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微小RNA-21表达在卵巢癌细胞生长和凋亡过程中的作用

2021-06-08 来源:易榕旅网
微小RNA-21表达在卵巢癌细胞生长和凋亡过程中的作用

娄艳辉

崔竹梅

王福玲

杨兴升

     目的探讨微小RNA-21( miR-21)在卵巢癌细胞生长、凋亡中的作用及调节机制。方法构建表达miR-21的重组干扰载体pSIREN-miR-21质粒,采用酶切鉴定和测序法证实。实验分为3组,即转染组:卵巢癌细胞株OVCAR3细胞转染重组干扰载体pSIREN-miR-21质粒;阴性对照组:OVCAR3细胞转染阴性对照pSIREN-miR-21-Neg质粒;空白对照组:OVCAR3细胞不转染质粒。采用茎环实时荧光定量逆转录(RT)-PCR技术检测3组细胞中miR-21的表达,蛋白印迹法检测3组细胞中程序性细胞死亡因子4( PDCD4)蛋白的表达,四甲基偶氮唑蓝(MTT)比色法及流式细胞仪检测3组细胞的增殖及凋亡情况。结果成功构建了表达miR-21的重组干扰载体pSIREN-niR-21质粒,并经酶切鉴定和测序法证实。转染组、阴性对照组和空白对照组OVCAR3细胞中niR-21的表达水平分别为0. 26±0. 08、1.26±0.21和1.00,转染组明显低于阴性对照组和空白对照组,差异有统计学意义(P<0.01)。转染组、阴性对照组和空白对照组OVCAR3细胞中PDCD4蛋白的灰度值分别为1443 ±33、858±19和846±16,转染组明显高于阴性对照组和空白对照组,差异有统计学意义(P<0.01)。转染组、阴性对照组和空白对照组OVCAP3细胞增殖的A值分别为0.661±0.015、0.848±0. 150、0.935±0.133,转染组明显低于阴性对照组和空白对照组,差异有统计学意义(P<0.01)。转染48 h后,转染组细胞的早期凋亡率明显高于阴性对照组和空白对照组[分别为(25.821±0. 763)%、(0. 010 ±0. 003)%、(0. 238±0.023)%;P <0.01];转染72 h后,转染组细胞的早期凋亡率

和晚期凋亡率均明显高于阴性对照组和空白对照组[早期凋亡率分别为( 30. 480±0.821)%、(7. 792±0.312)%、(7. 033±0.257)%,P<0. 01;晚期凋亡率分别为(3. 558±0.211)%、(1.557±0. 067)%、(1. 049±0. 028)%,P<0.05]。结论miR-21参与调节卵巢癌细胞的生长和凋亡过程,可能通过调控PDCD4蛋白的表达而发挥作用。

卵巢肿瘤;  微RNAs;  RNA结合蛋白质类;凋亡调节蛋白质类;细胞系,肿瘤;

细胞凋亡

LOU Role of microRNA-21 in the proliferation and apoptosis of ovarian epithelial carcinoma cells Yan-hui *CUi Zhu-mei WANG Fu-ling YANG Xing-sheng *Department of Gynecology, Affiliated Hospital 

of Medical College, Qingdao University, Qingdao 266001, China 

      Objective  To investigate the role and mechanism of microRNA-21 (miR-21) in the 

proliferation and apoptosis of ovarian epithelial carcinoma cells. Methods  A short-hairpin RNA specifically 

targeting miR-21 plasmid was constructed, and the recombinant was identified by restriction endonuclease analysis and DNA sequencing. Three experimental groups were included, transfection group (transfected with 

pSIREN-miR-21 ), negative control group ( transfected with pSIREN-miR-21-neg) and blank control group (without transfection plasmid ). The expression of miR-21 was detected by stem-loop real-time reverse 

transcription (RT)-PCR in OVCAR3 cells ,and western blot was used to detect the expression of programmed cell death 4 ( PDCD4 ) protein. Tethyl thiazolyl tetrazolium (MTT) and flow cytometry method were used respectively. Results  Recombinant plasmid (pSIREN-miR-21) was constructed successfully and identified by restriction endonuclease analysis and DNA sequencing. The relative expression level of miR-21 in cells 

