J4

• 基础研究 • 上一篇    下一篇

表皮生长因子受体的敲除对小鼠骨密度以及成骨细胞募集的影响

王 珂1, 李然伟2,刘永红3,赵燕颖4,杨世杰5   

  1. 1.吉林大学第二医院呼吸内科, 吉林 长春 130041; 2.吉林大学第二医院泌尿外科, 吉林 长春 130041; 3.吉林省肿瘤医院, 吉林 长春 130012; 4.吉林大学基础医学院生理学教研室, 吉林 长春 130021; 5.吉林大学基础
  • 收稿日期:2007-09-05 修回日期:1900-01-01 出版日期:2008-05-28 发布日期:2008-05-28
  • 通讯作者: 赵燕颖

Effect of epidermal growth factor receptor deficiency on trabecular bone formation and recruitment of osteoblasts in mice

WANG Ke1,LI Ran-wei2,LIU Yong-hong3, ZHAO Yan-ying4, YANG Shi-jie5   

  1. 1. Department of Respiratory Medicine, Second Hospital, Jilin University, Changchun 130041, China;  2.Department of Urinary Surgery, Second Hospital, Jilin University, Changchun 130041, China:  3.Tumor Hospital of Jilin Province, Changchun 130012,China; 4.Department of Physiology,School of basic Medical Sciences, Jilin University,Changchun 130021,China;5.Department of Pharmacology, School of basic Medical Sciences , Jilin University, Changchun 130021, China
  • Received:2007-09-05 Revised:1900-01-01 Online:2008-05-28 Published:2008-05-28
  • Contact: ZHAO Yan-ying

摘要: 目的:探讨表皮生长因子受体(EGFR)信号转导系统在小鼠骨胳发育中的作用。 方法:以EGFR敲除鼠(EGFR-/-)为实验动物模型,通过马森三色染色(Masson Trichrome)、原位杂交技术,观察其子1代胚胎鼠及新生鼠四肢长骨发育过程中松质骨的形成及成骨细胞募集的变化。 结果:形态学观察分析, EGFR-/-松质骨的形成较正常野生鼠(EGFR+/+)延迟,骨小梁较正常鼠减少;在胚胎发育第16.5天 (E16.5), 其成骨细胞向中心生长板的募集速度较EGFR+/+亦延迟; 形态学观察EGFR-/-和EGFR+/+核心结合因子A (Cbfa)、降钙素 (OC)及I 型胶原(Col I)在表达数量上有明显不同。结论:EGFR信号转导系统在在小鼠松质骨的形成过程中起着重要作用,其机制可能与调节成骨细胞向中心生长板的募集有关。

关键词: 表皮生长因子, 骨发育, 松质骨 , 成骨细胞

Abstract: Abstract:Objective To determine the role of epidermal growth factor receptor (EGFR) signaling in bone development in mice.Methods Long bone from EGFR wild type (EGFR+/+) and knockout mice (EGFR-/-) were collected and analyzed by Trichrome Masson staining, in situ hybridization was used to observe trabecular bone formation and recruitment of osteoblasts.Results EGFR deficiency can cause delayed trabecular bone formation in EGFR-/- mice and delayed osteoblast recruitment compared with EGFR+/+ mice.There were different expressions of core binding factor A (Cbfa), osteocalcin (OC) and collagen I (Col I) between EGFR+/+ and EGFR-/-.Conclusion EGFR signaling play an important role in trabecular bone formation, the partial mechanisms for which might be related to the regulation of osteoblast recruitment.

Key words: epidermal growth factor, bone development, brabecular bone, osteoblasts

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  • Q7