Journal
CRITICAL REVIEWS IN CLINICAL LABORATORY SCIENCES
Volume 53, Issue 4, Pages 253-267Publisher
TAYLOR & FRANCIS LTD
DOI: 10.3109/10408363.2015.1136259
Keywords
Glutathione; cancer; metastases; stress; neuroendocrine regulation; oncotherapy
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Funding
- MICINN (Ministerio de Ciencia e Innovacion) [SAF2009-07729, PT-010000-2010-021]
- MINECO (Ministerio de Economia y Competitividad), Spain [SAF2012-31565]
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Metastatic spread, not primary tumors, is the leading cause of cancer death. Glutathione (-glutamyl-cysteinyl-glycine, GSH) is particularly relevant in cancer cells as it is involved in regulating carcinogenic mechanisms, growth and dissemination, and multidrug and radiation resistance. Upon interaction of metastatic cells with the vascular endothelium, a high percentage of metastatic cells with high GSH levels survive the combined nitrosative and oxidative stresses elicited by the vascular endothelium. GSH release from different organs, mainly the liver, and its interorgan transport through the blood circulation to metastatic foci, promote their growth. This review focuses on the relationship among GSH and different key mechanisms that facilitate metastatic cell survival and growth, i.e. adaptive responses to stress, cell death evasion and utilization of physiological neuroendocrine mechanisms. Different strategies that are aimed at sensitizing metastases to cancer therapy by depleting metastatic cell GSH are analyzed.
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