title: Characteristics of Se-enriched mycelia by Stropharia rugoso-annulata and its antioxidant activities in vivo.
abstract: Selenium (Se) is an essential trace element for humans and animals. Stropharia rugoso-annulata is a nutritional and functional mushroom containing many kinds of bioactive ingredients. The aims of this study were to investigate the Se-enrichment characteristics of S. rugoso-annulata in submerged culture and evaluate the antioxidant activities of Se-enriched mycelia in vivo in terms of the values of glutathione peroxidase (GSH-Px), superoxide dismutase (SOD), and malondialdehyde (MDA). The optimum parameters of Se-enrichment under the optimal Se concentration (150 microg/mL) in media were as follows: biomass 8.11 +/- 0.25 g/L, Se content in mycelia 4,727.68 +/- 13 microg/g, Se-accumulated rate 24.68 +/- 1.67%, and percentage of organic Se 96.27 +/- 3.26%. The mainly subsistent forms of selenium in Se-enriched mycelia were selenoprotein and selenium-polysaccharide. The contents of total amino acids (TAA) and essential amino acids (EAA) in Se-enriched mycelia were increased by 13.5 +/- 1.09% and 12.8 +/- 0.89%, respectively. It was efficient for Se-enriched mycelia to elevate GSH-Px and SOD activities and decrease MDA content. These results indicated that Se-enriched mycelia of S. rugoso-annulata represent a novel dietary source of bioavailable supplemental selenium.
authors.affiliation: College of Life Sciences, Shandong Agricultural University, Taian, Shandong, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Song
authors.forename: Le
authors.initials: L
authors.lastname: Jia
authors.forename: Feng
authors.initials: F
authors.lastname: Xu
authors.forename: Fanyun
authors.initials: F
authors.lastname: Meng
authors.forename: Peng
authors.initials: P
authors.lastname: Deng
authors.forename: Keming
authors.initials: K
authors.lastname: Fan
authors.forename: Xiaonan
authors.initials: X
authors.lastname: Liu
mesh_terms: D000363:Agaricales / Q000187:drug effects* / Q000378:metabolism; D000975:Antioxidants / Q000494:pharmacology*; D005979:Glutathione Peroxidase / Q000378:metabolism; D008315:Malondialdehyde / Q000378:metabolism; D025282:Mycelium / Q000187:drug effects* / Q000378:metabolism; D012643:Selenium / Q000494:pharmacology*; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D000975:Antioxidants; D008315:Malondialdehyde; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D012643:Selenium