Frontiers in Oncology (Apr 2022)

lncRNA PRADX is a Mesenchymal Glioblastoma Biomarker for Cellular Metabolism Targeted Therapy

  • Can Xu,
  • Can Xu,
  • Jixing Zhao,
  • Jixing Zhao,
  • Jia Song,
  • Jia Song,
  • Menglin Xiao,
  • Menglin Xiao,
  • Xiaoteng Cui,
  • Xiaoteng Cui,
  • Lei Xin,
  • Lei Xin,
  • Jianglong Xu,
  • Jianglong Xu,
  • Yuhao Zhang,
  • Yuhao Zhang,
  • Kaikai Yi,
  • Kaikai Yi,
  • Biao Hong,
  • Biao Hong,
  • Fei Tong,
  • Fei Tong,
  • Shaohui Tian,
  • Shaohui Tian,
  • Yanli Tan,
  • Yanli Tan,
  • Chunsheng Kang,
  • Chunsheng Kang,
  • Chuan Fang,
  • Chuan Fang

DOI
https://doi.org/10.3389/fonc.2022.888922
Journal volume & issue
Vol. 12

Abstract

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Glioblastoma (GBM) is the most common and lethal type of primary malignant central nervous system (CNS) tumor with an extremely poor prognosis, and the mesenchymal subtype of GBM has the worst prognosis. Here, we found that lncRNA PRADX was overexpressed in the mesenchymal GBM and was transcriptionally regulated by RUNX1-CBFβ complex, overexpressed PRADX suppressed BLCAP expression via interacting with EZH2 and catalyzing trimethylation of lysine 27 on histone H3 (H3K27me3). Moreover, we showed that BLCAP interacted with STAT3 and reduced STAT3 phosphorylation, overexpressed PRADX activated STAT3 phosphorylation, and promoted ACSL1 expression via suppressing BLCAP expression, accelerating tumor metabolism. Finally, we determined that combined of ACSL1 and CPT1 inhibitors could reverse the accelerated cellular metabolism and tumor growth induced by PRADX overexpression in vivo and in vitro. Collectively, PRADX/PRC2 complex activated the STAT3 pathway and energy metabolism in relation to mesenchymal GBM progression. Furthermore, our findings provided a novel therapeutic strategy targeting the energy metabolism activity of GBM.

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