title: Bioactivity-guided Separation of the Active Compounds in Acacia pennata Responsible for the Prevention of Alzheimer's Disease.
abstract: The objective of this study was to evaluate the health benefits of plants used in Thai food, specifically Acacia pennata Willd., in Alzheimer's prevention. A. pennata twigs strongly inhibited β-amyloid aggregation. Bioactivity-guided separation of the active fractions yielded six known compounds, tetracosane (1), 1-(heptyloxy)-octadecane (2), methyl tridecanoate (3), arborinone (4), confertamide A (5) and 4-hydroxy-1-methyl-pyrrolidin-2-carboxylic acid (6). The structures were determined by spectroscopic analysis. Biological testing revealed that tetracosane (1) was the most potent inhibitor of β-amyloid aggregation, followed by 1-(heptyloxy)-octadecane (2) with IC50 values of 0.4 and 12.3 μM. Methyl tridecanoate (3), arborinone (4) and 4-hydroxy-1-methyl-pyrrolidin-2-carboxylic acid (6) moderately inhibited β-amyloid aggregation. In addition, tetracosane (1) and methyl tridecanoate (3) weakly inhibited acetylcholinesterase (AChE). These results suggested that the effect of A. pennata on Alzheimer's disease was likely due to the inhibition of β-amyloid aggregation. Thus A. pennata may be beneficial for Alzheimer's prevention.
authors.forename: Pattamapan
authors.initials: P
authors.lastname: Lomarat
authors.forename: Sirirat
authors.initials: S
authors.lastname: Chancharunee
authors.forename: Natthinee
authors.initials: N
authors.lastname: Anantachoke
authors.forename: Worawan
authors.initials: W
authors.lastname: Kitphati
authors.forename: Kittisak
authors.initials: K
authors.lastname: Sripha
authors.forename: Nuntavan
authors.initials: N
authors.lastname: Bunyapraphatsara
mesh_terms: D000045:Acacia / Q000737:chemistry*; D000110:Acetylcholinesterase / Q000378:metabolism; D000544:Alzheimer Disease / Q000201:enzymology / Q000378:metabolism / Q000517:prevention & control*; D016229:Amyloid beta-Peptides / Q000378:metabolism; D002800:Cholinesterase Inhibitors / Q000737:chemistry / Q000302:isolation & purification; D006801:Humans; D020128:Inhibitory Concentration 50; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification*; D013329:Structure-Activity Relationship
chemical_list: D016229:Amyloid beta-Peptides; D002800:Cholinesterase Inhibitors; D010936:Plant Extracts; D000110:Acetylcholinesterase