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Development of tunable biodegradable polyhydroxyalkanoates microspheres for controlled delivery of tetracycline for treating periodontal disease

机译:开发可调节的可生物降解的聚羟基链烷酸酯微球以控制四环素的递送以治疗牙周疾病

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摘要

This article was aimed at preparation and characterization of drug delivery carriers made from biodegradable polyhydroxyalkanoates (PHAs) for slow release of tetracycline (TC) for periodontal treatment. Four PHA variants; polyhydroxybutyrate (PHB), poly(hydroxybutyrate-co-hydroxyvalerate) with 5, 12, and 50% hydroxyvalerate were used to formulate TC-loaded PHA microspheres by double emulsion-solvent evaporation method. We also compared the effect of different molecular weight (M-w) of polyvinyl alcohol (PVA) acting as surface stabilizer on particle size, drug loading, encapsulation efficiency, and drug release profile. The TC-loaded PHA microspheres exhibited microscale and nanoscale spherical morphology under scanning electron microscopy. Among formulations, TC-loaded PHB:low M-w PVA demonstrated the highest TC loading with slow release behavior. Our results showed that the release rate from PHA microspheres was influenced by both the type of PHA and M-w of PVA stabilizer. Lastly, TC-loaded PHB microspheres showed efficient killing activity against periodontitis-causing bacteria, suggesting its potential application for treating periodontal disease. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44128.
机译:本文旨在制备和表征由可生物降解的聚羟基链烷酸酯(PHA)制成的药物递送载体,以缓慢释放四环素(TC)进行牙周治疗。四种PHA变体;聚羟基丁酸酯(PHB),聚羟基丁酸酯-共-羟基戊酸酯与5、12和50%羟基戊酸酯通过双乳液-溶剂蒸发法配制负载TC的PHA微球。我们还比较了用作表面稳定剂的聚乙烯醇(PVA)的不同分子量(M-w)对粒径,载药量,包封效率和药物释放曲线的影响。载有TC的PHA微球在扫描电子显微镜下显示出微米级和纳米级球形形态。在制剂中,TC负载的PHB:低M-w PVA表现出最高的TC负载和缓慢释放行为。我们的结果表明,PHA微球的释放速率受PHA类型和PVA稳定剂M-w的影响。最后,载有TC的PHB微球对引起牙周炎的细菌表现出有效的杀灭活性,表明其在治疗牙周疾病中的潜在应用。 (c)2016 Wiley Periodicals,Inc. J. Appl。 Polym。科学2016,133,44128。

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