华西口腔医学杂志

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小鼠树突状细胞经脂多糖诱导成熟前后超微结构的适应性变化

骆德平 李勇 李代庆 季平 王涛 邱丽华 刘平   

  1. 重庆医科大学口腔医院口腔颌面外科, 重庆400015
  • 收稿日期:2009-06-25 修回日期:2009-06-25 出版日期:2009-06-20 发布日期:2009-06-20
  • 通讯作者: 李勇,Tel:15922609465
  • 作者简介: 骆德平(1981-),男,重庆人,硕士
  • 基金资助:

    重庆市卫生局科研基金资助项目(07-2-178);重庆市自然科学基金资助项目(CSTC,2004BB5117)

Adaptive changes of ultrastructures of dentritic cells during maturation induced by lipopolysaccharide

LUO De-ping, LI Yong, LI Dai-qing, JI Ping, WANG Tao, QIU Li-hua, LIU Ping   

  1. Dept. of Oral and Maxillofacial Surgery, College of Stomatology, Chongqing Medical University, Chongqing 400015, China
  • Received:2009-06-25 Revised:2009-06-25 Online:2009-06-20 Published:2009-06-20
  • Contact: LI Yong,Tel:15922609465

摘要:

目的研究树突状细胞成熟前后细胞超微结构的一系列适应性变化。方法经粒-巨噬细胞集落刺激因子(GM-CSF)、白细胞介素-4(IL-4)诱导小鼠骨髓单个核细胞分化为未成熟树突状细胞,倒置相差显微镜下观察细胞形态,流式细胞仪检测细胞表面标志。再经脂多糖(LPS)诱导48 h成熟,经透射电镜观察诱导成熟前后树突状细胞超微结构并加以比较分析。结果树突状细胞经LPS刺激成熟后,其细胞表面树枝状突起明显减少,细胞内器持续增多,同时细胞核直径增大。结论树突状细胞表面突起的分布状态,可能决定了抗原呈递能力的大小,同时也是细胞功能潜力及状态的一种潜在标尺。

关键词: 树突状细胞, 脂多糖, 超微结构

Abstract:

Objective To investigate the adaptive changes of ultrastructure of the dentritic cells(DC) before and after maturation. Methods The murine bone marrow mononuclear cells were induced into immatured dendritic cells with granulocyte-macrophage colony-stimulating factor(GM-CSF) and interleukin-4(IL-4). The cell morphology was observed under an inverted phase contrast microscope, and the surface markers were detected by flow cytometry. Then the DC was induced to be matured with lipopolysaccharide(LPS) for 48 hours, the ultrastructures of DC was observed before and after maturation under transmission electron microscope and then a comparative analysis was doned. Results The surface processes of matured dentritic cells stimulated by LPS decreased significantly, whereas the organelles and the diameter of nucleolus increased. Conclusion The distribution of surface processes may be associated with the antigen-presenting capacity of DC, and it is also a potential ruler of cell function and status.

Key words: dentritic cell, lipopolysaccharide, ultrastructure