Caffeic acid phenethyl ester preferentially enhanced radiosensitizing and increased oxidative stress in medulloblastoma cell line

Yi Yen Lee, Chung Lan Kao, Shih Hwa Chiou, Ping Hsing Tsai, Tung Hu Tsai, Wei Fong Wu, Hung Hai Ku, Tai-Tong Wong

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


Objectives: Caffeic acid phenethyl ester (CAPE), an active component of propolis, was recently reported to have radiosensitizing effects on medulloblastoma (MB) cells. However, the mechanisms of radiosensitivity involved in medulloblastoma cells are still unclear. The specific aim of this study was to investigate the role of CAPE-induced oxidative stress to influence of radiosensitivity and anti-proliferative effects in medulloblastoma cells. Materials and methods: Medulloblastoma (Daoy) cells were treated with CAPE in different concentrations and assessed for cell viability. The following were also evaluated: migratory ability, reduced glutathione (GSH) level, reactive oxygen species (ROS) level, nuclear factor-kappaB (NF-κB) activity, and apoptosis in CAPE alone, radiation alone, or radiation combined with CAPE in Daoy cells. Results: The results indicated that CAPE inhibited the growth of Daoy cells. CAPE treatment in Daoy cells could effectively decrease glutathione reductase and significantly increase glutathione peroxidase. Radiation-activated NF-κB was reversed by CAPE pretreatment. Finally, the result of terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end labeling assay showed that CAPE treatment can enhance radiation-induced apoptosis in Daoy cells. Conclusions: Our study demonstrated the anti-proliferative and radiosensitizing effects of CAPE on MB cells, which may be achievable through depleting GSH, increased ROS activity, and inhibiting NF-κB activity.

Original languageEnglish
Pages (from-to)987-994
Number of pages8
JournalChild's Nervous System
Issue number9
Publication statusPublished - May 12 2008
Externally publishedYes


  • Caffeic acid phenethyl ester (CAPE)
  • Glutathione(GSH)
  • Medulloblastoma
  • Nuclearfactor-kappaB (NF-κB)
  • Radiosensitivity
  • Reactiveoxygen species (ROS)

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Clinical Neurology


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