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- W2159422868 endingPage "20150164" @default.
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- W2159422868 abstract "The fibronectin fragment, 9th-10th-type III domains (FIII9-10), mediates cell attachment and spreading and is commonly investigated as a bioadhesive interface for implant materials such as titania (TiO2). How the extent of the cell attachment-spreading response is related to the nature of the adsorbed protein layer is largely unknown. Here, the layer thickness and surface fraction of two FIII9-10 mutants (both protonated and deuterated) adsorbed to TiO2 were determined over concentrations used in cell adhesion assays. Unexpectedly, the isotopic forms had different adsorption behaviours. At solution concentrations of 10 mg l(-1), the surface fraction of the less conformationally stable mutant (FIII9'10) was 42% for the deuterated form and 19% for the protonated form (fitted to the same monolayer thickness). Similarly, the surface fraction of the more stable mutant (FIII9'10-H2P) was 34% and 18% for the deuterated and protonated forms, respectively. All proteins showed a transition from monolayer to bilayer between 30 and 100 mg l(-1), with the protein longitudinal orientation moving away from the plane of the TiO2 surface at high concentrations. Baby hamster kidney cells adherent to TiO2 surfaces coated with the proteins (100 mg l(-1)) showed a strong spreading response, irrespective of protein conformational stability. After surface washing, FIII9'10 and FIII9'10-H2P bilayer surface fractions were 30/25% and 42/39% for the lower/upper layers, respectively, implying that the cell spreading response requires only a partial protein surface fraction. Thus, we can use neutron reflectivity to inform the coating process for generating bioadhesive TiO2 surfaces." @default.
- W2159422868 created "2016-06-24" @default.
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- W2159422868 date "2015-06-01" @default.
- W2159422868 modified "2023-10-16" @default.
- W2159422868 title "Interrogating protonated/deuterated fibronectin fragment layers adsorbed to titania by neutron reflectivity and their concomitant control over cell adhesion" @default.
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- W2159422868 doi "https://doi.org/10.1098/rsif.2015.0164" @default.
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