10. 3760/cma. j. issn. 0529-567x. 2011. 09. 010

  作者单位:266001 青岛大学医学院附属医院妇科(娄艳辉、崔竹梅、王福玲);山东大学齐鲁医院妇产科

(杨兴升)

万方数据transfection, negative control and blank control group was 0.26 ± 0.08, 1.26 ± 0.21  and 1.00 

respectively. The level of miR-21 in the cells in transfection group was significantly lower than those in the 

negtive control and blank control group(P <0. 01 ). The gray scale of PDCD4. protein was 1443 ±33,858 ± 19 and 846 ± 16 in the transfection group, negative control and blank control group respectively. The value of PDCD4 in transfection group was higher than other control groups, and there were significantly difference among them( P <0. 01 ). Moreover, the optical density of the cells in transfection group was 0. 661 ±0. 015,significantly lower than those in two control groups (0. 848 ± 0. 150 for negative control, 0. 935 ± 0. 133 for 

blank control,  P < 0. 01 ). Forty-eight hours after tranfection, the rate of viable apoptotic cell was significantly higher than negative control and blank control group [ (25.821 ± 0. 763 )% vs.  (0. 010 ± 

0. 003 ) % vs. (0. 238 ± 0. 023) % ; P < 0. 01 ] ;72 hours after tranfection, the rates of viable apoptotic cell 

and necrotic cell were all higher than the two control groups [ the rate of viable apoptotic cell was ( 30. 480 ±

0. 821 ) %, ( 7. 792 ± 0. 312 ) % and ( 7. 033 ± 0. 257 ) % respectively ( P < 0. 01 ) ; the rate of necrotic cell 

was (3.558 ±0.211)%, (1.557 ±0.067)% and (1.049 ±0.028)%, respectively (P<0. 01)].

Conclusion  miR-21 might play an important role in the proliferation and apoptosis of ovarian epithelial 

carcinoma cells through negatively control the expression of PDCD4.

