DJ-1 Contributes to Self-renewal of Stem Cells in the U87-MG Glioblastoma Cell Line.
Anticancer Res 2019;
39:5983-5990. [PMID:
31704823 DOI:
10.21873/anticanres.13803]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 10/10/2019] [Accepted: 10/11/2019] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM
DJ-1, an oncogenic molecule, helps to maintain somatic stem cells by reducing the intracellular level of reactive oxygen species (ROS). This study investigated the role of DJ-1 in glioma stem cells (GSCs).
MATERIALS AND METHODS
U87-MG (U87) and U251-MG (U251) glioblastoma cell lines that express wild-type and mutant p53, respectively, were used. These were cultured with DJ-1-targeting siRNA and subjected to a variety of in vitro experiments or intracranial transplantation into nude mice.
RESULTS
Knockdown of DJ-1 reduced clonogenicity only in U87 cells, which was rescued by p53 depletion. ROS accumulated in DJ-1-depleted cells, although treatment with N-acetyl cysteine, which quenches ROS, did not affect exhaustion of CSCs among U87 cells by DJ-1 knockdown. In a serial transplantation study, DJ-1 knockdown prolonged the survival of mice in secondary transplantation.
CONCLUSION
DJ-1 plays a pivotal role in maintenance of stem cell self-renewal in the U87 cell line.
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