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Published on: March 16, 2016
Rotating magnetic field inhibits Aβ protein aggregation and alleviates cognitive impairment in Alzheimer's disease
Ruo-Wen Guo1,2, Wen-Jing Xie1,3, Biao Yu1
1High Magnetic Field Laboratory, CAS Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
Abstract:
Amyloid beta (Aβ) monomers aggregate to form fibrils and amyloid plaques, which are critical mechanisms in the pathogenesis of Alzheimer's disease (AD). Given the important role of Aβ1-42 aggregation in plaque formation, leading to brain lesions and cognitive impairment, numerous studies have aimed to reduce Aβ aggregation and slow AD progression. The diphenylalanine (FF) sequence is critical for amyloid aggregation, and magnetic fields can affect peptide alignment due to the diamagnetic anisotropy of aromatic rings. In this study, we examined the effects of a moderate-intensity rotating magnetic field (RMF) on Aβ aggregation and AD pathogenesis. Results indicated that the RMF directly inhibited Aβ amyloid fibril formation and reduced Aβ-induced cytotoxicity in neural cells in vitro. Using the AD mouse model APP/PS1, RMF restored motor abilities to healthy control levels and significantly alleviated cognitive impairments, including exploration and spatial and non-spatial memory abilities. Tissue examinations demonstrated that RMF reduced amyloid plaque accumulation, attenuated microglial activation, and reduced oxidative stress in the APP/PS1 mouse brain. These findings suggest that RMF holds considerable potential as a non-invasive, high-penetration physical approach for AD treatment.
Insights
Rotating magnetic fields (RMF) inhibit amyloid beta aggregation and reduce Alzheimer's disease (AD) pathology. This non-invasive approach improved cognitive and motor functions in AD mice, offering potential for new AD treatments.
Area of Science:
- Neuroscience
- Biophysics
- Biochemistry
Background:
- Alzheimer's disease (AD) pathogenesis involves amyloid beta (Aβ) aggregation into fibrils and plaques.
- Aβ1-42 aggregation is crucial for plaque formation, leading to cognitive decline.
- Diphenylalanine (FF) sequences are key to amyloid aggregation, and magnetic fields can influence peptide alignment.
Purpose of the Study:
- To investigate the effects of rotating magnetic fields (RMF) on Aβ aggregation and AD pathogenesis.
- To evaluate RMF as a potential non-invasive therapeutic strategy for Alzheimer's disease.
Main Methods:
- Examined the impact of moderate-intensity RMF on Aβ aggregation in vitro.
- Assessed RMF's effects on Aβ-induced cytotoxicity in neural cells.
- Utilized the APP/PS1 mouse model of AD to evaluate RMF's therapeutic potential.
Main Results:
- RMF directly inhibited Aβ amyloid fibril formation and reduced neural cell cytotoxicity.
- RMF treatment restored motor abilities and alleviated cognitive impairments in APP/PS1 mice.
- RMF reduced amyloid plaque burden, microglial activation, and oxidative stress in the AD mouse brain.
Conclusions:
- RMF effectively inhibits Aβ aggregation and ameliorates AD-related pathology and symptoms.
- RMF demonstrates potential as a non-invasive, high-penetration physical therapy for Alzheimer's disease.
- Further research into RMF could lead to novel therapeutic strategies for neurodegenerative diseases.
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