中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (24): 3858-3863.doi: 10.3969/j.issn.2095-4344.2017.24.015

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

激素联合去卵巢诱导大鼠股骨骨质疏松复合模型的建立

张玉卓1,沈耿杨1,张志达1,招文华1,黄锦菁1,余 翔1,丘 婷1,卢永锵1,詹玫琦1,杨志东2,姚珍松2,梁 德2   

  1. 1广州中医药大学,广东省广州市 510405;2广州中医药大学第一附属医院,广东省广州市 510405
  • 修回日期:2017-07-26 出版日期:2017-08-28 发布日期:2017-08-30
  • 通讯作者: 梁德,硕士,教授,广州中医药大学第一附属医院,广东省广州市 510405
  • 作者简介:张玉卓,女,1990年生,河北省石家庄市人,汉族,广州中医药大学在读硕士,主要从事中西医结合临床方面的研究。
  • 基金资助:

    国家自然科学基金(81503591、81674000);广东省自然科学基金(2014A030310082);广东省科学技术厅-广东省中医药科学院联合科研项目(2016A030313645,2014A020221021);广州中医药大学第一临床医学院优秀博士学位论文培育项目(YB201501,YB201602);广州中医药大学第一附属医院创新强院项目(2015QN03)

Establishment of a rat osteoporotic model by ovariectomy combined with glucocorticoid exposure

Zhang Yu-zhuo1, Shen Geng-yang1, Zhang Zhi-da1, Zhao Wen-hua1, Huang Jin-jing1, Yu Xiang1, Qiu Ting1, Lu Yong-qiang1, Zhan Mei-qi1, Yang Zhi-dong2, Yao Zhen-song2, Liang De2   

  1. 1Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China; 2the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • Revised:2017-07-26 Online:2017-08-28 Published:2017-08-30
  • Contact: Liang De, Master, Professor, the First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • About author:Zhang Yu-zhuo, Studying for master’s degree, Guangzhou University of Chinese Medicine, Guangzhou 510405, Guangdong Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81503591 and 81674000; the Natural Science Foundation of Guangdong Province, No. 2014A030310082; the Research Project of Guangdong Provincial Department of Science and Technology-Guangdong Academy of Chinese Medicine, No. 2016A030313645 and 2014A020221021; the Excellent Doctoral Dissertation Training Project of the First Clinical Medical School of Guangzhou University of Chinese Medicine, No. YB201501 and YB201602; the Innovation and Hospital Improvement Project of the First Affiliated Hospital of Guangzhou University of Chinese Medicine, No. 2015QN03

摘要:

文章快速阅读:

文题释义:
骨质疏松症:
是一种全身性代谢性骨病,其特征是骨量减少、骨微细结构破坏及容易发生脆性骨折。疼痛、身长缩短、驼背、骨折及呼吸功能下降是骨质疏松症的常见症状。根据病因来分类,骨质疏松症可分为老年性骨质疏松症、绝经后骨质疏松症、继发性骨质疏松症、特发性骨质疏松症等不同类型。本文研究的骨质疏松症包括激素诱导的继发性骨质疏松症及去卵巢诱导的绝经后骨质疏松症。
复合模型:顾名思义,是2种或2种以上的模型复合在一起的结果,即在同一动物模型上,具备两种不同疾病的特点。实验使用的复合模型具备两种不同的骨质疏松症特点,一是激素诱导的继发性骨质疏松症(激素性骨质疏松症),二是去卵巢诱导的绝经后骨质疏松症。

 

摘要
背景:
使用激素的绝经后女性人群在临床上并不少见,由于具备雌激素水平不足及使用激素两个因素,故骨量流失的速度更快,更容易发生脆性骨折。目前对于研究与该人群相匹配的复合模型,即激素联合去卵巢诱导的骨质疏松模型的水平不够深入,相关的分子机制尚未完全阐明。
目的:构建激素联合去卵巢股骨骨质疏松大鼠模型,并探讨复合模型的分子机制。
方法:将3月龄雌性SD大鼠随机分为空白对照组、假手术组及模型组,各10只。空白对照组不造模,假手术组切开腹部剪取少量脂肪组织,模型组从腹部切除双侧卵巢同时连续4周注射地塞米松。
结果与结论:造模后4周,与空白对照组及假手术组相比,模型组离体股骨骨密度、骨小梁数量、相对骨体积显著降低,骨小梁间距显著提高,且骨小梁间距增宽和结构破坏,骨皮质变薄,骨皮质厚度降低,骨组织Runx2 mRNA表达显著下调,Ⅰ型胶原α1、过氧化物酶体增殖物激活受体γ mRNA表达明显升高,组织蛋白酶k mRNA表达呈上升趋势,但差异无显著性意义。提示激素联合去卵巢可快速诱导大鼠股骨骨质疏松,其机制可能与下调Runx2,上调Ⅰ型胶原α1、过氧化物酶体增殖物激活受体γ的mRNA表达有关。

 

关键词: 组织构建, 骨组织工程, 糖皮质激素, 去卵巢, 骨质疏松症, 复合模型, 机制, 绝经后骨质疏松症, Runx2, Ⅰ型胶原α1, 过氧化物酶体增殖物激活受体γ, 国家自然科学基金

Abstract:

BACKGROUND: There are many postmenopausal women taking hormone, which leads to much loss of bone mass, further inducing fragility fractures. The studies on the hormone exposure combined with ovariectomy-induced osteoporotic model are still immature, and the related molecular mechanism remains unclear.
OBJECTIVE: To establish the rat osteoporotic model induced by ovariectomy combined with glucocorticoid exposure and to explore the underlying molecular mechanism.
METHODS: Thirty 3-month-old female Sprague-Dawley rats were randomly divided into blank control, sham and model groups (n=10 per group). The rats in the blank control group received no intervention; rats in the sham group were clipped off a little of coeliac adipose tissue; the model rats received bilateral ovariectomy and 4-week administration of glucocorticoid.
RESULTS AND CONCLUSION: At 4 weeks after modeling, compared with blank control and sham groups, the model group showed significantly lower bone mineral density of the femur, number of bone trabeculae and bone volume/total volume, and significantly wider bone trabecular spacing. Additionally, the model group revealed the damaged bone trabecular structure and thiner cortical bone. The expression level of Runx2 was downregulated whereas both collagen type 1 α1 and peroxisome proliferators activated receptor γ mRNA were upregulated in the model group. These findings suggest that ovariectomized rats exposed to glucocorticoid rapidly develop femur osteoporosis, maybe by downregulating the expression of Runx2, as well as upregualting collagen type 1 α1 and peroxisome proliferators activated receptor γ mRNA.

 

Key words: Osteoporosis, Dexamethasone, Ovary, Tissue Engineering

中图分类号: