scholarly journals The Effectiveness of Glutathione Redox Status as a Possible Tumor Marker in Colorectal Cancer

2021 ◽  
Vol 22 (12) ◽  
pp. 6183
Author(s):  
Delia Acevedo-León ◽  
Lidia Monzó-Beltrán ◽  
Segundo Ángel Gómez-Abril ◽  
Nuria Estañ-Capell ◽  
Natalia Camarasa-Lillo ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Redox State ◽  
Reduced Glutathione ◽  
Redox Status ◽  
Oxidation Products ◽  
Interventional Study ◽  
Thiol Redox State ◽  
Thiol Redox ◽  
Glutathione Redox

The role of oxidative stress (OS) in cancer is a matter of great interest due to the implication of reactive oxygen species (ROS) and their oxidation products in the initiation of tumorigenesis, its progression, and metastatic dissemination. Great efforts have been made to identify the mechanisms of ROS-induced carcinogenesis; however, the validation of OS byproducts as potential tumor markers (TMs) remains to be established. This interventional study included a total of 80 colorectal cancer (CRC) patients and 60 controls. By measuring reduced glutathione (GSH), its oxidized form (GSSG), and the glutathione redox state in terms of the GSSG/GSH ratio in the serum of CRC patients, we identified significant changes as compared to healthy subjects. These findings are compatible with the effectiveness of glutathione as a TM. The thiol redox state showed a significant increase towards oxidation in the CRC group and correlated significantly with both the tumor state and the clinical evolution. The sensitivity and specificity of serum glutathione levels are far above those of the classical TMs CEA and CA19.9. We conclude that the GSSG/GSH ratio is a simple assay which could be validated as a novel clinical TM for the diagnosis and monitoring of CRC.

scholarly journals The thiol redox state of lymphoid organs is modified by immunization: Role of different immune cell populations

2008 ◽  
Vol 38 (9) ◽  
pp. 2419-2425 ◽  
Author(s):  
Patrizia Castellani ◽  
Giovanna Angelini ◽  
Laura Delfino ◽  
Andrea Matucci ◽  
Anna Rubartelli
Keyword(s):  
Redox State ◽  
Immune Cell ◽  
Lymphoid Organs ◽  
Cell Populations ◽  
Thiol Redox State ◽  
Thiol Redox

Differentiation of Sclerotinia minor depends on thiol redox state and oxidative stress

2008 ◽  
Vol 54 (1) ◽  
pp. 28-36 ◽  
Author(s):  
Nikolaos Patsoukis ◽  
Christos D. Georgiou
Keyword(s):  
Oxidative Stress ◽  
Redox State ◽  
Phytopathogenic Fungus ◽  
Sclerotinia Minor ◽  
Thiol Redox State ◽  
Sh Group ◽  
Thiol Redox ◽  
Sclerotial Differentiation ◽  
And Oxidative Stress

Sclerotial differentiation in Sclerotinia minor is associated with oxidative stress and thiol redox state. The significance of oxidative stress to sclerotial differentiation was revealed by the higher oxidative stress of S. minor compared with a nonsclerotiogenic counterpart. The effect of thiol redox state on sclerotial differentiation was shown by the antioxidant action of the thiol (-SH) group of N-acetylcysteine and cysteine and by an unknown (not antioxidant) role of glutathione (GSH) on S. minor. The nonantioxidant role of GSH was indicated by the differentiation-inhibiting and differentiation-noninhibiting actions of the GSH biosynthesis inhibitor l-buthionine-S,R-sulfoximine and the GSH biosynthesis inducer l-2-oxo-thiazolidine-4-carboxylate, respectively, and by the increase of oxidative stress they caused during the transition from the undifferentiated to differentiated state of S. minor. Moreover, N-acetylcysteine can be used as a potent nontoxic fungicide against this phytopathogenic fungus by acting as a growth-inhibiting cytotoxic oxidant and by sustaining the fungus in the undifferentiated hyphal stage, which is vulnerable to degradation by soil microorganisms.

