Regulation of Osteoblast Differentiation by Acid-Etched and/or Grit-Blasted Titanium Substrate Topography Is Enhanced by 1,25(OH)2D3 in a Sex-Dependent Manner

Authors

Rene Olivares-Navarrete, Virginia Commonwealth University
Sharon L. Hyzy, Virginia Commonwealth University
Barbara D. Boyan, Virginia Commonwealth University, Georgia Institute of TechnologyFollow
Zvi Schwartz, Virginia Commonwealth University, University of Texas Health Science Center at San Antonio

Document Type

Article

Original Publication Date

2015

Journal/Book/Conference Title

BioMed Research International

Volume

2015

DOI of Original Publication

10.1155/2015/365014

Comments

Originally published at http://dx.doi.org/10.1155/2015/365014

Date of Submission

December 2015

Abstract

This study assessed contributions of micron-scale topography on clinically relevant titanium (Ti) to differentiation of osteoprogenitor cells and osteoblasts; the interaction of this effect with 1𝛼,25-dihydroxyvitamin D₃ (1𝛼,25(OH)₂D₃); and if the effects are sex-dependent. Male and female rat bone marrow cells (BMCs) were cultured on acid-etched (A, 𝑅_𝑎 = 0.87 𝜇m), grit-blasted (GB, 𝑅_𝑎 = 3.90 𝜇m), or grit-blasted/acid-etched (SLA, 𝑅_𝑎 = 3.22 𝜇m) Ti. BMCs were sensitive to surface topography and underwent osteoblast differentiation. This was greatest on SLA; acid etching and grit blasting contributed additively. Primary osteoblasts were also sensitive to SLA, with less effect from individual structural components, demonstrated by enhanced local factor production. Sex-dependent responses of BMCs to topography varied with parameter whereas male and female osteoblasts responded similarly to surface treatment. 1𝛼,25(OH)₂D₃ enhanced cell responses on all surfaces similarly. Effects were sex-dependent and male cells grown on a complex microstructured surface were much more sensitive than female cells. These results indicate that effects of the complex SLA topography are greater than acid etching or grit blasting alone on multipotent BMCs and committed osteoblasts and that individual parameters are sex-specific. The effect of 1𝛼,25(OH)₂D₃ was sex dependent. The results also suggest that levels of 1𝛼,25(OH)₂D₃ in the patient may be important in osseointegration.

Rights

Copyright © 2015 Rene Olivares-Navarrete et al.This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Is Part Of

VCU Biomedical Engineering Publications