Abstract
3D-printed Porous Titanium Alloy Implants (pTi), owing to their biologically inertness and relatively smooth surface morphology, adversely affect the biological functions of surrounding cells. To address the challenges, constructing a bioinspired interface that mimics the hierarchical structure of bone tissue can enhance the cellular functions of cells. In this context, Hollow Mesoporous Silica Nanoparticles (HMSNs), renowned for their unique physicochemical properties and superior biocompatibility, offer a promising direction for this research. In this research, the initially synthesized HMSNs were used to construct a “hollow-mesoporous-macroporous” hierarchical bioinspired coating on the pTi surface through the Layer-by-Layer technique. Simultaneously, diverse morphologies of coatings were established by adjusting the deposition strategy of PDDA/HMSNs on the pTi surface (pTi-HMSN-2, pTi-HMSN-4, pTi-HMSN-6). A range of techniques were employed to investigate the physicochemical properties and regulation of cellular biological functions of the diverse HMSN coating strategies. Notably, the pTi-HMSN-4 and pTi-HMSN-6 groups exhibited the uniform coatings, leading to a substantial enhancement in surface roughness and hydrophilicity. Meantime, the coating constructed strategy of pTi-HMSN-4 possessed commendable stability. Based on the aforementioned findings, both pTi-HMSN-4 and pTi-HMSN-6 facilitated the adhesion, spreading, and pseudopodia extension of BMSCs, which led to a notable upsurge in the expression levels of vinculin protein in BMSCs. Comprehensive analysis indicates that the coating, when PDDA/HMSNs are deposited four times, possesses favorable overall performance. The research will provide a solid theoretical basis for the translation of HMSN bioinspired coatings for orthopedic implants.
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (Grant No. 82372391, 82001971, 82102358, 82202698, 52105343, U21A2099 and U23A20523); Project of “Medical + X” interdisciplinary innovation team of Norman Bethune Health Science Center of Jilin University (Grant No. 2022JBGS06); Project of youth interdisciplinary innovation team of Jilin University (Grant No. 419070623054); China Postdoctoral Science Foundation (Grant No. 2021M701384); Bethune Plan of Jilin University (Grant No. 2022B27, 2022B03); Wu Jieping Medical Foundation (Grant No. 320.6750.18522); Scientific Development Program of Jilin Province (Grant No. 20220402067GH); Jilin Province Development and Reform Commission (Grant No. 2022C044-2).
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Zhang, J., Liu, H., Wang, J. et al. Bioinspired Hollow Mesoporous Silica Nanoparticles Coating on Titanium Alloy with Hierarchical Structure for Modulating Cellular Functions. J Bionic Eng (2024). https://doi.org/10.1007/s42235-024-00511-9
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DOI: https://doi.org/10.1007/s42235-024-00511-9