Difference in redox status of serum and aqueous humor in senile cataract patients as monitored via the albumin thiol-redox state

2010 ◽  
Vol 54 (6) ◽  
pp. 584-588 ◽  
Author(s):  
Kenji Kawai ◽  
Tomoya Hayashi ◽  
Yukie Matsuyama ◽  
Takeshi Minami ◽  
Seiichi Era
Keyword(s):  
Aqueous Humor ◽  
Redox State ◽  
Redox Status ◽  
Senile Cataract ◽  
Thiol Redox State ◽  
Thiol Redox ◽  
Cataract Patients

scholarly journals Detecting intracellular thiol redox state in leukaemia and heterogeneous immune cell populations: An optimised protocol for digital flow cytometers

MethodsX ◽  
2018 ◽  
Vol 5 ◽  
pp. 1473-1483 ◽  
Author(s):  
Alex J. Wadley ◽  
Rhys G. Morgan ◽  
Kate J. Heesom ◽  
Paul S. Hole ◽  
Steven J. Coles
Keyword(s):  
Redox State ◽  
Immune Cell ◽  
Cell Populations ◽  
Thiol Redox State ◽  
Thiol Redox

scholarly journals Increased hepatic telomerase activity in a rat model of iron overload: A role for altered thiol redox state?

2007 ◽  
Vol 42 (2) ◽  
pp. 228-235 ◽  
Author(s):  
Kyle E. Brown ◽  
M. Meleah Mathahs ◽  
Kimberly A. Broadhurst ◽  
Mitchell C. Coleman ◽  
Lisa A. Ridnour ◽  
...  
Keyword(s):  
Iron Overload ◽  
Rat Model ◽  
Redox State ◽  
Telomerase Activity ◽  
Thiol Redox State ◽  
Thiol Redox

scholarly journals Regulatory redox state in tree seeds

2017 ◽  
Vol 86 (4) ◽  
Author(s):  
Ewelina Ratajczak ◽  
Karl Josef Dietz
Keyword(s):  
Redox State ◽  
Redox Status ◽  
Long Term Storage ◽  
Tree Seeds ◽  
Term Storage ◽  
Intermediate Seeds

Peroxiredoxins (Prx) are important regulators of the redox status of tree seeds during maturation and long-term storage. Thioredoxins (Trx) are redox transmitters and thereby regulate Prx activity. Current research is focused on the association of Trx with Prx in tree seeds differing in the tolerance to desiccation. The results will allow for better understanding the regulation of the redox status in orthodox, recalcitrant, and intermediate seeds. The findings will also elucidate the role of the redox status during the loss of viability of sensitive seeds during drying and long-term storage.

The glutathione degrading enzyme, Chac1, is required for calcium signaling in developing zebrafish: redox as an upstream activator of calcium

2019 ◽  
Vol 476 (13) ◽  
pp. 1857-1873 ◽  
Author(s):  
Shambhu Yadav ◽  
Bindia Chawla ◽  
Mohammad Anwar Khursheed ◽  
Rajesh Ramachandran ◽  
Anand Kumar Bachhawat
Keyword(s):  
Redox Potential ◽  
Calcium Signaling ◽  
Reduced Glutathione ◽  
Developmental Defects ◽  
Degrading Enzyme ◽  
Embryonic Lethal ◽  
Intracellular Glutathione ◽  
Cellular Oxidation ◽  
Glutathione Redox

Abstract Calcium signaling is essential for embryonic development but the signals upstream of calcium are only partially understood. Here, we investigate the role of the intracellular glutathione redox potential in calcium signaling using the Chac1 protein of zebrafish. A member of the γ-glutamylcyclotransferase family of enzymes, the zebrafish Chac1 is a glutathione-degrading enzyme that acts only on reduced glutathione. The zebrafish chac1 expression was seen early in development, and in the latter stages, in the developing muscles, brain and heart. The chac1 knockdown was embryonic lethal, and the developmental defects were seen primarily in the myotome, brain and heart where chac1 was maximally expressed. The phenotypes could be rescued by the WT Chac1 but not by the catalytically inactive Chac1 that was incapable of degrading glutathione. The ability of chac1 to alter the intracellular glutathione redox potential in the live animals was examined using Grx1-roGFP2. The chac1 morphants lacked the increased degree of cellular oxidation seen in the WT zebrafish. As calcium is also known to be critical for the developing myotomes, brain and heart, we further investigated if the chac1 knockdown phenotypes were a consequence of the lack of calcium signals. We observed using GCaMP6s, that calcium transients normally seen in the developing embryos were strongly attenuated in these knockdowns. The study thus identifies Chac1 and the consequent change in intracellular glutathione redox potential as important upstream activators of calcium signaling during development.

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