Chronic Administration of Thymoquinone Enhances Adult Hippocampal Neurogenesis and Improves Memory in Rats Via Regulating the BDNF Signaling Pathway.
CREB/BDNF signaling pathway
Hippocampal neurogenesis
Neural stem/progenitor cells
Thymoquinone
Journal
Neurochemical research
ISSN: 1573-6903
Titre abrégé: Neurochem Res
Pays: United States
ID NLM: 7613461
Informations de publication
Date de publication:
Apr 2022
Apr 2022
Historique:
received:
18
08
2021
accepted:
22
11
2021
revised:
01
11
2021
pubmed:
3
12
2021
medline:
1
4
2022
entrez:
2
12
2021
Statut:
ppublish
Résumé
Thymoquinone is a pharmacologically active component of Nigella sativa Linn. seeds. Despite the diverse neuropharmacological attributes of TQ, limited reports related to adult neurogenesis and memory research are available. In this study, we investigated the effects of TQ on the proliferation and neural differentiation of cultured neural stem/progenitor cells (NSCs/NPCs). We also investigated the effect of TQ chronic administration on neurogenesis and memory in adult rats. Under proliferation conditions, TQ (0.05-0.3 μM) significantly increased NSCs/NPCs viability, neurosphere diameter, and cell count. TQ treatment under differentiation conditions increased the proportion of cells positive for Tuj1 (a neuronal marker). Furthermore, chronic oral administration of TQ (25 mg/kg/day for 12 weeks) to adult rats increased the number of bromodeoxyuridine (BrdU)-immunopositive cells double-stained with a mature neuronal marker, neuronal nuclei (NeuN), and a proliferation marker, doublecortin (Dcx), in the dentate gyrus of the hippocampus. TQ-administered rats showed a profound beneficial effect on avoidance-related learning ability, associated with an increase in the hippocampal mRNA and protein levels of brain-derived neurotrophic factor (BDNF), as measured by both real-time PCR and ELISA. Western blot analysis revealed that TQ stimulates the phosphorylation of cAMP-response element-binding protein (CREB), the upstream signaling molecule in the BDNF pathway. Furthermore, chronic administration of TQ decreased lipid peroxide and reactive oxygen species levels in the hippocampus. Taken together, our results suggest that TQ plays a role in memory improvement in adult rats and that the CREB/BDNF signaling pathways are involved in mediating the actions of TQ in hippocampal neurogenesis.
Identifiants
pubmed: 34855048
doi: 10.1007/s11064-021-03495-8
pii: 10.1007/s11064-021-03495-8
doi:
Substances chimiques
Benzoquinones
0
Brain-Derived Neurotrophic Factor
0
thymoquinone
O60IE26NUF
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
933-951Informations de copyright
© 2021. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
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