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Targeted Magnetic Nanodiscs for Wireless Causal Manipulation of Gut-Brain Circuits
Ye Ji Kim1,2,3,4,5, Nasim Biglari2,3,4, Taylor M Cannon2,3,4
1Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
Biorxiv : the Preprint Server for Biology
|April 10, 2026
Summary
Researchers developed wireless magnetite nanodiscs (MNDs) to precisely control vagal gut-brain circuits. This implant-free method targets specific neurons, offering new ways to study metabolism and satiety.
Area of Science:
- Neuroscience
- Biotechnology
- Metabolic Research
Background:
- Vagal gut-brain pathways are crucial for understanding metabolism and interoception.
- Current stimulation methods face anatomical and technical challenges for vagal circuit manipulation.
Purpose of the Study:
- To develop a novel, wireless method for targeted vagal nerve stimulation.
- To investigate the modulation of gut-brain neural circuits using magnetite nanodiscs (MNDs).
Main Methods:
- Magnetite nanodiscs (MNDs) were genetically targeted to specific nodose ganglia neurons.
- Wireless modulation was achieved using slow-varying magnetic fields to induce mechanical torques.
- Depolarization was triggered via endogenous mechanoreceptors in sensory neurons.
Main Results:
- MNDs successfully modulated vagal circuits when targeted to neurons expressing oxytocin or glucagon-like peptide 1 receptors.
- Stimulation activated downstream hindbrain satiety circuits.
- This led to a significant reduction in food intake.
Conclusions:
- Magnetite nanodisc-mediated stimulation offers a targeted, implant-free platform for vagal circuit modulation.
- This technology has potential applications in metabolic research and the study of satiety.
- The approach is extendable to other neural circuits beyond the vagus nerve.
