中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (4): 583-588.doi: 10.3969/j.issn.2095-4344.2214

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

聚(L-丙交酯-ε-己内酯)/交联聚乙烯吡咯烷酮输尿管支架植入大鼠膀胱后的组织相容性

唐萌萌1,陈和春2,谢宏晨1,张  瑜2,谭晓霜1,孙艺璇1,黄毅娜1   

  1. 1四川大学华西公共卫生学院/四川大学华西第四医院,四川省成都市 610041;2中国科学院成都有机化学有限公司,四川省成都市  610041
  • 收稿日期:2019-05-28 修回日期:2019-05-29 接受日期:2019-08-23 出版日期:2020-02-08 发布日期:2020-01-07
  • 作者简介:唐萌萌,女,1995,河南省许昌市人,汉族,四川大学华西公共卫生学院在读硕士,主要从事食品毒理学研究。
  • 基金资助:
    江苏省科技厅社会发展(面上项目)项目(BE2016661);四川省科技支撑计划项目(14ZC2001)

Histocompatibility of poly(L-lactide-co-ε-caprolactone)/cross-linked polyvinylpyrrolidone ureteral stent grafted into the rat bladder

Tang Mengmeng1, Chen Hechun2, Xie Hongchen1, Zhang Yu2, Tan Xiaoshuang1, Sun Yixuan1, Huang Yina1   

  1. 1West China School of Public Health, Sichuan University/West China Fourth Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China; 2Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences, Chengdu 610041, Sichuan Province, China
  • Received:2019-05-28 Revised:2019-05-29 Accepted:2019-08-23 Online:2020-02-08 Published:2020-01-07
  • About author:Tang Mengmeng, Master candidate, West China School of Public Health, Sichuan University/West China Fourth Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
  • Supported by:
    the Social Development Project of Science and Technology Department of Jiangsu Province (General Project), No. BE2016661; the Science and Technology Support Program of Sichuan Province, No. 14ZC2001

摘要:

文题释义:
聚(L-丙交酯-ε-己内酯)管:以辛酸亚锡作为催化剂催化L-丙交酯和ε-己内酯的本体开环共聚合制得的生物医用材料,具有良好的可降解性、力学性能及生物安全性,作为支架构建的基础材料已被广泛研究,但由于其疏水性在组织工程中的应用受到限制。
交联聚乙烯吡咯烷酮:为一种亲水性聚合物,具有优良的生理惰性和生物相容性,同时具备很强的吸水能力,制备成输尿管支架后能降低支架表面的湿态摩擦,更重要的是利用自身非常好的吸水膨胀性,可在输尿管支架内部造成很高的压力,提高支架管的降解速率,并促使可降解组分聚(L-丙交酯-ε-己内酯)共聚物崩解成小碎片。

背景:随着组织工程学、材料学、生物力学等学科的发展,研制新型可生物降解输尿管支架管成为目前研究的重点。前期研究制备了聚(L-丙交酯-ε-己内酯)/交联聚乙烯吡咯烷酮输尿管支架。

目的:探索聚(L-丙交酯-ε-己内酯)输尿管支架植入SD大鼠膀胱内的组织相容性。

方法:取雄性SD大鼠(四川省中医药科学院实验动物中心提供)60只,随机分为4组,每组15只:假手术组在膀胱外侧开一小口后直接缝合,未植入任何材料;其余3组在膀胱外侧开一小口后分别植入聚氨酯输尿管支架(对照组)、聚(L-丙交酯-ε-己内酯)/8%交联聚乙烯吡咯烷酮输尿管支架(实验1组)、聚(L-丙交酯-ε-己内酯)/5%交联聚乙烯吡咯烷酮输尿管支架(实验2组),随后缝合切口。术后4,8,16周,大体观察膀胱局部解剖情况,苏木精-伊红染色观察各组埋植材料的组织相容性。实验经四川大学华西公共卫生学院分析测试中心实验动物伦理学委员会批准。

