中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (30): 4469-4475.doi: 10.3969/j.issn.2095-4344.2016.30.009

• 纳米生物材料 nanobiomaterials • 上一篇    下一篇

自体释氧纳米仿生支架复合软骨细胞构建颞颌关节

王 鸿,廖天安,王 涛,符良斌,胡广伟,邓 伟   

  1. 海南省人民医院口腔科,海南省海口市  570311
  • 出版日期:2016-07-15 发布日期:2016-07-15
  • 通讯作者: 廖天安,主任医师,教授,硕士生导师,海南省人民医院口腔科,海南省海口市 570311
  • 作者简介:王鸿,男,1976年生,海南省海口市人,汉族,2000年中山医科大学毕业,副主任医师,主要从口腔颌面部肿瘤根治,创伤整复等方面研究。

Autologous oxygen-delivering biomimetic nanoscaffold composited with chondrocytes reconstructs the temporomandibular joint

Wang Hong, Liao Tian-an, Wang Tao, Fu Liang-bin, Hu Guang-wei, Deng Wei   

  1. Department of Stomatology, Hainan Provincial People’s Hospital, Haikou 570311, Hainan Province, China
  • Online:2016-07-15 Published:2016-07-15
  • Contact: Liao Tian-an, Chief physician, Professor, Master’s supervisor, Department of Stomatology, Hainan Provincial People’s Hospital, Haikou 570311, Hainan Province, China
  • About author:Wang Hong, Associate chief physician, Department of Stomatology, Hainan Provincial People’s Hospital, Haikou 570311, Hainan Province, China

摘要:

文章快速阅读:

文题释义:
自体释氧纳米羟基磷灰石/壳聚糖复合支架:
将一定量壳聚糖溶入六氟异丙醇中,制成壳聚糖溶液,低温搅拌溶解,与纳米羟基磷灰石及过氧化物混合,在超声匀质分散成均匀溶液,加入京尼平交联,然后将溶液倒入含石蜡颗粒的模具中制备样品,进行冷冻相分离。冷冻干燥后正己烷去除石蜡再进行冷冻干燥,得到释氧纳米羟基磷灰石/壳聚糖复合支架。
外力压迫髁状突部位软骨细胞的变化:可激活细胞增殖活性,而减少细胞分泌活性,当注射肉毒素A时可导致软骨增殖层的细胞凋亡,抑制下颌骨的发育。因此髁状突部位软骨细胞受到受到外界影响,当该部位骨折发生时结构受到破坏,软骨细胞也进一步发生相应的病理变化。

 

背景:将自体释氧纳米仿生支架复合软骨细胞在模拟微重力下复合培养构建的活性组织工程骨,不仅具有优良成骨的潜在特性,而且具有自体释氧功能,能有效防止早期血管化不足缺氧导致的移植失败。
目的:观察自体释氧纳米仿生支架复合软骨细胞修复不同类型颞颌关节髁状突骨折的效果。
方法:将30只SD大鼠随机分为3组,每组10只,其中1组为正常对照,实验1组建立颞颌关节髁状突纵行骨折模型,植入自体释氧纳米羟基磷灰石/壳聚糖支架与软骨细胞;实验2组建立颞颌关节髁状突横断骨折模型,植入自体释氧纳米羟基磷灰石/壳聚糖支架与软骨细胞。植入后1,3,6周,采用免疫荧光法检测增殖细胞核抗原阳性细胞数,使用TUNEL法检测软骨细胞凋亡情况,采用RT-PCR方法检查软骨内成骨标志物Ⅱ型胶原、促软骨形成基因、血管内皮生长因子的表达。
结果与结论:①实验1组、实验2组不同时间点的增殖细胞核抗原阳性细胞数高于正常对照组(P < 0.05),植入后3,6周的软骨细胞凋亡数低于正常对照组(P < 0.05),植入后3,6周的Ⅱ型胶原、促软骨形成基因、血管内皮生长因子表达高于正常对照组(P < 0.05);②实验1组植入后3,6周的增殖细胞核抗原阳性细胞数低于实验2组(P < 0.05),植入后3周的软骨细胞凋亡数低于实验2组(P < 0.05),植入后3,6周的Ⅱ型胶原、促软骨形成基因、血管内皮生长因子表达高于实验2组(P < 0.05);③结果表明:自体释氧纳米仿生支架复合软骨细胞修复不同类型颞颌关节髁状突骨折有着一定的差异性。

ORCID: 0000-0002-6630-3413(廖天安)

关键词: 生物材料, 纳米材料, 自体释氧纳米仿生支架复合软骨细胞, 颞颌关节髁状突骨折, 不同类型骨折, 软骨细胞, 增殖, 凋亡, 软骨内成骨

Abstract:

BACKGROUND: The autologous oxygen-delivering biomimetic nanoscaffold is composited with chondrocytes in simulated microgravity to construct the active tissue-engineered bone, which not only has excellent osteogenic potential characteristics, but also has autologous releasing oxygen, and additionally can effectively prevent early transplant failure caused by sufficient revascularization and hypoxia.
OBJECTIVE: To investigate the effects of autologous oxygen-delivering biomimetic nanoscaffold composited with chondrocytes on repairing different types of temporomandibular joint condylar fractures.
METHODS: Totally 30 Sprague-Dawley rats were randomly divided into control group, experimental groups 1 and 2 (n=10 per group). The autologous oxygen-delivering nano-hydroxyapatite/chitosan scaffold composited with chondrocytes were transplanted into rats with temporomandibular joint condylar longitudinal fracture in the experimental group 1 and those with temporomandibular joint condylar transverse fracture in the experimental group 2, respectively. At 1, 3 and 6 weeks after transplantation, the number of proliferating cell nuclear antigen-positive cells was detected by immunofluorescence assay; the chondrocyte apoptosis was detected using TUNEL method, and expressions of collagen type II, Sox9 and vascular endothelial growth factor were observed by RT-PCR technology.
RESULTS AND CONCLUSION: The number of proliferating cell nuclear antigen-positive cells in the experimental groups 1 and 2 were significantly higher than that in the control group at different time points after transplantation (P < 0.05). At 3 and 6 weeks after transplantation, the number of apoptotic chondrocytes in the experimental groups 1 and 2 was significantly lower than that in the control group (P < 0.05); significantly higher and highest expressions of collagen type II, Sox9 and vascular endothelial growth factor were found in the experimental groups 2 and 1 compared with the control group, respectively (P < 0.05). Additionally, compared with the experimental group 2, the number of proliferating cell nuclear antigen-positive cells was significantly lower in the experimental group 1 at 3 and 6 weeks after transplantation (P < 0.05); the number of apoptotic chondrocytes was significantly lower in the experimental group 1 at 3 weeks after transplantation (P < 0.05). These results indicate that autologous oxygen-delivering biomimetic nanoscaffold composited with chondrocytes to repair different types of temporomandibular joint condylar fractures presents some different outcomes.

Key words: Nanocomposites, Chondrocytes, Mandibular Condyle, Tissue Engineering

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