Osteoblast lineage cells can discriminate microscale topographic features on titanium-aluminum-vanadium surfaces.
Osteoblast lineage cells can discriminate microscale topographic features on titanium-aluminum-vanadium surfaces.
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DOI：
10.1007/s10439-014-1108-3
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发表时间：
2014-12
影响因子：
3.8
通讯作者：
Boyan, Barbara D.
中科院分区：
文献类型：
--
作者：
Olivares-Navarrete, Rene;Hyzy, Sharon L.;Berg, Mark E.;Schneider, Jennifer M.;Hotchkiss, Kelly;Schwartz, Zvi;Boyan, Barbara D.
Titanium (Ti) and Ti alloys are used in orthopaedic/spine applications where biological implant fixation, or osseointegration, is required for long-term stability. These implants employ macro-scale features to provide mechanical stability until arthrodesis, features that are too large to influence healing at the cellular level. Micron-scale rough Ti alloy (Ti–6Al–4V) increases osteoblastic differentiation and osteogenic factor production in vitro and increases in vivo bone formation; however, effects of overall topography, including sub-micron scale and nanoscale features, on osteoblast lineage cells are less well appreciated. To address this, Ti6Al4V surfaces with macro/micro/nano-textures were generated using sand blasting and acid etching that had comparable average roughness values but differed in other roughness parameters (total roughness, profile roughness, maximum peak height, maximum valley depth, root-mean-squared roughness, kurtosis, skewness) (#5, #9, and #12). Human mesenchymal stem cells (HMSCs) and normal human osteoblasts (NHOst) were cultured for 7 days on the substrates and then analyzed for alkaline phosphatase activity and osteocalcin content, production of osteogenic local factors, and integrin subunit expression. All three surfaces supported osteoblastic differentiation of HMSCs and further maturation of NHOst cells, but the greatest response was seen on the #9 substrate, which had the lowest skewness and kurtosis. The #9 surface also induced highest expression of α2 and β1 integrin mRNA. HMSCs produced highest levels of ITGAV on #9, suggesting this integrin may play a role for early lineage cells. These results indicate that osteoblast lineage cells are sensitive to specific micro/nanostructures, even when overall macro roughness is comparable and suggest that skewness and kurtosis are important variables.
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DOI：
10.1073/pnas.0805420105
发表时间：
2008-10-14
影响因子：
11.1
作者：
Olivares-Navarrete, R.;Raz, P.;Schwartz, Z.
通讯作者：
Schwartz, Z.
影响因子：
9.7
作者：
Hyzy, S. L.;Olivares-Navarrete, R.;Schwartz, Z.
通讯作者：
Schwartz, Z.
影响因子：
9.7
作者：
Zeiger, Adam S.;Hinton, Benjamin;Van Vliet, Krystyn J.
通讯作者：
Van Vliet, Krystyn J.
影响因子：
5.3
作者：
Schwartz, Zvi;Raz, Perry;Boyan, Barbara D.
通讯作者：
Boyan, Barbara D.
影响因子：
14
作者：
Gittens, Rolando A.;McLachlan, Taylor;Olivares-Navarrete, Rene;Cai, Ye;Berner, Simon;Tannenbaum, Rina;Schwartz, Zvi;Sandhage, Kenneth H.;Boyan, Barbara D.
通讯作者：
Boyan, Barbara D.