Journal
MOLECULAR ASPECTS OF MEDICINE
Volume 30, Issue 1-2, Pages 13-28Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mam.2008.08.004
Keywords
Glutathione; Glutathione transporters; Multidrug resistance-associated proteins; Thiol-redox status; Apoptosis; Xenobiotic export; Signaling; Cell proliferation and differentiation
Funding
- National Institute of Health [DK48823, DK67214]
- NIEHS Center [ES01247, ES03828]
- Environmental Toxicology Training [ES07026]
Ask authors/readers for more resources
Reduced glutathione (GSH) is critical for many cellular processes, and both its intracellular and extracellular concentrations are tightly regulated. Intracellular GSH levels are regulated by two main mechanisms: by adjusting the rates of synthesis and of export from cells. Some of the proteins responsible for GSH export from mammalian cells have recently been identified, and there is increasing evidence that these GSH exporters are multispecific and multifunctional, regulating a number of key biological processes. In particular, some of the multidrug resistance-associated proteins (Mrp/Abcc) appear to mediate GSH export and homeostasis. The Mrp proteins mediate not only GSH efflux, but they also export oxidized glutathione derivatives (e.g., glutathione disulfide (GSSG), S-nitrosoglutathione (GS-NO), and glutathione-metal complexes), as well as other glutathione S-conjugates. The ability to export both GSH and oxidized derivatives of GSH, endows these transporters with the capacity to directly regulate the cellular thiol-redox status, and therefore the ability to influence many key signaling and biochemical pathways. Among the many processes that are influenced by the GSH transporters are apoptosis, cell proliferation, and cell differentiation. This report summarizes the evidence that Mrps contribute to the regulation of cellular GSH levels and the thiol-redox state, and thus to the many biochemical processes that are influenced by this tripeptide. (C) 2008 Elsevier Ltd. All rights reserved
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available