1. Gentidelasides A-G: Loganin derivatives from Gentiana delavayi with reducing Aβ secretion via suppressing BACE1 expression.
- Author
-
Guo HH, Li CX, Yang M, Li FF, Yang HY, Yin M, Wang JP, and Wang FS
- Subjects
- Humans, Iridoid Glucosides pharmacology, Iridoid Glucosides chemistry, Iridoid Glucosides isolation & purification, Molecular Structure, Peptide Fragments metabolism, Peptide Fragments antagonists & inhibitors, Peptide Fragments pharmacology, Structure-Activity Relationship, Dose-Response Relationship, Drug, Flowers chemistry, Iridoids, Amyloid Precursor Protein Secretases antagonists & inhibitors, Amyloid Precursor Protein Secretases metabolism, Aspartic Acid Endopeptidases antagonists & inhibitors, Aspartic Acid Endopeptidases metabolism, Amyloid beta-Peptides antagonists & inhibitors, Amyloid beta-Peptides metabolism, Gentiana chemistry, Molecular Docking Simulation
- Abstract
Gentidelasides A-G (1-7) seven unreported loganin derivatives and fourteen known compounds (8-21) were isolated from the flowers of Gentiana delavayi Franch. Their structures including absolute configurations were unambiguously elucidated by analysis of extensive NMR spectroscopy, ECD, and HRESIMS, as well as enzymatic hydrolysis. In vitro bioassay, compound 7 showed obvious inhibitory effects on the production of Aβ40 and Aβ42, with IC
50 values of 0.052 ± 0.0023 nM and 1.52 ± 0.95 nM, respectively, which probably exert their prevention of Alzheimer's disease by inhibiting the expression of β-site amyloid precursor protein cleaving enzyme 1. The molecular docking simulation revealed that compound 7 inhibited BACE1 through hydrophilic and hydrophobic interactions in the active site cavities., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Ltd. All rights reserved.)- Published
- 2025
- Full Text
- View/download PDF