E7 peptide-functionalized Ti6Al4V alloy for BMSC enrichment in bone tissue engineering.

E7 peptide-functionalized Ti6Al4V alloy for BMSC enrichment in bone tissue engineering.
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E7 肽功能化 Ti6Al4V 合金,用于骨组织工程中的 BMSC 富集。

DOI:
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发表时间:
2018-08
影响因子:
2.2
通讯作者:
Li Wei
Li Wei
中科院分区:
医学4区
文献类型:
--
作者:
Man Zhentao;Li Tao;Zhang Laibo;Yuan Lin;Wu Changshun;Li Ping;Sun Shui;Li Wei

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Ti6Al4V合金被广泛应用于髋关节假体,但由于其缺乏仿生表面性能,往往存在骨结合不良的问题。众所周知,骨髓间充质干细胞(BMSCs)在宿主骨和关节假体的骨整合中起着重要作用。改善关节假体的骨整合的一个有希望的方法是丰富假体周围部位的BMSCs数量。已有研究报道,BMSC特异性亲和肽E7,可特异性富含BMSCs。然而,到目前为止,很少有研究报道E7在骨组织工程中的应用。在本研究中,我们将E7肽连接到Ti6Al4V合金上,制备了一种支架材料,以提高该合金的生物相容性。E7多肽能有效提高骨髓间充质干细胞在Ti6Al4V合金上的黏附力。此外,BTS支架比RGD功能化和非功能化对照支架更有利于成骨。功能性BTS支架可以为设计功能性关节假体铺平道路,促进宿主骨与种植体之间的骨结合。
Ti6Al4V alloy is widely used for hip joint prostheses, however owing to its lack of biomimetic surface properties, it often suffers from poor osseointegration. It is well known that bone mesenchymal stem cells (BMSCs) play an important role in the osseointegration of the host bone and joint prostheses. One promising approach to improving the osseointegration of joint prostheses is to enrich the number of BMSCs at the periprosthetic site. Previous studies have reported that BMSC specific affinity peptide E7, can specifically enrich BMSCs. However, to date, few studies have reported the use of E7 in bone tissue engineering. In this study, we conjugated E7 peptide to Ti6Al4V alloy to fabricate a scaffold (BTS) to improve the biocompatibility of the alloy. E7 peptide efficiently improved the adhesion of BMSCs to Ti6Al4V alloy. In addition, the BTS scaffold was more conducive to osteogenesis than the RGD-functionalized and non-functionalized control scaffolds. The functional BTS scaffold could pave the way for designing functional joint prostheses, which promote osseointegration between the host bone and implant.
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