ascorbic-acid has been researched along with guluronic-acid* in 2 studies
2 other study(ies) available for ascorbic-acid and guluronic-acid
| Article | Year |
|---|---|
Guluronic acid can inhibit copper(II) and amyloid - β peptide coordination and reduce copper-related reactive oxygen species formation associated with Alzheimer's disease.
Copper-related reactive oxygen species (ROS) formation can lead to neuropathologic degradation associated with Alzheimer's disease (AD) according to amyloid cascade hypothesis. A complexing agent that can selectively chelate with copper ions and capture copper ions from the complex formed by copper ions and amyloid-β (Cu - Aβ complex) may be available in reducing ROS formation. Herein, we described applications of guluronic acid (GA), a natural oligosaccharide complexing agent obtained from enzymatic hydrolysis of brown algae, in reducing copper-related ROS formation. UV-vis absorption spectra demonstrated the coordination between GA and Cu(II). Ascorbic acid consumption and coumarin-3-carboxylic acid fluorescence assays confirmed the viability of GA in reducing ROS formation in solutions containing other metal ions and Aβ. Fluorescence kinetics, DPPH radical clearance and high resolution X - ray photoelectron spectroscopy results revealed the reductivity of GA. Human liver hepatocellular carcinoma (HepG2) cell viability demonstrated the biocompatibility of GA at concentrations lower than 320 μM. Cytotoxic results of human neuroblastoma (SH-SY5Y) cells verified that GA can inhibit copper-related ROS damage in neuronal cells. Our findings, combined with the advantages of marine drugs, make GA a promising candidate in reducing copper-related ROS formation associated with AD therapy. Topics: Alzheimer Disease; Amyloid beta-Peptides; Ascorbic Acid; Copper; Humans; Neuroblastoma; Reactive Oxygen Species | 2023 |
Synthesis of alginate oligosaccharides containing L-guluronic acids.
Making ends meet: The L-gulopyranosyl trichloroacetimidate and 1,6-anhydro-2,3-di-O-benzyl-beta-L-gulopyranose, efficiently derived from L-ascorbic acid, were individually used as a starting unit and an elongation unit to prepare L-guluronic acid linked alginate oligosaccharides in excellent alpha selectivity and in good yields. Topics: Alginates; Ascorbic Acid; Carbohydrates; Glucuronic Acid; Hexuronic Acids; Oligosaccharides | 2009 |