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Thijssen, Victor LJL; Paulis, Yvette WJ; Nowak‐Sliwinska, Patrycja; Deumelandt, Katrin L; Hosaka, Kayoko; Soetekouw, Patricia MMB; Cimpean, Anca M; Raica, Marius; Pauwels, Patrick; van den Oord, Joost J; Tjan‐Heijnen, Vivianne CG; Hendrix, Mary J; Heldin, Carl‐Henrik; Cao, Yihai; Griffioen, Arjan W
Journal of pathology, December 2018, Letnik: 246, Številka: 4Journal Article
Aggressive tumor cells can adopt an endothelial cell‐like phenotype and contribute to the formation of a tumor vasculature, independent of tumor angiogenesis. This adoptive mechanism is referred to as vascular mimicry and it is associated with poor survival in cancer patients. To what extent tumor cells capable of vascular mimicry phenocopy the angiogenic cascade is still poorly explored. Here, we identify pericytes as important players in vascular mimicry. We found that pericytes are recruited by vascular mimicry‐positive tumor cells in order to facilitate sprouting and to provide structural support of the vascular‐like networks. The pericyte recruitment is mediated through platelet‐derived growth factor (PDGF)‐B. Consequently, preventing PDGF‐B signaling by blocking the PDGF receptors with either the small tyrosine kinase inhibitor imatinib or blocking antibodies inhibits vascular mimicry and tumor growth. Collectively, the current study identifies an important role for pericytes in the formation of vascular‐like structures by tumor cells. Moreover, the mechanism that controls the pericyte recruitment provides therapeutic opportunities for patients with aggressive vascular mimicry‐positive cancer types. © 2018 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of Pathological Society of Great Britain and Ireland.
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in: SICRIS
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