Auswirkungen von Cannabidiol (CBD) auf das Gedächtnis, Angst- und Lernverhalten sowie die Alzheimer Pathologie in weiblichen 5xFAD Mäusen
The effects of cannabidiol (CBD) on memory, anxiety and learning behavior, as well as Alzheimer's pathology in female 5xFAD mice.
by Paula Katharina Pfeifer
Date of Examination:2024-11-21
Date of issue:2024-11-15
Advisor:Dr. Yvonne PD. Bouter
Referee:PD Dr. Yvonne Bouter
Referee:Prof. Dr. Thomas Dresbach
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Abstract
English
In this study, the influence of the non-psychoactive cannabinoid cannabidiol (CBD) on amyloid pathology, neuroinflammation, as well as cognitive and anxiety-related behavioral changes associated with Alzheimer's disease (AD) was investigated in the 5xFAD mouse model. Female 5xFAD mice, starting at the age of five months, were treated intraperitoneally with a dose of 20 mg/kg body weight of CBD for a period of 42 days, followed by testing for AD-like symptoms. The results showed that CBD led to a significant improvement in impaired spatial memory, as assessed in the Morris Water Maze. Furthermore, CBD normalized reduced anxiety behavior in the Elevated Plus Maze compared to the vehicle-treated group. Histopathological analysis revealed a significant reduction in amyloid-β plaque pathology and alterations in the presence of microglia and astrocytes, while CB1 receptor density remained unchanged. The treatment was not associated with any changes in physiological behavior, motor function, or weight fluctuations, indicating good tolerability. These findings support further investigation of the endocannabinoid system as a potential therapeutic target for AD, particularly through the low-risk use of CBD.
Keywords: Alzheimer; Cannabidiol; 5xFAD; Amyloid-Plaques; Neuroinflammation; memory; anxiety