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Low-Intensity rTMS Temporarily Restores Synaptic Plasticity in Alzheimer’s Mice

Two-photon imaging reveals a peak in localized presynaptic remodeling that could guide clinical protocols for Alzheimer’s treatment

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Overview

  • A single low-intensity rTMS session boosted terminaux bouton turnover in both APP/PS1 Alzheimer’s model and wild-type mice, according to a Neurophotonics study.
  • Turnover of local synaptic endings surged by 88% in healthy mice and 213% in Alzheimer’s model mice two days after stimulation before returning to baseline by day eight.
  • The stimulation selectively enhanced dynamics of terminaux boutons without altering en passant bouton turnover, indicating bouton-type specificity.
  • Researchers used live two-photon microscopy to image individual axonal boutons every 48 hours over an eight-day period surrounding the rTMS session.
  • These mechanistic insights underpin the rationale for optimizing targeted rTMS protocols as the therapy advances into human Alzheimer’s trials.