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Wireless Force‐Inducing Neuronal Stimulation Mediated by High Magnetic Moment Microdiscs
Author(s) -
Collier Claudia,
Muzzio Nicolas,
Thevi Guntnur Rohini,
Gomez Amanda,
Redondo Carolina,
Zurbano Raquel,
Schuller Ivan K.,
Monton Carlos,
Morales Rafael,
Romero Gabriela
Publication year - 2022
Publication title -
advanced healthcare materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.288
H-Index - 90
eISSN - 2192-2659
pISSN - 2192-2640
DOI - 10.1002/adhm.202101826
Subject(s) - stimulation , wireless , moment (physics) , magnetic moment , neuroscience , physics , computer science , psychology , condensed matter physics , telecommunications , classical mechanics
Noninvasive manipulation of cell signaling is critical in basic neuroscience research and in developing therapies for neurological disorders and psychiatric conditions. Here, the wireless force‐induced stimulation of primary neuronal circuits through mechanotransduction mediated by magnetic microdiscs (MMDs) under applied low‐intensity and low‐frequency alternating magnetic fields (AMFs), is described. MMDs are fabricated by top‐down lithography techniques that allow for cost‐effective mass production of biocompatible MMDs with high saturation and zero magnetic magnetic moment at remanence. MMDs are utilized as transducers of AMFs into mechanical forces. When MMDs are exposed to primary rat neuronal circuits, their magneto‐mechanical actuation triggers the response of specific mechanosensitive ion channels expressed on the cell membranes activating ≈50% of hippocampal and ≈90% of cortical neurons subjected to the treatment. Mechanotransduction is confirmed by the inhibition of mechanosensitive transmembrane channels with Gd 3+ . Mechanotransduction mediated by MMDs cause no cytotoxic effect to neuronal cultures. This technology fulfills the requirements of cell‐type specificity and weak magnetic fields, two limiting factors in the development of noninvasive neuromodulation therapies and clinical equipment design. Moreover, high efficiency and long‐lasting stimulations are successfully achieved. This research represents a fundamental step forward for magneto‐mechanical control of neural activity using disc‐shaped micromaterials with tailored magnetic properties.