Journal
BIOMATERIALS SCIENCE
Volume 6, Issue 2, Pages 418-430Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7bm01044c
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Funding
- Natural Science Foundation of China [81672134]
- Science and Technology Commission of Shanghai Municipality [15441905300]
- Fund of Shanghai Municipal Commission of Health and Family Planning [201540369]
- Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure [SKL201610SIC]
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Both the topographic surface and chemical composition modification can enhance rapid osteogenic differentiation and bone formation. Till now, the synergetic effects of topography and chemistry cues guiding biological responses have been rarely reported. Herein, the ordered micro-patterned topography and classically essential trace element of strontium (Sr) ion doping were selected to imitate topography and chemistry cues, respectively. The ordered micro-patterned topography on Sr ion-doped bioceramics was successfully duplicated using the nylon sieve as the template. Biological response results revealed that the micro-patterned topography design or Sr doping could promote cell attachment, ALP activity, and osteogenic differentiation of bone marrow-derived mesenchymal stem cells (BMSCs). Most importantly, the samples both with micro-patterned topography and Sr doping showed the highest promotion effects, and could synergistically activate the ERK1/2 and p38 MAPK signaling pathways. The results suggested that the grafts with both specific topography and chemistry cues have synergetic effects on osteogenic activity of BMSCs and provide an effective approach to design functional bone grafts and cell culture substrates.
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