中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (24): 4515-4520.doi: 10.3969/j.issn.2095-4344.2013.24.021

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

Wistar大鼠的咬肌放射损伤模型

董 刚1, 2,郑建金1,李 涛1,徐 欣2,卢恕来1   

  1. 1 青岛市市立医院口腔科,山东省青岛市  266011
    2 山东大学口腔医学院种植中心,山东省济南市  250012
  • 收稿日期:2012-09-12 修回日期:2012-10-08 出版日期:2013-06-11 发布日期:2013-06-11
  • 通讯作者: 郑建金,教授,硕士生导师,主要从事口腔颌面外科的研究。 ZHjj19631016@sina.com
  • 作者简介:董刚☆,男,1974年生,山东省滨州市人,汉族,山东大学在读博士,主治医师,主要从事颌面部肿瘤与种植修复的研究。 donggangann@sina.com
  • 基金资助:

    青岛市科技局项目(08-2-1-5-nsh,11-2-3-2-(7)-nsh);青岛市卫生局项目(2008-wsj024,2012-wsj051)

A Wistar rat model of radiation-induced masseter injury

Dong Gang1, 2, Zheng Jian-jin1, Li Tao1, Xu Xin2, Lu Shu-lai1   

  1. 1 Department of Stomatology, Qingdao Municipal Hospital, Qingdao  266011, Shandong Province, China
    2 Implant Center, Stomatological Medical College of Shandong University,Jinan  250012, Shandong Province, China
  • Received:2012-09-12 Revised:2012-10-08 Online:2013-06-11 Published:2013-06-11
  • Contact: Zheng Jian-jin, Professor, Master’s supervisor, Department of Stomatology, Qingdao Municipal Hospital, Qingdao 266011, Shandong Province, China ZHjj19631016@sina.com
  • About author:Dong Gang☆, Studying for doctorate, Attending physician, Department of Stomatology, Qingdao Municipal Hospital, Qingdao 266011, Shandong Province, China; Implant Center, Stomatological Medical College of Shandong University, Jinan 250012, Shandong Province, China donggangann@sina.com
  • Supported by:

    Key Project of Qingdao Science and Technology Bureau, No. 08-2-1-5-nsh*, 11-2-3-2-(7)-nsh*; Project of Qingdao Health Bureau, No. 2008-wsj024*, 2012-wsj051*

摘要:

背景:构建稳定可靠的咬肌放射损伤模型对颌面部肿瘤放疗的相关研究有重要意义。
目的:以放射剂量40 Gy照射后Wistar大鼠咬肌构建大鼠咬肌放射损伤模型。
方法:成年Wistar大鼠20只,随机分成正常对照组和放射损伤组。放射损伤组采用直线加速器照射大鼠咬肌区累积40 Gy制造咬肌放射损伤。在28 d后,在光镜及电镜下观察咬肌放射区病理改变,RT-PCR检测转化生长因子β1的基因表达。
结果与结论:40 Gy照射后28 d大鼠咬肌区出现结构受损、血管密度减低(P < 0.01)等放射损伤表现,同时引起转化生长因子β1的基因表达升高(P < 0.001)等机体被动修复表现。结果证实Wistar大鼠咬肌区直线加速器40 Gy照射可以作为咬肌放射损伤模型。

关键词: 组织构建, 组织构建实验造模, 放射损伤, 动物模型, 转化生长因子β1, 血管密度, 咬肌, 放射疗法, 颌面部, 超微结构, 基因表达, 病理改变, 其他基金

Abstract:

BACKGROUND: Construction of a stable animal model of radiation-induced masseter injury is significant for the research of maxillofacial region tumor.
OBJECTIVE: To establish the animal model of Wistar rats with radiation-induced masseter injury after irradiated with the radiation dose of 40 Gy.
METHODS: A total of 20 male adult Wistar rats were selected and randomly divided into radiation injury group and control group. Radiation injury group was radiated with linear accelerator at a dose of 40 Gy in the masseter tissue. After irradiated for 28 days, pathological changes in the masseter tissue of the radiation injury group and control group were observed by light microscope and electron microscope; the gene expression of transforming growth factor-β1 was detected by reverse transcription-PCR.
RESULTS AND CONCLUSION: After irradiated for 28 days at the dose of 40 Gy, the irradiation injury of structural damage and reduced vascular density were observed in the masseter tissue (P < 0.01), and the gene expression of transforming growth factor-β1 was increased (P < 0.001). The result indicates that masseter tissue irradiated with linear accelerator at a dose of 40 Gy can be considered as the model of radiation-induced masseter injury.

Key words: tissue construction, experimental modeling in tissue construction, radiation injury, animal model, transforming growth factor-beta 1, vascular density, masseter, radiation therapy, maxillofacial, ultrastructure, gene expression, pathological changes, other grants-supported paper

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