中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (7): 981-986.doi: 10.3969/j.issn.2095-4344.2016.07.009

• 骨组织构建 bone tissue construction • 上一篇    下一篇

辛伐他汀干预卵巢切除大鼠骨密度和生物力学性能的变化

张 岩1,刘 昊1,邢 磊1,张国彬2,田发明3   

  1. 1华北理工大学附属医院,河北省唐山市 063000;华北理工大学,2研究生学院,3医学实验研究中心,河北省唐山市 063000
  • 收稿日期:2015-12-24 出版日期:2016-02-12 发布日期:2016-02-12
  • 通讯作者: 田发明,博士,副教授,硕士生导师,华北理工大学医学实验研究中心,河北省唐山市 063000
  • 作者简介:张岩,男,1971年生,河北省阜城县人,汉族,2007年华北煤炭医学院毕业,硕士,主治医师,主要从事中老年多发骨关节疾病的研究。
  • 基金资助:
    河北省高等学校科学研究计划(QN20131007);河北省自然科学基金(H2013209255);唐山市老年医学重点实验室资助项目(14140221B)

Effect of simvastatin on bone mineral density and biomechanical properties of ovariectomized rats

Zhang Yan1, Liu Hao1, Xing Lei1, Zhang Guo-bin2, Tian Fa-ming3   

  1. 1Affiliated Hospital, North China University of Science and Technology, Tangshan 063000, Hebei Province, China; 2Graduate School, 3Medical Research Center, North China University of Science and Technology, Tangshan 063000, Hebei Province, China
  • Received:2015-12-24 Online:2016-02-12 Published:2016-02-12
  • Contact: Tian Fa-ming, M.D., Associate professor, Master’s supervisor, Medical Research Center, North China University of Science and Technology, Tangshan 063000, Hebei Province, China
  • About author:Zhang Yan, Master, Attending physician, Affiliated Hospital, North China University of Science and Technology, Tangshan 063000, Hebei Province, China
  • Supported by:

    the Scientific Research Project of Hebei Universities and Colleges, No. QN20131007; the Natural Science Foundation of Hebei Province, No. H2013209255; Tangshan Key Laboratory Project of Geriatric Medicine, No. 14140221B

摘要:

文章快速阅读:

文题释义:

骨密度:骨密度是骨质量的一个重要标志,是反映骨质疏松程度,预测骨折危险性的重要依据。由于测量仪器的日益改进和先进软件的开发,使该方法可用于不同部位,测量精度显著提高。除可诊断骨质疏松症之外,尚可用于临床药效观察和流行病学调查,在预测骨质疏松性骨折方面有显著的优越性。
卵巢切除大鼠:大鼠卵巢切除模型是使用最普遍且研究中最广泛用于骨质疏松症的动物模型,建立方法为背侧部双切口与腹部正中切口两种方式切除大鼠卵巢。由于大鼠在雌激素缺乏后骨代谢变化情况与人相似,大鼠卵巢切除模型是对人类绝经后骨质疏松最为接近的模拟。因此其在骨质疏松病因学、病理生理学、诊断学、治疗药物药代动力学及预防学等方面具有较高的研究价值。

 

背景:降脂类药物辛伐他汀表现出成骨作用潜能,有望成为新型促成骨类药物,但其体内干预作用效果尚存争议,观察部位的选择是否影响实验结论尚无确切证据。

目的:观察辛伐他汀体内给药对卵巢切除大鼠骨丢失模型股骨及椎体骨量和生物力学性能的影响。

方法:6月龄雌性SD大鼠24只,随机分为3组,每组8只。卵巢切除组、卵巢切除加辛伐他汀干预组大鼠在双侧卵巢切除后第2天分别接受安慰剂和辛伐他汀5 mg/(kg/d)干预;假手术组只暴露卵巢,不予切除,直接缝合。8周后处死所有大鼠,采用ELISA法检测血清Ⅰ型前胶原氨基端前肽水平,取第4,5腰椎和股骨,双能X射线法检测大鼠第5腰椎和左侧股骨骨密度,压缩试验(椎骨)和三点弯曲试验(股骨)检测第4腰椎和右侧股骨最大载荷、弹性模量等生物力学指标。

结果与结论:①卵巢切除组和卵巢切除+辛伐他汀组Ⅰ型前胶原氨基端前肽水平显著高于假手术组。②卵巢切除大鼠第5腰椎和股骨骨密度均显著低于假手术组(P < 0.05),卵巢切除+辛伐他汀第5腰椎骨高于卵巢切除组(P < 0.05),股骨骨密度高于卵巢切除组,但差异无显著性意义。③卵巢切除组大鼠第4腰椎最大载荷、弹性模量均显著低于假手术组和卵巢切除+辛伐他汀组;卵巢切除组股骨弹性模量显著低于假手术组和卵巢切除+辛伐他汀组。结果证实辛伐他汀可部分阻止卵巢切除大鼠骨量丢失,对椎体骨的作用较股骨更显著,椎体较股骨更适于分析生物力学性能。 
ORCID: 0000-0001-7083-3380(田发明)

关键词: 组织构建, 骨组织工程, 骨质疏松, 辛伐他汀, 骨密度, 生物力学, 卵巢切除术, 河北省自然科学基金

Abstract:

BACKGROUND: Osteoporosis and its complications severely threaten the elder’s health. Simvastatin, widely accepted as a lipid-lowering drug, is reported to potentially promote bone formation, but it is in debate when orally administered, and there is no evidence to support whether this is due to the region difference.
OBJECTIVE: To investigate the effect of orally administered simvastatin on bone mass and biomechanical properties of the femur and vertebrae in osteopenia rats induced by ovariectomy (OVX).
METHODS: Twenty-four 6-month-old female Sprague-Dawley rats were subjected to OVX+orally administered saline vehicle (OVX group, n=8), OVX+orally administered simvastatin (5 mg/kg/d; intervention group, n=8) or sham surgery (sham group, n=8). After 8 weeks of treatment, all rats were sacrificed and the level of procollagen type I N-terminal propeptide in blood serum was assessed by ELISA. Bone mineral density was determined in the L5 vertebra and left femur using dual-energy X-rays. Furthermore, the biomechanical properties of the L4 vertebra and right femur, including maximum load and elastic modulus, were detected by compression testing and three-point bending test, respectively.
RESULTS AND CONCLUSION: The serum level of procollagen type I N-terminal propeptide in the sham group was significantly lower than that in the other two groups. OVX rats showed significantly lower bone mineral density in both the L5 vertebra and left femur than sham rats (P < 0.05). Rats in the intervention group showed higher bone mineral density than those in the OVX group, with statistically significant difference in the L5 vertebra (P < 0.05), but insignificant difference in the femur. Maximum load and elastic modulus of the L4 vertebra in the OVX group were significantly lower than those in the sham and intervention group. Markedly lower elastic modulus of the femur was found in the OVX group than the sham and intervention groups. These findings demonstrate that simvastatin treatment can partially prevent bone loss in OVX rats with more notable effect on the vertebrae than the femur, and for this model, the vertebra is superior to the femur used in biomechanical test.
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