中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (21): 3345-3350.doi: 10.12307/2022.642

• 组织工程神经材料 tissue-engineered nerve materials • 上一篇    下一篇

京尼平交联音猬因子复合纤维蛋白支架修复大鼠脊髓损伤

陈平波1,王  晶1,孙  勇2,徐晓峰3,陈  谦3,张志坚3   

  1. 1皖南医学院弋矶山医院骨科,安徽省芜湖市  241000;2镇江市第一人民医院疼痛科,江苏省镇江市  212001;3江苏大学医学院,江苏省镇江市 212001
  • 收稿日期:2021-07-27 接受日期:2021-10-30 出版日期:2022-07-28 发布日期:2022-01-27
  • 通讯作者: 徐晓峰,主任医师,江苏大学医学院,江苏省镇江市 212001
  • 作者简介:陈平波,男,汉族,医师,主要从事组织工程研究。
  • 基金资助:
    国家自然科学基金地区科学基金项目(81571830),项目负责人:张志坚;国家自然科学基金地区科学基金项目(81501077),项目负责人:陈谦;皖南医学院中青年自然基金(WK2019F16),项目负责人:陈平波

Genipin crosslinked sonic hedgehog composite fibrin scaffolds for the repair of spinal cord injury in rats

Chen Pingbo1, Wang Jing1, Sun Yong2, Xu Xiaofeng3, Chen Qian3, Zhang Zhijian3   

  1. 1Department of Orthopedics, Yijishan Hospital of Wannan Medical College, Wuhu 241000, Anhui Province, China; 2Department of Pain, Zhenjiang First People’s Hospital, Zhenjiang 212001, Jiangsu Province, China;  3Medical College of Jiangsu University, Zhenjiang 212001, Jiangsu Province, China
  • Received:2021-07-27 Accepted:2021-10-30 Online:2022-07-28 Published:2022-01-27
  • Contact: Xu Xiaofeng, Chief physician, Medical College of Jiangsu University, Zhenjiang 212001, Jiangsu Province, China
  • About author:Chen Pingbo, Physician, Department of Orthopedics, Yijishan Hospital of Wannan Medical College, Wuhu 241000, Anhui Province, China
  • Supported by:
    Regional Science Foundation Project of National Natural Science Foundation of China, No. 81571830 (to ZZJ); Regional Science Foundation Project of National Natural Science Foundation of China, No. 81501077 (to CQ); Young and Middle-aged Natural Foundation of Wannan Medical College, No. WK2019F16 (to CPB)

摘要:

文题释义:
京尼平:是栀子苷经β-葡萄糖苷酶水解后的产物,是一种优良的天然生物交联剂,可以与蛋白质、胶原、明胶和壳聚糖制作生物材料,如人造骨骼、伤口包扎等,其毒性远低于戊二醛和其他常用化学交联剂。
音猬因子:是5种刺猬因子中的一种,以电子游戏角色超音速刺猬命名,由腹背侧神经管结构产生,可维持神经上皮细胞的存活、促进神经管的形成,在神经系统的发育、分化过程中具有调控功能。
纤维蛋白:是来源于血液的细胞外基质,作为细胞移植和生长因子缓释的载体用于修复脊髓损伤已取得令人满意的效果。

