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中国医药导刊 ›› 2020, Vol. 22 ›› Issue (7): 469-473.

• 临床药学 • 上一篇    下一篇

加替沙星-聚(丙烷-癸二酸)局部缓释系统体内释药特性和预防骨感染的实验研究

鲁锋, 严雪征, 贾虎城, 马术友   

  1. 遵化市人民医院骨科, 河北 唐山 064200
  • 收稿日期:2020-09-28 修回日期:2020-06-18 出版日期:2020-07-28 发布日期:2020-09-28

In Vivo Release Characteristics of Gatifloxacin-Poly (Propane-Sebacic Acid) Local Sustained Release System and Experimental Study on Prevention of Bone Infection

  1.  Department of Orthopedics, People′s Hospital of Zunhua, Heibei Tangshan 064200, China
  • Received:2020-09-28 Revised:2020-06-18 Online:2020-07-28 Published:2020-09-28

摘要: 目的:研究加替沙星-聚(丙烷-癸二酸)局部缓释系统的体内释药特性。方法: 加替沙星-聚(丙烷-癸二酸)缓释制剂体内降解实验:应用21只新西兰大耳白兔进行体内降解实验,用高效液相色谱法(HPLC)对血液、骨及骨髓各组织内加替沙星浓度进行测定。扫描电镜对加替沙星-聚(丙烷-癸二酸)缓释制剂植入前后结构变化进行观察。结果: 在骨内,第18天时,有一个小的高峰出现在药棒释药中;在骨髓组织中,第9天时具有较高的药物浓度;有一个一过性高峰出现在血药浓度。其余时间内,各组织中均具有较为平稳的药物浓度水平,同时和骨与骨髓组织中的药物浓度相比,血中具有较低的加替沙星浓度(P<0.05)。此外,在第3个月末时,和血液中药物浓度相比,骨与骨髓组织中具有较高的加替沙星药物浓度(P<0.05),且比加替沙星对金黄色葡萄球菌的最小抑菌浓度高。通过扫描电镜观察,加替沙星-聚(丙烷-癸二酸)缓释制剂降解是表面溶蚀降解,表面降解残留物为小球状,而加替沙星-聚(丙烷-癸二酸)缓释制剂内部结构未发生变化,在药物持续释放过程中,药棒未发生崩解和碎片化。结论:加替沙星-聚(丙烷-癸二酸)局部缓释制剂具有平稳的体内释药,同时能够持续90 d,聚(丙烷-癸二酸)是一种理想的缓释材料。

关键词: 加替沙星-聚(丙烷-癸二酸)缓释制剂, 骨感染, 加替沙星, 生物相容性, 生物降解, 聚酸酐

Abstract: Objective: To study the in vivo release characteristics of gatifloxacin-poly (propane-sebacic acid) local sustained release system. Methods: In vivo degradation experiment of gatifloxacin-poly (propane-sebacic acid) sustained-release preparation: 21 New Zealand white rabbits were used in the in vivo degradation experiment. The concentration of gatifloxacin in blood, bone and bone marrow was measured by high performance liquid chromatogram (HPLC). The structural changes of gatifloxacin-poly (propane-sebacic acid) sustained release preparations after implantation were observed by scanning electron microscope. Results: In bone, there was a small peak of drug release on the 18th day after implantation. In bone marrow, there was a high drug concentration on the 9th day, and a transient peak in blood concentration. During the rest of the time, the drug concentration in all tissues was relatively stable, and the blood concentration of gatifloxacin was lower than that in bone and bone marrow tissues(P<0.05). In addition, at the end of the third month, compared with blood drug concentration, bone and bone marrow tissue had higher gatifloxacin drug concentration and higher than minimum bacteriostatic concentration of gatifloxacin against Staphylococcus aureus(P<0.05). By using scanning electron microscope can find that the degradation of gatifloxacin-poly (propylene-sebacate acid) sustained release preparation is surface erosion degradation, the surface degradation residue is small and spherical, and the internal structure of gatifloxacin-poly (propylene-sebacic acid) sustained release preparation has not changed in drug sustained release process, rod without disintegration and fragmentation. Conclusion: The release of gatifloxacin-poly (propane-sebacic acid) sustained release preparation in vivo is stable and sustainable for 90 days. Poly (propane-sebacic acid) is an ideal sustained release material.

Key words: Gatifloxacin-poly (propane-sebacic acid) sustained release preparation, Infection of bone, Gatifloxacin, Biocompatibility, Biodegradation, Polyanhydrides

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