title: Rhodiola rosea ability to enrich cellular antioxidant defences of cultured human keratinocytes.
abstract: Keratinocytes are cells strongly exposed to oxidative stress, but normally good equipped for antioxidant responses. However, it has long been suggested that exogenous antioxidants could play a useful role in minimizing the adverse skin responses associated with such oxidant species. In this work it was paid attention to the extract of Rhodiola rosea L. roots by using the phytocomplex as a whole because of the important activity of its composition and mutual distribution of its components. We have measured the protection afforded by the extract to reduced glutathione levels, glyceraldehyde-3-phosphate dehydrogenase activity, and thiobarbituric acid reactive substances levels in cultured human keratinocytes (NCTC 2544) exposed to different oxidative insults: Fe(II)/ascorbate, Fe(II)/H(2)O(2), and tert-butyl-hydroperoxide. We also have investigated the influence of the R. rosea extract on the production of intracellular reactive oxygen species and on the activity of antioxidant enzymes (catalase, superoxide dismutase, glutathione peroxidase, and glutathione reductase). Furthermore, we have demonstrated that R. rosea extract was able to increase in a time- and dose-dependent manner the activity of the trans plasma membrane oxido reductase activity as an indirect evaluation of the intracellular redox status and this effect was already evident with small concentration of the extract and in a long time. As a result, NCTC 2544 are able to better counteract to several oxidative insults if incubated with R. rosea extract demonstrating a very good antioxidant activity of this phytocomplex.
authors.affiliation: Istituto di Chimica Biologica Giorgio Fornaini, Università degli Studi di Urbino Carlo Bo, Via A. Saffi 2, Urbino, PU, Italy.
authors.forename: Cinzia
authors.initials: C
authors.lastname: Calcabrini
authors.forename: Roberta
authors.initials: R
authors.lastname: De Bellis
authors.forename: Umberto
authors.initials: U
authors.lastname: Mancini
authors.forename: Luigi
authors.initials: L
authors.lastname: Cucchiarini
authors.forename: Lucia
authors.initials: L
authors.lastname: Potenza
authors.forename: Roberta
authors.initials: R
authors.lastname: De Sanctis
authors.forename: Vania
authors.initials: V
authors.lastname: Patrone
authors.forename: Carla
authors.initials: C
authors.lastname: Scesa
authors.forename: Marina
authors.initials: M
authors.lastname: Dachà
mesh_terms: D000975:Antioxidants / Q000494:pharmacology*; D002374:Catalase / Q000378:metabolism; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D005978:Glutathione / Q000378:metabolism; D005979:Glutathione Peroxidase / Q000378:metabolism; D005980:Glutathione Reductase / Q000378:metabolism; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases / Q000378:metabolism; D006801:Humans; D015603:Keratinocytes / Q000187:drug effects* / Q000378:metabolism; D016877:Oxidants / Q000494:pharmacology; D010084:Oxidation-Reduction; D018384:Oxidative Stress / Q000187:drug effects*; D010936:Plant Extracts / Q000494:pharmacology*; D018517:Plant Roots; D017382:Reactive Oxygen Species / Q000378:metabolism; D029771:Rhodiola; D013482:Superoxide Dismutase / Q000378:metabolism; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism; D013997:Time Factors; D015854:Up-Regulation
chemical_list: D000975:Antioxidants; D016877:Oxidants; D010936:Plant Extracts; D017382:Reactive Oxygen Species; D017392:Thiobarbituric Acid Reactive Substances; D002374:Catalase; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases; D005980:Glutathione Reductase; D005978:Glutathione