Cripto-1 siRNA联合5-FU对大肠癌细胞增殖和迁移的影响及与EMT的关系

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山东医药2019年第

59卷第

17期

Cripto-1 siRNA联合5-FU对大肠癌细胞增殖

和迁移的影

响及与

EMT的关系

华丽打周燕红2,游红霞

2

(1湖北医药学院,湖北十堰

442000 ;2

湖北科技学院

)

摘要:目的 观察小干扰RNA(siRNA)技术沉默大肠癌细胞中Cripto-1表达联合5-氟尿疇睫(5-FU)对大肠癌

细胞增殖和迁移的影响,并探讨其与上皮间质转化(EMT)的关系。方法体外培养人大肠癌Lovo细胞

,将细胞分

为正常对照组、Cripto-l siRNA

组、5-FU组

、联合组。

正常对照组加入含10%胎牛血清的

RPMI1640

培养液中常规

培养 48 h; Cripto-1 siRNA 组加入 100 pL 无血清 Opti-MEM

培养基、8 pL LipofectamineTM2000、10 pL siRNA 混匀,进

行转染,

转染完成后更换普通培养基继续培养48 h;5-FU组加入10 mg/L 5-FU培养48 h;联合组先按

Cripto-1 siR

­

NA 组的方法进行转染,然后加入10 mg/L5-FU继续培养48 ho采用CCK-8法检测各组细胞增殖情况,Transwell实 验观察细胞的迁移能力‘Western blotting法检测细胞中Cripto-1蛋白及上皮标志物E钙黏蛋白(E-cadherin)、间质 标志物Snail蛋白的相对表达量。结果Cripto-1 siRNA,5-FU组、联合组的细胞增殖率均低于正常对照组

(P均<

0. 05),联合组细胞细胞增殖率低于Cripto-1 siRNA和5-FU组(P均<0. 05) Cripto-1 siRNA

组与5-FU组比较差异

无统计学意义(P >0.05)。Cripto-1 siRNA、5-FU组、

联合组的细胞迁移数较正常对照组减少(P均<0. 05)联合组

细胞迁移数较 Cripto-1 siRNA 组和 5-FU 组减少(P 均 <0.05)5-FU 组较 Cripto-1 siRNA 组减少

(P <0.05)。Cripto-

1 siRNA组、5-FU组、联合组Cripto-1和

Snail蛋白表达低于正常对照组,E-cadherin蛋白表达高于正常对照组(P均

< 0. 05 );联合组 Cripto-1 和 Snail 蛋白表达低于 Cripto-1 siRNA 组、5-FU 组,E-cadherin 蛋白表达高于 Cripto-1 siRNA 组、

5-FU组(P均<0. 05) ;Cripto-1 siRNA组与5-FU组各蛋白表达比较差异无统计学意义(P均>0. 05)。

结论

采用siRNA技术沉默大肠癌细胞中的Cripto-1表达,可增强5-FU对大肠癌细胞增殖和迁移的抑制作用,Cripto-1可 能通过介导EMT促进大

肠癌的发生发展

关键词:大肠癌;Cripto-1基因;5-氟尿疇睫;细胞增殖;细胞迁移;上皮间质转化doi : 10. 3969/j. issn.

1002-266X.

2019.17.

005

中图分类号:R735.34 文献标志码:A 文章编号

:1002-266X(2019)7-0016-04

Effects of Cripto-1 siRNA combined with 5-FU on proliferation and migration of colorectal cancer cells and its relationship with EMTHUA Li

1, ZHOU Yanhong, YOU Hongxia

(1 Hubei Medical College, Shiyan 442000

, China /

Abstract: Objective To observe the effects of silencing Cripto-1 expression combined with 5-fluorouracil (5-FU)

on

the proliferation and migration of colorectal cancer cells by small interfering RNA ( siRNA) technology, and

to explore its

relationship with epithelial-mesenchymal transition ( EMT) . Methods Human colorectal cancer Lovo cells were cultured in vitro, and then were divided into the normal control group, Cripto-1 siRNA group, 5-FU group

, and combination

group.

The cells in the normal control group were added with RPMI1640 medium containing 10% fetal bovine serum and were cul­

tured for 48 h; the cells in the Cripto-1 siRNA group were added with the mixture of 100 pL

serum-free

opti-MEM medi­

um, 8 pL LipofectamineTM 2000, and 10 pL siRNA, and then were transfected, after transfection, the medium was re

­

placed with the normal medium, and then the cells were cultured for 48 h; cells in the 5-FU group were added with 10 mg/ L 5-FU for 48 h; the cells in the combination group were first transfected with the same method of the Cripto-1 siRNA group, and then were added with 10 mg/L 5-FU for 48 h. The cell proliferation in each group was detected by CCK-8, the migration ability of cells was detected by Transwell experiment, and the relative expression levels of Cripto-1

protein

and

基金项目:

湖北省卫生健康委员会面上项目(

WJ2019M092)。

第一作者简介:华丽(1990-),女,在读硕士研究生,主要研究方向为消化道肿瘤的防治

E-mail:

1107997958@qq.com

通信作者简介:周燕红(1971-),女,教授,硕士研究生导师,主要研究方向为消化道肿瘤的防治。E-mail: Yanhongzhou326@163.com

16山东医药2019年第

59卷第

17期

epithelial marker E-cadherin and the interstitial marker Snail protein were detected by Western blotting. Results The cell proliferation rates of the Cripto-1 siRNA group, 5-FU group and combination group were lower than

that of the normal con­

trol group ( all P < 0. 05) . The cell proliferation rate of the combination group was lower than those of the Cripto-1 siRNA group and 5-FU group ( both P <0.05) , and there was no significant difference between the Cripto-1 siRNA group and the

5-FU group (P >0. 05 ) . The migration cells in the Cripto-1 siRNA, 5-Fu group, and combination group

were

less than

those of the normal control group ( all P <0.05) , and the migration cells in the combination group were less than those of the Cripto-1 siRNA group and 5-Fu group ( both P < 0. 05 ) ,and the 5-FU group was less than the Cripto-1

siRNA

group

( P < 0. 05) . The Cripto-1 and Snail protein expression of the Cripto-1 siRNA group,5 -FU group,combination group was lower than that of normal control group,and the expression of E-cadherin protein was higher than that of normal control group ( all P < 0. 05) . The expression of Cripto-1 and Snail protein in the combination group was lower than

that in

Cripto-

1 siRNA group and 5-FU group,and the expression of E-cadherin protein was higher than that of Cripto-1 siRNA group

and

5-FU group ( all P < 0. 05); there was no significant difference in the protein expression between the Cripto-1 siRNA group