Int J Cancer 2002, 97:186–194.PubMedCrossRef 19. Gao L, Yan L, Lin B, Gao J, Liang X, Wang Y, et al.: Enhancive effects of Lewis y antigen on CD44-mediated adhesion and spreading of human ovarian cancer cell line RMG-I. J Exp Clin Cancer Res 2011,30(1):15.PubMedCrossRef Competing interests The authors declare that they have no competing interests. Authors’ contributions JG carried out most parts of the experiment; CL, RH, SG and DZ participated in the experiment; BL and SZ participated in the design of the study; DL and JL performed the statistical analysis; ZH participated in its design and coordination and helped to draft the manuscript. All authors read and approved the final manuscript.”
“Introduction

Metastasis is the leading cause of failure BAY 1895344 mw in clinical treatment of malignant tumors including lung cancer. The metastasis-associated gene 1 (MTA1) has been identified as one critical see more regulator of the metastasis of many human cancers [1–4]. In our previous studies we deomnstrated that MTA1 promoted the metastasis of non-small cell lung cancer (NSCLC), and identified miR-125b as a downregualted miRNA in NSCLC cell line upon MTA1 depletion [5, 6]. However, the role of miR-125b and MTA1 in the regulation of invasive phenotype of NSCLC cells remains unclear. It has been shown that miR-125b level was significantly correlated with good prognosis of liver cancer [7]. miR-125b was deregulated in lung cancer, oral squamous cell carcinoma,

prostate cancer and pancreatic cancer [8–11]. However, controversial properties of miR-125b have been reported in different types of cancer. In human invasive breast cancer, miR-125b functioned as a tumor suppressor by regulating ETS1 proto-oncogene [12]. In addition, miR-125b was underexpressed in metastatic hepatocellular carcinoma (HCC) and inhibited HCC cell migration and invasion by directly targeting oncogene LIN28B2 [13, 14]. In contrast, exogenous miR-125b expression increased the migration of type I endometrial carcinoma cell line [15]. Moreover, miR-125b was proposed to function as a metastasis CX-4945 promoter through targeting STARD13 in breast cancer

cells [16]. These data suggest that miR-125b may perform different regulatory functions on tumor progression in a cellular context-dependent manner. In the present Progesterone study, we established two MTA1-knockdown NSCLC cell lines using stable transfection technology and validated the effects of MTA1 depletion on the expression of miR-125b. Using these cell lines we further examined the function of miR-125b in the regulatuion of cell migration and the interaction between miR-125b and MTA1. Our resutls showed that miR-125b acted as a metastasis suppressor in vitro and reversed the stimulatous effect of MTA1 on the migration of NSCLC cell lines. Methods Cell culture Human non-small lung cancer cell lines 95D and SPC-A-1 were purchased from Shanghai Cell Bank of Chinese Academy of Science (Shanghai, China).