中文摘要：

目的：了解微小RNA-301a-3p（miRNA-301a-3p）在胰腺导管腺癌组织和细胞中的表达及其对胰腺导管腺癌细胞株侵袭、迁移以及成瘤能力的影响。方法采用实时定量PCR分析20例胰腺导管腺癌组织、癌旁组织以及6株癌细胞、正常胰腺导管细胞中miRNA-301a-3p的表达水平。分别过表达或抑制相应细胞株中miRNA-301a-3p的表达，通过体内体外实验观察其变化对癌细胞侵袭、迁移以及成瘤能力的影响。结果胰腺导管腺癌组织及癌细胞株中miRNA-301a-3p的表达量均较癌旁组织（P＜0．05）和正常胰腺导管细胞升高（P＜0．05）。 miRNA-301a-3p可影响癌细胞在体外的侵袭、迁移能力，过表达miRNA-301 a-3 p可增强癌细胞的体内成瘤能力。结论在胰腺导管腺癌中， miRNA-301a-3p发挥了癌基因的功能，其表达水平上调参与了胰腺导管腺癌的发生发展。

英文摘要：

Objective To investigate the expression of miRNA-301a-3p in pancreatic cancer and to correlate the expression on invasion , migration and colony formation of pancreatic cancer cells .Methods The expression of miRNA-301a-3p in 20 paired pancreatic cancer tissues and matched adjacent tissues , and pancreatic cancer cell lines and normal pancreatic ductal cells were detected by real -time PCR.miRNA-301a-3p mimics or inhibitors were used to up-regulate or down-regulate the miRNA-301a-3p level in pancre-atic cancer cell lines in order to figure out the effects of miRNA-301a-3p on cell invasion, migration and col-ony formation of pancreatic cancer cells , respectively .Results In pancreatic cancer tissues and cell lines , miRNA-301a-3p was significantly up-regulated when compared with the matched adjacent tissues （ P 〈0.05） and normal pancreatic ductal cells （P〈0.05）, respectively.Overexpression or downexpression of miRNA-301a-3p enhanced or suppressed colony formation , invasion and migration abilities of pancreatic cancer cells in vitro.Upregulation of miRNA-301a-3p promoted tumorigenesis in vivo.Conclusion miR-NA-301a-3p might function as an oncogene to promote tumorigenesis in pancreatic cancer .