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Subtitle:
Article type: Research Article
Authors: Wu, Z.Y.a | Wang, S.M.a | Chen, Z.H.b | Huv, S.X.a | Huang, K.a | Huang, B.J.a | Du, J.L.a | Huang, C.M.a | Peng, L.a | Jian, Z.X.a | Zhao, G.a; *
Affiliations: [a] Department of General Surgery, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China | [b] Department of General Surgery, Hospital of Traditional Chinese Medicine of Zhongshan, Zhongshan, Guangdong, China
Correspondence: [*] Corresponding author: G. Zhao, Department of General Surgery, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Zhongshan Second Road, 510080 Guangzhou, Guangdong, China. Tel.: +86 020 83827812; E-mail:[email protected]
Abstract: BACKGROUND: Analysis using publicly available algorithms has found that high mobility group AT-hook 2 (HMGA2), a key transcriptional regulatory factor, is a potential target of microRNA-204 (miR-204). Some studies have shown that both miR-204 and HMGA2 are associated with cancer development. OBJECTIVE: We examined the possible relationship between miR-204 and HMGA2 in the development of thyroid cancer. METHODS: We assessed miR-204 expression in thyroid cancer specimens and cell lines using real-time polymerase chain reaction (PCR). Luciferase reporter assay was used to confirm the target associations. The effect of miR-204 on cell proliferation was confirmed with tetrazolium and colony formation assays. Gene and protein expression were examined using real-time PCR and western blotting, respectively. RESULTS: MiR-204 was downregulated in the thyroid cancer specimens and cell lines, and targeted the 3^\prime untranslated region of HMGA2 directly. MiR-204 overexpression decreased cyclin D1 and Ki67 expression and increased P21 expression, which subsequently inhibited thyroid cancer cell proliferation. CONCLUSIONS: Our findings suggest that miR-204 plays a protective role by inhibiting thyroid cancer cell proliferation, and may identify new targets for anti-cancer treatment.
Keywords: MiR-204, HMGA2, proliferation, thyroid cancer
DOI: 10.3233/CBM-150492
Journal: Cancer Biomarkers, vol. 15, no. 5, pp. 535-542, 2015
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