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lncRNA MALAT1调控miR-204表达影响胰腺癌细胞的生物学行为 被引量:21

Long chain non-coding MALAT1 affects biological behavior of pancreatic cancer cells by regulating miR-204 expression
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摘要 目的:探讨长链非编码RNA(long chain non-coding RNA,lnc RNA)肺腺癌转移相关转录因子1(metastasis-associated lung adenocarcinoma transcript 1,MALAT1)通过调控miR-204的表达影响胰腺癌细胞恶性生物学行为的作用及其可能机制。方法:收集2016年10月至2016年12月在河南省中医院6例胰腺癌手术切除标本及其对应的癌旁组织标本。用实时荧光定量PCR检测胰腺癌组织和癌旁组织、5种胰腺癌细胞(Bx PC-3、HS-7667、PANC-1、As PC-1和SW-1990)中lnc RNA MALAT1的表达,双荧光素酶报告基因检测MALAT1与miR-204的相互作用,流式细胞术分析MALAT-1对胰腺癌细胞的细胞周期及细胞凋亡的影响;划痕愈合实验和Transwell侵袭实验检测MALAT1和miR-204对胰腺癌细胞迁移和侵袭能力的影响,Western blotting检测MALAT1对上皮间质转化相关蛋白的影响。结果:lnc RNA MALAT1在胰腺癌组织中表达水平明显高于癌旁组织(1.85±0.52vs 0.34±0.12,P<0.05),MALAT1在SW-1990细胞中的表达水平最高(P<0.05)。lnc RNA MALAT1能与miR-204的3’UTR特异性结合,调控miR-204的表达活性。抑制MALAT1表达后,可诱导SW-1990细胞G2/M细胞周期停滞、促进细胞凋亡,SW-1990细胞的迁移和侵袭能力减弱(均P<0.05),下调SW-1990细胞N-cadherin、E-cadherin和vimentin的表达。过表达miR-204可促进SW-1990细胞迁移和侵袭。结论:lnc RNA MALAT1通过靶向调控miR-204表达影响胰腺癌细胞的恶性生物学行为,在胰腺癌的发生发展过程中起重要作用。 Objective: To investigate the effect of long-chain non-coding RNA metastasis-associated lung adenocarcinoma transcript 1 (lncRNA MALAT1 ) on the malignant biological behavior of pancreatic cancer cells by regulating miR-204 expression and its possible mechanisms. Methods: Six pairs of pancreatic cancer tissues and corresponding para-cancerous tissues were sampled during surgery from October 2016 to December 2016 in Henan Provincial Hospital of Traditional Chinese Medicine. qPCR was used to detect the ex- pression of lncRNA MALAT1 in pancreatic cancer tissues, adjacent normal tissues and different pancreatic cancer cells (BxPC-3, HS- 7667, PANC-1, AsPC-1 and SW-1990). Double luciferase reporter gene assay was used to detect the interaction between MALAT 1 and miR-204. Flow cytometry was used to determine the effect of MALAT1 on cell cycle and apoptosis of pancreatic cancer cells. The ef- fects of MALAT1 and miR-204 on the migration and invasion of pancreatic cancer cells were examined by Wound-healing assay and Transwell invasion assay, respectively. The effect of MALAT1 on EMT-related proteins was detected by Western blotting. Results: Compared with para-cancer tissue, the expression of lncRNA MALAT1 in pancreatic cancer tissues was significantly increased (1.85±0.52 vs 0.34±0.12, P〈0.05). The expression level of lncRNA MALAT1 in pancreatic cancer SW-1990 cell line was the highest (P〈 0.05). lncRNA MALAT1 could bind specifically to the 3 'UTR of miR-204 to modulate the expression of miR-204. Inhibition of MALAT1 expression could induce G2/M cell cycle arrest, and thus promote SW-1990 cell apoptosis; moreover, the ability of migration and invasion of SW-1990 cells was weakened and EMT-related proteins (N-cadherin, E-cadherin and vimentin) were down-regulated af- ter inhibiting the expression of MALAT1. However, over-expression of miR-204 could promote the migration and invasion of SW-1990 Cells. Conclusion: lncRNA MALAT1 plays an important role in the development and progression of pancreatic cancer. It can regulate the malignant biological behavior of pancreatic cancer cells by targeting miR-204.
出处 《中国肿瘤生物治疗杂志》 CAS CSCD 北大核心 2018年第1期79-84,共6页 Chinese Journal of Cancer Biotherapy
基金 河南省科技攻关项目资助(No.142102310040)~~
关键词 胰腺癌 SW-1990细胞 lncRNA MALAT1 微小RNA-214(miR-204) 迁移 侵袭 pancreatic cancer: SW- 1990 cell lncRNA MALAT 1 miR-204 migration invasion
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