title: In vitro antioxidant activities of sulfated derivatives of polysaccharides extracted from Auricularia auricular.
abstract: In this research, two types of sulfated polysaccharide derivatives were successfully synthesized. Their antioxidant activities were investigated by employing various established in vitro systems. In addition, the degree of sulfation was evaluated using ion-chromatography and IR spectra. The results verify that, when employing scavenging superoxide radical tests, both the sulfation of acid Auricularia auricular polysaccharides (SAAAP) and the sulfation of neutral Auricularia auricular polysaccharides (SNAAP) derivatives possessed considerable antioxidant activity and had a more powerful antioxidant competence than that of the native non-sulfated polysaccharides (AAAP and NAAP). On the other hand, AAAP and NAAP exhibited stronger activity on scavenging both the hydroxyl radical and lipid peroxidation. Available data obtained with in vitro measurements indicates that the sulfated groups of AAAP and NAAP played an important role on antioxidant activity. In sum, the research demonstrates that the antioxidant activity of sulfated polysaccharide derivatives in vitro has a potential significance for seeking new natural antioxidant protective agents.
authors.affiliation: School of Food Science and Engineering, Harbin Institute of Technology, 73 HuangHe Road, NanGang District, Harbin 150090, China; E-Mails: zhhua@hit.edu.cn (H.Z.); ly6617@hit.edu.cn (L.Y.); yangxin@hit.edu.cn (X.Y.).
authors.forename: Hua
authors.initials: H
authors.lastname: Zhang
authors.forename: Zhen-Yu
authors.initials: ZY
authors.lastname: Wang
authors.forename: Lin
authors.initials: L
authors.lastname: Yang
authors.forename: Xin
authors.initials: X
authors.lastname: Yang
authors.forename: Xue
authors.initials: X
authors.lastname: Wang
authors.forename: Zhi
authors.initials: Z
authors.lastname: Zhang
mesh_terms: D000975:Antioxidants / Q000737:chemistry* / Q000302:isolation & purification; D001487:Basidiomycota / Q000737:chemistry*; D000077286:Cetrimonium; D002593:Cetrimonium Compounds; D002850:Chromatography, Gel; D002851:Chromatography, High Pressure Liquid; D017665:Hydroxyl Radical / Q000737:chemistry; D015227:Lipid Peroxidation; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification; D017550:Spectroscopy, Fourier Transform Infrared; D013455:Sulfur / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D002593:Cetrimonium Compounds; D011134:Polysaccharides; D017665:Hydroxyl Radical; D013455:Sulfur; D000077286:Cetrimonium