Cell Reports (Nov 2023)

The expression profile and tumorigenic mechanisms of CD97 (ADGRE5) in glioblastoma render it a targetable vulnerability

  • Niklas Ravn-Boess,
  • Nainita Roy,
  • Takamitsu Hattori,
  • Devin Bready,
  • Hayley Donaldson,
  • Christopher Lawson,
  • Cathryn Lapierre,
  • Aryeh Korman,
  • Tori Rodrick,
  • Enze Liu,
  • Joshua D. Frenster,
  • Gabriele Stephan,
  • Jordan Wilcox,
  • Alexis D. Corrado,
  • Julia Cai,
  • Rebecca Ronnen,
  • Shuai Wang,
  • Sara Haddock,
  • Jonathan Sabio Ortiz,
  • Orin Mishkit,
  • Alireza Khodadadi-Jamayran,
  • Aris Tsirigos,
  • David Fenyö,
  • David Zagzag,
  • Julia Drube,
  • Carsten Hoffmann,
  • Fabiana Perna,
  • Drew R. Jones,
  • Richard Possemato,
  • Akiko Koide,
  • Shohei Koide,
  • Christopher Y. Park,
  • Dimitris G. Placantonakis

Journal volume & issue
Vol. 42, no. 11
p. 113374

Abstract

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Summary: Glioblastoma (GBM) is the most common and aggressive primary brain malignancy. Adhesion G protein-coupled receptors (aGPCRs) have attracted interest for their potential as treatment targets. Here, we show that CD97 (ADGRE5) is the most promising aGPCR target in GBM, by virtue of its de novo expression compared to healthy brain tissue. CD97 knockdown or knockout significantly reduces the tumor initiation capacity of patient-derived GBM cultures (PDGCs) in vitro and in vivo. We find that CD97 promotes glycolytic metabolism via the mitogen-activated protein kinase (MAPK) pathway, which depends on phosphorylation of its C terminus and recruitment of β-arrestin. We also demonstrate that THY1/CD90 is a likely CD97 ligand in GBM. Lastly, we show that an anti-CD97 antibody-drug conjugate selectively kills tumor cells in vitro. Our studies identify CD97 as a regulator of tumor metabolism, elucidate mechanisms of receptor activation and signaling, and provide strong scientific rationale for developing biologics to target it therapeutically in GBM.

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