Ovarian neoplasms;  MicroRNAs;   RNA-binding proteins ;   Apoptosis regulatory 

proteins;  Cell line,tumor;   Apoptosis 

万方数据686

万方数据1111拦!!上!l'上自!!墨!!!!刍:!』!笙!鱼盔垡!!到竺!i!!』!!型!!:!!!!!!!!!!!!,!!I!!=!!!!:!!!!!:y!!:!垒:盟!!:!参数点罔,将实验样本巾正常、坏死、凋产细胞【又分开,‘一期(或晚期)细胞凋广,簪rfl仪器r1动分析后凄取。i、统计学方法采JHSPSS13.0软件进行统计学处理。,实验数据均以戈±s表示,采川t检验。结果一、重组干扰载体的鉴定及纯化pSIREN.miR-21质粒经BamHI、融LⅡ双酶切后得到263bp的片段,经EcoRI、ngtII双酶切后得到322bp的片段;而pSIREN-miR.2l质粒无论是BamHI单酶切还是EcoRI单酶切,均无片段被切出,初步证明重组干扰载体pSIREN—miR.2l质粒构建成功。见图1。经酶切鉴定后,将pSIREN.miR一21质粒样品送美国lnvetrogen公司测序,确定各重组干扰载体构建成功。提取pSIREN.miR.21质粒并纯化,紫外分光光度计检测显示,以:砷//4:舯的比值均在1.8—2.0之间,证实所测质粒纯度较高,适于细胞转染使用。bp75005000500250I)、、mL物2:lldmllI.IC91.IJ“胁I/J3:“r,片Bgl,II议胁i』J4:B,m+llI』p矾l』J5:“n”II丫J胁f』Jn:术?}胁IJJ图lpSIREN・miR-2l质粒的酶切鉴定结果二、3组OVCAR3细胞巾miR一2I的表达转染组、阴性对照组和李白对照组OVCAR3细胞巾miIt.2l的表达水平分别为0.26±0.08、1.26±0.21和1.00,转染组明显低于阴性对照组和空白对照组,篾肄有统汁学意义(P<0.OI);而阴性对照组与窄白对照组比较,差蚌无统计学意义(P>0.05),,i、3组OVCAR3细胞巾PDCD4蛋白的表达转染组、阴性对照组和空n对照组OVCAR3细胞|_11PDCD4蛋白的灰度值分别为1443士33、858±19和846±16.转染组明娃高_F|{fj性对照组和空白对照组,差异有统i:t“1;f:意义(P<0.01);而阶陀对照万方数据组与窄门对照组比较,差异尤统计学意义(P>0.05)。见恪l2。P∞附p1“nl:fI’i川1㈦j2:…"《州f{川3:转r』l=川图2蛋白印迹法检测3组OVCAR3细胞中PDCIB蛋内的表达四、3组OVCAR3细胞的增殖情况转染组、阴性对照组和空白对照组OVCAR3细胞的A值分别为O.66l±0.015、0.848±0.150、0.935±0.133,转染组明显低于阴性对照组和空白对照组,差异有统计学意义(P<0.01);阴性对照组与空白对照组比较,差异无统计学意义(P>0.05)。转染组、阴性对照组OVCAR3细胞的增殖抑制率分别为(29.4±1.4)%、(9.0±1.3)%,转染组明显高于阴性对照组,差异有统计学意义(P<0.OI)。五、3组OVCAR3细胞的凋亡率转染48h后,转染组细胞的早期凋亡率明显高于阴性对照组和空白对照组(P<0.01);而阴性对照组与空白对照组细胞早期凋亡率比较,差异无统计学意义(P>0.05);各组细胞的晚期凋亡率比较,差异也无统计学意义(P>0.05)。转染72h后,转染组细胞的早期凋1L=率和晚期凋亡率均明显高于阴性对照组和空白对照组(P<0.05);而阴性对照组与空白对照组细胞的早期凋亡率和晚期凋亡率分别比较,差异均无统计学意义(P>0.05)。见表l。讨论一、miRNA的生物学特性及其与肿瘤的关系miRNA是近年研究发现的一组不编码蛋白质的短序列RNA,能够与多种mRNA分子序列互补结合,调节个体发育、f:细胞的分化、细胞增殖与凋f以及造m等多种生物学过程”剖。细胞失控性增殖、侵袭和转移是恶性肿瘤的主要特征。越来越多的研究表明,许多与细胞周期、凋亡、迁移等杆{火的癌基闪和抑癌基闪都可能受到miRNA的调控,提示miRNA可能在恶性肿瘤的发生和发展过程巾发挥着二{E常重要的作用【7引。miR.2l是实体肿瘤l}1最常见的过度表达的miRNA之~,通过靶向调节多种抑癌基冈,促进细胞增殖、对抗细胞凋亡,是肿瘤细胞万方数据@@[ 1 ]Chan SH, Wu CW, Li AF, et al. miR-21 microRNA expression       in human  gastric carcinomas  and  its clinical association. 

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万方数据微小RNA-21表达在卵巢癌细胞生长和凋亡过程中的作用

作者:作者单位:刊名:英文刊名:年,卷(期):

娄艳辉, 崔竹梅, 王福玲, 杨兴升, LOU Yan-hui, CUi Zhu-mei, WANG Fu-ling, YANG Xing-sheng

娄艳辉,崔竹梅,王福玲,LOU Yan-hui,CUi Zhu-mei,WANG Fu-ling(266001,青岛大学医学院附属医院妇科), 杨兴升,YANG Xing-sheng(山东大学齐鲁医院妇产科)中华妇产科杂志

Chinese Journal of Obstetrics and Gynecology2011,46(9)

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