Researchers at Duke University School of Medicine have developed a technology that could fundamentally change the treatment of neurological and psychiatric disorders. Instead of relying on medication or external brain stimulation, the new approach creates engineered electrical connections between specific neurons, effectively building a biological “bypass” around damaged brain circuits.
The technology, called LinCx, was described this week in the scientific journal Nature. According to the research team, the innovation may eventually help restore communication in disrupted neural networks linked to conditions such as depression, schizophrenia and neurodegenerative disease.
Rewiring the brain
Modern neuroscience has long struggled with the challenge of selectively influencing small groups of neurons without affecting the surrounding brain tissue. Existing approaches, including pharmaceuticals, electrical stimulation and optogenetics, typically act on broad populations of cells.
LinCx takes a different route. Rather than repairing damaged synapses directly, the technology introduces a new engineered electrical pathway between chosen neurons. This enables targeted communication within specific circuits while leaving the brain’s native connections intact.
The work was led by psychiatrist and neuroscientist Kafui Dzirasa, who described the development as a major advance in the ability to edit brain circuitry at cellular resolution. According to the researchers, the engineered connections function like biological wiring that can strengthen communication between selected brain cells over long periods of time. This may provide a more durable and precise alternative to current neuromodulation techniques.
A new neural tool
The system is based on proteins originally identified in fish that naturally form electrical synapses. Using protein engineering, the Duke team redesigned these molecules so they connect exclusively with matching engineered partners, avoiding interaction with the brain’s natural proteins.
To identify suitable protein pairs, the researchers developed a fluorescence-based screening method that allowed them to test the specificity and signal-transmitting ability of the engineered molecules. The resulting system proved capable of reliably transmitting electrical signals between cells while minimizing unintended connections — a longstanding challenge in previous attempts to manipulate electrical synapses.
From worms to mice
The researchers tested LinCx in both worms and mice to assess whether engineered electrical pathways could influence behaviour. In worms, introducing new connections altered temperature-seeking behaviour. In mice, the targeted electrical links strengthened communication within selected neural circuits and changed broader brain activity patterns.
The behavioural effects were also measurable. Mice showed changes in social interaction and responses to stress, suggesting that the technology can reshape complex brain functions through highly targeted circuit modification.
Future ppplications
While the research remains at an early stage, the findings point toward a new therapeutic direction for neurological and psychiatric disorders caused by disrupted neural connectivity.
The next phase of research will investigate whether LinCx can compensate for synaptic deficits associated with lifelong genetic abnormalities. If successful, the approach could eventually open the door to highly personalised brain circuit therapies that restore function without continuous drug treatment or implanted stimulation devices.
For digital health and neuroscience, the study represents another step toward precision neuromodulation, where treatments are designed not only for specific diseases, but for the exact neural circuits underlying them.
