Methylation of HSP70 Orchestrates Its Binding to and Stabilization of BCL2 mRNA and Renders Pancreatic Cancer Cells Resistant to Therapeutics.

Cancer Research
Liang WangKeping Xie

Abstract

Pancreatic cancer is a lethal disease owing to its intrinsic and acquired resistance to therapeutic modalities. The altered balance between pro- and antiapoptosis signals within cancer cells is critical to therapeutic resistance. However, the molecular mechanisms underlying increased antiapoptosis signals remain poorly understood. In this study, we report that PRMT1 expression is increased in pancreatic cancer tissues and is associated with higher tumor grade, increased aggressiveness, and worse prognosis. PRMT1 overexpression increased arginine methylation of HSPs of 70 kDa (HSP70); this methylation enhanced HSP70 binding and stabilization of BCL2 mRNA through AU-rich elements in 3'-untranslated region and consequentially increased BCL2 protein expression and protected cancer cells from apoptosis induced by cellular stresses and therapeutics. RNA binding and regulation function of HSP70 was involved in pancreatic cancer drug resistance and was dependent on protein arginine methylation. These findings not only reveal a novel PRMT1-HSP70-BCL2 signaling axis that is crucial to pancreatic cancer cell survival and therapeutic resistance, but they also provide a proof of concept that targeted inhibition of this axis may represent a ...Continue Reading

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Citations

Mar 21, 2021·Nature Reviews. Drug Discovery·Qin WuDalia Barsyte-Lovejoy
Aug 3, 2020·Cytokine & Growth Factor Reviews·Victoria Katie XieKeping Xie
Apr 10, 2021·Frontiers in Cellular Neuroscience·Anna L GillFernando G Vieira
May 20, 2021·Experimental & Molecular Medicine·Jee Won HwangYong Kee Kim
May 7, 2021·Endocrine Reviews·Lucie MalbeteauMuriel Le Romancer

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