Theranostics:SrWCP生物陶瓷支架可增强骨质疏松性缺损中的骨再生

2020-02-14 不详 网络

骨质疏松性骨缺损的重建是一个临床问题,继续激励着新材料的设计。通过水热处理成功地制备了由锶(Sr)掺杂的羟基磷灰石(HA)晶须或纯HA晶须组成的生物陶瓷,分别命名为SrWCP和WCP。两种生物陶瓷都具有相似的三维(3D)多孔结构和机械强度,但是SrWCP生物陶瓷能够在生理条件下释放Sr。在骨质疏松大鼠干phy端股骨缺损模型中,植入了两种生物陶瓷支架,并研究了另一组接受WCP加雷奈酸锶药物管理的患者

骨质疏松性骨缺损的重建是一个临床问题,继续激励着新材料的设计。

通过水热处理成功地制备了由锶(Sr)掺杂的羟基磷灰石(HA)晶须或纯HA晶须组成的生物陶瓷,分别命名为SrWCP和WCP。两种生物陶瓷都具有相似的三维(3D)多孔结构和机械强度,但是SrWCP生物陶瓷能够在生理条件下释放Sr。在骨质疏松大鼠干phy端股骨缺损模型中,植入了两种生物陶瓷支架,并研究了另一组接受WCP加雷奈酸锶药物管理的患者(Sr-Ran + WCP)进行比较。

结果显示,植入后第1周,在SrWCP和Sr-Ran + WCP组中,成骨耦合血管更为常见,具有明显的血管样结构。植入后12周,与Sr-Ran + WCP组相当,SrWCP组比WCP组显示出更多的新骨形成在缺损处以及植入物骨间隙区域。SrWCP和Sr-Ran + WCP组都对周围的小梁骨微结构产生了有益的作用,以抵抗骨质疏松症引起的进行性骨质流失。在Sr-Ran + WCP组中发现血液Sr离子浓度异常高,而SrWCP几乎没有不良反应。

综上所述,该研究结果表明,SrWCP生物陶瓷可以作为治疗骨质疏松性骨缺损的安全骨替代品,因为它可以促进局部骨再生和植入骨整合至雷奈酸锶可以达到的水平。

原始出处:

Zhao R, Chen S, et al., A bioceramic scaffold composed of strontium-doped three-dimensional hydroxyapatite whiskers for enhanced bone regeneration in osteoporotic defects. Theranostics. 2020 Jan 1;10(4):1572-1589. doi: 10.7150/thno.40103. eCollection 2020.

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    2020-11-22 海豹
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    2020-08-06 redcrab
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    2020-02-16 lsj630
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    2020-02-16 Eleven17