Abstract
Rationale
Amyloid β peptide (Aβ) triggers a series of pathological events including microglial activation, oxidative stress, and inflammation-causing neuronal death and typical pathological changes in Alzheimer’s disease (AD).
Objectives
This study aimed to investigate the therapeutic effects and mechanism of bulbocodin D for AD in vivo.
Methods
In this study, Morris water maze (MWM) analysis was used to detect the cognitive ability of APP/PS1 mice after gavage with bulbocodin D for 2 months. Levels of Aβ40, Aβ42, IL-1β, and TNF-α were evaluated by ELISA. Aβ plaques and biomarkers of neuroinflammation were also investigated through histological analysis.
Results
We established that bulbocodin D significantly improved cognitive deficits in APP/PS1 transgenic mice and reduced the levels of amyloid plaque, Aβ40, and Aβ42. Bulbocodin D also reduced levels of microglial markers IbA1, GFAP, and antioxidant enzymes and reduced the products of lipid peroxidation and proinflammatory cytokines.
Conclusion
In summary, the present study provides preclinical evidence that oral bulbocodin D can reduce AD pathology.
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Abbreviations
- AD:
-
Alzheimer’s disease
- CNS:
-
central nervous system
- Aβ:
-
β-amyloid
- BACE1:
-
beta-secretase
- APP:
-
amyloid precursor protein
- SOD:
-
superoxide dismutase
- GSH-PX:
-
glutathione peroxidase
- MDA:
-
malondialdehyde
- ROS:
-
reactive oxygen damages
- TNF-α:
-
tumor necrosis factor α
- IL-1β:
-
interleukin 1β
- NF-κB:
-
nuclear factor-κb
- ThT:
-
thioflavin T
- IbA1:
-
ionized calcium binding adapter molecule 1
- GFAP:
-
glial fibrillary acidic protein
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Hao, F., Feng, Y. Bulbocodin D ameliorate cognitive impairment in APP/PS1 transgenic mice by modulating amyloid-beta burden, oxidative status and neuroinflammation. Psychopharmacology 238, 2073–2082 (2021). https://doi.org/10.1007/s00213-021-05832-9
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DOI: https://doi.org/10.1007/s00213-021-05832-9