中国组织工程研究

• 细胞外基质材料 extracellular matrix materials • 上一篇    下一篇

血管内皮生长因子修饰膀胱脱细胞胶原基质修复尿道缺损

李桂立1,赵启林2   

  1. 1山东医学高等专科学校附属医院,山东省临沂市 276004;2山东大学齐鲁医院泌尿科,山东省济南市 250012
  • 收稿日期:2018-03-28 出版日期:2018-08-08 发布日期:2018-08-08
  • 通讯作者: 赵启林,硕士,副主任医师,山东大学齐鲁医院泌尿科,山东省济南市 250012
  • 作者简介:李桂立,男,1976年生,山东省金乡县人,硕士,主要从事生化检验、免疫检验研究。
  • 基金资助:

    山东省卫生科研重点课题(2015ZR0156)

Vascular endothelial growth factor-modified bladder acellular collagen matrix for repair of urethral defects

Li Gui-li1, Zhao Qi-lin2   

  1. 1Affiliated Hospital of Shandong Medical College, Linfen 276004, Shandong Province, China; 2Department of Urology, Qilu Hospital of Shandong University, Jinan 250012, Shandong Province, China
  • Received:2018-03-28 Online:2018-08-08 Published:2018-08-08
  • Contact: Zhao Qi-lin, Master, Associate chief physician, Department of Urology, Qilu Hospital of Shandong University, Jinan 250012, Shandong Province, China
  • About author:Li Gui-li, Master, Affiliated Hospital of Shandong Medical College, Linfen 276004, Shandong Province, China
  • Supported by:

    the Hygienic Science and Technology Research Project of Shandong Province, No. 2015ZR0156

摘要:

文章快速阅读:

 

文题释义:
膀胱脱细胞胶原基质:采用化学方法去除膀胱壁全层的细胞成分,保留整个膀胱壁的细胞外基质,所得框架机械性能、结构与遗传角度更适于膀胱组织的再生。将其作为移植物支架材料植入组织缺损部位后,能为宿主细胞的增长、生殖提供空间,并在新生组织中不断降解,发挥一种辅助性作用,实现组织器官的内重建。
血管内皮生长因子:又称血管通透因子,是一种高度特异性的促血管内皮细胞生长因子,具有促进血管通透性增加、细胞外基质变性、血管内皮细胞迁移、增殖和血管形成等作用,有5种不同的亚型,根据氨基酸数目分别命名为血管内皮生长因子121、血管内皮生长因子145、血管内皮生长因子165、血管内皮生长因子189、血管内皮生长因子206,其中血管内皮生长因子165为主要存在形式。
 
 
背景:研究表明将血管内皮生长因子修饰的膀胱脱细胞胶原基质作为支架用于尿道缺损中,有助于缺损部位修复,促进尿道再生,但不同实验的结果存在争议。
目的:探讨血管内皮生长因子修饰的膀胱脱细胞胶原基质修复家兔尿道缺损的效果。
方法:将48只家兔随机分为4组,每组12只,正常组不进行任何处理;模型组、对照组、实验组建立尿道缺损模型,模型建立后即刻,对照组与实验组缺损部位分别植入膀胱脱细胞胶原基质、血管内皮生长因子修饰的膀胱脱细胞胶原基质,模型组不植入任何材料。建模后1个月,检测各组家兔尿流率、最大尿道压,对尿道缺损部位进行苏木精-伊红染色,观察尿道组织修复情况及微血管数量。

结果与结论:①建模后1个月,实验组尿流率、最大尿道压水平高于模型组、对照组(P < 0.05),与正常组比较差异无显著性意义;模型组尿流率、最大尿道压水平低于正常组、对照组(P < 0.05);②建模后1个月,正常组尿道组织清晰,上皮细胞排列规律;模型组尿道组织相对模糊,上皮细胞排列无序,大量炎性细胞浸润;实验组黏膜上皮修复良好,胶原基质部分降解,可见新生血管,未见炎性细胞浸润;对照组黏膜上皮修复一般,未见明显新生血管,少许炎性细胞浸润;③建模后1个月,实验组微血管数量高于其他3组(P < 0.05),对照组微血管数量高于模型组(P < 0.05);④结果表明,采用血管内皮生长因子修饰的膀胱脱细胞胶原基质修复家兔尿道缺损,可促进局部新生血管生成,改善尿道再生所需环境,促进尿道再生。

ORCID: 0000-0002-2796-4809(赵启林)

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: 膀胱脱细胞胶原基质, 血管内皮生长因子, 尿道缺损, 修复效果, 局部微环境, 动物模型, 血管再生, 生物材料

Abstract:

BACKGROUND: Modification by vascular endothelial growth factors (VEGF) contributes to the repair of urethral

defects using bladder acellular collagen matrix scaffolds. However, there is a dispute in different experimental results.
OBJECTIVE: To investigate the effect of VEGF-modified bladder acellular collagen matrix in the repair of rabbit urethral defects.
METHODS: Forty-eight rabbits were randomized into four groups (n=12 per group): no intervention was done in normal group; an animal model of urethral defect was made in the model, control and experimental groups, followed by implantation of nothing, bladder acellular collagen matrix and VEGF-modified bladder acellular collagen matrix, respectively. Rabbit urinary flow rate and maximal urethral pressure were measured. Hematoxylin-eosin staining was performed on the urethral defects to observe the urethral tissue repair and to detect the number of microvessels at 1 month after modeling.

RESULTS AND CONCLUSION: (1) At 1 month after modeling, the urinary flow rate and maximal urethral pressure in the experimental group had no statistical significance compared with the normal group (P > 0.05), but were significantly higher than those in the model and control groups (P < 0.05). The urinary flow rate and maximal urethral pressure in the model group were significantly lower than those in the normal and control groups (P < 0.05). (2) At 1 month after modeling, the urethral tissue in the normal group was clear with the epithelial cells being arranged regularly. The urethral tissues in the model group were relatively ambiguous shown by hematoxylin-eosin staining, the epithelial cells were arranged disorderly, and a large amount of inflammatory cells in the repair tissue were infiltrative. The epithelium in the experimental group was well repaired, incompletely degraded collagen matrix and new blood vessels were detected, and no inflammatory cell infiltration was observed. The mucosal epithelium in the control group was generally repaired, but no obvious neovascularization was visible, with a few inflammatory cell infiltrations. (1) At 1 month after modeling, the number of microvessels in the experimental group was significantly higher than that in the other three groups (P < 0.05), and the number of microvessels in the control group was also higher than that in the model group (P < 0.05). Overall, the use of VEGF-modified bladder acellular collagen matrix in the repair of rabbit urethral defects can promote local neovascularization and improve the environment for promoting urethral regeneration.

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

Key words: Vascular Endothelial Growth Factors, Urinary Bladder, Urethra, Tissue Engineering

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