Cell death by oxidative stress and ascorbic acid regeneration in human neuroectodermal cell lines

V. De Laurenzi, G. Melino, I. Savini, M. Annicchiarico-Petruzzelli, A. Finazzi-Agrò, L. Avigliano

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we show that human neuroectodermal cells exposed to 1-5 mM hydrogen peroxide or 10 nM-1 mM ascorbate die by programmed cell death induced by oxidative stress. The cell death by peroxide occurs within 4 h and involves approximately 80% of B-mel melanoma cells, while ascorbate causes cell death of approximately 86% of B-mel cells within 24 h. SK-N-BE(2) neuroblastoma cells are more resistant, 32% and 43% cell death for peroxide and ascorbate, respectively. In all cases, cell death causes hypodiploic DNA staining, evaluated by flow cytometry. Both cell lines can efficiently metabolise ascorbate due to significant levels of NADH-dependent semidehydroascorbate reductase and glutathione-dependent dehydroascorbate reductase. The cell death observed suggests a pro-oxidant, rather than anti-oxidant, role for ascorbic acid at physiological concentrations under these experimental conditions.

Original languageEnglish
Pages (from-to)463-466
Number of pages4
JournalEuropean Journal of Cancer
Volume31
Issue number4
DOIs
Publication statusPublished - 1995

Keywords

  • apoptosis
  • ascorbic acid
  • cell death
  • hydrogen peroxide
  • melanoma
  • neuroblastoma

ASJC Scopus subject areas

  • Cancer Research
  • Oncology
  • Hematology

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