03Jun 2023
Editorial Expression of Concern: SIRPa1 receptors interfere with the EGFRvIII signalosome to inhibit glioblastoma cell transformation and migration

Editorial Expression of Concern: SIRPa1 receptors interfere with the EGFRvIII signalosome to inhibit glioblastoma cell transformation and migration

This study investigated the impact of the signal regulatory protein α1 (SIRPα1) receptor on the epidermal growth factor receptor variant III (EGFRvIII) signalosome and associated phenotypes. The researchers found that overexpressing SIRPα1 in U87MG.EGFRvIII cells inhibited cell transformation and migration through a MAPK-dependent mechanism, independent of the phosphatidylinositol 3-kinase (PI3-K)/Akt pathway. This was associated with reduced interaction between EGFRvIII, SHP-2, Gab1, Grb2, and Sos-1 and enhanced SIRP/SHP-2 association. SIRPα1 also influenced SHP-2 phosphorylation at specific tyrosyl residues, potentially regulating Erk1/2 activity. Furthermore, SIRPα1 expression decreased focal adhesion kinase (FAK) phosphorylation and its recruitment to the EGFRvIII/Grb2/Sos-1/Gab1/SHP-2 complex. Understanding these molecular interactions may aid in developing new therapeutic targets against EGFRvIII-driven glioblastoma.

  • #oncology

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