【摘要】 背景与目的人长链非编码RNA基因的异常表达与多种肿瘤有关。本研究旨在探讨人长链非编码RNA基因SPRY4-IT1对肺癌细胞A549侵袭和迁移能力的影响及机制。方法将SPRY4-IT1转染入肺癌A549细胞系,采用RT-PCR方法检测重组质粒在细胞中表达水平比较;采用MTT和Transwell检测A549细胞侵袭和迁移能力的变化,采用Western blot方法检测SPRY4-IT1对MMP-2和MMP-9蛋白的影响。结果转染pc DNA3.1-SPRY4-IT1细胞划痕两侧细胞间距较转染pc DNA3.1细胞明显变窄,其穿膜细胞数为(207±34)个/视野,相比对照组明显增多(P<0.05),且转染pc DNA3.1-SPRY4-IT1细胞中的基质金属蛋白酶(matrix metalloproteinase,MMP)-2及MMP-9蛋白表达较转染空质粒组均有升高。结论在肺癌A549细胞中过表达SPRY4-IT1可增强细胞的侵袭、迁移能力,且细胞内MMP-2及MMP-9表达升高,提示SPRY4-IT1可能通过调控MMP影响肺癌的侵袭和转移能力。更多还原

【Abstract】 Background and objective The abnormal expression of human long chain non encoding RNA gene is related to many kinds of tumors. The aim of this study is to investigate the expression of long non-coding RNA maternally expressed gene 3(SPRY4-IT1) in lung cancer(A549) cells, and to observe the effect of SPRY4-IT1 on the invasion and migration of A549 cells. Methods The levels of SPRY4-IT1 in A549 was detected by Real-time PCR. The effects of SPRY4-IT1 on the invasion and migration of A549 cell were analyzed by MTT and Transwell assay. The expression of matrix metalloproteinase(MMP) family proteins was determined by Western blot. Results The invasion and migration of A549 cells were increased after SPRY4-IT1 over-expression. The cell spaces were narrower after SPRY4-IT1 over expression in the wound healing assay. Transwell assays showed that the numbers of transmembrane A549 cells were significantly higher in SPRY4-IT1 over expression group than that in control group(P<0.05). Meanwhile, over expression of SPRY4-IT1 reduced the expression of MMP-2 and MMP-9. Conclusion Over expression of SPRY4-IT1 enhanced the invasion and migration of A549 cells. MMP-2 and MMP-9 might play an important role in this regulation.更多还原