中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (38): 5691-5696.doi: 10.3969/j.issn.2095-4344.2016.38.010

• 药物控释材料 drug delivery materials • 上一篇    下一篇

局部定向抗结核药物缓释材料在兔桡骨内的释放及分布规律

苗瑞瑞1,张文龙1,鲍玉成1,李  梅2
  

  1. 1天津市海河医院,天津市  300350;2天津医科大学第二医院 天津市  300211
  • 收稿日期:2016-06-20 出版日期:2016-09-16 发布日期:2016-09-16
  • 通讯作者: 李梅,副主任医师,天津医科大学第二医院骨科,天津市 300211
  • 作者简介:苗瑞瑞,男,1982年生,天津中医药大学在读硕士,主治医师,主要从事骨与关节结核诊断与治疗研究。
  • 基金资助:
    天津市卫生局课题(2010KY10)

Release and distribution of anti-tuberculosis drug delivery materials locally oriented in the rabbit radius

Miao Rui-rui1, Zhang Wen-long1, Bao Yu-cheng1, Li Mei2 
  

  1. 1Tianjin Haihe Hospital, Tianjin 300350, China; 2Second Hospital of Tianjin Medical University, Tianjin 300211, China
  • Received:2016-06-20 Online:2016-09-16 Published:2016-09-16
  • Contact: Li Mei, Associate chief physician, Second Hospital of Tianjin Medical University, Tianjin 300211, China
  • About author:Miao Rui-rui, Studying for master’s degree, Attending physician, Tianjin Haihe Hospital, Tianjin 300350, China
  • Supported by:
    the Projected Funded by Tianjin Health Department, China, No. 2010KY10

摘要:

文章快速阅读:

 

 

文题释义:
抗结核药缓释材料
:主要是利用不改变材料原有的性能,将抗结核药物植入机体内,达到病灶部位后释放,从而能够保证材料具备抗结核作用,起到抗菌的作用。与全身用药相比,该治疗方法局部缓释载药治疗更加直接,能够在较短时间内使得局部达到预期的药物浓度,减少抗结核药物全身使用时的不良反应,提高抗结核效果。
理想的局部缓释材料:材料具备良好的生物相容性,置入机体后不会引起排斥反应;置入材料具备完全降解特性,不需要二次取出,增加患者痛苦;材料具备一定的机械强度、韧性,能够在骨缺损部位发挥支撑作用,并且与细胞具备黏附作用,利用细胞的生长。

背景:聚乳酸-羟基乙酸聚合物作为缓释材料,载药量相对较大且释药时间较长,可随着机体细胞的生长而降解,但其亲水性较差,容易引起无菌性炎症反应,不利用机体恢复。
目的:分析新型局部定向抗结核药物缓释材料在兔桡骨内的释放及其分布规律。
方法:取新西兰大白兔20只,建立桡骨远端骨缺损模型后随机分组,实验组于骨缺损处置入载异烟肼-利福平聚乳酸-羟基乙酸聚合物/β-磷酸三钙材料,对照组于骨缺损处置入载异烟肼-利福平聚乳酸-羟基乙酸聚合物材料。置入后4,8,12周进行缺损部位X射线检查;置入后12周,进行缺损部位组织学观察,同时检测外周血与局部血药浓度。
结果与结论:①X射线检查:实验组置入后不同时间点的Lane-Sandhu X射线评分显著高于对照组(P < 0.05);②组织学观察:实验组缺损部位完全愈合,新生骨小梁之间残留少量缓释材料,材料表面存在明显骨细胞;对照组缺损部位存在新生骨组织且与周围骨组织相互连接,新生骨组织中残留少许缓释材料;③血药浓度:实验组置入后不同时间点的外周血与局部血药浓度均高于对照组(P < 0.05);④结果表明:载异烟肼-利福平聚乳酸-羟基乙酸聚合物/β-磷酸三钙局部定向抗结核药物在兔桡骨内释放效果理想,可长时间稳定释放并在局部保持较高杀菌浓度。

关键词: 生物材料, 缓释材料, 局部定向, 抗结核药物, 分布规律, 骨缺损, 聚乳酸-羟基乙酸聚合物, 利福平, 异烟肼

Abstract:

BACKGROUND: Polylactic acid-glycolic acid polymer is a sustained-release material with relatively large drug loading and long-term release abilities that can degrade with cell growth in the body. However, its poor hydrophily easily leads to aseptic inflammation that is detrimental to the body’s recovery.
OBJECTIVE: To study the release and distribution of anti-tuberculosis drug delivery materials locally oriented within the rabbit radius.
METHODS: After modeling, 20 New Zealand white rabbits with distal radius bone defect were randomly divided into a control group and an experimental group, which were respectively given implantation of isoniazid-rifampicin polylactic acid-glycolic acid polymer/β-tricalcium phosphate material and isoniazid-rifampicin polylactic acid-glycolic acid polymer into the defect. Then, X-ray examination of the defect region was conducted at weeks 4, 8, 12 post implantation. Histological observation and detection of peripheral blood or local blood concentration were performed at week 12.
RESULTS AND CONCLUSION: After implantation, Lane-Sandhu X-ray scores were significantly higher in the experimental group than the control group (P < 0.05). The defect in the experimental group was healed completely with less release residual among newborn bone trabeculae and osteocytes were markedly visible on the material surface, while in the control group, new bone tissues were interconnected with the surrounding bone tissues at the defect site, and less release residual was found. Both peripheral blood and local blood concentrations in the experimental group were significantly higher than those in the control group after implantation (P < 0.05). To conclude, the anti-tuberculosis drug delivery material, isoniazid-rifampicin polylactic acid-glycolic acid polymer/β-tricalcium phosphate, has ideal release effect that can stably deliver anti-tuberculosis drugs for a long term at a high bactericidal concentration.  

Key words: Tuberculosis, Rifampin, Delayed-Action Preparations, Tissue Engineering

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