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Journal Article
Research Support, Non-U.S. Gov't
Therapeutic targets in subependymoma.
Journal of Neuroimmunology 2014 December 16
Subependymomas are usually treated with surgical resection; however, no standard, defined alternative medical therapy is recommended for patients who are not surgical candidates, owing to a paucity of molecular, immunological, and genetic characterization. To address this, an ex vivo functional analysis of the immune microenvironment in subependymoma was conducted, a subependymoma cytokine/chemokine microarray was constructed for the evaluation of operational immune and molecular pathways, and a subependymoma cell line was derived and used to test a variety of cytotoxic agents that target operational pathways identified in subependymoma. We found that immune effectors are detectable within the microenvironment of subependymoma; however, marked immune suppression is not observed. The subependymoma tissue microarrays demonstrated tumor expression of p53, MDM2, HIF-1α, topoisomerase II-β, p-STAT3, and nucleolin, but not EGFRvIII, EphA2, IL-13RA2, CMV, CTLA-4, FoxP3, PD-1, PD-L1, EGFR, PDGF-α, PDGF-β, PDGFR-α, PDGFR-β, PTEN, IGFBP2, PI3K, MDM4, IDH1, mTOR, or Jak2. A topoisomerase inhibitor (WP744, IC50=0.83 μM) and a p-STAT3/HIF-1α inhibitor (WP1066, IC50=3.15 μM) demonstrated a growth inhibition of the subependymoma cell proliferation. Cumulatively, these data suggest that those agents that interfere with oncogenes operational in subependymoma may have clinical impact.
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