Amino Acid Conjugated Self Assembled Molecules Modified Titanium Surfaces For Investigating Osteoblast Behavior

Year 2024, Volume: 52 Issue: 6, 329 - 337, 12.12.2024

Muge Turkaydin , Berkay Erenay , M. Özgen Öztürk Öncel , Pınar Kapçi , Deniz Hür , Lokman Uzun , Bora Garipcan

https://doi.org/10.15671/hjbc.1574564

Abstract

In this study, human fetal osteoblasts behavior was investigated on titanium surfaces that has been modified with amino acid conjugated self-assembled molecules. For this purpose, 3-aminopropyltriethoxysilane (APTES) was conjugated by histidine and leucine and these newly synthesized molecules were used in different combinations to modify titanium surfaces via creating amino acid conjugated self-assembled monolayers (SAM) on titanium surfaces. The modification of the surfaces to introduce hydrophilic and hydrophobic regions on the surface was achieved with varying concentrations (v/v,100:0 20:80, 50:50, 80:20, 0:100). X-ray photoelectron spectroscopy (XPS) analysis and water contact angle measurements were performed for characterizing all of the modified surfaces in order to verify presence of amino acid specific bonds and wettability behavior to find suitable concentrations to support initial cell adhesion. In order to confirm that the surface modification supported cell adhesion and proliferation, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was performed. Our results have shown that, amino acid SAM modification can be used to fine tune surface wettability and adherent cells were able to proliferate at different rates using different mixture concentrations. This presented approach can prove useful for expanding fine tuning surface chemistry methods for more specific applications and research.

Keywords

amino acid SAMs, osteoblast, titanium, surface modification

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