Abstract
In this study we report that expression of glioma pathogenesis-related protein 1 (GLIPR1) regulated numerous apoptotic, cell cycle, and spindle/centrosome assembly-related genes, including AURKA and TPX2, and induced apoptosis and/or mitotic catastrophe (MC) in prostate cancer (PCa) cells, including p53-mutated/deleted, androgen-insensitive metastatic PCa cells. Mechanistically, GLIPR1 interacts with heat shock cognate protein 70 (Hsc70); this interaction is associated with SP1 and c-Myb destabilization and suppression of SP1- and c-Myb-mediated AURKA and TPX2 transcription. Inhibition of AURKA and TPX2 using siRNA mimicked enforced GLIPR1 expression in the induction of apoptosis and MC. Recombinant GLIPR1-ΔTM protein inhibited AURKA and TPX2 expression, induced apoptosis and MC, and suppressed orthotopic xenograft tumor growth. Our results define a novel GLIPR1-regulated signaling pathway that controls apoptosis and/or mitotic catastrophe in PCa cells and establishes the potential of this pathway for targeted therapies.
Original language | English |
---|---|
Pages (from-to) | 484-496 |
Number of pages | 13 |
Journal | Molecular Oncology |
Volume | 7 |
Issue number | 3 |
DOIs | |
Publication status | Published - Jun 2013 |
Externally published | Yes |
Keywords
- AURKA
- C-Myb
- Glioma pathogenesis-related protein 1 (GLIPR1)
- Hsc70
- Prostate cancer
- TPX2
ASJC Scopus subject areas
- Molecular Medicine
- Genetics
- Oncology
- Cancer Research