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Circular RNA circ-FOXM1 facilitates cell progression as ceRNA to target PPDPF and MACC1 by sponging miR-1304-5p in non-small cell lung cancer

Liu, Guohua, Shi, Hanbing, Deng, Liling, Zheng, Hongyan, Kong, Weili, Wen, Xiaoqiang, Bi, Hongxia
Biochemical and biophysical research communications 2019 v.513 no.1 pp. 207-212
carcinogenesis, cell differentiation, circular RNA, colorectal neoplasms, lung neoplasms, lymph nodes, prognosis, stem cells, tissues
Circular RNAs (circRNAs) have recently been considered as key regulators in carcinogenesis. Nevertheless, the study of circRNAs involved in non-small cell lung cancer (NSCLC) remains largely unclear. In this study, we aim to explore the clinical significance, regulatory effect and mechanism of circ-FOXM1 in NSCLC. The results indicated that circ-FOXM1 overexpression was observed in NSCLC tissues and closely associated with lymph node invasion, higher TNM stage, and unfavorable prognosis. Furthermore, knockdown and ectopic expression of circ-FOXM1 significantly inhibited and promoted the growth, migration and invasion of NSCLC cells, respectively. Mechanistically, miR-1304-5p was discovered as a direct target of circ-FOXM1. Circ-FOXM1 upregulated the level of pancreatic progenitor cell differentiation and proliferation factor (PPDPF) and metastasis-associated in colon cancer 1 (MACC1) by sponging miR-1304-5p, thereby increasing the proliferation and invasion of NSCLC cells. Taken together, this work revealed that circ-FOXM1/miR-1304-5p/PPDPF/MACC1 signaling was essential for the development and progression of NSCLC.