Peroxiredoxin I and II inhibit H2O2-induced cell death in MCF-7 cell lines - PubMed (original) (raw)

. 2007 Jul 1;101(4):1038-45.

doi: 10.1002/jcb.21155.

Affiliations

• PMID: 17163455
• DOI: 10.1002/jcb.21155

Peroxiredoxin I and II inhibit H2O2-induced cell death in MCF-7 cell lines

Ji-Yeon Bae et al. J Cell Biochem. 2007.

Abstract

Apoptosis is known to be induced by direct oxidative damage due to oxygen-free radicals or hydrogen peroxide or by their generation in cells by the actions of injurious agents. Together with glutathione peroxidase and catalase, peroxiredoxin (Prx) enzymes play an important role in eliminating peroxides generated during metabolism. We investigated the role of Prx enzymes during cellular response to oxidative stress. Using Prx isoforms-specific antibodies, we investigated the presence of Prx isoforms by immunoblot analysis in cell lysates of the MCF-7 breast cancer cell line. Treatment of MCF-7 with hydrogen peroxide (H2O2) resulted in the dose-dependent expressions of Prx I and II at the protein and mRNA levels. To investigate the physiologic relevance of the Prx I and II expressions induced by H2O2, we compared the survivals of MCF10A normal breast cell line and MCF-7 breast cancer cell line following exposure to H2O2. The treatment of MCF10A with H2O2 resulted in rapid cell death, whereas MCF-7 was resistant to H2O2. In addition, we found that Prx I and II transfection enabled MCF10A cells to resist H2O2-induced cell death. These findings suggest that Prx I and II have important functions as inhibitors of cell death during cellular response to oxidative stress.

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