Abstract
Previous observations (e.g., decreased bacterial adhesion) have shed the light on the auspicious possibility to use phosphatidylethanolamine as biomimetic coating for metal implants. Additionally, it was experimentally shown that phosphatidylethanolamine induces bone formation, however, up to now no study was performed to understand this observation or to find an explanation. In an attempt to unveil how and why phosphatidylethanolamine can improve cell metabolism and osteogenic differentiation, primary cells (human umbilical cord perivascular cells) were cultured on native or phosphatidylethanolamine coated surfaces. Several parameters were followed on gene (real time polymerase chain reaction) and protein (e.g., dot-blot and ELISA tests) levels. It was determined that phosphatidylethanolamine potentiates cell metabolism, osteogenic differentiation, and mineralisation early processes. By preventing biofilm formation while promoting new bone formation, phosphatidylethanolamine could be easily implemented as implant bio-mimicking coating.
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Acknowledgments
The authors wish to sincerely thank Frank Feyerabend, Lena Frenzel, and Gabriele Salamon from the department of Structural Research on Macromolecules for their generous help in the laboratory. Eckart Hille (Schön-Klinik Eilbek, Hamburg) and Christoph Lindner (Agaplesion Diakonieklinikum, Hamburg) are acknowledged for the supply of the primary cells. Financial support from the Helmholtz Association is gratefully acknowledged.
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Gene expression patterns over time: relative normalised expressions. Genes were classified in the following categories (a) apoptosis/survival, (b) growth regulatory factors, (c) transcription factors and MAPK3, (d and e) adhesion and ECM components, (f) TNF superfamily, and (g) mineralisation. Supplementary material 1 (TIFF 276 kb)
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Luthringer, B.J.C., Katha, U.M.R. & Willumeit, R. Phosphatidylethanolamine biomimetic coating increases mesenchymal stem cell osteoblastogenesis. J Mater Sci: Mater Med 25, 2561–2571 (2014). https://doi.org/10.1007/s10856-014-5263-8
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DOI: https://doi.org/10.1007/s10856-014-5263-8