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Response of umbilical cord mesenchymal stromal cells to varying titanium topographical signals
Author(s) -
Lauria Ines,
Höner Miriam,
Kant Sebastian,
Davtalab Roswitha,
Weik Thomas,
Sternberg Katrin,
Fischer Horst
Publication year - 2018
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.36229
Subject(s) - mesenchymal stem cell , materials science , osteopontin , biomedical engineering , stromal cell , implant , microbiology and biotechnology , vinculin , in vivo , biophysics , cell adhesion , biology , pathology , adhesion , immunology , medicine , surgery , composite material
Abstract A wide variety of titanium implant modifications have been developed to improve tissue– or cell–material interactions including bone bonding, implant failure, and contact osteogenesis. Osteogenesis can be stimulated by mechanobiological signals such as topography though translation of in vivo reactions to in vitro bioactivity and stem cell culture data, and vice versa , is challenging. We hypothesized that a systematic in vitro approach comparing clinically well‐accepted implant surface topographical modifications could shed light on potential cell biological mechanisms provoked by submicron‐, micron‐ or macrostructured surfaces. In this study, we investigated the response of umbilical cord derived mesenchymal stromal cells (UC‐MSCs) to anodized, particle blasted, and plasma sprayed highly porous Plasmapore surfaces, which is known to promote bony ingrowth in vivo . After 21 days, UC‐MSCs undergo a morphological shift from a 2D to 3D behavior on micro‐ or macrostructures visualized by actin–vinculin fluorescence and are able to fill the porous surfaces completely. Cell viability after 7 days was significantly decreased on the micro‐ and macrostructured surfaces particle blasted and Plasmapore , compared to polished controls. The analysis of osteogenic differentiation under noninduced conditions revealed a significantly elevated ALP activity on Plasmapore , indicating a beneficial effect of this macrostructured surface toward osteogenic differentiation supported by late elevated gene expression of osteopontin evaluated by qPCR. Mineralization as well as in vitro bioactivity was pronounced on anodized surfaces. Our findings point to synergistic implant modification strategies allowing early contact osteogenesis and bone ingrowth for future implant designs. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 180–191, 2018.