title: Transcription factor Oct4 promotes osteosarcoma by regulating lncRNA AK055347.
abstract: Osteosarcoma is the most common primary bone tumor in children and adolescents, typically presenting with a poor prognosis. Octamer-binding transcription factor 4 (Oct4) protein, encoded by the POU class 5 homeobox 1 gene, is important in maintaining self-renewal of pluripotent stem cells, and is closely associated with cancer. However, its role in osteosarcoma remains to be elucidated. The present study observed Oct4 was markedly increased in osteosarcoma cell lines and in human osteosarcoma tissue samples. Following Oct4 downregulation by small interfering RNA (siRNA) in osteosarcoma F5M2 cells, the cells exhibited significant decreases in proliferation and invasion ability, and an increase in cell apoptosis. Notably, downregulation of Oct4 decreased the expression of AK055347, a newly identified long noncoding RNA (lncRNA) in human tissues. The downregulation of AK055347 by siRNA resulted in a significant suppressive effect on proliferative and invasive ability, and promotion of cell apoptosis in osteosarcoma cells. Thus, the current study suggests Oct4 exerts a promoting effect in osteosarcoma, and identifies a novel lncRNA in osteosarcoma progression.
authors.affiliation: Department of Orthopedics, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130001, P.R. China.
authors.forename: Hongwu
authors.initials: H
authors.lastname: Fan
authors.affiliation: Department of Orthopedics, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130001, P.R. China.
authors.forename: Guangyao
authors.initials: G
authors.lastname: Liu
authors.affiliation: Department of Orthopedics, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130001, P.R. China.
authors.forename: Changfu
authors.initials: C
authors.lastname: Zhao
authors.affiliation: Department of Anesthesiology, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130001, P.R. China.
authors.forename: Xuefeng
authors.initials: X
authors.lastname: Li
authors.affiliation: Department of Orthopedics, Orthopedics Hospital, The Second Hospital of Jilin University, Changchun, Jilin 130001, P.R. China.
authors.forename: Xiaoyu
authors.initials: X
authors.lastname: Yang
keywords: AK055347; Oct4; POU5F1; lncRNA; osteosarcoma