Physics / mechanism
Bioelectronic medicine modulates neural circuits via precisely delivered electrical pulses to treat disease without systemic pharmacology. Vagus nerve stimulation (VNS) exploits the cervical vagus as a bidirectional highway—efferent fibers suppress cytokine release via the cholinergic anti-inflammatory pathway; afferent fibers modulate brainstem nuclei controlling cardiac, pulmonary, and GI function. Deep brain stimulation (DBS) targets basal ganglia circuits (subthalamic nucleus, GPi) at 130–180 Hz, 60–90 µs pulse width, 1–3.5 V. Closed-loop systems now sample local field potentials (biomarker bandwidth ~1–300 Hz) and adjust parameters in real time. Implantable pulse generators are shrinking toward mm-scale; MRI-conditional leads (1.5 T / 3 T) are current SoA. Efficacy in Parkinson’s, refractory epilepsy, treatment-resistant depression is established; rheumatoid arthritis and heart failure trials are active.
Competitive landscape
Pharmaceutical immunosuppressants and biologics (TNF inhibitors) are the primary competitive axis for inflammatory indications—bioelectronics trade titration flexibility for no systemic side-effect burden. Competing modalities include focused ultrasound neuromodulation (non-invasive, lower spatial resolution), transcranial magnetic stimulation (surface-limited, no chronic implant), and optogenetics (high selectivity, gene-delivery barrier). Spinal cord stimulation overlaps in pain management.
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Frontier (open questions)
- To be added.