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Updated: Jul 14, 2026
Human Neutrophil Flow Chamber Adhesion Assay
Published on: July 2, 2014
Mucin coatings suppress neutrophil adhesion to a polymeric model biomaterial
Tomas Sandberg1, Jan Carlsson, Marjam Karlsson Ott
1Division of Surface Biotechnology, Department of Physical and Analytical Chemistry, BMC, Uppsala University, SE-751 23 Uppsala, Sweden. tomas.sandberg@ytbioteknik.uu.se
Abstract:
Following our recent study on the fractionation, characterization, and model adsorption of mucins derived from bovine salivary glands (BSM), porcine stomach scrapings (PGM), and human whole saliva (MG1), we here present a microscopic evaluation of the interactions between mucin-coated substrates and human neutrophils. Our results show that surface-coating with BSM, PGM, and MG1 can be effectively used to suppress the adhesion of neutrophils to a polymeric model biomaterial (Thermanox). Neutrophil morphologies found on Thermanox substrates coated with mucins resemble those observed for nonactivated neutrophils found in circulation. Notably, low neutrophil adhesion can be obtained at a significantly lower coating concentration (0.125 mg/mL) for the compositionally complex MG1 mucin than for the relatively pure BSM and PGM mucins (1 mg/mL). Furthermore, since coating at a low BSM and PGM concentration (0.25 mg/mL) results in higher cell counts and more spread cells than in the high-concentration case, we suggest that dense mucin surface packing is critical for good coating performance. In conclusion, the present study demonstrates how mucins from three different sources, of different compositional and structural status, efficiently can be used to suppress neutrophil adhesion and activation. This finding makes them potent candidates for use as biomaterial coatings.
Insights
Mucins from bovine, porcine, and human sources effectively prevent neutrophil adhesion to biomaterials. Optimal surface packing of these mucins (bovine salivary glands, porcine stomach scrapings, human whole saliva) is key for suppressing inflammatory cell interactions.
Area of Science:
- Biomaterials Science
- Immunology
- Surface Chemistry
Background:
- Mucins are crucial glycoproteins involved in lubrication and host defense.
- Understanding mucin-host interactions is vital for developing advanced biomaterials.
- Previous work characterized mucins from bovine salivary glands (BSM), porcine stomach scrapings (PGM), and human whole saliva (MG1).
Purpose of the Study:
- To microscopically evaluate the interaction between mucin-coated substrates and human neutrophils.
- To assess the efficacy of different mucin coatings in preventing neutrophil adhesion.
- To determine optimal conditions for mucin surface packing for biomaterial applications.
Main Methods:
- Coating of Thermanox substrates with BSM, PGM, and MG1 mucins at various concentrations.
- Microscopic evaluation of human neutrophil adhesion and morphology on coated substrates.
- Comparative analysis of mucin coating performance based on source and concentration.
Main Results:
- Surface coating with BSM, PGM, and MG1 effectively suppressed neutrophil adhesion to Thermanox.
- Neutrophil morphology on mucin-coated surfaces mimicked non-activated circulating neutrophils.
- Lower concentrations of MG1 (0.125 mg/mL) were effective compared to BSM and PGM (1 mg/mL).
- Dense mucin surface packing, not high concentration, is critical for effective coating.
Conclusions:
- Mucins from diverse sources can efficiently suppress neutrophil adhesion and activation.
- These mucins are promising candidates for developing anti-fouling biomaterial coatings.
- Surface properties and dense packing of mucins are critical for biomaterial performance.