背景:组织工程支架移植是修复脊髓损伤最有应用前景的治疗手段之一,通过组织工程支架募集内源性神经干细胞并促进其分化为神经细胞,进而修复脊髓损伤。
目的:观察京尼平交联的音猬因子复合纤维蛋白支架移植到大鼠脊髓损伤处的修复作用,探讨其作用机制。
方法:分别制备纤维蛋白胶、音猬因子复合纤维蛋白支架、京尼平交联音猬因子复合纤维蛋白支架,检测京尼平交联音猬因子复合纤维蛋白支架的体外降解率与缓释性能。将120只雌性SD大鼠随机分为4组,每组30只,A组T10-T11脊髓损伤部位不植入任何材料,B组T10-T11脊髓损伤部位植入纤维蛋白胶,C组T10-T11脊髓损伤部位植入音猬因子复合纤维蛋白支架,D组T10-T11脊髓损伤部位植入京尼平交联音猬因子复合纤维蛋白支架,术后每周对大鼠进行运动功能BBB评分,术后12周取脊髓损伤处及周围脊髓组织,进行组织形态与Western  Blot检测。
结果与结论:①音猬因子复合纤维蛋白支架14 d基本完全降解,京尼平交联的纤维蛋白支架14 d的降解率不超过20%;音猬因子复合纤维蛋白支架7 d基本完全释放了音猬因子;京尼平交联音猬因子复合纤维蛋白支架在1-3 d爆发释放音猬因子,4-14 d内缓慢释放音猬因子,具有良好的缓释性能;②随着时间的延长,各组大鼠的运动功能BBB评分升高,B、C组术后12周的BBB评分高于A组(P < 0.05),D组术后12周的BBB评分高于B、C组(P < 0.05);③苏木精-伊红染色显示,A组脊髓损伤处恢复最差,D组恢复最好;④免疫组化染色与Western  Blot检测显示,A组巢蛋白、神经生长相关蛋白43、神经丝蛋白200、髓鞘碱性蛋白表达量最低,胶质纤维酸性蛋白表达最高;D组巢蛋白、神经生长相关蛋白43、神经丝蛋白200、髓鞘碱性蛋白表达量最高,胶质纤维酸性蛋白表达最低;⑤结果表明,京尼平交联音猬因子复合纤维蛋白支架具有良好的缓释性能,可促进大鼠损伤脊髓的修复。
缩略语:京尼平交联音猬因子复合纤维蛋白支架:fibrin-genipin-sonic hedgehog,Fibrin-GP-SHH

https://orcid.org/0000-0003-4149-7909 (陈平波) 

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: 京尼平, 音猬因子, 纤维蛋白, 缓释脊髓损伤, 交联, 支架, 移植, 修复

Abstract: BACKGROUND: Tissue engineering scaffold transplantation is one of the most promising therapeutic methods for repairing spinal cord injury. Endogenous neural stem cells are recruited through tissue engineering scaffolds and promoted to differentiate into nerve cells to repair spinal cord injury.
OBJECTIVE: To observe the effect of transplantation of genipin crosslinked sonic hedgehog (Shh) composite fibrin scaffolds into the injured spinal cord of rats on the repair of spinal cord injury and to explore the underlying mechanism. 
METHODS: Fibrin glue, Shh composite fibrin scaffold, and genipin crosslinked Shh composite fibrin scaffold were prepared separately. In vitro degradation rate and sustained release performance of genipin crosslinked Shh composite fibrin scaffold were detected. Totally 120 female Sprague-Dawley rats were randomly divided into four groups (n=30). No material was implanted at the T10-T11 spinal cord injury site in group A. Fibrin glue was implanted in the T10-T11 spinal cord injury site of group B. T10-T11 spinal cord injury site was implanted with Shh composite fibrin scaffold in group C. Genipin crosslinked Shh composite fibrin scaffold was implanted at the T10-T11 spinal cord injury site in group D. After surgery, the rats were scored with BBB motor function every week. At 12 weeks after surgery, spinal cord tissue at and around the injury site was harvested and used for morphological observation and western blot assay. 
RESULTS AND CONCLUSION: (1) Shh composite fibrin scaffold was basically completely degraded at 14 days. The degradation rate of the genipin crosslinked fibrin scaffold at 14 days did not exceed 20%. The Shh composite fibrin scaffold basically released the Shh at 7 days. Genipin crosslinked Shh composite fibrin scaffold released Shh explosively in 1-3 days, and slowly released Shh within 4-14 days, which had a good slow-release property. (2) As time went by, the BBB scores of motor function of rats increased in each group. The BBB scores of groups B and C were higher than those of group A at 12 weeks after surgery (P < 0.05). The BBB score of group D was higher than those in groups B and C at 12 weeks after surgery (P < 0.05). (3) Hematoxylin-eosin staining showed that the recovery from spinal cord injury site in group A was the worst, and the recovery in group D was the best. (4) Immunohistochemical staining and western blot assay showed that the expression of nestin, nerve growth-associated protein 43, neurofilament protein 200, and myelin basic protein was the lowest, and the expression of glial fibrillary acidic protein was the highest in group A. The expression of nestin, nerve growth-associated protein 43, neurofilament protein 200, and myelin basic protein was the highest, and glial fibrillary acidic protein expression was the lowest in group D. (5) It is concluded that genipin crosslinked Shh composite fibrin scaffold had a good slow-release effect and could promote the repair of rat spinal cord.

Key words: genipin, sonic hedgehog, fibrin, slow-release, spinal cord injury, crosslinking, scaffolds, transplant, repair

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