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山东大学学报(医学版) ›› 2010, Vol. 48 ›› Issue (4): 45-.

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5-氮-2′-脱氧胞苷对RPMI8226细胞增殖、凋亡及SOCS-1基因表达的影响

卢菲, 刘传方,马道新,刘彦平,孔海丽,张晶晶   

  1. 山东大学齐鲁医院血液科, 济南 250012
  • 收稿日期:2009-11-07 出版日期:2010-04-16 发布日期:2010-04-16
  • 通讯作者: 刘传方(1967- ),男,教授,主要从事白血病发病机制及骨髓移植的研究。 Email:lcfsy@163.com
  • 作者简介:卢菲(1985- ),女,硕士研究生,主要从事恶性血液病表观遗传学的研究。

Effect of 5-Aza-2′-deoxycytidine on SOCS-1 gene expression, proliferation and apoptosis in RPMI8226 cells

LU Fei, LIU Chuanfang, MA Daoxin, LIU Yanping,KONG Haili, ZHANG Jingjing   

  1. Department of Hematology,  Qilu Hospital of Shandong University, Jinan 250012, China
  • Received:2009-11-07 Online:2010-04-16 Published:2010-04-16

摘要:

目的  研究DNA甲基转移酶抑制剂5-杂氮-2'-脱氧胞苷(5-Aza-CdR)对人多发性骨髓瘤细胞株RPMI8226生物学活性以及SOCS-1基因表达的影响。 方法  不同浓度5-Aza-CdR(0.1、0.5、1.0、2.0、5.0μmol/L)对RPMI8226细胞干预后,采用MTT法检测细胞增殖活性;流式细胞术分析细胞凋亡及细胞周期的改变;Real-time PCR法检测各组细胞SOCS-1 mRNA的表达。结果  5-AzaCdR对RPMI8226细胞的生长抑制有明显的时间和剂量依赖性(P<0.05);流式检测结果显示,0.1、0.5、1.0、2.0、5.0μmol/L 5-Aza-CdR作用于RPMI8226细胞72h后,细胞凋亡率分别为(29.62±2.87)%、(39.98±2.53)%、(49.07±3.51)%、(60.15±4.54)%和(69.88±3.49)%,且呈剂量依赖性(P<0.05);与对照组相比,5-Aza-CdR处理RPMI8226细胞72h后,细胞阻滞于G0/G1期;Real-time PCR结果显示,SOCS1基因在RPMI8226细胞中微弱表达,5-Aza-CdR作用后,SOCS-1 mRNA表达水平呈剂量依赖性逐渐升高(P<0.05)。结论  5-Aza-CdR显著抑制多发性骨髓瘤细胞RPMI8226增殖,可能与诱导SOCS-1 基因去甲基化和SOCS-1再表达有关。

关键词: DNA甲基化;5-杂氮-2′-脱氧胞苷;细胞因子信号传导抑制因子-1; 多发性骨髓瘤

Abstract:

Objective  To investigate the effect of DNA methylation inhibitor 5-Aza-2′-deoxycytidine (5-Aza-CdR) on transcription regulation of SOCS-1 gene and the molecular biological behaviors in RPMI8226 cells. Methods  The RPMI8226 cells were treated with different doses of 5-Aza-CdR,  and MTT was used to detect the proliferation of RPMI8226 cells. The apoptosis and cell cycle were analyzed by flow cytometry.  Real-time PCR was used to examine expression of the SOCS-1 gene.  Results   5-Aza-CdR significantly inhibited  cell growth in dose and time dependent manners(P<0.05).5-Aza-CdR increased the apoptosis rate of RPMI8226 cells as well as  in a dose-dependent manner. The apoptosis rates of RPMI8226 cells treated with 5-Aza-CdR at concentration of 0.1,0.5,,1.0,2.0,5.0μmol/L for 72 hours were (29.62±2.87)%,(39.98±2.53)%,(49.07±3.51)%,(60.15±4.54)and(69.88±3.49)% respectively. After treatment with different concentrations of 5-Aza-CdR for 72h, cells were arrested in G (0)/G (1) phase in contrast to the control group (P<0.05).  Real-time PCR results showed that there were few SOCS-1 genes expressed in RPMI8226 cells after treatmean with 5-Aza-CdR for 72h,  and expression level of SOCS-1 was increased significantly in a concentration-dependent manner(P<0.05). Conclusion  5-Aza-CdR could narkedly inhibit the proliferation of RPMI8226 cells and induce cell apoptosis, which might be related to demethylation and reexpression of the SOCS-1 gene in RPMI8226 cells.

Key words:  DNA methylation; 5-Aza-2′-deoxycytidine; Suppressor of cytokine signaling 1; Multiple myeloma

中图分类号: 

  • R733.3
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