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Wireless magnetothermal deep brain stimulation.

Abstract
Wireless deep brain stimulation of well-defined neuronal populations could facilitate the study of intact brain circuits and the treatment of neurological disorders. Here, we demonstrate minimally invasive and remote neural excitation through the activation of the heat-sensitive capsaicin receptor TRPV1 by magnetic nanoparticles. When exposed to alternating magnetic fields, the nanoparticles dissipate heat generated by hysteresis, triggering widespread and reversible firing of TRPV1(+) neurons. Wireless magnetothermal stimulation in the ventral tegmental area of mice evoked excitation in subpopulations of neurons in the targeted brain region and in structures receiving excitatory projections. The nanoparticles persisted in the brain for over a month, allowing for chronic stimulation without the need for implants and connectors.
AuthorsRitchie Chen, Gabriela Romero, Michael G Christiansen, Alan Mohr, Polina Anikeeva
JournalScience (New York, N.Y.) (Science) Vol. 347 Issue 6229 Pg. 1477-80 (Mar 27 2015) ISSN: 1095-9203 [Electronic] United States
PMID25765068 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, Non-P.H.S.)
CopyrightCopyright © 2015, American Association for the Advancement of Science.
Chemical References
  • Magnetite Nanoparticles
  • TRPV Cation Channels
  • Trpv1 protein, rat
Topics
  • Action Potentials
  • Animals
  • Deep Brain Stimulation (methods)
  • Evoked Potentials
  • HEK293 Cells
  • Humans
  • Magnetite Nanoparticles
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Neurons (physiology)
  • Rats
  • TRPV Cation Channels (agonists)
  • Ventral Tegmental Area (physiology)
  • Wireless Technology

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