癌变·畸变·突变 ›› 2010, Vol. 22 ›› Issue (1): 6-0009.doi: 10.3969/j.issn.1004-616x.2010.01.002

• 论著 • 上一篇    下一篇

BCR/ABL基因对PTEN介导的信号通路在K562细胞增殖和凋亡中的影响

梁文同1;成志勇1; 牛志云2;刘慧光3;颜晓燕1;于琳艳1   

  1. 1. 保定市第一医院血液内科,河北 保定 071000; 2. 河北医科大学第二医院血液内科,河北 石家庄 050000; 3. 高阳县医院内科 河北 高阳 071500
  • 收稿日期:2009-07-03 修回日期:2009-11-20 出版日期:2010-01-30 发布日期:2010-01-30
  • 通讯作者: 梁文同

Effects of BCR/ABL fusion gene on PTEN signaling pathway in proliferation and apoptosis of K562 cells

LIANG Wen-tong1;CHENG Zhi-yong1;NIU Zhi-yun2;LIU Hui-guang3;YAN Xiao-yan1;YU Lin-yan1   

  1. 1. Department of Hematology, the First Hospital of Baoding, Baoding 071000,Hebei; 2.Department of Hematology,the Second Hospital of Hebei Medical University, Shijiazhuang 050000,Hebei; 3. Department of Internal Medicine, Gaoyang Hospital, Gaoyang 071500, Hebei, China
  • Received:2009-07-03 Revised:2009-11-20 Online:2010-01-30 Published:2010-01-30
  • Contact: LIANG Wen-tong

摘要: 目的: 探讨BCR/ABL融合基因对抑癌基因PTEN介导的信号传导通路在K562细胞增殖和凋亡中的影响。 方法: 用不同浓度的格列卫(0.5、1、2、5、10 μg/ml)干预K562细胞不同时间,观察其对细胞增殖的影响。用1 μg/ml浓度的格列卫干预K562细胞不同时间(12、24、36、48、72 h)后,通过荧光定量PCR检测细胞BCR/ABL、PTEN、mTOR mRNA水平的变化,并分析它们之间的相互关系。Western blotting检测细胞Akt和p-Akt水平,分析BCR/ABL融合基因对PTEN mRNA表达的影响。 结果: 1 μg/ml格列卫作用K562细胞后随着BCR/ABL融合基因表达减低,PTEN mRNA表达上调,mTOR mRNA表达下调,p-Akt表达下调。48 h后随着BCR/ABL融合基因的抑制减弱,PTEN mRNA表达进而减低,而mTOR mRNA表达升高,p-Akt持续降低。BCR/ABL mRNA表达与PTEN mRNA表达呈负相关(r=-0.881, P<0.05),与mTOR mRNA及p-Akt表达呈正相关(依次为r=0.961, r=0.879, P均<0.05)。 结论: BCR/ABL融合基因可以通过抑制PTEN基因表达,调控PI3K/Akt、mTOR信号传导通路,参与细胞增殖、凋亡及细胞周期调控等生物学特性。

关键词: BCR/ABL融合基因, PTEN, mTOR, Akt

Abstract: OBJECTIVE: To investigate the regulatory mechanism of oncogene BCR/ABL fusion gene on PTEN signaling pathway in proliferation and apoptosis of K562 cells in vitro. METHODS: To detect the mRNA levels of BCR/ABL, PTEN and mTOR in K562 cells treated with different concentrations of Imatinib by real-time fluorescent relative- quantification reverse transcriptional PCR (FQ-PCR) and the protein levels of Akt, p-Akt by Western blotting technique. RESULTS: The expression level of PTEN mRNA was up-regulated and the mTOR mRNA was down-regulated with the reduction of BCR/ABL fusion gene in the initial 36 h after 1 μg/ml imatinib inhibiting K562 cells. Then the PTEN mRNA decreased and the mTOR mRNA expression restored, but the p-Akt was continuously down-regulated with the restoration of BCR/ABL fusion gene 48 h later. BCR/ABL and PTEN mRNA showed a positive correlation; whilst BCR/ABL had a negative correlation with mTOR mRNA and p-Akt protein. CONCLUSION: BCR/ABL fusion gene could regulate p-Akt, mTOR pathway by inhibiting PTEN expression in K562 cells and affected cell proliferation, apoptosis and cell cycle.

Key words: BCR/ABL fusion gene, PTEN, mTOR, Akt

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