Schwann cell-conditioned medium inhibits angiogenesis in vitro and in vivo

Donghui Huang, J. Lynn Rutkowski, Garrett M. Brodeur, Pauline M. Chou, Janet L. Kwiatkowski, Angela Babbo, Susan L. Cohn*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Background. Neuroblastomas are biologically heterogeneous tumors that consist of two main cell populations: neuroblastic/ganglionic cells and Schwann cells. The amount of Schwannian stroma strongly impacts prognosis. Low tumor vascularity, localized stage, and favorable outcome are associated with tumors that are Schwannian stroma-rich/stroma-dominant. Procedure. To investigate if Schwann cells play a role in inhibiting angiogenesis in neuroblastoma tumors, we examined the ability of human Schwann cell-conditioned medium to affect bFGF- and VEGF-induced endothelial cell proliferation and migration, and in vivo angiogenesis. Results. Schwann cell-conditioned medium significantly inhibited bFGF- and VEGF-induced endothelial cell proliferation and migration. This effect appears to be specific for endothelial cells as smooth muscle cell and fibroblast proliferation were not inhibited by this medium. Schwann cell-conditioned medium also inhibited in vivo angiogenesis in rat corneal assays. Conclusions. Schwann cells produce a potent inhibitor(s) of angiogenesis that may be responsible for the low level of vascularity and more benign clinical behavior of Schwannian stroma-rich/stroma-dominant neuroblastoma tumors. Studies to identify the inhibitor(s) are ongoing. (C) 2000 Wiley-Liss, Inc.

Original languageEnglish (US)
Pages (from-to)590-592
Number of pages3
JournalMedical and Pediatric Oncology
Issue number6
StatePublished - 2000


  • Angiogenesis
  • Angiogenesis inhibitor
  • Histology
  • Neuroblastoma
  • Schwann cell

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Oncology
  • Cancer Research


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