中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (2): 246-251.doi: 10.12307/2022.895

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

积雪草酸对骨质疏松模型大鼠生物力学特性与骨小梁面积及Runx2蛋白的影响

陈晓驷1,谭小艳2,刘田丰2,韩登鹏2,魏  波2,胡资兵2,吴少科2   

  1. 广东医科大学附属医院,1国际医疗与特需医疗病区,2骨外科,广东省湛江市  524023
  • 收稿日期:2021-01-13 接受日期:2021-12-17 出版日期:2023-01-18 发布日期:2022-06-18
  • 通讯作者: 吴少科,硕士,主任医师,广东医科大学附属医院骨外科,广东省湛江市 524023
  • 作者简介:陈晓驷,女,1984年生,湖北省武汉市人,汉族,2010年广东医科大学毕业,硕士,主要从事老年人骨质疏松预防与治疗研究。
  • 基金资助:
    广东省自然科学基金-粤东西北创新人才联合培养项目(2018A030307019),项目负责人:吴少科

Effects of asiatic acid on biomechanical properties, trabecular area and Runx2 protein in osteoporotic rats

Chen Xiaosi1, Tan Xiaoyan2, Liu Tianfeng2, Han Dengpeng2, Wei Bo2, Hu Zibing2, Wu Shaoke2   

  1. 1International and Special Medical Service Ward, 2Department of Orthopedics, Affiliated Hospital of Guangdong Medical University, Zhanjiang 524023, Guangdong Province, China
  • Received:2021-01-13 Accepted:2021-12-17 Online:2023-01-18 Published:2022-06-18
  • Contact: Wu Shaoke, Master, Chief physician, Department of Orthopedics, Affiliated Hospital of Guangdong Medical University, Zhanjiang 524023, Guangdong Province, China
  • About author:Chen Xiaosi, Master, International and Special Medical Service Ward, Affiliated Hospital of Guangdong Medical University, Zhanjiang 524023, Guangdong Province, China
  • Supported by:
    Guangdong Provincial Natural Science Foundation-Yuedong Northwest Innovative Talents, No. 2018A030307019 (to WSK)

摘要:

文题释义:
积雪草酸:是一种五环三萜酸,具有广泛的生物学作用。积雪草酸对多发性骨髓瘤细胞的增殖活性具有调节作用,可以防治肿瘤恶化,同时抑制骨基质细胞的脂肪分化。积雪草酸作为一种中药活性成分,药效温和持久、不良反应少,应用前景广阔。
RUNX2:这个基因是转录因子runx家族的一员,编码一个具有runt-dna结合域的核蛋白。该蛋白对成骨细胞分化和骨骼形态发育至关重要,并作为核酸和参与骨骼基因表达的调控因子的支架。

背景:研究证实,积雪草酸以浓度依赖的方式促进成骨细胞分化,抑制成骨细胞凋亡,但目前关于积雪草酸对骨生物力学、Runx2蛋白的具体作用机制尚不明确。
目的:探究积雪草酸对骨质疏松大鼠生物力学特征、骨小梁面积及Runx2蛋白的影响。
方法:选用SD大鼠48只,随机分为假手术组、模型组、积雪草酸低剂量组和高剂量组各12只。除假手术组外其余大鼠双侧去卵巢建立骨质疏松模型,假手术组和模型组大鼠术后3 mL/(kg·d)生理盐水灌胃;积雪草酸低剂量组60 mg/(kg·d)积雪草酸灌胃;积雪草酸高剂量组120 mg/(kg·d)积雪草酸灌胃,各组大鼠均干预60 d。RT-PCR、Western blot检测检测骨保护素、Runx2的mRNA和蛋白水平,比较各组大鼠股骨生物力学特征、骨小梁面积及血清炎性因子水平的差异性。
结果与结论:①大鼠最大载荷、刚度、总能量、弹性模量值假手术组高于模型组(P < 0.05);与模型组相比,积雪草酸低、高剂量组上述指标均有所提高(P < 0.05),且积雪草酸高剂量组高于积雪草酸低剂量组(P < 0.05);②骨小梁面积假手术组高于模型组(P < 0.05);模型组低于积雪草酸低、高剂量组(P < 0.05);积雪草酸高剂量组高于低剂量组(P < 0.05);③大鼠血清转化生长因子β1的水平模型组显著低于其他3组(P < 0.05),积雪草酸高剂量组高于低剂量组(P < 0.05);骨钙素、碱性磷酸酶、肿瘤坏死因子α水平模型组显著高于其他3组(P < 0.05),积雪草酸高剂量组低于低剂量组(P < 0.05);④骨保护素和Rnux2 的mRNA表达水平假手术组高于模型组和积雪草酸低剂量组(P < 0.05);积雪草酸高剂量组高于假手术组(P < 0.05);⑤骨保护素、Rnux2蛋白表达水平模型组低于其他3组,积雪草酸高剂量组高于低剂量组;⑥结果说明,积雪草酸可改善骨质疏松模型大鼠骨生物学特征,提高骨小梁面积、降低炎性水平,其作用机制可能与促进Runx2表达有关。

