Dongguk University Researchers Develop Electromagnetically Controllable Gene Switch for Remote Gene Therapy
核心洞察
Researchers at Dongguk University developed an electromagnetic field (EMF)-inducible gene switch enabling fully reversible, safe, and precise remote control of gene expression.
The switch uses the Lgr4 (搜索) gene promoter and was validated in transgenic mice, showing tunable, localized expression that returns to baseline within 24 hours after stimulation stops.
A genome-wide CRISPR-Cas9 screen identified cytochrome b5 type B (Cyb5b (搜索)) as the first reported molecular sensor for electromagnetic fields.
A research team at Dongguk University in the Republic of Korea has developed a novel electromagnetic field (EMF)-responsive gene switch that enables fully reversible, safe, and precise control over gene expression, representing a powerful non-invasive platform for gene research and therapy. The study, led by Professor Jongpil Kim and Doctoral student Yerim Hwang from the Institute for Stem Cells and Regenerative Medicine, was made available online on April 14, 2026, and published in Volume 189, Issue 11 of the journal Cell on May 28, 2026.
The work addresses a longstanding limitation in the field of remote gene control. While researchers have previously developed gene switches activated by stimuli such as drugs, light, heat, ultrasound, and electrical signals, these existing approaches offer limited precision over the timing and duration of gene expression. Drug-based gene switches can produce undesirable adverse effects, and certain stimuli such as light face challenges penetrating deeper tissues.
Identifying an EMF-Responsive Element
To identify genes responsive to electromagnetic fields, the researchers performed single-cell RNA sequencing (scRNA-seq) on mouse brain tissue following exposure to an EMF of 2.0 millitesla at 60 hertz. This analysis revealed exclusive upregulation of Lgr4 (搜索) expression. Through a series of validation experiments, the team determined that the promoter of Lgr4 was well suited for constructing an EMF-inducible (Ei) gene switch, exhibiting precise activation with no detectable adverse effects during the study.
"In previous studies, extremely low frequency EMF fields have been shown to modulate expression of specific genes involved in stress response, epigenetic remodelling, and cellular signalling pathways. Moreover, EMF is non-invasive, fully-reversible, and can precisely penetrate target tissues or areas of the body, making them highly attractive for remote control of gene switches," explained Professor Kim. "In this study, we utilized the promoter of the Lgr4 (搜索) gene to create a robust EMF-inducible gene switch, and demonstrated its applications in Alzheimer's disease (搜索) (AD) modelling and reversing aging markers in mice."
Validation in Living Animals
To evaluate the system in living animals, the researchers linked the Ei element to a reporter that produces green fluorescent protein (GFP), allowing gene activity to be visualized. They then generated transgenic mice carrying this reporter. Following EMF exposure, the mice showed strong GFP expression throughout the body, while targeted EMF exposure produced localized gene expression in specific organs. When EMF stimulation was discontinued, gene expression returned to baseline within 24 hours, demonstrating that the Ei gene switch is highly tunable, reversible, and capable of precise remote control of gene expression.
Uncovering a Molecular Sensor for EMF
Using a genome-wide CRISPR-Cas9 knockout screen, the researchers identified cytochrome b5 type B (Cyb5b (搜索)), a membrane-associated protein, as the biological sensor for EMF. "This may be the first reported molecular sensor for electromagnetic fields," noted Professor Kim. Further tests revealed that, due to EMF exposure, Cyb5b produces rhythmic, oscillating calcium influx oscillations in cells, functioning as a specific code for activating the target gene.
Therapeutic Applications
The researchers demonstrated several applications of the Ei gene switch. Notably, they established an Alzheimer's disease (搜索) (AD) mouse model that decouples brain aging from amyloid β plaque deposition. In addition, cyclic EMF exposure was used to achieve partial cellular reprogramming in aged and progeroid mice, improving several aging-associated markers without detectable adverse effects. The team also restored serotonin levels and reduced depression-like behaviors in mice by controlling expression of the Tph2 (搜索) gene.
"This technology could move gene therapy away from a single, irreversible dose and toward simpler, real-time treatments administered by physicians or even wearable devices," said Mr. Hwang.
Although further validation and testing is required, this innovative Ei gene switch represents a promising platform for developing non-invasive, remotely controlled gene therapies.