title: Design, synthesis and evaluation of 3,4-dihydroxybenzoic acid derivatives as antioxidants, bio-metal chelating agents and acetylcholinesterase inhibitors.
abstract: Metal ions, especially copper, zinc and iron, play an important role in the neurodegeneration process because they can affect protein misfolding, leading to the formation of the amyloid deposits and oxidative stress leading to reactive oxygen species (ROS). Here we report the synthesis and evaluation as antioxidant and metal chelating agents of 3,4-dihydroxybenzoic acid derivatives. Synthesized compounds were tested by the 2,2-diphenyl-2-picrylhydrazyl (DPPH) method showing a radical scavenging ability (EC50=0.093-0.118 μM) higher than Trolox used as reference. Furthermore, these compounds were able to bind both iron and copper, especially the iron (III), by the formation of hexa-coordinated complexes. Synthesized compounds were tested to evaluate their ability to inhibit acetyl- and butyryl-cholinesterase; the obtained results have demonstrated that they are selective inhibitors of AChE (Ki=1.5-18.9 μM) and result weakly active versus butyrylcholinesterase (BChE).
authors: Department of "Chimica e Tecnologie del Farmaco" and.
authors: Laura
authors: L
authors: Friggeri
authors: Daniela
authors: D
authors: De Vita
authors: Fabiana
authors: F
authors: Pandolfi
authors: Silvano
authors: S
authors: Tortorella
authors: Roberta
authors: R
authors: Costi
authors: Roberto
authors: R
authors: Di Santo
authors: Luigi
authors: L
authors: Scipione
mesh_terms: D000110:Acetylcholinesterase / Q000737:chemistry*; D000818:Animals; D000975:Antioxidants / Q000138:chemical synthesis* / Q000737:chemistry; D001713:Biphenyl Compounds / Q000037:antagonists & inhibitors; D002091:Butyrylcholinesterase / Q000737:chemistry; D002614:Chelating Agents / Q000138:chemical synthesis* / Q000737:chemistry; D002800:Cholinesterase Inhibitors / Q000138:chemical synthesis* / Q000737:chemistry; D002839:Chromans / Q000737:chemistry; D056831:Coordination Complexes / Q000737:chemistry; D003300:Copper / Q000737:chemistry; D015195:Drug Design; D062385:Hydroxybenzoates / Q000138:chemical synthesis* / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D007700:Kinetics; D062105:Molecular Docking Simulation; D010851:Picrates / Q000037:antagonists & inhibitors; D013329:Structure-Activity Relationship; D014101:Torpedo
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D002614:Chelating Agents; D002800:Cholinesterase Inhibitors; D002839:Chromans; D056831:Coordination Complexes; D062385:Hydroxybenzoates; D010851:Picrates; C009091:protocatechuic acid; D003300:Copper; C004931:1,1-diphenyl-2-picrylhydrazyl; D007501:Iron; D000110:Acetylcholinesterase; D002091:Butyrylcholinesterase; C010643:6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid
keywords: Antioxidant activity; DPPH method; Job’s method; bio-metal chelation; cholinesterase inhibitors