中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (36): 5793-5798.doi: 10.3969/j.issn.2095-4344.2017.36.010

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

C57小鼠骨质疏松症伴颅骨极量缺损模型的建立

罗道文1,黄  馗1,王  雷1,罗世洪1,饶鹏程1,肖金刚1,2   

  1. 西南医科大学附属口腔医院,1口颌面修复重建和再生实验室,2口腔颌面外科,四川省泸州市  646000
  • 收稿日期:2017-07-26 出版日期:2017-12-28 发布日期:2018-01-04
  • 通讯作者: 肖金刚,博士,教授,主任医师,硕士研究生导师,西南医科大学附属口腔医院,四川省泸州市 646000
  • 作者简介:罗道文,男,1992年生,汉族,西南医科大学在读硕士,主要从事口腔颌面外科临床与基础研究。
  • 基金资助:

    国家自然科学基金项目(813671125);四川省科技厅项目(2014JY0044);四川省教育厅项目(10-ZB030);四川省卫生厅项目(80170);泸州医学院重点项目(201207);泸州市人民政府-西南医科大学科技战略合作项目(2015LZCYD-S05(2/12))

Establishment of a C57 mouse model of osteoporosis with calvarial critical-size defects

Luo Dao-wen1, Huang Kui1, Wang Lei1, Luo Shi-hong1, Rao Peng-cheng1, Xiao Jin-gang1, 2   

  1. 1Orofacial Reconstruction and Regeneration Laboratory, 2Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Received:2017-07-26 Online:2017-12-28 Published:2018-01-04
  • Contact: Xiao Jin-gang, M.D., Professor, Chief physician, Master’s supervisor, Orofacial Reconstruction and Regeneration Laboratory, Hospital of Stomatology, Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • About author:Luo Dao-wen, Studying for master’s degree, Orofacial Reconstruction and Regeneration Laboratory, Hospital of Stomatology, Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 813671125; the Program of Science & Technology Department of Sichuan Province, No. 2014JY0044; the Project of Education Department of Sichuan Province, No. 10-ZB030; the Project of Health Department of Sichuan Province, No. 80170; the Key Project of Luzhou Medical College, No. 201207; the Luzhou Municipal Government-Southwest Medical University Science and Technology Strategic Cooperation Project, No. 2015LZCYD-S05(2/12)

摘要:

文章快速阅读:


文题释义:
骨极量缺损:又称之为临界骨缺损(Critical size defect,CSD),是指动物依靠自身修复能力不能恢复的最小骨缺损。其目的是减少因动物的年龄、种系、骨缺损所在部位不同等因素对骨缺损愈合的影响,排除自身混杂因素的干扰,从而使建立的骨缺损模型更加地可靠。Gupta等研究确定小鼠颅骨极量缺损为4 mm。
微计算机断层扫描技术(micro computed tomography,Micro-CT):又称微型CT、显微CT,是一种非破坏性的3D成像技术,可以在不破坏样本的情况下清楚了解样本的内部显微结构。它与普通临床的CT最大的差别在于分辨率极高,可以达到微米(μm)级别,目前国内一家自主研发Micro-CT的公司已经将分辨率提高到0.5 μm,具有良好的“显微”作用。Micro-CT可用于医学、药学、生物、考古、材料、电子、地质学等领域的研究。
摘要
背景
:双侧卵巢切除法就被作为研究绝经后骨质疏松的动物模型建立的最常用方法之一,目前对于C57小鼠骨质疏松症伴颅骨极量缺损的模型尚未有明确的研究。
目的:建立骨质疏松症伴颅骨极量缺损的C57小鼠动物模型。
方法:选用8周龄C57雌性小鼠36只随机分为2组,一组行双侧卵巢切除术建立骨质疏松组(模型组),另一组切除双侧卵巢附近与卵巢质量接近的脂肪组织建立对照组(对照组);造模后6周分别取2组小鼠股骨进行Micro-CT扫描和苏木精-伊红染色,确定模型组小鼠骨质疏松症建立成功;然后取模型组和对照组小鼠各6只,在颅顶对称制造2个直径为4 mm的圆形骨缺损,造模后8周行Micro-CT扫描评价颅骨缺损区骨愈合状况。
结果与结论:①造模后6周,模型组较对照组小鼠骨体积分数、骨表面积体积比、骨小梁厚度,骨小梁数量及骨小梁分离度、骨密度显著下降(P < 0.05),骨小梁结构疏松或断裂,骨髓腔变大;②骨缺损造模后8周,两组小鼠颅骨Micro-CT示骨缺损均未自然修复;③结果表明,骨质疏松伴颅骨极量缺损的C57小鼠模型建立成功。

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
ORCID: 0000-0001-5239-2462(罗道文)

关键词: 组织构建, 骨组织工程, 骨质疏松, 卵巢切除术, 颅骨极量缺损, 动物模型, C57小鼠, Micro-CT, 股骨组织切片, 国家自然科学基金

Abstract:

BACKGROUND: Bilateral ovariectomy is a most commonly used method to establish an animal model of postmenopausal osteoporosis. Up to now, little is reported on the C57 mouse model of osteoporosis with calvarial critical-size defects.
OBJECTIVE: To establish the C57 mouse model of osteoporosis with calvarial critical-size defects.
METHODS: Thirty-six C57 mice aged 8 weeks were randomly divided into two groups: the mice in model group received bilateral ovariectomy, and the same weight of fat tissues around the ovaries of the other mice were cut as control group. At 6 weeks after modeling, the mouse femur was removed for micro-CT scan and hematoxylin-eosin staining to testify whether there is a success or failure in animal modeling. Afterwards, six mice were respectively selected from each group, and two round calvarial defects with a diameter of 4 mm were symmetrically made on the parietal bone. The defect healing was evaluated by micro-CT scan at 8 weeks after modeling.
RESULTS AND CONCLUSION: At 6 weeks after modeling, the bone volume fraction, bone surface to volume ratio, trabecular thickness, trabecular number, trabecular spacing and bone mineral density in the modeling group were significantly lower than those in the control group (P < 0.05). In the model group, there were loosen or fractured trabeculae, and enlarged medullary cavity. At 8 weeks after bone defects, showed no significant micro-CT changes in the defect region in both two groups. These findings implicate a success in establishing the C57 mouse model of osteoporosis with calvarial critical-size defects.

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

Key words: Osteoporosis, Ovariectomy, Skull, Tissue Engineering