Abstract:The Kryptopterus bicirrhis (glass catfish) is known to respond to electromagnetic fields (EMF). Here we tested its avoidance behavior in response to static and alternating magnetic fields stimulation. Using expression cloning we identified an electromagnetic perceptive gene (EPG) from the K. bicirrhis encoding a protein that responds to EMF. This EPG gene was cloned and expressed in mammalian cells, neuronal cultures and in rat’s brain. Immunohistochemistry showed that the expression of EPG is confined to the … Show more
“…The HEK293T cells were transfected with a pcDNA3.1 vector construct containing the EPG gene under the CMV promoter pcDNA3.1-EPG+GFP [32] ( Figure 1A). Figure 1B shows the schematic drawing of the biological circuit.…”
Section: Resultsmentioning
confidence: 99%
“…The measured responded cells were described as a numeric value at a given time point. Responding cells were determined using the following equation (Equation 1) [32]:…”
Section: Cell Identificationmentioning
confidence: 99%
“…This study utilizes the electromagnetic perceptive gene (EPG) that was isolated from Kryptopterus bicirrhis (glass catfish) and was demonstrated to respond to electromagnetic fields (EMF) [32]. Previous results have shown that EPG gene activation by an electromagnetic stimulus is primarily associated with an increase in intracellular calcium, [Ca 2+ ] i Activation of EPG by electromagnetic stimulus has been successfully reported in in-vivo (rodent) and in-vitro models (HEK cells, primary cortical neurons).…”
Developing synthetic biological devices to allow the noninvasive control of cell fate and function, in vivo can potentially revolutionize the field of regenerative medicine. To address this unmet need, we designed an artificial biological “switch” that consists of two parts: (1) the electromagnetic perceptive gene (EPG) and (2) magnetic particles. Our group has recently cloned the EPG from the Kryptopterus bicirrhis (glass catfish). The EPG gene encodes a putative membrane-associated protein that responds to electromagnetic fields (EMFs). This gene’s primary mechanism of action is to raise the intracellular calcium levels or change in flux through EMF stimulation. Here, we developed a system for the remote regulation of [Ca2+]i (i.e., intracellular calcium ion concentration) using streptavidin-coated ferromagnetic particles (FMPs) under a magnetic field. The results demonstrated that the EPG-FMPs can be used as a molecular calcium switch to express target proteins. This technology has the potential for controlled gene expression, drug delivery, and drug developments.
“…The HEK293T cells were transfected with a pcDNA3.1 vector construct containing the EPG gene under the CMV promoter pcDNA3.1-EPG+GFP [32] ( Figure 1A). Figure 1B shows the schematic drawing of the biological circuit.…”
Section: Resultsmentioning
confidence: 99%
“…The measured responded cells were described as a numeric value at a given time point. Responding cells were determined using the following equation (Equation 1) [32]:…”
Section: Cell Identificationmentioning
confidence: 99%
“…This study utilizes the electromagnetic perceptive gene (EPG) that was isolated from Kryptopterus bicirrhis (glass catfish) and was demonstrated to respond to electromagnetic fields (EMF) [32]. Previous results have shown that EPG gene activation by an electromagnetic stimulus is primarily associated with an increase in intracellular calcium, [Ca 2+ ] i Activation of EPG by electromagnetic stimulus has been successfully reported in in-vivo (rodent) and in-vitro models (HEK cells, primary cortical neurons).…”
Developing synthetic biological devices to allow the noninvasive control of cell fate and function, in vivo can potentially revolutionize the field of regenerative medicine. To address this unmet need, we designed an artificial biological “switch” that consists of two parts: (1) the electromagnetic perceptive gene (EPG) and (2) magnetic particles. Our group has recently cloned the EPG from the Kryptopterus bicirrhis (glass catfish). The EPG gene encodes a putative membrane-associated protein that responds to electromagnetic fields (EMFs). This gene’s primary mechanism of action is to raise the intracellular calcium levels or change in flux through EMF stimulation. Here, we developed a system for the remote regulation of [Ca2+]i (i.e., intracellular calcium ion concentration) using streptavidin-coated ferromagnetic particles (FMPs) under a magnetic field. The results demonstrated that the EPG-FMPs can be used as a molecular calcium switch to express target proteins. This technology has the potential for controlled gene expression, drug delivery, and drug developments.
“…However, one of the drawbacks of this technology is the requirement to deliver the light directly into the target neural population. Here we tested if neuromodulation via the magnetic sensitive protein EPG, which provides cell and temporal specificity while being activated remotely via non-invasive electromagnetic fields 53 , can be utilized to restore cortical excitability and achieve similar sensorimotor outcomes compared to rTMS. The results demonstrate that daily magnetic activation of EPG improved sensory, motor, and an overall well-being of the injured rats in a battery of behavioral tests that were performed up to 4 weeks after the EPG treatment ended.…”
Section: Discussionmentioning
confidence: 99%
“…One of these technologies, magnetic manipulation by the electromagnetic preceptive gene (EPG), allows non-invasive and cell-specific neuromodulation using external magnetic fields. EPG is a protein that is sensitive to electromagnetic fields which was recently identified in the fish Kryptopterus bicirrhis 43 . Recent work had demonstrated that calcium imaging in mammalian cells and cultured neurons expressing EPG activated remotely by magnetic fields led to increases in intracellular calcium concentrations, indicative of cellular excitability.…”
Peripheral nerve injury leads to altered cortical excitation-inhibition balance which is associated with sensory dysfunctions. We tested if non-invasive repetitive transcranial magnetic stimulation (rTMS) which has shown to induce neuronal excitability, and cell-specific magnetic activation via the Electromagnetic-perceptive gene (EPG) which is a novel gene that was identified and cloned from Kryptopterrus bicirrhis and demonstrated to evoke neural responses when magnetically stimulated, can restore cortical excitability. A battery of behavioral tests, fMRI and immunochemistry were performed in the weeks following limb denervation in rats. The results demonstrate that neuromodulation significantly improved long-term mobility, decreased anxiety and enhanced neuroplasticity. The study also identifies the acute post-injury phase as a critical time for intervention. Moreover, the results implicate EPG as an effective cell-specific neuromodulation approach. Together, these results reinforce the growing amount of evidence from human and animal studies that are establishing neuromodulation as an effective strategy to promote plasticity and rehabilitation.
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