title: MicroRNA-33b suppresses migration and invasion by targeting c-Myc in osteosarcoma cells.
abstract: MicroRNAs have emerged as fundamental regulators in gene expression through silencing gene expression at the post-transcriptional and translational levels. Osteosarcoma is the most common type of primary malignant bone tumor and is characterized by complex genetic changes and resistance to conventional treatments. In our study, the role of miR-33b in the progression and metastasis of osteosarcoma was investigated. Our results showed that miR-33b was significantly downregulated in osteosarcoma tissue and cell lines. Overexpression of miR-33b significantly inhibited cell proliferation, migration, and invasion in the MG-63 osteosarcoma cell line. Moreover, we also showed that c-Myc was negatively regulated by miR-33b at the posttranscriptional level, via a specific target site within the 3'UTR. Overexpression of c-Myc impaired miR-33b-induced inhibition of proliferation and invasion in osteosarcoma cells. The expression of c-Myc was frequently downregulated in osteosarcoma tumors and cell lines and was inversely correlated with miR-33b expression. Thus, our findings suggest that miR-33b inhibits osteosarcoma cells migration and invasion by targeting the c-Myc gene, acting as tumor suppressor. The findings of this study contribute to current understanding of the functions of miR-33b in osteosarcoma.
authors.affiliation: Department of Orthopedic Surgery, The First Affiliated Hospital of Harbin Medical University, No. 23, Youzheng St, Nangang, Harbin, Heilongjiang, China.
authors.forename: Ning
authors.initials: N
authors.lastname: Xu
authors.affiliation: Department of Orthopedic Surgery, The First Affiliated Hospital of Harbin Medical University, No. 23, Youzheng St, Nangang, Harbin, Heilongjiang, China.
authors.forename: Zimu
authors.initials: Z
authors.lastname: Li
authors.affiliation: Department of Orthopedic Surgery, The First Affiliated Hospital of Harbin Medical University, No. 23, Youzheng St, Nangang, Harbin, Heilongjiang, China.
authors.forename: Zhange
authors.initials: Z
authors.lastname: Yu
authors.affiliation: Department of Orthopedic Surgery, The First Affiliated Hospital of Harbin Medical University, No. 23, Youzheng St, Nangang, Harbin, Heilongjiang, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Yan
authors.affiliation: Department of Orthopedic Surgery, The First Affiliated Hospital of Harbin Medical University, No. 23, Youzheng St, Nangang, Harbin, Heilongjiang, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Orthopedic Surgery, The First Affiliated Hospital of Harbin Medical University, No. 23, Youzheng St, Nangang, Harbin, Heilongjiang, China.
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Lu
authors.affiliation: Department of Orthopedic Surgery, The First Affiliated Hospital of Harbin Medical University, No. 23, Youzheng St, Nangang, Harbin, Heilongjiang, China.
authors.forename: Weiliang
authors.initials: W
authors.lastname: Yang
mesh_terms: D020413:3' Untranslated Regions; D002460:Cell Line; D045744:Cell Line, Tumor; D002465:Cell Movement; D049109:Cell Proliferation; D015536:Down-Regulation; D006801:Humans; D035683:MicroRNAs / Q000235:genetics*; D009361:Neoplasm Invasiveness; D012516:Osteosarcoma / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D016271:Proto-Oncogene Proteins c-myc / Q000235:genetics / Q000378:metabolism*
chemical_list: D020413:3' Untranslated Regions; C550416:MIRN33a microRNA, human; D035683:MicroRNAs; D016271:Proto-Oncogene Proteins c-myc