https://orcid.org/0000-0002-6672-2693 (陈晓驷)

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

关键词: 积雪草酸, 骨质疏松大鼠, 生物力学特征, 骨小梁面积, Runx2

Abstract: BACKGROUND: Studies have confirmed that asiatic acid promotes osteoblast differentiation and inhibits osteoblast apoptosis in a concentration-dependent manner. However, the specific mechanism of asiatic acid on bone biomechanics and Runx2 protein is still unclear.
OBJECTIVE: To investigate the effects of asiatic acid on biomechanical characteristics, trabecular area and Runx2 protein expression in osteoporotic rats. 
METHODS: Forty-eight Sprague-Dawley rats were selected and randomly divided into four groups (n=12 per group): sham operation group, model group, low-dose asiatic acid group, and high-dose asiatic acid group. Except for the sham operation group, rats in the other groups were bilaterally ovariectomized to establish osteoporosis models. The rats in the sham operation and model groups were given 3 mL/(kg·d) normal saline after surgery, while those in the low- and high-dose asiatic acid groups were given 60 and 120 mg/(kg·d) asiatic acid by gavage, respectively. Intervention in each group lasted for 60 days. RT-PCR and western blot were used to detect osteoprotegerin and Runx2 at mRNA and protein levels, respectively. Biomechanical characteristics, trabecular bone area and inflammatory factor levels of rats were compared among groups. 
RESULTS AND CONCLUSION: (1) The maximum load, stiffness, total energy and elastic modulus of rats in the sham operation group were higher than those in the model group (P < 0.05). Compared with the model group, both high- and low-dose asiatic acid could increase the above-mentioned indexes (P < 0.05). Moreover, the maximum load, stiffness, total energy and elastic modulus were higher in the high-dose asiatic acid group than the low-dose asiatic acid group (P < 0.05). (2) The trabecular bone area was higher in the sham operation group than the model group (P < 0.05). The trabecular bone area was lower in the model group than the low- and high-dose asiatic acid group (P < 0.05). The trabecular bone area was higher in the high-dose asiatic acid group than the low-dose asiatic acid group (P < 0.05). (3) The serum level of transforming growth factor-β1 was significantly lower in the model group than the other three groups (P < 0.05) and significantly higher in the high-dose asiatic acid group than the low-dose asiatic acid group (P < 0.05). The levels of osteocalcin, alkaline phosphatase and tumor necrosis factor-αwere significantly higher in the model group than the other three groups (P < 0.05) and significantly lower in the high-dose asiatic acid group than the low-dose group (P < 0.05). (4) The mRNA expression levels of osteoprotegerin and Rnux2 were higher in the sham operation group than the model and low-dose asiatic acid groups (P < 0.05), and the mRNA expression levels of osteoprotegerin and Rnux2 in the high-dose asiatic acid group were higher than those in the sham operation group (P < 0.05). (5) The protein expression levels of osteoprotegerin and Rnux2 were lower in the model group than the other three groups and higher in the high-dose asiatic acid group than the low-dose asiatic acid group. To conclude, asiatic acid can improve the biological characteristics of bone tissue, increase the area of trabecular bone, and reduce the level of inflammation in osteoporotic rats. Its mechanism of action may be related to the promotion of Runx2 expression.

Key words: asiatic acid, osteoporotic rat, biomechanical characteristics, trabecular area, Runx2

中图分类号: