Objective:To explore the relationship between the expression of miR-29c and clinicopathological characteristics of gastric cancer and predict the biological functions of target genes of miR-29c.Methods:The expression ...Objective:To explore the relationship between the expression of miR-29c and clinicopathological characteristics of gastric cancer and predict the biological functions of target genes of miR-29c.Methods:The expression and clinical data of microRNA of gastric cancer were downloaded from The Cancer Genome Atlas(TCGA)to analyze the expression of miR-29c in gastric cancer tissues and normal gastric mucosal tissues.Paraffin specimens of gastric cancer and normal tissues were collected to make tissue microarray.The expression of miR-29c in gastric cancer tissues and normal tissues were detected by miRNAscope technique.The relationship between the expression of miR-29c and clinicopathological characteristics of gastric cancer was analyzed by chi-square test.Target genes of miR-29c were predicted by TargetScan,Pictar,miRTarbase and Starbase databases,and enrichment analysis were performed on potential target genens.Results:TCGA analysis showed that the expression of miR-29c was significantly lower in gastric cancer tissue(n=434)than normal tissues(n=41,P<0.001).miRNAscope analysis showed that the expression of miR-29c was significantly lower in gastric cancer tissue than normal tissues(P<0.001),and was significantly associated with TNM staging,lymph node metastasis and histological type of gastric cancer patients(P<0.05).Database predicted 18 potential target genes that were enriched in DNA methyltransferase activity and cancer-associated miRNA signal pathways.Conclusion:miR-29c was expressed at a low level in gastric cancer tissue and associated with TNM staging,lymph node metastasis and histological type,and could become a potential prognosis marker of gastric cancer and a new target of molecular treatment.展开更多
目的:探讨microRNA-29c对人胰腺癌细胞(As PC-1、Bx PC-3、PANC-1、MIA Pa Ca-2)生物学特性的影响。方法:培养1种人正常胰腺上皮细胞(HPDE)及4种人胰腺癌细胞(As PC-1、Bx PC-3、PANC-1、MIA Pa Ca-2),采用real-time PCR法观察5种细胞系...目的:探讨microRNA-29c对人胰腺癌细胞(As PC-1、Bx PC-3、PANC-1、MIA Pa Ca-2)生物学特性的影响。方法:培养1种人正常胰腺上皮细胞(HPDE)及4种人胰腺癌细胞(As PC-1、Bx PC-3、PANC-1、MIA Pa Ca-2),采用real-time PCR法观察5种细胞系中microRNA-29c的表达差异,以microRNA-29c过表达腺病毒感染的PANC-1和MIA Pa Ca2细胞作为实验组,以空载体感染的PANC-1和MIA Pa Ca2细胞作为阴性对照组,采用细胞划痕实验、Transwell法检测两组细胞体外侵袭能力,Western blot检测两组细胞上皮间充质转化(EMT)相关蛋白波形蛋白(Vimentin)及E-钙粘蛋白(E-cadherin)的表达。结果:real-time-PCR显示各胰腺癌细胞系中microRNA-29c水平明显低于正常胰腺细胞系(P<0.05),细胞划痕实验发现感染腺病毒48 h后实验组PANC-1、MIA Pa Ca-2细胞的迁移距离明显短于阴性对照组(P<0.05),Transwell小室细胞侵袭实验发现实验组PANC-1和MIA Pa Ca-2细胞侵袭数量明显低于阴性对照组(P<0.05);Western blot蛋白免疫印迹结果显示PANC-1和MIA Pa Ca-2细胞过表达microRNA-29c后,Vimentin表达减少,E-cadherin表达增加。结论:microRNA-29c的过表达可有效抑制胰腺癌细胞的体外侵袭与转移,可能与Vimentin表达减少,E-cadherin表达增加有关,有望成为胰腺癌生物治疗的潜在靶点。展开更多
基金National Natural Science Foundation of China(82060437)。
文摘Objective:To explore the relationship between the expression of miR-29c and clinicopathological characteristics of gastric cancer and predict the biological functions of target genes of miR-29c.Methods:The expression and clinical data of microRNA of gastric cancer were downloaded from The Cancer Genome Atlas(TCGA)to analyze the expression of miR-29c in gastric cancer tissues and normal gastric mucosal tissues.Paraffin specimens of gastric cancer and normal tissues were collected to make tissue microarray.The expression of miR-29c in gastric cancer tissues and normal tissues were detected by miRNAscope technique.The relationship between the expression of miR-29c and clinicopathological characteristics of gastric cancer was analyzed by chi-square test.Target genes of miR-29c were predicted by TargetScan,Pictar,miRTarbase and Starbase databases,and enrichment analysis were performed on potential target genens.Results:TCGA analysis showed that the expression of miR-29c was significantly lower in gastric cancer tissue(n=434)than normal tissues(n=41,P<0.001).miRNAscope analysis showed that the expression of miR-29c was significantly lower in gastric cancer tissue than normal tissues(P<0.001),and was significantly associated with TNM staging,lymph node metastasis and histological type of gastric cancer patients(P<0.05).Database predicted 18 potential target genes that were enriched in DNA methyltransferase activity and cancer-associated miRNA signal pathways.Conclusion:miR-29c was expressed at a low level in gastric cancer tissue and associated with TNM staging,lymph node metastasis and histological type,and could become a potential prognosis marker of gastric cancer and a new target of molecular treatment.
文摘目的:探讨microRNA-29c对人胰腺癌细胞(As PC-1、Bx PC-3、PANC-1、MIA Pa Ca-2)生物学特性的影响。方法:培养1种人正常胰腺上皮细胞(HPDE)及4种人胰腺癌细胞(As PC-1、Bx PC-3、PANC-1、MIA Pa Ca-2),采用real-time PCR法观察5种细胞系中microRNA-29c的表达差异,以microRNA-29c过表达腺病毒感染的PANC-1和MIA Pa Ca2细胞作为实验组,以空载体感染的PANC-1和MIA Pa Ca2细胞作为阴性对照组,采用细胞划痕实验、Transwell法检测两组细胞体外侵袭能力,Western blot检测两组细胞上皮间充质转化(EMT)相关蛋白波形蛋白(Vimentin)及E-钙粘蛋白(E-cadherin)的表达。结果:real-time-PCR显示各胰腺癌细胞系中microRNA-29c水平明显低于正常胰腺细胞系(P<0.05),细胞划痕实验发现感染腺病毒48 h后实验组PANC-1、MIA Pa Ca-2细胞的迁移距离明显短于阴性对照组(P<0.05),Transwell小室细胞侵袭实验发现实验组PANC-1和MIA Pa Ca-2细胞侵袭数量明显低于阴性对照组(P<0.05);Western blot蛋白免疫印迹结果显示PANC-1和MIA Pa Ca-2细胞过表达microRNA-29c后,Vimentin表达减少,E-cadherin表达增加。结论:microRNA-29c的过表达可有效抑制胰腺癌细胞的体外侵袭与转移,可能与Vimentin表达减少,E-cadherin表达增加有关,有望成为胰腺癌生物治疗的潜在靶点。