中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (38): 6123-6128.doi: 10.3969/j.issn.2095-4344.2014.38.010

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

破骨细胞骨吸收中肿瘤坏死因子α可提高空泡型质子泵表达与活性

朱伟平1,林  琳1,刘耿蓉1,李中和1,刘双信2,史  伟2   

  1. 1中山大学附属第五医院肾内科,广东省珠海市  519000;2广东省人民医院肾内科,广东省广州市  518900
  • 收稿日期:2014-08-20 出版日期:2014-09-10 发布日期:2014-09-10
  • 通讯作者: 史伟,博士生导师,主任医师,教授,广东省人民医院肾内科,广东省广州市 518900
  • 作者简介:朱伟平,男,1978年生,广东省珠海市人,汉族,2014年中山大学毕业,博士,主治医师,主要从事终末期肾病和肾性骨病研究。
  • 基金资助:

    2014年广东省医学科研基金资助(A2014259)

Tumor necrosis factor alpha enhances the bone-resorptive capabilities of osteoclasts by improving the expression and activity of vocuolar-type ATPase

Zhu Wei-ping1, Lin Lin1, Liu Geng-rong1, Li Zhong-he1, Liu Shuang-xin2, Shi Wei2   

  1. 1Department of Nephrology, the Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai 519000, Guangdong Province, China; 2Department of Nephrology, Guangdong General Hospital, Guangzhou 518900, Guangdong Province, China
  • Received:2014-08-20 Online:2014-09-10 Published:2014-09-10
  • Contact: Shi Wei, Doctoral supervisor, Chief physician, Professor, Department of Nephrology, Guangdong General Hospital, Guangzhou 518900, Guangdong Province, China
  • About author:Zhu Wei-ping, M.D., Attending physician, Department of Nephrology, the Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai 519000, Guangdong Province, China
  • Supported by:

    the Medical Research Fund of Guangdong Province in 2014, No. A2014259

摘要:

背景:空泡型的ATP酶(V-ATPase)在破骨细胞的骨吸收功能中起重要作用,肿瘤坏死因子α对破骨细胞中的V-ATPase表达与活性的影响尚不明确。
目的:通过V-ATPase的表达与酶的活性变化,探讨肿瘤坏死因子α促进破骨细胞骨吸收功能的机制。
方法:体外诱导培养破骨细胞,分别给予不同质量浓度的肿瘤坏死因子α干预(5,10,30 μg/L)。采用荧光定量PCR及Western Blot检测肿瘤坏死因子α对破骨细胞V-ATPase 表达的影响;根据吸光度值计算出V-ATPase的相对活性;倒置显微镜下观察骨吸收陷窝形成情况,采用Image J软件分析骨吸收面积。
结果与结论:破骨细胞经过48 h的肿瘤坏死因子α干预以后,V-ATPase的表达与活性均有显著的增加,并且提高肿瘤坏死因子α的干预浓度均可增强此效应。破骨细胞经肿瘤坏死因子α干预后,培养板的骨吸收面积明显增加,这种作用随着肿瘤坏死因子α干预浓度的增加而增强。由此推测肿瘤坏死因子α作为一个重要的炎症递质参与病理性骨质吸收的过程,除促进破骨细胞形成以外,其可能的机制是肿瘤坏死因子α通过增加V-ATPase的表达,并提高V-ATPase活性,从而增强破骨细胞的骨质吸收活动。



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


全文链接:

关键词: 组织构建, 骨组织工程, 空泡型质子泵, 肿瘤坏死因子, 破骨细胞, 细胞培养, 骨髓单核细胞

Abstract:

BACKGROUND: Vocuolar-type ATPase (V-ATPase) is highly expressed in osteoclasts and especially plays an important role in osteoclastic bone resorption. Tumor necrosis factor-α is a potent stimulator of bone resorption. However, the effect of tumor necrosis factor-α on expression and activity of V-ATPase is still not clear.
OBJECTIVE: To investigate the mechanism of tumor necrosis factor-α to promote osteoclastic bone resorption by observing expression and activity of V-ATPase.
METHODS: Osteoclasts cultured in vitro were intervened by different concentrations of tumor necrosis factor-α (5, 10, 30 μg/L) in order to observe the changes in expression and enzyme activity of V-ATPase and its effects on bone resorption of osteoclasts. Under an inverted microscope, we observed the formation of resorption lacunas, and bone resorption area was analyzed using Image J software.
RESULTS AND CONCLUSION: The expression and activity of V-ATPase increased significantly after 48 hours of tumor necrosis factor-α intervention and the increase of tumor necrosis factor-α concentration might enhance this effect. In addition, osteoclastic bone resorption was promoted after intervention with tumor necrosis factor-α. The bone-resorbing capabilities of osteoclasts increased in parallel with the concentration of tumor necrosis 
factor-α.The results suggested that tumor necrosis factor-α, as a significant inflammatory mediator involved in the pathological process of bone resorption, not only promotes formation of osteoclasts but also enhances bone-resorbing capabilities of osteoclasts by increasing V-ATPase expression and activity.



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


全文链接:

Key words: tumor necrosis factor-alpha, osteoclasts, adenosine triphosphatases

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