实验动物科学 ›› 2013, Vol. 30 ›› Issue (06): 26-30.

• 研究 论著 • 上一篇    下一篇

15-KETE 对大鼠肺动脉平滑肌细胞上ERK1 /2 活性的影响

  

  1. (1. 哈尔滨医科大学第二临床医学院实验动物中心,哈尔滨150086)
    (2. 哈尔滨医科大学第二临床医学院药学部,哈尔滨150086)
    (3. 哈尔滨医科大学公共卫生学院职业卫生与职业医学教研室,哈尔滨150086)
  • 出版日期:2013-12-31 发布日期:2014-05-15
  • 基金资助:

    黑龙江省应用技术研究与开发计划项目(No. PC13S011)

Effect of 15-KETE on ERK1 /2 Activity in Rat Pulmonary Artery Smooth Muscle Cells

  • Online:2013-12-31 Published:2014-05-15

摘要: 摘要:目的从细胞分子水平上研究15-酮基二十碳四烯酸(15-ketoeicosatetretraenoic acid,15-KETE)对大鼠肺动脉 平滑肌细胞上ERK1 /2 的活性的影响。方法通过酶法分离、培养SD 大鼠肺动脉平滑肌细胞( pulmonary arterial smooth cells,PASMCs),使用Western blot 技术观察15-KETE 对大鼠PASMCs 上ERK1 /2 活性的影响。结果1) 10 - 6mol /L 15-KETE 作用从0. 5 h 到24 h 与对照组(未加15-KETE)比较,对ERK1 /2 总量没有明显的影响。2)与 对照组比较,15-KETE 处理0. 5、1. 0、2. 0、4. 0、8. 0 h 明显增强p- ERK1 /2( P < 0. 05)。3)与对照组比较,10 - 8、10 - 7和10 - 6 mol /L 15-KETE 明显增强p-ERK1 /2(P < 0. 05),随15-KETE 浓度增大,p-ERK1 /2 增多。4)与15-KETE 作 用比较,ERK1 /2 抑制剂PD98059 20 μmol /L、50 μmol /L 和U0126 0. 1 μmol /L、1 μmol /L 均能抑制15-KETE 对 ERK1 /2 的活化(P < 0. 05),并且随着抑制剂浓度增大,抑制作用加强。结论15-KETE 对大鼠肺动脉血管平滑肌 细胞上的ERK1 /2 表达没有明显的影响,但能激活肺动脉血管平滑肌细胞ERK1 /2,使其磷酸化,并呈时间- 剂量 依赖关系。ERK1 /2 通路的特异性抑制剂PD98059、U0126 能抑制15-KETE 对ERK1 /2 的磷酸化。

关键词: 15-KETE, 细胞外信号调节激酶, 肺动脉血管平滑肌细胞

Abstract: Abstract:Objective To investigate the effect of 15-ketoeicosatetretraenoic acid(15-KETE) on ERK1 /2 activity in rat pulmonary artery smooth muscle cells ( PASMCs) . Method PASMCs of SD rats were collected by type I collagen plus elastase digestion,and cultured in control and defined media. The effect of 15-KETE on ERK1 /2 activity in rat pulmonary artery smooth muscle cells was investigated by Western blot. Result 15-KETE had no effect on ERK1 /2’s expression and activity at 10 - 6 mol /L from 0. 5 h to 24 h. But it could increase the expression of p-ERK1 /2 after 0. 5,1,2,4 and 8 h incubation ( P < 0. 05 ) ; 15-KETE,at concentration of 10 - 8— 10 - 6 mol /L,could significantly increase the expression of p- ERK1 /2 ( P < 0. 05) ; PD98059 and U0126,two specific inhibitors of ERK1 /2,could significantly inhibit the effect of 15-KETE ( at concentration of 10 - 6 mol /L) on ERK1 /2 activity ( P < 0. 05 ),when PD98059 was added at 20 and 50 μmol /L and U0126 at 0. 1 and 1 μmol /L respectively. Conclusion 15-KETE has no effect on ERK1 /2 expression,but can activate ERK1 /2 in PASMCs and induce its phosphorylation in a time- and concentration-dependent manner. PD98059 and U0126 can inhibit the effect of 15 - HETE on ERK1 /2 phosphorylation.

Key words: 15-KETE, extracellular signal-regulated kinase (ERK), pulmonary artery smooth muscle cells

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