含十字形结构域蛋白-3对肺癌细胞增殖与迁徙的影响研究

为了解含十字形结构域蛋白-3(JMJD3)对肺癌细胞A549增殖与迁徙的影响,通过JMJD3表达质粒转染A549培养48h后,EDU染色及流式细胞术检测细胞增殖与凋亡,划痕实验检测细胞迁徙,RT-PCR检测p21mR-NA表达。结果显示,JMJD3转染后EDU阳性比例明显高于对照(JMJD3:40.75%±2.07%,对照:20.97%±1.5%,P<0.001);G1期细胞比例降低(JMJD3:47.80%±1.85%,对照:54.60%±0.95%,P=0.005)。转染JM-JD3后p21mRNA表达量为35.89%±3.71%,而对照为91.78%±3.74%,两组p21表达变化明显(P<0.001)。转染JMJD3质粒24h和48h后细胞迁徙距离分别为(0.47±0.27)cm和(0.96±0.40)cm,对照为(0.57±0.22)cm和(1.08±0.33)cm,两组无显著性差异(P>0.05)。JMJD3可促进A549细胞增殖,降低G1期细胞比例并下调p21mRNA表达,但对A549迁徙无明显影响。

Effect of Jumonji domain-containing protein-3 on the proliferation and migration of lung cancer cell line

For investigating the effect of Jumonji domain-containing protein-3 (JMJD3) on the behavior of lung cancer cell line, A549 proliferation was measured with EDU staining and flow cytometer after JMJD3 expression plasmid and pcDNA3. 1 transfection at 48h. The migration ability of A549 was tested at the same time. The expression of p21 mRNA was measured with RT-PCR. The results showed that JMJD3 transfection increased the EDU positive cells ratio (JMJD3: 40.75% +/- 2.07%, control: 20.97% +/- 1.5%, P < 0.001). G1 phase cell ration also increased after JMJD3 transfection (JMJD3:47. 80% +/- 1.85%, control: 54.60% +/- 0.95%, P = 0.005). The mRNA expression of p21 decreased in JMJD3 group (JMJD3: 35. 89% +/- 3.71%, control: 91.78% +/- 3.74%, P < 0.001). The distances of migration were (0.47 +/- 0.27) cm and (0.96 +/- 0.40) cm after 24h and 48h with JMJD3 tranfection, compared to (0.57 +/- 0.22)cm and (1.08 +/- 0.33)cm in control, respectively (P > 0.05). JMJD3 promoted the proliferation of A549 and decreased the G1 cell numbers, decreased the p21 mRNA, but had no effect on A549 migration.