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Surface chemistry of grafted expanded poly(tetrafluoroethylene) membranes modifies the in vitro proinflammatory response in macrophages
Author(s) -
ChandlerTemple Adrienne,
Kingshott Peter,
WentrupByrne Edeline,
Cassady A. Ian,
Grøndahl Lisbeth
Publication year - 2013
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.34408
Subject(s) - proinflammatory cytokine , membrane , adsorption , materials science , protein adsorption , x ray photoelectron spectroscopy , desorption , in vitro , tetrafluoroethylene , biophysics , phosphate , chemical engineering , biocompatibility , biochemistry , chemistry , organic chemistry , polymer , inflammation , immunology , biology , composite material , copolymer , metallurgy , engineering
A series of surface‐modified expanded poly(tetrafluoroethylene) membranes showed varied levels of in vitro macrophage proinflammatory response. Membranes containing a mixture of phosphate and hydroxyl groups (as determined by X‐ray photoelectron spectroscopy analysis) stimulate greater macrophage activation than samples containing a mixture of phosphate and carboxylic acid segments. The types of proteins that adsorbed irreversibly from serum onto the two samples with the highest and lowest cellular response were investigated using surface‐matrix‐assisted laser desorption ionisation time‐of‐flight mass spectrometry. Distinct differences in the number and type of proteins that adsorbed were observed between these samples. A correlation was found between the main protein components adsorbed onto the surfaces and the resulting in vitro proinflammatory response. This study strongly supports the hypothesis that the cellular response is not controlled directly by surface properties but is mediated by specific protein adsorption events. This in turn highlights the importance of better understanding and controlling the properties of intelligent surface‐modified biomaterials. © 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part A, 2013.