title: Antioxidant Properties of Oak Bracket Mushroom, Pseudoinonotus dryadeus (Higher Basidiomycetes): A Mycochemical Study.
abstract: A complex mixture of free fatty acids (1), cerevisterol (2), a sphingosine (3), and a complex mixture of diacylglycerophospholipids (4) were isolated from the fruiting body of the basidiomycete mushroom Pseudoinonotus dryadeus and subjected to spectroscopic analyses. The antioxidant activities of the whole extract of the fungus, of the isolated fractions, and of compounds 1-4 were evaluated in two in vitro model systems: 2,2-diphenyl-1-picryl-hydrazyl (DPPH) and superoxide anion. In each systems, the extract of fungus and compound 2 showed the same free radical scavenging activity (with SC50 data of 18.27 µg/mL and 5.75 µg/mL, respectively) compared with the positive control quercetin (DPPH assay). Compounds 1-4 were isolated from P. dryadeus for the first time.
authors.affiliation: Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy.
authors.forename: Francesca
authors.initials: F
authors.lastname: Cateni
authors.affiliation: Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy.
authors.forename: Marina
authors.initials: M
authors.lastname: Zacchigna
authors.affiliation: University of Chieti-Pescara, Chieti, Italy.
authors.forename: Tiziano
authors.initials: T
authors.lastname: Altieri
authors.affiliation: Department of Chemical and Pharmaceutical Sciences, University of Trieste, Trieste, Italy.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Procida
authors.affiliation: Laboratory of Commodity Sciences, DEC, University of Chieti-Pescara, Pescara, Italy.
authors.forename: Angelo
authors.initials: A
authors.lastname: Cichelli
mesh_terms: D000975:Antioxidants / Q000737:chemistry / Q000494:pharmacology*; D001487:Basidiomycota / Q000737:chemistry*; D005591:Chemical Fractionation
chemical_list: D000975:Antioxidants