The dark side of gamma-glutamyltransferase (GGT): Pathogenic effects of an 'antioxidant' enzyme.

Alessandro Corti, Eugenia Belcastro, Silvia Dominici, Emilia Maellaro, Alfonso Pompella

Journal: Free radical biology & medicine 2021;160():807-819

PMID: 32916278

Full Text on Elsevier Science View on PubMed

Abstract

Having long been regarded as just a member in the cellular antioxidant systems, as well as a clinical biomarker of hepatobiliary diseases and alcohol abuse, gamma-glutamyltransferase (GGT) enzyme activity has been highlighted by more recent research as a critical factor in modulation of redox equilibria within the cell and in its surroundings. Moreover, due to the prooxidant reactions which can originate during its metabolic function in selected conditions, experimental and clinical studies are increasingly involving GGT in the pathogenesis of several important disease conditions, such as atherosclerosis, cardiovascular diseases, cancer, lung inflammation, neuroinflammation and bone disorders. The present article is an overview of the laboratory findings that have prompted an evolution in interpretation of the significance of GGT in human pathophysiology.

Address: Dept. of Translational Research NTMS, University of Pisa Medical School, Italy.; Dept. of Molecular and Developmental Medicine, University of Siena, Italy.; Dept. of Translational Research NTMS, University of Pisa Medical School, Italy. Electronic address: [email protected].

DOI: 10.1016/j.freeradbiomed.2020.09.005

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MeSH Terms: Antioxidants, Humans, Neoplasms, Oxidation-Reduction, Reactive Oxygen Species, gamma-Glutamyltransferase