17 Oxo Sparteine and Lupanine, Obtained from Cytisus scoparius, Exert a Neuroprotection against Soluble Oligomers of Amyloid-ß Toxicity by Nicotinic Acetylcholine Receptors.
J Alzheimers Dis
; 67(1): 343-356, 2019.
Article
en En
| MEDLINE
| ID: mdl-30584148
Alzheimer's disease (AD) is a neurodegenerative pathology, which is characterized by progressive and irreversible cognitive impairment. Most of the neuronal perturbations described in AD can be associated with soluble amyloid- ß oligomers (SO-Aß). There is a large amount of evidence demonstrating the neuroprotective effect of Nicotine neurotransmission in AD, mainly through nicotinic acetylcholine receptor (nAChR) activation and antiapoptotic PI3K/Akt/Bcl-2 pathway signaling. Using HPLC and GC/MS, we isolated and characterized two alkaloids obtained from C. scoparius, Lupanine (Lup), and 17- oxo-sparteine (17- ox), and examined their neuroprotective properties in a cellular model of SO-Aß toxicity. Our results showed that Lup and 17- ox (both at 0.03µM) prevented SO-Aß-induced toxicity in PC12 cells (Lup: 64±7%; 17- ox: 57±6%). Similar results were seen in hippocampal neurons where these alkaloids prevented SO-Aß neurotoxicity (Lup: 57±2%; 17- ox: 52±3%) and increased the frequency of spontaneous calcium transients (Lup: 60±4%; 17- Ox: 40±3%), suggesting an enhancing effect on neural network activity and synaptic activity potentiation. All of the neuroprotective effects elicited by both alkaloids were completely blocked by α-bungarotoxin. Additionally, we observed that the presence of both Lup and 17- ox increased Akt phosphorylation levels (52±4% and 35±7%, respectively) in cells treated with SO-Aß (3âh). Taken together, our results suggest that the activation of nAChR by Lup and 17- ox induces neuroprotection in different cellular models, and appears to be an interesting target for the development of new pharmacological tools and strategies against AD.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Esparteína
/
Péptidos beta-Amiloides
/
Receptores Nicotínicos
/
Fármacos Neuroprotectores
/
Cytisus
Límite:
Animals
/
Humans
Idioma:
En
Revista:
J Alzheimers Dis
Asunto de la revista:
GERIATRIA
/
NEUROLOGIA
Año:
2019
Tipo del documento:
Article
País de afiliación:
Chile
Pais de publicación:
Países Bajos