Evaluation of Salicornia herbacea as a potential antioxidant and anti-inflammatory agent.
In this study, the antioxidant and anti-inflammatory activities of Salicornia herbacea were evaluated. The crude CH(2)Cl(2)/methanol extract of S. herbacea showed 52% and 86% scavenging activities of the authentic ONOO(-) and ONOO(-) from 3-morpholinosydnomimine (SIN-1) at a concentration of 50 microg/mL, respectively, and was subjected to a further fractionation with n-hexane, 85% aqueous methanol, n-butanol, and water. Additional purification of the n-butanol fraction revealed that the most potent scavenging activity led to the isolation of isorhamnetin 3-O-beta-d-glucopyranoside as the active principle. The structure of isorhamnetin 3-O-beta-d-glucopyranoside was elucidated by extensive two-dimensional nuclear magnetic resonance experiments such as (1)H correlation spectroscopy nuclear Overhauser effect spectroscopy, heteronuclear single quantum correlation, and heteronuclear multiple-bond correlation as well as by comparison with the published spectral data. Isorhamnetin 3-O-beta-d-glucopyranoside exhibited dose-dependent scavenging activities of the authentic ONOO(-) and ONOO(-) from SIN-1. The electron spin resonance spin-trap techniques confirmed that reactive oxygen species, including the hydroxyl, superoxide, carbon-centered, and 1,1-diphenyl-2-picrylhydrazyl radicals, were actively quenched by addition of isorhamnetin 3-O-beta-d-glucopyranoside. In addition, isorhamnetin 3-O-beta-d-glucopyranoside suppressed the lipopolysaccharide-induced nitric oxide production and the expression of cytokines such as inducible nitric oxide synthase, tumor necrosis factor-alpha, and interleukin-1beta in Raw 264.7 cells. Findings from this study should underscore the nutraceutical value of S. herbacea-derived isorhamnetin 3-O-beta-d-glucopyranoside as a potent antioxidative and anti-inflammatory agent via alleviation of radical-induced toxicities and pro-inflammatory responses.
Kim
You Ah
YA
Korea Maritime University, Busan, Republic of Korea.
Kong
Chang-Suk
CS
Um
Young Ran
YR
Lim
Sun-Young
SY
Yea
Sung Su
SS
Seo
Youngwan
Y
D000893:Anti-Inflammatory Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D019663:Chenopodiaceae / Q000737:chemistry*; D016207:Cytokines / Q000037:antagonists & inhibitors; D044948:Flavonols / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D008070:Lipopolysaccharides; D015394:Molecular Structure; D009569:Nitric Oxide / Q000037:antagonists & inhibitors; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D017382:Reactive Oxygen Species / Q000378:metabolism
D000893:Anti-Inflammatory Agents; D000975:Antioxidants; D016207:Cytokines; D044948:Flavonols; D008070:Lipopolysaccharides; D010936:Plant Extracts; D017382:Reactive Oxygen Species; D009569:Nitric Oxide; C432511:isorhamnetin 3-O-glucoside