title: miR-503 inhibits proliferation making human hepatocellular carcinoma cells susceptible to 5‑fluorouracil by targeting EIF4E.
abstract: Hepatocellular carcinoma (HCC), a disease that is a major health care issue across the globe, includes the deviant expression of miRNAs in its development, progression, and resistance to treatment. We focused our study on miR‑503 expression and its role in HCC. miR‑503 was found in HCC tissues and cell lines using quantitative real-time PCR (RT‑qPCR). Western blot analyses and the luciferase reporter assay were used to determine the miR‑503 potential target in the HCC cells. We used MTT to analyze cell proliferation activity and noted that there was a considerable decrease of miR‑503 in HCC tissues and cell lines when measured against the controls. miR‑503 upregulation decreased expression of eukaryotic translation initiation factor 4E (EIF4E), and reduced HCC cell proliferation and sensitized HCC cells to anticancer drugs. miR‑503 overexpression hindered luciferase activity of EIF4E 3' untranslated region-based reporter construct among HepG2, BEL-7402, and SMMC-7721 cells, revealing that miR‑503 may increase sensitivity to therapies at least partially through targeting EIF4E suppression of HCC proliferation.
authors.affiliation: Institute of Pharmacy and Pharmacology, University of South China, Hengyang, Hunan 421001, P.R. China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Yang
authors.affiliation: Changsha Health Vocational College, Changsha, Hunan 410100, P.R. China.
authors.forename: Jinglei
authors.initials: J
authors.lastname: Zang
authors.affiliation: Institute of Pharmacy and Pharmacology, University of South China, Hengyang, Hunan 421001, P.R. China.
authors.forename: Xia
authors.initials: X
authors.lastname: Pan
authors.affiliation: Institute of Pharmacy and Pharmacology, University of South China, Hengyang, Hunan 421001, P.R. China.
authors.forename: Jie
authors.initials: J
authors.lastname: Yin
authors.affiliation: Institute of Pharmacy and Pharmacology, University of South China, Hengyang, Hunan 421001, P.R. China.
authors.forename: Qiong
authors.initials: Q
authors.lastname: Xiang
authors.affiliation: Institute of Pharmacy and Pharmacology, University of South China, Hengyang, Hunan 421001, P.R. China.
authors.forename: Jia
authors.initials: J
authors.lastname: Yu
authors.affiliation: Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan 421001, P.R. China.
authors.forename: Runliang
authors.initials: R
authors.lastname: Gan
authors.affiliation: Institute of Pharmacy and Pharmacology, University of South China, Hengyang, Hunan 421001, P.R. China.
authors.forename: Xiaoyong
authors.initials: X
authors.lastname: Lei
mesh_terms: D006528:Carcinoma, Hepatocellular / Q000188:drug therapy / Q000235:genetics* / Q000473:pathology; D049109:Cell Proliferation / Q000187:drug effects / Q000235:genetics*; D002478:Cells, Cultured; D015536:Down-Regulation / Q000187:drug effects / Q000235:genetics; D019008:Drug Resistance, Neoplasm / Q000235:genetics; D039561:Eukaryotic Initiation Factor-4E / Q000235:genetics*; D005472:Fluorouracil / Q000627:therapeutic use; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects; D056945:Hep G2 Cells; D006801:Humans; D008113:Liver Neoplasms / Q000188:drug therapy / Q000235:genetics* / Q000473:pathology; D035683:MicroRNAs / Q000502:physiology*
chemical_list: D039561:Eukaryotic Initiation Factor-4E; C545473:MIRN503 microRNA, human; D035683:MicroRNAs; D005472:Fluorouracil