Int J Nanomed:仿生压电纳米复合膜协同增强脱蛋白牛骨移植物的成骨作用

2019-05-24 不详 网络

骨移植物与屏障膜的组合是引导骨再生(GBR)治疗的经典方法。然而,目前可用的屏障膜的骨诱导性不足以及随后有限的骨再生通常会抑制骨修复的功效。在这项研究中,我们利用生物材料的压电特性来增强屏障膜的骨诱导性。采用模拟天然骨压电性能的柔性纳米复合膜作为屏障膜。探讨了其与脱蛋白牛骨(DBB)异种移植物联合修复临界大小的兔下颌骨缺损的治疗效果。制备的纳米复合膜具有嵌入聚(偏二氟乙烯三氟乙烯)(P(VDF-T

骨移植物与屏障膜的组合是引导骨再生(GBR)治疗的经典方法。然而,目前可用的屏障膜的骨诱导性不足以及随后有限的骨再生通常会抑制骨修复的功效。在这项研究中,我们利用生物材料的压电特性来增强屏障膜的骨诱导性。

采用模拟天然骨压电性能的柔性纳米复合膜作为屏障膜。探讨了其与脱蛋白牛骨(DBB)异种移植物联合修复临界大小的兔下颌骨缺损的治疗效果。制备的纳米复合膜具有嵌入聚(偏二氟乙烯三氟乙烯)(P(VDF-TrFE))基质中的均匀分布的压电BaTiO 3纳米颗粒(BTO NP)。

结果显示,极化纳米复合膜的压电系数接近人骨的压电系数。极化纳米复合膜的压电系数非常稳定,在浸入培养基后,超过90%的原始压电系数(d33)保持长达28天。与市售的聚四氟乙烯(PTFE)膜相比,极化的BTO/P(VDF-TrFE)纳米复合膜表现出更高的骨诱导性(通过免疫荧光染色评估的runt相关转录因子2(RUNX-2)表达)并显著诱导早期新生血管形成,在用DBB Bio-Oss®颗粒植入后,在兔下颌骨临界尺寸缺损内完成成熟的骨结构形成。

总之,该研究结果表明压电BTO/P(VDF-TrFE)纳米复合膜可能适合于提高GBR的临床疗效。

原始出处:

Bai Y, Dai X, et al., Biomimetic piezoelectric nanocomposite membranes synergistically enhance osteogenesis of deproteinized bovine bone grafts. Int J Nanomedicine. 2019 Apr 30;14:3015-3026. doi: 10.2147/IJN.S197824. eCollection 2019.

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    2019-09-09 xuyong535
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    2019-10-25 howi
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    2019-05-26 zhaojie88
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