中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (4): 493-498.doi: 10.3969/j.issn.2095-4344.0079

• 骨组织构建 bone tissue construction •    下一篇

黄精多糖防治绝经后骨质疏松症的分子机制

张  磊1,曾高峰1,宗少晖2,吴平平1,何基琛2,吴云乐2,严芳娜1,芩忠喜2,黄建华2   

  1. 1广西医科大学公共卫生学院,广西壮族自治区南宁市  530021;2广西医科大学第一附属医院脊柱骨病外科,广西壮族自治区南宁市  530021
  • 收稿日期:2017-10-20 出版日期:2018-02-08 发布日期:2018-02-08
  • 通讯作者: 曾高峰,博士,教授,博士生导师,广西医科大学公共卫生学院,广西壮族自治区南宁市 530021
  • 作者简介:张磊,男,1991年生,广西壮族自治区南宁市人,汉族,广西医科大学在读硕士,主要从事营养与疾病的基础性研究。
  • 基金资助:

    国家自然科学基金资助项目(81360279);广西自然科学基金(2015GXNSFAA139150)

Molecular mechanism of polygonatum sibiricum polysaccharide in the prevention and treatment of postmenopausal osteoporosis

Zhang Lei1, Zeng Gao-feng1, Zong Shao-hui2, Wu Ping-ping1, He Ji-chen2, Wu Yun-le2, Yan Fang-na1, Qin Zhong-xi2, Huang Jian-hua2   

  1. 1School of Public Health, Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China; 2Department of Spine and Bone Surgery, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
  • Received:2017-10-20 Online:2018-02-08 Published:2018-02-08
  • Contact: Zeng Gao-feng, M.D., Professor, Doctoral supervisor, School of Public Health, Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
  • About author:Zhang-Lei, Studying for master’s degree, School of Public Health, Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81360279; the Natural Science Foundation of Guangxi Zhuang Autonomous Region, No. 2015GXNSFAA139150

摘要:

文章快速阅读:

文题释义:
黄精多糖:本草纲目记载:“黄精补诸虚,填精髓,使五脏调和,肌肉充盛,骨髓坚强,其力倍增,多年不老,颜色鲜明,发质更黑,齿落更生”。黄精多糖来自于黄精的干燥根茎是黄精的主要活性之一,具有降血糖,降血脂,抗衰老,抗病毒,抗肿瘤,提高免疫力等药理作用。
骨密度:全称为骨矿物质密度,以单位体积或单位面积骨量表示,为一绝对值。在临床上常用双能X射线吸收测定法(DXA)测量骨密度,而又由于不同的骨密度检测仪的绝对值不同,通常使用相对值T值来判断骨密度是否正常,正常参考值在-1和+1之间,当T值低于-2.5时为不正常。骨密度是骨强度的一个重要定量指标,是预测骨折危险性的重要依据,反映了骨质疏松程度。

摘要
背景:
课题组前期研究结果显示黄精多糖具有抗骨质疏松作用,但对其在体内对去卵巢骨质疏松防治效果的分子机制知之甚少。
目的:探究黄精多糖在体内对大鼠骨微结构、骨密度的作用以及对成骨、破骨相关基因mRNA表达的影响机制。 
方法:25只SPF级雌性未受孕的3月龄SD大鼠随机分为5组,假手术组(等体积生理盐水)、模型组,唑来膦酸盐组[0.2 mg/(kg•d)],高剂量黄精多糖组[800 mg/(kg•d)],中剂量黄精多糖组[400 mg/(kg•d)]。除假手术组外均建立去卵巢大鼠模型。术后1周隔天灌胃相应药物,连续12周后将大鼠处死,取其子宫称质量,收集一侧胫骨行Micro-CT骨形态计量学分析,对侧胫骨提骨头RNA行q-PCR检测。
结果与结论:①相较于假手术组,模型组大鼠体质量显著性增加而子宫质量明显降低(P < 0.05);与模型组相比,高剂量黄精多糖组和唑来膦酸盐组均能明显减缓体质量过快增加(P < 0.05);②模型组相较假手术组骨密度下降63%(P < 0.001),经过12周治疗,高剂量黄精多糖组与唑来膦酸盐组相较模型组骨密度均有所增加,分别增加44%和38%(P < 0.05),骨体积分数、骨小粱数量也有所增加(P < 0.05),骨小粱分离度明显降低(P < 0.05);③在体内,高剂量黄精多糖组能明显促进成骨分化相关基因碱性磷酸酶、RUNX2、Col1a1、骨钙素的表达而抑制破骨分化相关基因ACP5、CTSK的表达(P < 0.05),能明显抑制ACP5、CTSK的表达(P < 0.05);④结果说明,高剂量的黄精多糖能够减少去卵巢大鼠的骨丢失、骨密度下降,改善骨微结构破坏,促进成骨相关基因而抑制破骨相关基因mRNA的表达。

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: 0000-0002-0595-0043(曾高峰)

关键词: 黄精多糖, 组织构建, 去卵巢大鼠, Micro-Ct, 骨形态计量学

Abstract:

BACKGROUND: Previous studies have found that polygonatum sibiricum polysaccharide (PSP) exhibits anti-osteoporosis effect, but its therapeutic effect in ovariectomized osteoporotic rats and the molecular mechanisms are poorly understood.
OBJECTIVE: To investigate the effect of administration of PSP on the bone microstructure, bone mineral density as well as osteoblast- and osteoclast-related gene expression in rats.
METHODS: Twenty-five infertile female Sprague-Dawley rats aged 3 months were randomly allotted into five groups (n=5 per group): sham operation (same volume normal saline), model, zoledronate (0.2 mg/kg•d), high-dose PSP (800 mg/kg•d) and medium-dose PSP         (400 mg/kg•d) groups. All rats were subjected to ovariectomy except sham operation group. The administration was intragastrically given every 2 days beginning at 7 days after modeling and lasted 12 weeks. Then, the rats were sacrificed, and the uterus was weighed. The bilateral tibias were removed, one side for histomorphometric analysis by micro-CT, and the other one for RNA detection by qualified PCR.
RESULTS AND CONCLUSION: Compared with the sham operation group, the rat body mass in the model group was significantly increased and the weight of uterus was significantly decreased (P < 0.05). Compared with the model group, zoledronate and high-dose PSP could significantly alleviate the excessive increase in body mass (P < 0.05). The bone mineral density in the model group was decreased by 63% compared with the sham operation group (P < 0.01), Compared with the model group, after 12-week high-dose PSP and zoledronate administration, the bone mineral density was increased by 44% and 38%, respectively (P < 0.01); the trabecular bone volume fraction and trabecular number rose significantly (P < 0.05), while the trabecular separation decreased significantly (P < 0.05). In vivo, PSP could significantly promote the expression levels of osteoblast-related genes (alkaline phosphatase, RUNX2, Col1a1 and osteocalcin), and significantly inhibit the expression levels of osteoblast-related genes (ACP5 and CTSK) (P < 0.05). These results imply that high-dose PSP can reduce bone loss and decrease of bone mineral density, improve the destruction of bone microstructure, as well as promote osteoblast-related genes but inhibit osteoclast-related gene mRNA expression in the ovariectomized rats.

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: Polygonatum, Polysaccharides, Ovariectomy, Osteoporosis, Tissue Engineering

中图分类号: