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Related Concept Videos

Brain Imaging01:14

Brain Imaging

229
Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic...
229

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Scanning ultrasound-mediated memory and functional improvements do not require amyloid-β reduction.

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Scanning ultrasound (SUS) therapy improved memory in an Alzheimer

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Gerontology

Background:

  • Alzheimer's disease (AD) treatment often focuses on amyloid-beta (Aβ) plaques.
  • Current therapeutic strategies aim to reduce Aβ burden for cognitive enhancement.

Purpose of the Study:

  • To investigate the efficacy of scanning ultrasound (SUS) in ameliorating memory deficits in a mouse model of AD.
  • To explore the effects of SUS on Aβ burden and cognitive function independently.
  • To determine the impact of ultrasound frequency on therapeutic outcomes.

Main Methods:

  • Utilized the APP23 mouse model of Alzheimer's disease.
  • Administered repeated scanning ultrasound (SUS) treatment at 1 MHz frequency without microbubbles.
  • Assessed memory deficits and Aβ burden.
  • Employed quantitative SWATH proteomics and functional magnetic resonance imaging (fMRI).

Main Results:

  • SUS treatment ameliorated memory deficits without reducing Aβ burden.
  • Ultrasound induced long-lasting functional brain changes correlated with memory improvement.
  • Higher frequency (1 MHz) SUS was more effective than lower frequency (286 kHz).
  • Blood-brain barrier (BBB) opening was not required for therapeutic effects.

Conclusions:

  • Cognitive improvement in AD can be achieved independently of Aβ clearance.
  • Ultrasound exhibits frequency-dependent bio-effects with potential therapeutic applications.
  • Findings have significant implications for designing future Alzheimer's disease clinical trials.