Induction of osteoconductivity by BMP-2 gene modification of mesenchymal stem cells combined with plasma-sprayed hydroxyapatite coating

Induction of osteoconductivity by BMP-2 gene modification of mesenchymal stem cells combined with plasma-sprayed hydroxyapatite coating
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间充质干细胞BMP-2基因修饰联合等离子喷涂羟基磷灰石涂层诱导骨传导

DOI:
10.1016/j.apsusc.2008.06.160
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发表时间:
2008-11
影响因子:
6.7
通讯作者:
郭应强
郭应强
中科院分区:
材料科学1区
文献类型:
--
作者:
郭应强

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骨植入物的成功在很大程度上取决于植入物的成分和表面特征。表面改性不仅有利于种植体的骨传导性,而且有利于骨锚定和生物力学稳定性。本文报道了一种联合收割机,将羟基磷灰石(HA)涂层基质与细胞载体结合,用于协同递送骨形态发生蛋白-2(BMP-2),增强植入物表面的骨传导性。我们研究了转染的BMP产生的骨髓间充质干细胞(BMSCs)在等离子喷涂HA涂层基质上的附着、生长和骨诱导活性。结果发现,HA涂层基质可以允许BMP-2基因修饰的BMSCs附着和生长,并且这种组合应用协同增强了基质表面的骨传导性。这种协同方法可能在矫形外科和牙科种植手术中具有骨整合价值。
Success in bone implant depends greatly on the composition and surface features of the implant. The surface-modification measures not only favor the implant's osteoconductivity, but also promote both bone anchoring and biomechanical stability. This paper reports an approach to combine a hydroxyapatite (HA) coated substrate with a cellular vehicle for the delivery of bone morphogenetic protein-2 (BMP-2) synergistically enhancing the osteoconductivity of implant surfaces. We examined the attachment, growth and osteoinductive activity of transfected BMP-producing bone marrow mesenchymal stem cells (BMSCs) on a plasma-sprayed HA coated substrate. It was found that the HA coated substrate could allow the attachment and growth of BMP-2 gene modified BMSCs, and this combined application synergistically enhanced osteconductivity of the substrate surface. This synergistic method may be of osseointegration value in orthopedic and dental implant surgery.
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