title: Increased expression of lncRNA HULC indicates a poor prognosis and promotes cell metastasis in osteosarcoma.
abstract: BACKGROUND
  Long non-coding RNAs (lncRNAs) are aberrantly expressed in many diseases including cancer. LncRNA HULC (highly up-regulated in liver cancer) has recently been revealed to be involved in hepatocellular carcinoma development and progression. However, the role and function of HULC in human osteosarcoma remains unknown.
  
  
  METHODS
  LncRNA HULC expression in osteosarcoma tissues and cell lines was detected by quantitative real-time PCR. Then, the association of HULC level with survival of osteosarcoma patients was performed by the Kaplan-Meier and Cox proportional regression analyses. Furthermore, the effects of HULC on tumorigenicity of osteosarcoma cells were evaluated by in vitro assays.
  
  
  RESULTS
  In the present study, we demonstrated that HULC was significantly up-regulated in osteosarcoma tissues and cell lines compared with normal controls, and over-expression of HULC was correlated with clinical stage and distant metastasis. Moreover, higher HULC expression was associated with shorter overall survival of osteosarcoma patients. Furthermore, decreased expression of HULC markedly suppressed osteosarcoma cell proliferation, migration, and invasion.
  
  
  CONCLUSIONS
  Our results indicated that HULC is a novel molecule involved in osteosarcoma progression, which may provide a new marker of poor prognosis and a potential therapeutic target for osteosarcoma intervention.
authors.affiliation: Department of Orthopedics, The First Affiliated Hospital of Xinxiang Medical University Weihui 453100, China.
authors.forename: Xiao-Hui
authors.initials: XH
authors.lastname: Sun
authors.affiliation: Department of Orthopedics, The First Affiliated Hospital of Xinxiang Medical University Weihui 453100, China.
authors.forename: Li-Bin
authors.initials: LB
authors.lastname: Yang
authors.affiliation: Department of Orthopedics, The First Affiliated Hospital of Xinxiang Medical University Weihui 453100, China.
authors.forename: Xiao-Lin
authors.initials: XL
authors.lastname: Geng
authors.affiliation: Hemodialysis Room, The Third Affiliated Hospital of Xinxiang Medical University Xinxiang, 453000, China.
authors.forename: Ran
authors.initials: R
authors.lastname: Wang
authors.affiliation: Department of Orthopedics, The First Affiliated Hospital of Xinxiang Medical University Weihui 453100, China.
authors.forename: Zhi-Chang
authors.initials: ZC
authors.lastname: Zhang
mesh_terms: D000293:Adolescent; D000328:Adult; D001859:Bone Neoplasms / Q000235:genetics* / Q000401:mortality / Q000473:pathology; D002648:Child; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D009361:Neoplasm Invasiveness; D009362:Neoplasm Metastasis; D012516:Osteosarcoma / Q000235:genetics* / Q000401:mortality / Q000473:pathology; D011379:Prognosis; D016016:Proportional Hazards Models; D062085:RNA, Long Noncoding / Q000096:biosynthesis / Q000235:genetics*; D034741:RNA, Small Interfering; D060888:Real-Time Polymerase Chain Reaction; D014162:Transfection; D055815:Young Adult
chemical_list: C574685:HULC long non-coding RNA, human; D062085:RNA, Long Noncoding; D034741:RNA, Small Interfering
keywords: HULC; Osteosarcoma; long non-coding RNAs; overall survival