结果与结论:①大体观察:术后4,8,16周时,对照组、实验1组均出现不同程度的慢性炎症刺激反应,实验2组仅术后4周时出现慢性炎症刺激反应,对照组、实验1组术后4,16周的材料结石生成率高于假手术组(P < 0.05),3组术后8周的材料结石生成率比较差异无显著性意义(P > 0.05);实验2组仅术后4周的材料结石生成率高于假手术组,其余时间点比较差异无显著性意义(P > 0.05);②病理观察:术后各时间点,对照组、实验1组、实验2组均出现不同程度外膜异物、炎症反应及黏膜弥漫增生,3组间术后不同时间点的黏膜弥漫增生率比较差异无显著性意义(P > 0.05),但均高于假手术组(P < 0.05);③结果表明:聚(L-丙交酯-ε-己内酯)/交联聚乙烯吡咯烷酮输尿管支架的结石生成情况和膀胱组织学反应与商品聚氨酯输尿管支架管相当,尤以加入5%交联聚乙烯吡咯烷酮配比的组织相容性较优。

ORCID: 0000-0003-3251-0657(唐萌萌)

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程

关键词: 生物材料, 组织相容性, L-丙交酯, ε-己内酯, 交联聚乙烯吡咯烷酮, 输尿管支架管, 膀胱, 病理

Abstract:

BACKGROUND: With the development of tissue engineering, materials science, and biomechanics, developing new biodegradable ureteral stent has become an issue of concern. The ureteral stent with poly(L-lactide-co-ε-caprolactone)/crosslinked polypyrrolidone was prepared.

OBJECTIVE: To explore the histocompatibility of the ureteral stent grafted into the bladder of Sprague-Dawley rats.

METHODS: Sixty male Sprague-Dawley rats (provided by Laboratory Animal Center of Sichuan Academy of Traditional Chinese Medicine) were randomly divided into four groups, each group containing 15 rats. The sham operation group was directly sutured after opening a small incision on the outside of the bladder, and no material was implanted. The other three groups were implanted with polyurethane ureteral stent (control group), poly(L-lactide-co-ε-caprolactone)/8% cross-linked polyvinylpyrrolidone ureter stent (experiment group 1), poly(L-lactide ε- caprolactone)/5% cross-linked polyvinylpyrrolidone ureteral stent (experiment group 2) after opening a small incision on the outer side of the bladder, followed by suturing the incision. At 4, 8, and 16 weeks after operation, the local anatomy of the bladder was observed. The histocompatibility of the materials in each group was observed by hematoxylin-eosin staining. The study was approved by the Ethical Committee of Laboratory Animal Analysis and Testing Center of West China School of Public Health, Sichuan University.

RESULTS AND CONCLUSION: (1) Gross observation: at 4, 8 and 16 weeks postoperatively, different degrees of chronic inflammation reaction occurred in the control group and experimental group 1. In the experiment group 2, chronic inflammatory reaction appeared at 4 weeks postoperatively. The stone formation rate in the control group and experimental group 1 was significantly higher than that in the sham operation group (P < 0.05) at 4 and 16 weeks postoperatively, which showed no significant difference at 8 weeks postoperatively among groups (P > 0.05). The calculus formation rate in the experimental group 2 was significantly higher than that in the sham operation group only at 4 weeks postoperatively, and had no significant difference at other time points (P > 0.05). (2) Pathological observation: different degrees of foreign body in the outer membrane, inflammatory reaction and diffuse hyperplasia of the mucosa were found in the control group, experimental groups 1 and 2 at different time points postoperatively. There was no significant difference in the rate of diffuse hyperplasia of the mucosa at different time points postoperatively among groups (P > 0.05), but higher than that in the sham operation group (P < 0.05). (3) These results indicate that the calculus formation rate and bladder histological reaction of poly(L-lactide-co-ε-caprolactone)/cross-linked polyvinylpyrrolidone ureter stent are comparable with those of commercial ureteral stents, especially the addition of 5% cross-linked polyvinylpyrrolidone has better histocompatibility.

Key words: biomaterials, histocompatibility, L-Lactide, ε-caprolactone, cross-linked polyvinylpyrrolidone, ureteral stent tube, bladder, pathology

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