Abstract
Osteopontin (OPN) is the most upregulated gene in primary central nervous system lymphoma (PCNSL) compared to non-CNS diffuse large B cell lymphoma (DLBCL). We show here that OPN is a key mediator of intracerebral tumor growth, invasion, and dissemination in CNS lymphoma, and that these effects depend upon activation of NF-κB. We further show that activation of NF-κB by OPN occurs through a unique mechanism in which intracellular OPN (iOPN) causes transcriptional downregulation of the NF-κB inhibitors, A20/TNFAIP3 and ABIN1/TNIP1, and secretory OPN (sOPN) promotes receptor-mediated activation of NF-κB. We also identify NF-κB-mediated induction of matrix metalloproteinase-8 (MMP-8) as a specific feature of OPN-mediated tissue invasion. These results implicate OPN as a candidate for development of targeted therapy for patients with PCNSL.
Original language | English (US) |
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Pages (from-to) | 32156-32171 |
Number of pages | 16 |
Journal | Oncotarget |
Volume | 7 |
Issue number | 22 |
DOIs | |
State | Published - May 31 2016 |
Keywords
- CNS lymphoma
- Invasion
- NF-κB signaling
- Osteopontin (OPN)
- Proliferation
ASJC Scopus subject areas
- Oncology