Fiche publication
Date publication
mars 2018
Journal
Cell reports
Auteurs
Membres identifiés du Cancéropôle Est :
Dr LANGLOIS Benoît
,
Dr OREND Gertraud
Tous les auteurs :
Keklikoglou I, Kadioglu E, Bissinger S, Langlois B, Bellotti A, Orend G, Ries CH, De Palma M
Lien Pubmed
Résumé
Resistance to antiangiogenic drugs limits their applicability in cancer therapy. Here, we show that revascularization and progression of pancreatic neuroendocrine tumors (PNETs) under extended vascular-endothelial growth factor A (VEGFA) blockade are dependent on periostin (POSTN), a matricellular protein expressed by stromal cells. Genetic deletion of Postn in RIP1-Tag2 mice blunted tumor rebounds of M2-like macrophages and αSMA stromal cells in response to prolonged VEGFA inhibition and suppressed PNET revascularization and progression on therapy. POSTN deficiency also impeded the upregulation of basic fibroblast growth factor (FGF2), an adaptive mechanism previously implicated in PNET evasion from antiangiogenic therapy. Higher POSTN expression correlated with markers of M2-like macrophages in human PNETs, and depleting macrophages with a colony-stimulating factor 1 receptor (CSF1R) antibody inhibited PNET revascularization and progression under VEGFA blockade despite continued POSTN production. These findings suggest a role for POSTN in orchestrating resistance to anti-VEGFA therapy in PNETs.
Mots clés
VEGF, anti-angiogenic therapy, pancreatic tumor, periostin, stromal cell, tumor angiogenesis, tumor-associated macrophage
Référence
Cell Rep. 2018 Mar 6;22(10):2530-2540
