miR-205-5p Promotes the Proliferation, Migration, and Invasion of Nasopharyngeal Carcinoma Cells by Regulating CALM1.

Nasopharyngeal carcinoma (NPC), a malignant tumor originating from the epithelium and glands. MicroRNAs (miRNAs) play an essential role in the tumorigenesis and metastasis of NPC. They are effective biomarkers in the detection of malignant progression of NPC. In this study, we analyzed the expression profiles of miRNAs in NPC patients with Gene Expression Omnibus (GEO) database. ceRNA networks of NPC were constructed and target miRNAs were screened. MTT, colony formation and Transwell experiments were used to explore the effects of miR-205-5p on the proliferation, migration and invasion ability of NPC cells. Bioinformatics analysis combined with Double luciferase experiment verified the binding relationship between miR-205-5p and CALM1. We identified 34 long non-coding RNAs (lncRNAs), 22 miRNAs, and 145 messenger RNAs (mRNAs) and constructed a competing endogenous RNAs (ceRNA) network to explain the relationship between RNA expression profiles and NPC progression. Of which, we found that 5 miRNAs (hsa-let-7d-5p, hsa-let-7e-5p, hsa-let-7f-5p, hsa-miR-143-3p and hsa-miR-205-5p) are related to clinical features. We further found that miR-205-5p was highly expressed in NPC cell lines. In addition, MTT, colony formation and Transwell assays showed that miR-205-5p promoted the proliferation, migration and invasion of NPC cells. Double luciferase detection showed that miR-205-5p could target combined with CALM1. In addition, we found that miR-205-5p could promote the proliferation, migration and invasion of NPC cells by inhibited the expression of CALM1. Overall, the present study demonstrated that as a carcinogenic factor, miR-205-5p can affect the malignant progression of NPC by mediating CALM1.