Inhibition of amyloid ß aggregation and protective effect on SH-SY5Y cells by triterpenoid saponins from the cactus Polaskia chichipe.
Bioorg Med Chem
; 25(13): 3377-3383, 2017 07 01.
Article
in En
| MEDLINE
| ID: mdl-28478866
ABSTRACT
Alzheimer's disease (AD) destroys brain function, especially in the hippocampus, and is a social problem worldwide. A major pathogenesis of AD is related to the accumulation of amyloid beta (Aß) peptides, resulting in neuronal cell death in the brain. Here, we isolated four saponins (1-4) and elucidated their structures from 1D and 2D NMR and HRFABMS spectral data. The structures of 1 and 2 were determined as new saponins which have cochalic acid as the aglycon, and 3 was determined as a new saponin with oleanolic acid as the aglycon. Compound 4 was confirmed as the known saponin chikusetsusaponin V (=ginsenoside R0). Isolated saponins (1-4) and six previously reported saponins (5-10) were tested for their inhibitory effects of Aß aggregation and their protective effects on SH-SY5Y cells against Aß-associated toxicity. As the results, compounds 3 and 4 showed inhibitory effect of Aß aggregation and compounds 5-8 exerted the protective effects on SH-SY5Y cells against Aß-associated toxicity.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Saponins
/
Amyloid beta-Peptides
/
Cactaceae
Limits:
Humans
Language:
En
Journal:
Bioorg Med Chem
Journal subject:
BIOQUIMICA
/
QUIMICA
Year:
2017
Type:
Article
Affiliation country:
Japan