华西口腔医学杂志

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脱落酸对Tca8113细胞诱导分化影响的体外实验

赵洪伟1, 2, 李龙江2, 潘剑2, 韩波2, 温玉明2   

  1. 1.口腔生物医学工程教育部重点实验室, 四川大学; 2.四川大学华西口腔医学院口腔颌面外科学教研室, 四川成都610041
  • 收稿日期:2007-10-25 修回日期:2007-10-25 出版日期:2007-10-20 发布日期:2007-10-20
  • 通讯作者: 李龙江,Tel:028- 85501440
  • 作者简介:赵洪伟(1973-),男,四川人,讲师,博士
  • 基金资助:

    国家自然科学基金资助项目(30471903)

Effect on induction of differ entiation of Tca8113 cells affected by abscisic acid in vitro

ZHAO Hong- wei1,2, LI Long- jiang2, PAN Jian2, HAN Bo2, WEN Yu- ming2.   

  1. 1. Key. Laboratory of Oral Biomedical Engineering of Ministry of Education, Sichuan University, Chengdu 610041, China; 2. Dept. of Oral and Maxillofacial Surgery, West China College of Stomatology, Sichuan University, Chengdu 610041, China
  • Received:2007-10-25 Revised:2007-10-25 Online:2007-10-20 Published:2007-10-20
  • Contact: LI Long- jiang,Tel:028- 85501440

摘要:

目的探讨植物激素中脱落酸(ABA)对人舌鳞癌Tca8113细胞的诱导分化作用。方法采用脱落酸处理Tca8113细胞,观察Tca8113细胞生长和形态变化,SABC免疫组化检测细胞表面分化标志物Involucrin、RARβ及原位杂交检测Caspase- 3 mRNA的表达变化,并比较细胞表面分化标志物的表达水平与Caspase- 3 mRNA表达两者间相关性。结果Tca8113细胞经ABA作用后,细胞生长抑制明显(P<0.05),Tca8113细胞表现出向正常细胞转化的趋势。脱落酸作用24 h时细胞Involucrin、RARβ蛋白以及Caspase- 3 mRNA表达均增高,不同浓度实验组中其表达存在显著性差异(P<0.05)。1×10-2mmol/L ABA作用12 h和24 h时,Involucrin、RARβ和Caspase- 3 mRNA表达之间呈正相关(P<0.05)。结论脱落酸可通过提高Involucrin、RARβ表达水平,激活Caspase- 3 mRNA的表达,从而促进肿瘤细胞分化及凋亡。

关键词: 鳞状细胞癌, 脱落酸, 诱导分化

Abstract:

Objective To approach the effects on induction of differentiation of Tca8113 cells affected by abscisic acid. Methods The changes of surface differentiation markers, cell configuration, restrain of cell growth and the expression of Caspase - 3 mRNA were examined by using inverted- phase contrast microscope, immunohistochemistry (IHC)and in situ hybridization in vitro. The dependablity between the surface differentiation markers and Caspase- 3 mRNA was analysed. Results The restraint of cell growth in ABA groups was higher than that of the control group (P<0.05). There was a trend that the tumor cell had transformed the normal cell. Furthermore, the time - dosage dependent relationship existed in the inhibition rate of tumor cells. The results showed that the expressions of Involucrin protein, retinoic acid receptor β(RARβ) and Caspase- 3 mRNA in experimental group had been higher than that of control group. There was a significance between the different concentration experimental groups at 24 h (P<0.05). Moreover, the positive correlation existed among the Involucrin, RARβ and Caspase- 3 mRNA at the time of 12 hour and 24 hour(P<0.05). Conclusion The possible mechanism is that abscisic acid acted on the tumor cell and raised the level of RARβ gene through combining the correlative receptors so that increased the expression of Involucrin protein and promoted the activity of Caspase- 3 and resulted in apoptosis of tumor cell.

Key words: squamous cell carcinoma, abscisic acid, induction of differentiation