TY - JOUR
T1 - Cell death by oxidative stress and ascorbic acid regeneration in human neuroectodermal cell lines
AU - De Laurenzi, V.
AU - Melino, G.
AU - Savini, I.
AU - Annicchiarico-Petruzzelli, M.
AU - Finazzi-Agrò, A.
AU - Avigliano, L.
PY - 1995
Y1 - 1995
N2 - 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.
AB - 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.
KW - apoptosis
KW - ascorbic acid
KW - cell death
KW - hydrogen peroxide
KW - melanoma
KW - neuroblastoma
UR - http://www.scopus.com/inward/record.url?scp=0029038769&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0029038769&partnerID=8YFLogxK
U2 - 10.1016/0959-8049(95)00059-R
DO - 10.1016/0959-8049(95)00059-R
M3 - Article
C2 - 7576946
AN - SCOPUS:0029038769
VL - 31
SP - 463
EP - 466
JO - European Journal of Cancer
JF - European Journal of Cancer
SN - 0959-8049
IS - 4
ER -