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Application of Genetically Encoded Fluorescent Nitric Oxide (NO•) Probes, the geNOps, for Real-time Imaging of NO• Signals in Single Cells
Published on: March 16, 2017
Electromagnetic fields instantaneously modulate nitric oxide signaling in challenged biological systems
1Department of Biomedical Engineering, Columbia University, NY, USA. aap1@columbia.edu
Biochemical and Biophysical Research Communications
|September 4, 2012
Summary
Non-thermal radiofrequency (RF) signals rapidly increase nitric oxide (NO) by modulating calmodulin (CaM) activation. This discovery offers new insights into electromagnetic field (EMF) bioeffects and potential pain management applications.
Area of Science:
- Biophysics
- Cellular Biology
- Biomedical Engineering
Background:
- Nitric oxide (NO) is a critical signaling molecule involved in numerous physiological processes, including cellular responses to injury and inflammation.
- Calmodulin (CaM) plays a key role in mediating cellular responses to calcium ions and is implicated in various signaling pathways.
- Electromagnetic fields (EMF) have been reported to influence biological systems, but the underlying mechanisms are not fully understood.
Purpose of the Study:
- To investigate the real-time effect of non-thermal pulse-modulated radiofrequency (PRF) signals on nitric oxide (NO) release from challenged cells.
- To elucidate the role of calmodulin (CaM) in mediating the cellular response to PRF signals.
- To explore the potential therapeutic applications of PRF in modulating NO pathways for pain management.
Main Methods:
- Utilized dopaminergic MN9D and human fibroblast cell cultures.
- Applied a non-thermal pulse-modulated RF signal (PRF) designed to modulate CaM activation.
- Measured real-time NO release electrochemically using a NO-selective membrane electrode.
- Employed a CaM antagonist (W-7) to confirm the role of CaM in the observed effects.
Main Results:
- PRF exposure caused an immediate, significant increase (nearly 3-fold) in NO release from MN9D cells within seconds of lipopolysaccharide (LPS) challenge.
- In human fibroblasts, PRF also increased NO release (nearly 2-fold), and this effect was blocked by the CaM antagonist W-7.
- Demonstrated the first real-time observation of non-thermal EMF influencing NO release from challenged cells, implicating CaM as a key mediator.
Conclusions:
- Non-thermal PRF signals can rapidly modulate NO production through CaM activation, offering a novel mechanism for EMF bioeffects.
- The findings provide mechanistic support for EMF's role in biological processes where NO is involved.
- Suggests potential clinical applications for EMF therapy in pain management by modulating NO pathways via CaM-dependent constitutive nitric oxide synthase (cNOS).
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