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Published in: Clinical Oral Investigations 4/2021

01-04-2021 | Original Article

Evaluating protein binding specificity of titanium surfaces through mass spectrometry–based proteomics

Authors: David Zuanazzi, Yizhi Xiao, Walter L. Siqueira

Published in: Clinical Oral Investigations | Issue 4/2021

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Abstract

Objectives

To evaluate whether surface characteristics of different titanium modifications may influence the composition of the salivary pellicle on each surface by analyzing the salivary proteome through mass spectrometry–based proteomics.

Materials and methods

Titanium discs with three surfaces modifications (PT (machined titanium), SLA (sandblasted/large-grit/acid-etched), and SLActive (modified SLA)) were characterized (topography, chemistry, and energy) prior to being exposed to saliva for 2 h to form a protein pellicle. The resultant protein layer was retrieved and analyzed through mass spectrometry (nLC-ESI-MS/MS) to examine the surface specificity for protein binding, while the proteome profile of each surface was classified.

Results

The proteome analysis showed that the salivary pellicle composition was more complex on rough surfaces (SLA and SLActive). Although variability in protein composition was observed between surfaces, most proteins were detected on more than one surface, indicating a limited surface specificity for protein binding. Additionally, the salivary pellicle formed on the SLActive presented a larger number of proteins associated with immune response, biological adhesion, and biomineralization.

Conclusions

Although topography, chemistry, and energy differed between the surfaces, they were not determinant to produce a salivary pellicle with high surface specificity. Also, we showed that several salivary proteins adsorbed on Ti surfaces are involved in biological functions important to the biointegration.

Clinical relevance

This study sheds light on the necessity for the development of bioactive surfaces that favors the formation of a specific protein layer that can enhance tissue response to assist the biointegration of dental implants.
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Metadata
Title
Evaluating protein binding specificity of titanium surfaces through mass spectrometry–based proteomics
Authors
David Zuanazzi
Yizhi Xiao
Walter L. Siqueira
Publication date
01-04-2021
Publisher
Springer Berlin Heidelberg
Published in
Clinical Oral Investigations / Issue 4/2021
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI
https://doi.org/10.1007/s00784-020-03548-2

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