Abstract
Mitochondria have emerged recently as effective targets for novel anti-cancer drugs referred to as ‘mitocans’. We propose that the molecular mechanism of induction of apoptosis by mitocans, as exemplified by the drug α-tocopheryl succinate, involves generation of reactive oxygen species (ROS). ROS then mediate the formation of disufide bridges between cytosolic Bax monomers, resulting in the formation of mitochondrial outer membrane channels. ROS also cause oxidation of cardiolipin, triggering the release of cytochrome c and its translocation via the activated Bax channels. This model may provide a general mechanism for the action of inducers of apoptosis and anticancer drugs, mitocans, targeting mitochondria via ROS production.
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