Tumor treating fields inhibit glioblastoma cell migration, invasion and angiogenesis

Eun Ho Kim, Hyo Sook Song, Seung Hoon Yoo, Myonggeun Yoon

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Treatment with alternating electric fields at an intermediate frequency (100-300 kHz), referred to as tumor treating fields (TTF) therapy, inhibits cancer cell proliferation. In the present study, we demonstrated that TTF application suppressed the metastatic potential of U87 and U373 glioblastoma cell lines via the NF-kB, MAPK and PI3K/AKT signaling pathways. Wound-healing and transwell assays showed that TTF suppressed cell migration and invasion compared with controls. Soft agar and three-dimensional culture assays showed that TTF inhibited both anchoragedependent (cell proliferation) and anchorage-independent (colony formation) GBM cell growth. TTF dysregulated epithelial-to-mesenchymal transition-related genes, such as vimentin and E-cadherin, which partially accounted for TTF inhibition of cell migration and invasion. We further demonstrated that TTF application suppressed angiogenesis by downregulating VEGF, HIF1a and matrix metalloproteinases 2 and 9. TTF also inhibited NF-kB transcriptional activity. Collectively, our findings show that TTF represents a promising novel anti-invasion and anti-angiogenesis therapeutic strategy for use in GBM patients.

Original languageEnglish
Pages (from-to)65125-65136
Number of pages12
JournalOncotarget
Volume7
Issue number40
DOIs
Publication statusPublished - 2016

Keywords

  • Angiogenesis
  • Glioblastoma multiforme
  • Metastasis
  • NF-kB
  • Tumor treating fields

ASJC Scopus subject areas

  • Oncology

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