中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (29): 4620-4625.doi: 10.3969/j.issn.2095-4344.2777

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

骨碎补影响破骨细胞分化的程度与含药血清浓度有关

许金松,邓  娜,张  潇   

  1. 濮阳市安阳地区医院骨一科,河南省安阳市  455000
  • 收稿日期:2019-11-11 修回日期:2019-11-15 接受日期:2019-12-16 出版日期:2020-10-18 发布日期:2020-09-12
  • 作者简介:许金松,男,1978年生,河南省鲁山县人,汉族,2002年新乡医学院毕业,副主任医师,主要从事关节、脊柱的研究。
  • 基金资助:
    2018年度河南省科技攻关目录(182102310463)

Effect of Rhizoma Drynariae on osteoclast differentiation is related to the concentration of drug-containing serum

Xu Jinsong, Deng Na, Zhang Xiao   

  1. Department of Orthopedics, Anyang District Hospital of Puyang City, Anyang 455000, Henan Province, China
  • Received:2019-11-11 Revised:2019-11-15 Accepted:2019-12-16 Online:2020-10-18 Published:2020-09-12
  • About author:Xu Jinsong, Associate chief physician, Department of Orthopedics, Anyang District Hospital of Puyang City, Anyang 455000, Henan Province, China
  • Supported by:
    the 2018 Science and Technology Research Catalog of Henan Province, No. 182102310463

摘要:

文题释义:

活化T细胞核因子1属于NFAT家族重要成员之一,是破骨细胞分化形成中的重要转录因子,活化T细胞核因子1激活后可由细胞质转位至细胞核,在此过程中c-Fos/AP1信号通路起关键作用。CTSK、抗酒石酸酸性磷酸酶是破骨细胞特异性蛋白,活化T细胞核因子1活化的同时,可将CTSK、抗酒石酸酸性磷酸酶转录出细胞核,促进破骨细胞分化。

中药含药血清:是指动物灌胃给予中药或单体制剂,经吸收进入血液循环,在一定时间内采取血液,分离所得血清,必定还有一定量的该药物成分,可反映机体真实血药浓度;将此血清进行体外细胞培养体系,可观察体外药理作用。

背景:已有报道骨碎补总黄酮有防治骨质疏松症的效果,但其作用机制多集中于对成骨细胞的作用,而对破骨细胞分化的影响研究较少。

目的探讨骨碎补通过活化T细胞核因子1信号通路对破骨细胞分化的影响。

方法40SD大鼠随机分为4组,分别以011.634.8104.4 g/kg的骨碎补总黄酮灌胃,获得阴性对照血清及低、中、高浓度含药血清另取5周龄大鼠分离获取骨髓巨噬细胞,采用CCK-8法检测不同含药血清对巨噬细胞活性的影响;取巨噬细胞分为低、中、高浓度组、阴性对照组、空白组,每孔5个复孔,分别加入低、中、高浓度含药血清、阴性对照血清培养液、正常培养液;所有培养液均用20 μg/L巨噬细胞集落刺激因子、100 μg/L核因子κB受体活化因子配体进行破骨细胞诱导分化。诱导分化7 d,抗酒石酸酸性磷酸酶染色检测破骨细胞数、融合指数,实时荧光定量PCRWestern blot检测各组细胞c-FosFra-1Fra-2、活化T细胞核因子1、组织蛋白酶KmRNA和蛋白表达;诱导分化14 d,骨片吸收陷窝试验检测破骨细胞骨吸收陷窝数、陷窝面积占比实验方案经濮阳市安阳地区医院动物实验伦理委员会批准,批准号为PYSAYDQ-2019096

结果与结论①不同浓度骨碎补含药血清对巨噬细胞活性影响无明显变化;②诱导分化前巨噬细胞形态规则,诱导分化后行抗酒石酸酸性磷酸酶染色证实为破骨细胞;③与空白组、阴性对照组比较,低、中、高浓度组破骨细胞数、融合指数、骨吸收陷窝数、陷窝面积占比、c-FosFra-1Fra-2、活化T细胞核因子1、组织蛋白酶K mRNA和蛋白相对表达量均明显降低(P < 0.05),且上述指标均随骨碎补含药血清浓度升高呈降低趋势:低浓度组>中浓度组>高浓度组,各浓度组间比较差异均有显著性意义(P < 0.05);④结果说明,骨碎补可能通过活化T细胞核因子1信号通路抑制大鼠巨噬细胞向破骨细胞的分化,且分化抑制程度与骨碎补含药血清浓度有关。

ORCID: 0000-0003-3948-4631(许金松)

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: 骨碎补, 活化T细胞核因子1, 破骨细胞, 分化, 抑制

Abstract:

BACKGROUND: Total flavonoids of Rhizoma Drynariae can be used to prevent and treat osteoporosis, but its mechanism of action is mostly focused on osteoblasts rather than osteoclast differentiation.

OBJECTIVE: To investigate the effect of Rhizoma Drynariae on osteoclast differentiation through T-cell nuclear factor 1 (NFATc1) signaling pathway.

METHODS: Forty Sprague-Dawley rats were randomly divided into four groups. Total flavonoids of Rhizoma Drynariae were intragastrically administered at 0, 11.6, 34.8 and 104.4 g/kg, respectively. Control serum and low-, middle-, high-concentration drug-containing sera were obtained. Bone marrow macrophages were isolated from 5-week-old rats and the effects of different drug-containing sera on macrophage activity were detected by cell counting kit-8 method. The macrophages were divided into low-, middle- and high-concentration groups, negative control group and blank group, with 5 multiple holes in each well. The low, middle and high concentration of drug-containing serum, negative control serum culture medium and normal culture medium were added respectively. All culture media were used to induce osteoclast differentiation with 20 μg/L macrophage colony-stimulating factor and 100 μg/L receptor activator of nuclear factor kappa B ligand. The number of osteoclasts and fusion index were detected by tartrate-resistant acid phosphatase staining 7 days after induction of differentiation. The expressions of c-Fos, Fra-1, Fra-2, NFATc1 and cathepsin K were detected by real-time fluorescence quantitative PCR and western blot at 7 days after differentiation. The number of bone resorption lacunae and the proportion of lacunae area in osteoclasts after 14 days of differentiation were detected by bone fragment absorption lacunae test. The study protocol was approved by the Animal Experiment Ethics Committee of Anyang District Hospital of Puyang City with approval No. PYSAYDQ-2019096.

RESULTS AND CONCLUSION: Cell counting kit-8 results showed that there was no significant change in macrophage activity after intervention with different concentration of sera containing Rhizoma Drynariae. The morphology of macrophages was regular before differentiation. After differentiation, osteoclasts were identified by tartrate-resistant acid phosphatase staining. Compared with the blank group and negative control group, the number of osteoclasts, fusion index, number of bone resorption lacunae and proportion of lacunae area and the relative expressions of c-Fos, Fra-1, Fra-2, NFATc1, cathepsin K mRNA and protein in the low-, middle- and high-concentration groups decreased significantly (P < 0.05). The above indicators showed a decreasing trend with the increase of serum concentration of Rhizoma Drynariae: low-concentration group > middle-concentration group > high-concentration group, and there were significant differences between different concentration groups (P < 0.05). In conclusion, Rhizoma Drynariae may inhibit the differentiation of rat macrophages into osteoclasts through NFATc1 signaling pathway, and the degree of differentiation inhibition is related to the serum concentration of Rhizoma Drynariae.

Key words: Rhizoma Drynariae, nuclear factor-activated T cell 1, osteoclast, differentiation, inhibition

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