中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (34): 6138-6143.doi: 10.3969/j.issn.2095-4344.2013.34.012

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

新型一体式软性人工角膜支架植入碱烧伤兔角膜的组织病理学观察

白 华1, 2,王丽强1,黄一飞1   

  1. 1解放军总医院眼科,北京市 100853;2北京军区总医院眼科,北京市 100700
  • 出版日期:2013-08-20 发布日期:2013-08-20
  • 通讯作者: 黄一飞,教授,博士生导师,解放军总医院眼科,北京市 100853 301yk@sina.com
  • 作者简介:白华,女,1977年生,河北省邯郸市人,汉族,解放军总医院在读博士,主治医师,主要从事眼表疾病,白内障,角膜病,组织工程研究。 paihoo@163.com huabai.dr@gmail.com
  • 基金资助:

    国家重点基础研究发展规划项目(973 计划) (2013CB967001);国家自然科学基金项目(81271052,81170830,30973245,31271059)。

Histopathological observation of new soft one-piece keratoprosthesis skirt implanted into alkali burned rabbit corneas

Bai Hua1, 2, Wang Li-qiang1, Huang Yi-fei1   

  1. 1Department of Ophthalmology, PLA General Hospital, Beijing 100853, China; 2Department of Ophthalmology, General Hospital of Beijing Military Region, Beijing 100700, China
  • Online:2013-08-20 Published:2013-08-20
  • Contact: Huang Yi-fei, Professor, Doctoral supervisor, Department of Ophthalmology, PLA General Hospital, Beijing 100853, China 301yk@sina.com
  • About author:Bai Hua, Studying for doctorate, Attending physician, Department of Ophthalmology, PLA General Hospital, Beijing 100853, China; Department of Ophthalmology, General Hospital of Beijing Military Region, Beijing 100700, China paihoo@163.com, huabai.dr@gmail.com
  • Supported by:

    the Major State Basic Research Development Program of China (973 Program), No. 2013CB967001*; the National Natural Science Foundation of China, No. 81271052*, 81170830*, 30973245*, 31271059*

摘要:

背景:前期实验制备的聚甲基丙烯酸羟乙酯人工角膜具有优良的光学性能和良好的亲水性,在植入家兔皮下和正常角膜组织实验中显示了良好的生物相容性,并具有抗撕裂强度。

目的:进一步评估新型一体式聚甲基丙烯酸羟乙酯人工角膜多孔支架材料在碱烧伤角膜中的生物愈合过程及组织病理学特点。

方法:氢氧化钠碱烧伤新西兰兔角膜3个月后,形成带新生血管和角膜白斑的动物模型。将孔隙性聚甲基丙烯酸羟乙酯人工角膜材料植入烧伤后的角膜板层间,分别于植入后2,8,16,28周进行苏木精-伊红染色、天狼猩红染色、免疫组织化学染色、扫描电镜及透射电镜观察。

结果与结论:组织病理学显示,材料植入后2周炎症反应轻微,所有标本中均无钙化现象,聚甲基丙烯酸羟乙酯材料孔隙中有成纤维细胞长入并有胶原沉积,随着时间推移,孔隙逐渐被填满;到16周时,与角膜组织能形成稳定的连接;28周时,材料孔隙几乎被新生组织完全充填,细胞数量减少,主要由成熟纤维构成。扫描电镜显示新生组织长入材料孔隙之中,与角膜结合紧密;透射电镜下见迁徙入材料内的角膜细胞胞浆富含粗面内质网等细胞器,显示旺盛的合成功能;其周围有胶原、蛋白多糖等细胞外基质的沉积,并且显示出从新生到成熟的动态变化。结果证实植入碱烧伤兔角膜层间的聚甲基丙烯酸羟乙酯孔隙性材料能够允许角膜细胞迁徙、增殖,分泌沉积细胞外基质,形成新的组织,达到材料与组织的稳定连接,显示了较好的生物相容性。

关键词: 生物材料, 复合支架材料, 聚甲基丙烯酸羟乙酯, 人工角膜, 碱烧伤, 角膜移植, 组织病理学, 国家自然科学基金

Abstract:

BACKGROUND: Polyhydroxyethyl methacrylate has excellent optical properties and good hydrophilicity which has been widely applied in biological materials, such as contact lenses, intraocular lenses. In previous experiments, artificial corneas made of polyhydroxyethyl methacrylate subcutaneously implanted or implanted into normal rabbit cornea have showed good biocompatibility and tear resistance.

OBJECTIVE: To evaluate the histopathological results of the porous skirt of new type one-piece keratoprosthesis made of polyhydroxyethyl methacrylate implanted to alkali burned rabbit corneas.

METHODS: New blood vessels and walleyes formed in New Zealand rabbits at 3 months after alkali burned rabbit corneas. The porous discs of polyhydroxyethyl methacrylate were inserted into the lamellar pocket of alkali-burned corneas and the corneas were observed clinically, histologically and ultrastructurally at 2, 8, 16 and 28 weeks after implantation,.completely filled with new tissue, the number of cells decreased, and mature fibers were mainly found at 28 weeks. Scanning electron microscope showed new tissue grew into the pores which were closely connected with the corneas. Transmission electron microscope exhibited cytoplasm migrating into the material was rich in rough endoplasmic reticula, showing strong synthetic function, collagen, proteoglycans, and other extracellular matrix deposition. These findings indicate that the porous skirt of polyhydroxyethyl methacrylate implanted into the alkali burned rabbit corneas allowed corneal cells migration, proliferation, secretion of the deposition of extracellular matrix and the formation of new tissue to complete the stable connection with cornea, showing a better biocompatibility.

RESULTS AND CONCLUSION:Histopathology suggested that mild inflammatory reaction and no calcification were seen in all specimens, fibroblasts and deposition of collagens were found in the pores of the dics at 2 weeks after implantation; stable connection with cornea was formed by the end of 16 weeks; the pores were almost  

Key words: biomaterials, compound scaffold materials, polyhydroxyethyl methacrylate, keratoprosthesis, alkali burn, corneal transplantation, histopathology, National Natural Science Foundation of China

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