中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (8): 1166-1171.doi: 10.3969/j.issn.2095-4344.3043

• 口腔组织构建 oral tissue construction • 上一篇    下一篇

浓缩生长因子修复兔髁突全层软骨损伤

吴  训1,孟娟红1,张建运2,王  亮1   

  1. 北京大学口腔医学院·口腔医院,1口腔颌面外科,2口腔病理科,口腔数字化医疗技术和材料国家工程实验室,口腔数字医学北京市重点实验室,北京市   100081
  • 收稿日期:2020-03-11 修回日期:2020-03-17 接受日期:2020-04-21 出版日期:2021-03-18 发布日期:2020-12-10
  • 通讯作者: 孟娟红,主任医师,副教授,北京大学口腔医学院·口腔医院口腔颌面外科,北京市 100081
  • 作者简介:吴训,男,1992年生,山东省青岛市人,汉族,北京大学口腔医学院在读硕士,医师,主要从事颞下颌关节相关疾病的研究。
  • 基金资助:


Concentrated growth factors in the repair of a full-thickness condylar cartilage defect in a rabbit

Wu Xun1, Meng Juanhong1, Zhang Jianyun2, Wang Liang1   

  1. 1Department of Oral and Maxillofacial Surgery, 2Department of Oral Pathology, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
  • Received:2020-03-11 Revised:2020-03-17 Accepted:2020-04-21 Online:2021-03-18 Published:2020-12-10
  • Contact: Meng Juanhong, Chief physician, Associate professor, Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
  • About author:Wu Xun, Master candidate, Physician, Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China

摘要:

文题释义:
浓缩生长因子:获取静脉血然后通过特定离心方式得到的一种富含多种生长因子及纤维蛋白的自体血液浓缩物即浓缩生长因子,其在促进组织修复再生方面具有积极作用。
髁突全层软骨损伤:用球钻在颞下颌关节髁突软骨表面打孔,造成损伤区全层软骨缺损并穿透软骨下皮质至骨髓腔,骨髓腔内血液溢出充填损伤区。

背景:浓缩生长因子对组织修复有促进作用,目前尚缺乏其对髁突软骨修复影响的研究。
目的:研究浓缩生长因子对兔颞下颌关节髁突全层软骨损伤修复的影响。
方法:采集兔静脉血制备浓缩生长因子。建立兔双侧髁突穿透软骨下骨皮质的全层软骨损伤模型,实验侧损伤区充填浓缩生长因子,对照侧自然愈合。分别于术后2,6,12周取材并进行组织形态学观察;采用改良Pineda软骨修复评分评价软骨修复程度;测定兔浓缩生长因子中部分生长因子释放速率随时间的变化。实验已通过北京大学医学部动物伦理委员会审核批准,批准号为LA201809。
结果与结论:①术后2周实验侧和对照侧缺损内可见纤维样及软骨样组织充填;实验侧甲苯胺蓝染色较均匀,对照侧细胞间纤维样组织穿插,甲苯胺蓝染色不均匀;术后6,12周实验侧仍可见软骨样组织修复,对照侧多见纤维样组织增生覆盖,甲苯胺蓝染色不着色;②改良Pineda软骨修复评分:术后6周及12周实验侧修复的软骨样组织形态评分优于对照侧;实验侧12周较2周修复软骨样组织形态差异不明显(P > 0.05),而对照侧12周较2周修复组织软骨成分减少,软骨修复评分增高,差异有显著性意义(P < 0.05);③ELISA实验结果表明兔浓缩生长因子中胰岛素样生长因子1、转化生长因子β1、碱性成纤维细胞生长因子、血管内皮细胞生长因子可持续释放14 d以上,平均释放速率随时间递减;④以上结果表明,浓缩生长因子对兔髁突全层软骨损伤的早期软骨修复有一定促进作用。

https://orcid.org/0000-0002-6975-3727 (吴训) 
中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程


关键词: 浓缩生长因子, 颞下颌关节, 髁突, 软骨, 修复, 实验,

Abstract: BACKGROUND: Concentrated growth factors can promote the repair of tissue injuries. Its effect on the repair of condylar cartilage injuries is rarely documented.
OBJECTIVE: To investigate the effect of concentrated growth factors on the repair of full-thickness condylar cartilage defects in rabbits.
METHODS: Concentrated growth factors were prepared by collecting the venous blood of rabbits. A full-thickness cartilage defect penetrating the subchondral cortex was created at both sides of condyle in rabbits. The experimental side was filled with concentrated growth factors, and the control side healed naturally. The histomorphology was examined at 2, 6 and 12 weeks postoperatively. The degree of cartilage repair was evaluated by the modified Pineda cartilage repair scale. The release rate of concentrated growth factors was measured at different observational times. The study protocol was approved by the Experimental Animal Ethics Committee of Peking University Health Science Center (approval No. LA201809).
RESULTS AND CONCLUSION: Fillings of fibrous and cartilage-like tissue in the defect were observed on both of the experimental and the control sides at 2 weeks postoperatively. Toluidine blue was stained homogeneously in the experimental side. Intercellular fibrous tissues with interpenetrating and heterogeneous toluidine blue staining appeared in the control side. At 6 and 12 weeks postoperatively, the repaired cartilage was identified in the experimental side. On the contrary, fibroid tissue hyperplasia was found in the control side, where toluidine blue staining showed no heterochromatin. Based on the modified Pineda cartilage repair score, the mean value of the total score in the experimental side was better than that in the control side at 6 and 12 weeks postoperatively. The difference in the mean value of the total score (P < 0.05) was significant between 2 and 12 weeks in the control side, but there was no significant difference in the experimental side (P > 0.05). ELISA tests showed that insulin-like growth factor 1, transforming growth factor β1, basic fibroblast growth factor, and vascular endothelial growth factor could be released continuously for more than 14 days. The release rates of these cytokines were decreased with time. These results indicate that concentrated growth factors can improve the early repair of full-thickness condylar cartilage defects in rabbits to some extent. 

Key words: concentrated growth factor, temporomandibular joint, condyle, cartilage, repair, experiment, rabbit

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