Has_circ_0055625 from circRNA profile increases colon cancer cell growth by sponging miR-106b-5p.

Circular RNAs (circRNA) are endogenous noncoding RNAs and play important roles in cancer; however, the roles of circRNAs in colon cancer are far from clear. The circRNA expression profile in colon cancer tissues was analyzed by microarray. The data from microarray showed that there were 198 upregulated and 136 downregulated circRNAs in colon cancer tissues. Among the top 10 upregulated circRNAs, hsa_circ_0055625 (circ_0055625) was confirmed to be significantly upregulated in colon cancer tissues. Further analysis demonstrated that circ_0055625 might get involved in the pathogenesis of colon cancer by functioning as miRNA sponges and performed bioinformatics analysis of the predicted circ_0055625/miR-106b-5p (miR-106b)/ITGB8 network. Moreover, we found that circ_0055625 expression was associated with pathological TNM stage and metastasis. These data indicated that circ_0055625/miR-106b/ITGB8 played a role in promoting tumor growth and metastasis, which suggested that circ_0055625 was a potential biomarker of colon cancer.

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