中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (30): 4829-4834.doi: 10.3969/j.issn.2095-4344.0984

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

聚乙醇酸-胰岛移植物埋植大鼠腿部肌肉治疗糖尿病

谢万均1,魏 争2,宋 纯2   

  1. 1大连市友谊医院,辽宁省大连市 116021;2哈尔滨医科大学附属第一临床医学院卫生部细胞移植重点实验室,黑龙江省哈尔滨市 150000
  • 收稿日期:2018-05-28 出版日期:2018-10-28 发布日期:2018-10-28
  • 通讯作者: 宋纯,硕士生导师,哈尔滨医科大学附属第一临床医学院卫生部细胞移植重点实验室,黑龙江省哈尔滨市 150000
  • 作者简介:谢万均,女,1980年生,黑龙江省佳木斯市人,汉族,副主任医师,主要从事糖尿病方面的研究。
  • 基金资助:

     国家自然科学基金资助项目(30570931)

Polyglycolic acid-islet compound transplantation into rat leg muscles as diabetes treatment

Xie Wan-jun1, Wei Zheng2, Song Chun2   

  1. 1Dalian Friendship Hospital, Dalian 116021, Liaoning Province, China; 2Key Laboratory of Cell Transplantation, Ministry of Health, Department of General Surgery, First Affiliated Hospital of Harbin Medical University, Harbin 150000, Heilongjiang Province, China
  • Received:2018-05-28 Online:2018-10-28 Published:2018-10-28
  • Contact: Song Chun, Master’s supervisor, Key Laboratory of Cell Transplantation, Ministry of Health, Department of General Surgery, First Affiliated Hospital of Harbin Medical University, Harbin 150000, Heilongjiang Province, China
  • About author:Xie Wan-jun, Associate chief physician, Dalian Friendship Hospital, Dalian 116021, Liaoning Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 30570931

摘要:

文章快速阅读:

 

文题释义:
聚乙醇酸:是典型的合成可降解聚合物,由乙交酯开环聚合制取,降解后生成羟基乙酸;由于羟基乙酸是三羧酸循环的中间代谢物,吸收和代谢机制明确,并且有可靠的生物安全性,因此聚乙醇酸及其共聚物作为组织工程支架材料具有良好的生物相容性,生物可降解性和降解可调性,而且可诱导某些基因的上调转录。
聚乙醇酸-胰岛移植物将胰岛种植在经多聚赖氨酸处理的聚乙醇酸支架上,聚乙醇酸支架可为胰岛提供一个能附着的框架和代谢场所,延长胰岛在体外的存活时间,同时聚乙醇酸支架还可为胰岛体外生存提供良好的三维培养环境。
 
 
背景:胰岛移植是一种比较有效的糖尿病治疗方法,运用生物医学工程技术将生物材料引入胰岛移植,可保持胰岛活力,提高移植效率。
目的:将培养的聚乙醇酸-胰岛移植物移植到糖尿病受体大鼠肌肉内,观察聚乙醇酸-胰岛移植物治疗糖尿病的效果。
方法:取Wistar大鼠18只,采用腹腔注射链脲菌素方法建立糖尿病模型,建模成功后即刻随机分3组干预,对照组腿部肌肉注射生理盐水,实验1组腿部肌肉注射异种胰岛细胞,实验2组腿部埋植聚乙醇酸-异种胰岛细胞移植物。移植后3,7,14,21,30 d,检测各组大鼠血糖及胰岛素水平;移植后14,30 d,取实验组移植物标本,进行扫描电镜观察。

结果与结论:①实验1组、实验2组移植后3,7 d的血糖值明显低于对照组(P < 0.05),实验2组移植后14,21,30 d的血糖值低于实验1组(P < 0.05);②实验1组、实验2组移植后3,7 d的胰岛素水平明显高于对照组(P < 0.05),实验2组移植后不同时间点的胰岛素水平明显高于实验1组(P < 0.05);③扫描电镜显示,移植后14 d,实验组可见较多形态良好的胰岛细胞仍黏附于聚乙醇酸纤维支架上,胰岛细胞间可见呈细纤维交织成网状的细胞外基质形成,在胰岛细胞周围可见少量红细胞;随着埋植时间的延长,聚乙醇酸纤维支架开始降解,纤维支架逐渐断裂,长的纤维降解为短的纤维,30 d后最终支架层层脱落成碎片;④结果表明,聚乙醇酸-胰岛细胞移植能有效降低糖尿病大鼠的血糖水平,并提高血清胰岛素水平。

ORCID: 0000-0001-5388-7299(谢万均)

关键词: 聚乙醇酸, 胰岛, 糖尿病, 扫描电镜, 生物材料, 国家自然科学基金

Abstract:

 BACKGROUND: Islet transplantation is an effective method for diabetes treatment. Using biomedical engineering technology to introduce biomaterials into islet transplantation can maintain the vitality of islet and improve the efficiency of transplantation.

OBJECTIVE: To transplant the cultured polyglycolic acid (PGA)-islet into the muscle of diabetic recipient rats and to observe the effect of PGA-islet in the treatment of diabetes mellitus.
METHODS: A diabetic model was established in 18 Wistar rats by the method of intraperitoneal injection of streptozotocin, and the model rats were randomly assigned into three groups. In the control group, normal saline was injected into the muscle of the rat leg. In the experimental group 1, allogeneic islet cells were intramuscularly injected into the rat leg. In the experimental group 2, PGA-allogeneic islet cell graft was intramuscularly injected into the rat leg. At 3, 7, 14, 21 and 30 days after transplantation, blood glucose and serum insulin levels were detected in each rat. At 14 and 30 days after transplantation, graft specimens were taken from the experimental groups and observed by scanning electron microscopy.

RESULTS AND CONCLUSION: (1) At 3 and 7 days after transplantation, the blood glucose levels in the two experimental groups were significantly lower than that in the control group (P < 0.05), while the serum insulin levels in the two experimental groups were significantly higher than that in the control group (P < 0.05). Compared with the experimental group 1, the blood glucose level in the experimental group 2 was significantly lower at 14, 21 and 30 days after transplantation, while the serum insulin level in the experimental group 2 was significantly higher at each time point after transplantation (P < 0.05). Under the scanning electron microscope, in the experimental groups, plenty of well-formed islet cells were adhered to the PGA fiber scaffold at 14 days after transplantation; a visible network of extracellular matrix with fine fibers formed in islet cells; and a small number of red blood cells were visible around the islet cells. With the extension of embedded time, PGA fiber scaffolds began to degrade and crack. Long fibers degraded into short fibers, and after 30 days, the scaffold layer was broken into pieces finally. All these findings indicate that the transplantation of PGA-islet can effectively reduce the blood glucose level and increase the serum insulin level in diabetic rats.

Key words: Polyglycolic Acid, Diabetes Mellitus, Islets of Langerhans, Tissue Engineering

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