title: MiR-142-3p functions as a potential tumor suppressor in human osteosarcoma by targeting HMGA1.
abstract: OBJECTIVE
  Mounting evidence has shown that aberrant expression of miRNAs correlates with human cancers, and that miRNAs can function as tumor suppressors or oncogenes. Here, we investigated the role and mechanism of miR-142-3p in human osteosarcoma.
  
  
  METHODS
  We used quantitative real-time RT-PCR to measure the expression of miR-142-3p in human osteosarcoma cell lines and tissues. The roles of miR-142-3p in osteosarcoma development were studied using cultured HOS, MG63 and Saos-2 cells and tumor xenograft analyses in nude mice; their target genes were also investigated.
  
  
  RESULTS
  We found that miR-142-3p was significantly downregulated in osteosarcoma cell lines and clinical specimens. Overexpression of miR-142-3p suppressed osteosarcoma cell proliferation, migration and invasion, whereas miR-142-3p knockdown increased these parameters. The xenograft mouse model also revealed the suppressive effect of miR-142-3p on tumor growth. High mobility group AT-hook 1 (HMGA1) was identified as a target of miR-142-3p. Downregulation of HMGA1 induced effects on osteosarcoma cell lines similar to those induced by miR-142-3p. In contrast, restoration of HMGA1 abrogated the effects induced by miR-142-3p up-regulation.
  
  
  CONCLUSIONS
  These results indicated that miR-142-3p may function as a tumor suppressor by targeting HMGA1 in osteosarcoma.
authors.affiliation: Department of Orthopedics, Changhai Hospital, Second Military Medical University, Shanghai, China.
authors.forename: Guoxing
authors.initials: G
authors.lastname: Xu
authors.forename: Jin
authors.initials: J
authors.lastname: Wang
authors.forename: Yixin
authors.initials: Y
authors.lastname: Jia
authors.forename: Feng
authors.initials: F
authors.lastname: Shen
authors.forename: Wensheng
authors.initials: W
authors.lastname: Han
authors.forename: Yifan
authors.initials: Y
authors.lastname: Kang
mesh_terms: D000818:Animals; D002465:Cell Movement; D049109:Cell Proliferation; D004305:Dose-Response Relationship, Drug; D015536:Down-Regulation; D016147:Genes, Tumor Suppressor; D025741:HMGA1a Protein / Q000235:genetics* / Q000378:metabolism*; D006801:Humans; D051379:Mice; D008819:Mice, Nude; D035683:MicroRNAs / Q000235:genetics / Q000378:metabolism*; D012516:Osteosarcoma / Q000378:metabolism* / Q000473:pathology; D013329:Structure-Activity Relationship; D014407:Tumor Cells, Cultured; D023041:Xenograft Model Antitumor Assays
chemical_list: C555159:MIRN142 microRNA, human; D035683:MicroRNAs; D025741:HMGA1a Protein