Abstract
THE proto-oncogene bcl-2, isolated from the t(14;18) chromosomal breakpoint in follicular B-lymphoma1–3, and abcl-2-related gene bcl-x (ref. 4) prevent apoptotic cell death induced by various treatments5–8. Although a mechanism has been proposed that involves Bcl-2 activity on reactive oxygen species (ROS)9,10, expression of Bcl-2 or Bcl-xL prevents cell death induced by withdrawal of oxygen (hypoxia), which drastically decreases the net formation of oxygen free radicals and does not increase oxidized lipid, protein or DNA. Furthermore, neither ROS scavenger nor inhibitor of ROS scavenger affects cell death, regardless of the expression of Bcl-2 or Bcl-xL. Thus our data suggest that Bcl-2 and Bcl-xL exert an anti-cell death function by a mechanism other than regulation of ROS activity.
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Shimizu, S., Eguchi, Y., Kosaka, H. et al. Prevention of hypoxia-induced cell death by Bcl-2 and Bcl-xL. Nature 374, 811–813 (1995). https://doi.org/10.1038/374811a0
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DOI: https://doi.org/10.1038/374811a0
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