title: Natural heme oxygenase-1 inducers in hepatobiliary function.
abstract: Many physiological effects of natural antioxidants, their extracts or their major active components, have been reported in recent decades. Most of these compounds are characterized by a phenolic structure, similar to that of alpha-tocopherol, and present antioxidant properties that have been demonstrated both in vitro and in vivo. Polyphenols may increase the capacity of endogenous antioxidant defences and modulate the cellular redox state. Changes in the cellular redox state may have wide-ranging consequences for cellular growth and differentiation. The majority of in vitro and in vivo studies conducted so far have attributed the protective effect of bioactive polyphenols to their chemical reactivity toward free radicals and their capacity to prevent the oxidation of important intracellular components. However, in recent years a possible novel aspect in the mode of action of these compounds has been suggested; that is, the ultimate stimulation of the heme oxygenase-1 (HO-1) pathway is likely to account for the established and powerful antioxidant/anti-inflammatory properties of these polyphenols. The products of the HO-catalyzed reaction, particularly carbon monoxide (CO) and biliverdin/bilirubin have been shown to exert protective effects in several organs against oxidative and other noxious stimuli. In this context, it is interesting to note that induction of HO-1 expression by means of natural compounds contributes to protection against liver damage in various experimental models. The focus of this review is on the significance of targeted induction of HO-1 as a potential therapeutic strategy to protect the liver against various stressors in several pathological conditions.
authors.affiliation: Department of Biological Chemistry, Medical Chemistry and Molecular Biology, University of Catania, Viale Andrea Doria, 6, Catania 95125, Italy. livolti@unict.it
authors.forename: Giovanni
authors.initials: G
authors.lastname: Li Volti
authors.forename: David
authors.initials: D
authors.lastname: Sacerdoti
authors.forename: Claudia
authors.initials: C
authors.lastname: Di Giacomo
authors.forename: Maria-Luisa
authors.initials: ML
authors.lastname: Barcellona
authors.forename: Antonio
authors.initials: A
authors.lastname: Scacco
authors.forename: Paolo
authors.initials: P
authors.lastname: Murabito
authors.forename: Antonio
authors.initials: A
authors.lastname: Biondi
authors.forename: Francesco
authors.initials: F
authors.lastname: Basile
authors.forename: Diego
authors.initials: D
authors.lastname: Gazzolo
authors.forename: Raul
authors.initials: R
authors.lastname: Abella
authors.forename: Alessandro
authors.initials: A
authors.lastname: Frigiola
authors.forename: Fabio
authors.initials: F
authors.lastname: Galvano
mesh_terms: D000818:Animals; D000893:Anti-Inflammatory Agents / Q000737:chemistry / Q000494:pharmacology*; D000975:Antioxidants / Q000737:chemistry / Q000494:pharmacology*; D001659:Biliary Tract / Q000187:drug effects* / Q000201:enzymology; D004790:Enzyme Induction; D051547:Heme Oxygenase-1 / Q000096:biosynthesis*; D006801:Humans; D008099:Liver / Q000187:drug effects* / Q000201:enzymology; D008107:Liver Diseases / Q000201:enzymology / Q000517:prevention & control*; D015394:Molecular Structure; D028321:Plant Preparations / Q000494:pharmacology; D013329:Structure-Activity Relationship
chemical_list: D000893:Anti-Inflammatory Agents; D000975:Antioxidants; D028321:Plant Preparations; D051547:Heme Oxygenase-1