中国口腔颌面外科杂志 ›› 2015, Vol. 13 ›› Issue (2): 105-109.

• 基础研究 • 上一篇    下一篇

辐照对MC3T3-E1细胞TGF-β1和Smads基因及蛋白表达的影响

刘广龙1, 刘忠龙1, 付水霆1, 胡海生2, 何悦1   

  1. 1.上海交通大学医学院附属第九人民医院·口腔医学院 口腔颌面-头颈肿瘤科;
    2.口腔放疗科, 上海市口腔医学重点实验室,上海 200011
  • 收稿日期:2014-05-26 修回日期:2014-09-11 出版日期:2015-03-20 发布日期:2015-04-23
  • 通讯作者: 何悦,Tel:021-23271699-5656,E-mail:william5218@126.com
  • 作者简介:刘广龙(1987-),男,硕士研究生,E-mail:lgl515588968@126.com
  • 基金资助:
    国家自然科学基金(81271112)

Effects of radiation on the expression of TGF-β1 and Smads in MC3T3 E1 cells

LIU Guang-long1, LIU Zhong-long1, FU Shui-ting1, HU Hai-sheng2, HE Yue1   

  1. 1.Department of Oromaxillofacial Head and Neck Oncology, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine;
    2. Department of Radiotherapy, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology. Shanghai 200011, China
  • Received:2014-05-26 Revised:2014-09-11 Online:2015-03-20 Published:2015-04-23
  • Supported by:
    Supported by National Natural Science Foundation of China (81271112)

摘要: 目的: 探讨放射线对成骨细胞系MC3T3-E1细胞增殖及TGF-β1和Smad3/P-Smad3表达的影响。方法: 以小鼠胚胎成骨细胞系MC3T3-E1为研究对象,4MV直线加速器为放射源,给予单一剂量8Gy照射。照射后以CCK-8检测成骨细胞增殖情况,通过荧光定量PCR和Western免疫印迹分别检测TGF-β1、Smad3基因和蛋白的表达,并分别用2-ΔΔct法及光密度分析法分析基因及蛋白的表达水平。采用SPSS 13.0 软件包对数据进行统计学分析。结果: 单次8Gy剂量照射的细胞组与对照组相比,生长速度明显减慢;Smad3及TGF-β1基因在照射后0.5 h,1 h组与对照组无显著差异(P>0.05),照射后1.5 h组Smad3及TGF-β1基因表达量与对照组存在显著差异(P<0.05);P-Smad3、TGF-β1蛋白表达在第1天明显上调;第3天、第5天照射组与对照组差异逐渐减小。8Gy照射后第1天,P-Smad3蛋白表达量最高,TGF-β1蛋白表达量第3天最高。结论: 8Gy照射剂量可抑制MC3T3-E1细胞增殖,短时间内上调TGF-β1和Smad3/P-Smad3在基因及蛋白水平的表达。

关键词: 放射, MC3T3-E1, TGF-β, 1, Smad3, P-Smad3

Abstract: PURPOSE: To investigate the effects of radiation on cell proliferation and expression of TGF-β1 and Smad3/P-Smad3 in MC3T3-E1 cells. METHODS: The mouse embryos ossification cell line MC3T3-E1 was used, which was given a single dose of 8 Gy by 4MV linear accelerator. Cell proliferation after irradiation was detected by CCK-8, real-time PCR and Western blot, respectively. Gene and protein expression of TGF-β1, Smad3 was detected by 2-ΔΔct and densitometric analysis were used to analyze the expression level of genes and proteins, respectively. SPSS 13.0 software package was used for statistical analysis. RESULTS: After irradiation of 8 Gy, cell growth slowed significantly compared with the control group; the gene expression of Smad3 and TGF-β1 had no significant change after irradiation for 0.5 h and 1 h (P>0.05), until 1.5 h (P<0.05); the protein expression of P-Smad3 and TGF-β1 raised obviously on the first day. The difference between exposure group and control group gradually decreased on day 3 and 5. The protein expression of TGF-β1 and P-Smad3 reached peak on the first and third day, respectively. CONCLUSIONS: 8 Gy dose irradiation inhibits cell proliferation and increases the expression of TGF-β1 and Smad3/P-Smad3 on gene and protein level.

Key words: Radiation, MC3T3-E1, TGF-β1, Smad3, P-Smad3

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