中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (52): 7815-7820.doi: 10.3969/j.issn.2095-4344.2016.52.009

• 材料生物相容性 material biocompatibility • 上一篇    下一篇

复合左旋聚乳酸胆肠溶解支架的体外实验

姚金锋1,韩金丽2,郭  昱1,崔东来1
  

  1. 1河北医科大学第二医院消化内科,河北省石家庄市  050000;2保定第七医院内镜室,河北省保定市  072150
  • 收稿日期:2016-09-24 出版日期:2016-12-16 发布日期:2016-12-16
  • 通讯作者: 韩金丽,主治医师,保定第七医院内镜室,河北省保定市 072150
  • 作者简介:姚金锋,男,1965年生,河北省海兴县人,汉族,博士,主任医师,主要从事胰腺炎,肠粘膜屏障研究。
  • 基金资助:

    2012年度医学科学研究重点课题(201200817)

In vitro study on a degradable poly-L-lactic acid biliary-enteric composite stent

Yao Jin-feng1, Han Jin-li2, Guo Yu1, Cui Dong-lai1 
  

  1. 1Department of Gastroenterology, the Second Affiliated Hospital of Hebei Medical University, Shijiazhuang 050000, Hebei Province, China; 2Department of Endoscope, Boding Seven Hospital, Baoding 072150, Hebei Province, China
  • Received:2016-09-24 Online:2016-12-16 Published:2016-12-16
  • Contact: Han Jin-li, Attending physician, Department of Endoscope, Boding Seven Hospital, Baoding 072150, Hebei Province, China
  • About author:Yao Jin-feng, M.D., Chief physician, Department of Gastroenterology, the Second Affiliated Hospital of Hebei Medical University, Shijiazhuang 050000, Hebei Province, China
  • Supported by:

    the Key Medical Science Research Project in 2012, No. 201200817

摘要:

文章快速阅读:

 

文题释义:
左旋乳酸:
存在于酸乳和西红柿液中,无毒,具有很好的水溶性,乳酸和甘醇酸的作用相似,具有很强的透皮作用,在皮肤中呈正常的碳酸化合物代谢。外用低浓度可以改善皮肤的新陈代谢,使角质形成细胞分裂加快,使堆积的角质细胞脱落,还可以使角质形成细胞和真皮层的含水量增加,真皮层内黏多糖、胶原纤维、弹力纤维数量增加,使真皮层厚度增加,浅层毛细血管扩张从而改善皮肤质地。用于皮肤干燥症、老年皮肤瘙痒症等。
热源实验:系将一定剂量的供试品,静脉注入家兔体内,观察家兔体温升高的情况,以判定供试品中所含热源的限度是否符合规定。
溶血实验:是对人体内的红细胞进行红细胞破裂溶解检测。主要用于溶血性贫血的病因诊断。溶血是指红细胞破裂溶解现象,很多理化因素都可以引起溶血。检查过程:取试管3支,各加新鲜配制的2%兔血生理盐水混悬液2.0 mL,第一管加生理盐水2.0 mL作为对照管,第二管加供试品稀释液(甲液)   2.0 mL,第三管加供试品稀释液(乙液)2.0 mL,摇匀,置37 ℃静置观察1 h。

背景:目前已研制出复合左旋聚乳酸可降解性胆肠支架。
目的:研究复合左旋聚乳酸胆肠溶解支架的溶解性及生物相容性。
方法:①溶解性:将复合左旋聚乳酸胆肠溶解支架置于人工胃酸中,12周内检测溶解率;②热源性:将复合左旋聚乳酸胆肠溶解支架浸提液经耳缘静脉注入兔体内,检测体温变化;③溶血性:将复合左旋聚乳酸胆肠溶解支架浸提液、生理盐水及蒸馏水分别加入兔抗凝血中,检测溶血率;④细胞相容性:分别以含体积分数10%胎牛血清的DMEM高汤培养基、橡胶材料浸提液、复合左旋聚乳酸胆肠溶解支架浸提液培养结肠癌Caco-2细胞,12,24,36,48 h后,检测细胞增殖;2 d后,检测细胞乳酸脱氢酶释放量。
结果与结论:复合左旋聚乳酸胆肠支架的体内稳定性时间长,在20周左右可以溶解近80%以上;复合左旋聚乳酸胆肠支架不具有热源性及溶血性;复合左旋聚乳酸胆肠支架对Caco-2细胞的增殖及乳酸脱氢酶释放无影响,无明显细胞毒性;结果表明,复合左旋聚乳酸材料具有良好的溶解性及细胞相容性。

关键词: 生物材料, 材料相容性, 左旋聚乳酸, 聚乳酸乙醇酸, 溶解率, 热源实验, 溶血实验, CCK-8, Caco-2细胞, 乳酸脱氢酶

Abstract:

BACKGROUND: The degradable poly-L-lactic acid (PLLA) biliary-enteric composite stent has been developed.
OBJECTIVE: To analyze the solubility and biocompatibility of the degradable PLLA biliary-enteric composite stent.
METHODS: Solubility: the PLLA composite stent was implanted into artificial gastric acid to detect the dissolution rate within 12 weeks. Pyrogen test: the PLLA composite stent extracts were injected into the rabbits via ear vein to detect the changes of body temperature. Hemolysis test: the PLLA composite stent extracts, normal saline and distilled water were added into the rabbit anticoagulant, respectively, to detect the hemolysis ratio. Cytocompatibility test: Caco-2 cells were respectively cultured in the DMEM medium containing 10% fetal bovine serum, rubber material extracts and the PLLA composite stent extracts, and the cell proliferation was detected at 12, 24, 36 and 48 hours; the lactic dehydrogenase release was detected at 2 days.
RESULTS AND CONCLUSION: The PLLA composite stent showed a long stability in vivo, and approximately 80% was dissolved at about 20 weeks. No reactions of pyrogen and henolysis were observed in the pyrogen and hemolysis tests. The PLLA composite stent made no effects on the Caco-2 cell proliferation and lactic dehydrogenase release. In conclusion, the PLLA composite material holds a good solubility and cytocompatibility.

Key words: Biocompatible Materials, Lactate Dehydrogenases, Tissue Engineering

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