Journal
LEUKEMIA RESEARCH
Volume 31, Issue 6, Pages 805-815Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.leukres.2006.09.016
Keywords
hyperbaric oxygen; leukemia; multiple myeloma; oxidative stress; apoptosis; p38 mitogen activated protein kinase
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Tumor cells with different origins have different threshold to apoptosis. Hematopoietic (Jurkat, NCl-H929) cells and non-hematopoietic (A549, MCF-7) cells were received hyperbaric oxygen (HBO2) treatment from 2.5 to 3.5 atmosphere absolute (ATA) of 100% oxygen for 6 h, and a significant percentage of apoptosis were shown only in hematopoietic Jurkat and NCI-H929 cells by either Annexin V or TUNEL assay. Oxidative stress was illustrated higher in HBO2-treated hematopoietic cells by superoxide fluorochrome detectors. HBO2 treatment leads to caspase-3. caspase-7 activation and further cleavage of PARP within cells. Furthermore, the increased phosphorylation of p38 MAPK was demonstrated in both Jurkat and NCI-H929 cells. (c) 2006 Elsevier Ltd. All rights reserved.
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