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- W2055849442 abstract "Motexafin gadolinium (MGd, Xcytrin®) is an aromatic macrocycle that has a strong affinity for electrons, i.e., it is easily reduced. In the presence of oxygen, MGd accepts electrons from various cellular reducing metabolites and forms superoxide and other reactive oxygen species (ROS) by redox cycling. The reaction with NADPH is dramatically accelerated by various oxido-reductases including thioredoxin reductase. In vitro studies with various cancer cell lines have shown an increase in ROS and intracellular free zinc in cells treated with MGd. MGd increases cytotoxicity of ionizing radiation and various chemotherapy agents and may be directly cytotoxic to tumor cells under certain conditions. MGd selectively localizes in tumors, perhaps due to their metabolic perturbations. MGd treatment in murine models enhances tumor response to radiation and chemotherapy agents. In controlled, randomized clinical trials, combining MGd treatment with ionizing radiation improves time to neurologic progression in lung cancer patients with brain metastases. The molecular target for MGd appears to be thioredoxin reductase which, when inhibited, results in cellular redox stress, cytotoxicity and an increase in tumor responsiveness to a variety of treatments." @default.
- W2055849442 created "2016-06-24" @default.
- W2055849442 creator A5076423139 @default.
- W2055849442 creator A5091913369 @default.
- W2055849442 date "2006-12-01" @default.
- W2055849442 modified "2023-10-14" @default.
- W2055849442 title "Motexafin gadolinium: A novel redox active drug for cancer therapy" @default.
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- W2055849442 doi "https://doi.org/10.1016/j.semcancer.2006.09.002" @default.
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