MicroRNA-135a-3p is downregulated and serves as a tumour suppressor in ovarian cancer by targeting CCR2 - 20/09/18
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Graphical abstract |
Highlights |
• | MiR-135a-3p is down-regulated in ovarian carcinoma. |
• | MiR-135a-3p inhibits ovarian cancer cell growth and aggressiveness. |
• | CCR2 is the directly target gene of miR-135a-3p. |
• | Over-expression of CCR2 reverses the inhibitory effect of miR-135a-3p. |
Abstract |
MicroRNAs have been demonstrated to play a crucial role in the development of ovarian cancer. Many studies prove that forms of miR-135a, including miR-135a-5p and miR-135a-3p, serve as tumour suppressors in multiple cancers. Nevertheless, the precise function of miR-135a-3p and the molecular mechanisms underlying the involvement of miR-135a-3p in ovarian carcinoma cell growth and metastasis remain largely unknown. Herein, we report that miR-135a-3p expression was significantly downregulated in ovarian carcinoma tissues compared with corresponding adjacent non-tumour tissues. Ectopic miR-135a-3p expression inhibited ovarian carcinoma cell proliferation, migration and invasion in vitro. Additionally, the overexpression of miR-135a-3p inhibited epithelial-mesenchymal transition (EMT) in ovarian cancer cells. A luciferase reporter assay confirmed that the C-C chemokine receptor type 2 (CCR2) gene was the target of miR-135a-3p. In addition, CCR2 depletion mimicked the inhibitory effects of miR-135a-3p on ovarian cancer cells in vitro. Rescue experiments using CCR2 overexpression further verified that CCR2 was a functional target of miR-135a-3p. Xenograft model assays demonstrated that miR-135a-3p functions as an anti-oncogene by targeting CCR2 in vivo. Taken together, these data prove that miR-135a-3p serves as a tumour suppressor gene in ovarian cancer by regulating CCR2.
Le texte complet de cet article est disponible en PDF.Keywords : Ovarian cancer, miR-135a-3p, CCR2, Migration, Invasion
Plan
Vol 107
P. 712-720 - novembre 2018 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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