laboratory and School of Chemistry, National Centre for Biomedical Engineering Science, National University of Ireland-Galway, Galway, Ireland. denisio.togashi@nuigalway.ie
Colloids and Surfaces. B, Biointerfaces
|May 9, 2009
Summary
Confocal fluorescence microscopy quantifies bovine serum albumin (BSA) adsorption on glass surfaces at various pH levels. This method aids understanding protein interactions critical for biomaterials and biosensors.
Area of Science:
- Biomaterials Science
- Surface Chemistry
- Biosensor Technology
Background:
- Protein adsorption on surfaces is crucial for biosensors, biomaterials, and biomedical devices.
- Accurate in situ measurement of protein layers informs biocompatibility and device performance.
- Novel, accessible tools are needed for studying protein-surface interactions.
Purpose of the Study:
- To develop a confocal fluorescence microscopy method for quantifying protein adsorption.
- To investigate bovine serum albumin (BSA) adsorption on glass at different pH values.
- To analyze adsorption parameters using the Langmuir model and DLVO theory.
Main Methods:
- Utilized confocal fluorescence microscopy to measure BSA adsorption.
- Applied the Langmuir model to determine adsorption parameters.
- Employed DLVO theory for detailed analysis of pH-dependent interactions.
Main Results:
- Quantified BSA adsorption on hydrophilic glass surfaces across a pH range (2.0-9.2).
- Determined adsorption parameters, validating them against literature data.
- Analyzed the influence of pH on protein-surface interactions via DLVO theory.
Conclusions:
- Developed a practical confocal microscopy approach for protein adsorption quantification.
- Demonstrated pH significantly impacts BSA adsorption behavior on glass surfaces.
- Provided insights into protein-surface interactions relevant to biomaterial design and biosensor development.
