双载药磷酸钙纳米载体可同时实现抗菌抗炎及成骨性能

2018-05-04 MedSci MedSci原创

本研究中,研究人员开发了由磷酸钙生物陶瓷纳米载体组成的双重局部药物传递系统(DDS),目的在于牙周炎的抗菌、抗炎和骨再生方面。使用微波促进湿化学合成法制备钙缺乏型羟基磷灰石(CDHA,Ca/P = 1.61)和磷酸三钙(β-TCP)。通过X射线衍射(XRD)和傅里叶变换红外光谱(FT-IR)表征纳米载体的相纯度,透射电子显微镜(TEM)评估其纳米尺寸形态。选择CDHA作为抗生素(四环素)的载体,而

本研究中,研究人员开发了由磷酸钙生物陶瓷纳米载体组成的双重局部药物传递系统(DDS),目的在于牙周炎的抗菌、抗炎和骨再生方面。使用微波促进湿化学合成法制备钙缺乏型羟基磷灰石(CDHA,Ca/P = 1.61)和磷酸三钙(β-TCP)。

通过X射线衍射(XRD)和傅里叶变换红外光谱(FT-IR)表征纳米载体的相纯度,透射电子显微镜(TEM)评估其纳米尺寸形态。选择CDHA作为抗生素(四环素)的载体,而选择TCP作为抗炎药(布洛芬)载体。从CDHA/TCP(CTP)系统体外研究组合药物释放曲线,并与HA/TCP(BCP)双相系统比较。

结果显示,CTP系统的四环素和布洛芬释放率为71%和23%,而BCP系统的四环素和布洛芬释放率为63%和20%。与BCP系统相比,CTP系统的药物释放曲线受控较好。CTP系统的药物释放动力学建模表明释放遵循具有非典型Fickian扩散分布的Higuchi模型。

体外生物学研究表明CTP系统具有明显的抗菌和抗炎活性,具有良好的生物相容性。在12周结束时,与对照(无载体)相比,负载药物的CTP系统中,大鼠颅骨缺损的体内植入研究显示更大的骨愈合和新骨形成。

综上所述,本研究中的体外和体内结果表明,联合给药平台可以为需要多种药物治疗的骨感染提供全面管理

原始出处:

Madhumathi K, Rubaiya Y, et al., Antibacterial, anti-inflammatory, and bone-regenerative dual-drug-loaded calcium phosphate nanocarriers-in vitro and in vivo studies. Drug Deliv Transl Res. 2018 May 1. doi: 10.1007/s13346-018-0532-6.

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