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FITC标记重组灵芝免疫调节蛋白(rLz-8)在NB4细胞中的动态定位

梁重阳1, 徐蔚青2, 曹焱鑫2, 刘立侠3, 张淑芹1, 刘志屹1, 李泓睿1, 李柏志1, 孙非1
  

    1. 吉林大学再生医学科学研究所, 长春 130021;
    2. 吉林大学超分子结构与材料国家重点实验室, 长春 130012;
    3. 东北师范大学生命科学学院, 长春 130024
  • 收稿日期:2008-07-21 修回日期:1900-01-01 出版日期:2009-03-10 发布日期:2009-03-10
  • 通讯作者: 孙非

Dynamic Observation of Cellular Localization of Fluorescein Isothiocyanate Labeled Recombinant Ganoderma Lucidum Immunoregulatory Protein(rLz-8) in NB4 APL Cell

LIANG Chong-Yang1, XU Wei-Qing2, CAO Yan-Xin2, LIU Li-Xia3, ZHANG Shu-Qin1, LIU Zhi-Yi1, LI Hong-Rui1, LI Bai-Zhi1, SUN Fei1*
  

    1. Institute of Frontier Medical Science, Jilin University, Changchun 130021, China;
    2. State Key Lab for Supramolecular Structure and Materials, Jilin University, Changchun 130012, China;
    3. School of Life Sciences, Northeast Normal University, Changchun 130024, China
  • Received:2008-07-21 Revised:1900-01-01 Online:2009-03-10 Published:2009-03-10
  • Contact: SUN Fei

摘要: 实验发现, 重组灵芝免疫调节蛋白(rLz-8)可直接杀伤人急性早幼粒细胞白血病细胞株NB4. 利用异硫氰酸荧光素(FITC)标记rLz-8, 其相关的活性实验结果和晶体结构分析都表明, FITC没有影响rLz-8已知生物学功能. 通过激光共聚焦显微镜观察FITC-rLz-8在NB4细胞内的动态过程发现, FITC-rLz-8可识别细胞膜上的受体, 并可进入细胞质, 并最终富集在细胞核区域内. Annexin V-FITC双染检测结果显示, rLz-8对NB4细胞杀伤作用的可能机制是对NB4细胞凋亡的诱导作用, 在一定浓度范围内, 剂量与凋亡诱导率成正相关. 因此rLz-8能够诱导肿瘤细胞NB4发生凋亡的亚细胞学机制可定位在细胞核上.

关键词: 异硫氰酸荧光素(FITC), 亚细胞定位, 细胞核, 凋亡, NB4细胞

Abstract: NB4 APL cell was induced apoptosis by Recombinant Ganoderma lucidum immunoregulatory protein(rLz-8) for the first time in this study. The dynamic cellular localization of FITC-rLz-8 was observed by laser scanning confocal microscope LSCM: identifying the receptors of cell membrane, entering into cell, gathering on nucleus finally. Annexin V-FITC kit was used for measuring apoptosis of NB4 by rLz-8. Results show that the effects of the dose group(0.5 μg/mL) is close to the one of positive control(As2O3). All data show that apoptosis inducing activity of rLz-8 in HL60 cells and changes of cell morphology and Ca2+ level in cytosol are probably interrelate with rLz-8's subcellular localization.

Key words: Fluorescein isothiocyanate(FITC), Subcellular localization, Nucleus, Apoptosis, NB4 cell

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