中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (2): 186-190.doi: 10.3969/j.issn.2095-4344.2974

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

补骨脂异黄酮抑制破骨细胞分化缓解小鼠去卵巢骨质疏松

李啸群,徐凯航,纪  方   

  1. 上海长海医院创伤骨科,上海市   200433
  • 收稿日期:2020-03-03 修回日期:2020-03-07 接受日期:2020-04-03 出版日期:2021-01-18 发布日期:2020-11-21
  • 通讯作者: 纪方,博士,主任医师,教授,博士生导师,上海长海医院创伤骨科,上海市 200433
  • 作者简介:李啸群,男,1994年生,山东省日照市人,汉族,海军军医大学在读博士,主要从事骨代谢疾病相关研究。 徐凯航,男,1990年生,山东省烟台市人,汉族,2014年海军军医大学毕业,主治医师,主要从事老年髋部骨折研究。
  • 基金资助:
    国家自然科学基金面上项目(81872171)

Corylin inhibits osteoclastogenesis and attenuates postmenopausal osteoporosis in mice

Li Xiaoqun, Xu Kaihang, Ji Fang   

  1. Department of Traumatic Orthopaedics, Shanghai Changhai Hospital, Shanghai 200433, China
  • Received:2020-03-03 Revised:2020-03-07 Accepted:2020-04-03 Online:2021-01-18 Published:2020-11-21
  • Contact: Ji Fang, MD, Chief physician, Professor, Doctoral supervisor, Department of Traumatic Orthopaedics, Shanghai Changhai Hospital, Shanghai 200433, China
  • About author:Li Xiaoqun, MD candidate, Department of Traumatic Orthopaedics, Shanghai Changhai Hospital, Shanghai 200433, China Xu Kaihang, Attending physician, Department of Traumatic Orthopaedics, Shanghai Changhai Hospital, Shanghai 200433, China
  • Supported by:
     the National Natural Science Foundation of China (General Program), No. 81872171

摘要:

文题释义:
破骨细胞分化:成熟的破骨细胞由骨髓单核细胞分化而来,骨髓细胞在巨噬细胞克隆刺激因子的诱导下形成骨髓单核细胞,在巨噬细胞克隆刺激因子和RANKL的诱导下,骨髓单核细胞逐渐分化,形成成熟破骨细胞,成熟破骨细胞TRAP染色呈阳性,F-actin是破骨细胞行使骨吸收功能的重要结构,帮助破骨细胞在体内行使骨吸收功能。
绝经后骨质疏松:是一种与衰老有关的常见病,主要发生在绝经后妇女,由于雌激素缺乏导致骨量减少及骨组织结构变化,使骨脆性增多,骨折风险显著上升,同时由骨折引起的疼痛、骨骼变形、出现合并症等严重地影响老年人的身体健康和生活质量。

背景:骨代谢平衡由破骨细胞介导的骨吸收作用和成骨细胞介导的骨形成作用共同完成。破骨细胞的过度激活可导致一系列的骨代谢疾病如风湿性关节炎、骨质疏松等。RANKL介导的NF-κB通路激活在破骨细胞分化中发挥重要作用。
目的:探究补骨脂异黄酮在RANKL介导的破骨细胞分化中的作用。
方法:以0,1,2,4,8,16,32,64,128 μmol/L补骨脂异黄酮孵育RAW264.7细胞,CCK-8分析补骨脂异黄酮的细胞毒性;RANKL诱导RAW264.7细胞向破骨细胞分化,分化过程中给予2,5,10 μmol/L补骨脂异黄酮,干预5 d后采用TRAP染色分析破骨细胞数量,F-actin染色分析破骨细胞形态及功能;干预2 d后骨吸收实验分析破骨细胞的骨吸收功能;干预0,15,30,60 min后western blot分析RANKL介导的NF-κB通路的激活情况;然后进行体内实验,卵巢切除小鼠每周接受10 mg/kg补骨脂异黄酮腹腔注射治疗2次,干预6周后取小鼠股骨进行形态学分析。
结果与结论:①在16 μmol/L浓度以下补骨脂异黄酮无细胞毒性;②补骨脂异黄酮可抑制RANKL介导的破骨细胞分化,抑制作用呈浓度依赖性;③补骨脂异黄酮可抑制破骨细胞F-actin形成和破骨细胞的骨吸收功能;④补骨脂异黄酮可抑制RANKL介导的NF-κB通路;⑤补骨脂异黄酮干预可缓解小鼠绝经后骨质疏松后的骨量丢失;⑥结果表明,补骨脂异黄酮通过抑制RANKL介导的NF-κB通路激活,进而调控破骨细胞分化并缓解绝经后骨质疏松。

https://orcid.org/0000-0001-9176-090X (李啸群) 

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: 骨, 补骨脂异黄酮, 破骨细胞, 通路, 骨质疏松, 小鼠, 骨吸收, 骨形成

Abstract: BACKGROUND: The balance of bone homeostasis is mediated by the osteoclast-related bone resorption and osteoblast-related bone formation. Over-activation of osteoclasts results in a series of bone metabolic diseases including rheumatoid arthritis and osteoporosis. The activation of nuclear factor-κB  pathway induced by receptor activator of nuclear factor-κB ligand (RANKL) plays an important role in osteoclastogenesis.
OBJECTIVE: To explore the effect of corylin on RANKL-mediated osteoclastogenesis. 
METHODS: RAW264.7 cells were incubated with 0, 1, 2, 4, 8, 16, 32, 64, 128 μmol/L corylin. The cytotoxicity of corylin was detected by cell counting kit-8 assay. RANKL induced the differentiation of RAW264.7 cells into osteoclasts, during which 2, 5, 10 μmol/L corylin was given. The number of osteoclasts was analyzed by TRAP staining after 5 days of intervention and the morphology and function of osteoclasts were analyzed by F-actin staining. Bone resorption assay was conducted after 2 days of intervention. The activation of nuclear factor-κB pathway was detected by western blot at 0, 15, 30, and 60 minutes of intervention. Then in vivo experiments were carried out, and the ovariectomized mice were intraperitoneally given 10 mg/kg twice a week. After 6 weeks of intervention, mouse femurs were taken for morphological analysis.
RESULTS AND CONCLUSION: There was no cytotoxicity of corylin below the concentration of 16 μmol/L. Corylin inhibited osteoclastogenesis in a dose-dependent manner. Corylin inhibited the formation of F-actin and resorption activity of osteoclasts. Corylin inhibited RANKL-mediated nuclear factor-κB pathway. Corylin treatment reduced the bone loss in postmenopausal osteoporosis mice. Overall, corylin inhibits osteoclastogenesis via blocking nuclear factor-κB pathway and attenuates postmenopausal osteoporosis. 

Key words: bone, corylin, osteoclast, pathway, osteoporosis, mouse, bone resorption, bone formation

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