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Electromagnetic fields as first messenger in biological signaling: Application to calmodulin-dependent signaling in tissue repair.

Biochimica et biophysica acta · 2011 · Mixed · Low evidence

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MixedLow evidencePaper 4435

Configured non-thermal EMF signals modulated calmodulin-dependent enzyme kinetics and increased second messengers (NO and cGMP in chondrocyte and endothelial cultures; cAMP in neuronal cultures). Calmodulin antagonists and downstream blockers eliminated these…

Study snapshot

PublicationBiochimica et biophysica acta · 2011
Study typeother
Reported directionMixed
Evidence ratingLow

Abstract

BACKGROUND: The transduction mechanism for non-thermal electromagnetic field (EMF) bioeffects has not been fully elucidated. This study proposes that an EMF can act as a first messenger in the calmodulin-dependent signaling pathways that orchestrate the release of cytokines and growth factors in normal cellular responses to physical and/or chemical insults. METHODS: Given knowledge of Ca(2+) binding kinetics to calmodulin (CaM), an EMF signal having pulse duration or carrier period shorter than bound Ca(2+) lifetime may be configured to accelerate binding, and be detectable above thermal noise. New EMF signals were configured to modulate calmodulin-dependent signaling and assessed for efficacy in cellular studies. RESULTS: Configured EMF signals modulated CaM-dependent enzyme kinetics, produced several-fold increases in key second messengers to include nitric oxide and cyclic guanosine monophosphate in chondrocyte and endothelial cultures and cyclic adenosine monophosphate in neuronal cultures. Calmodulin antagonists and downstream blockers annihilated these effects, providing strong support for the proposed mechanism. CONCLUSIONS: Knowledge of the kinetics of Ca(2+) binding to CaM, or for any ion binding specific to any signaling cascade, allows the use of an electrochemical model by which the ability of any EMF signal to modulate CaM-dependent signaling can be assessed a priori or a posteriori. Results are consistent with the proposed mechanism, and strongly support the Ca/CaM/NO pathway as a primary EMF transduction pathway. GENERAL SIGNIFICANCE: The predictions of the proposed model open a host of significant possibilities for configuration of non-thermal EMF signals for clinical and wellness applications that can reach far beyond fracture repair and wound healing.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeother
Effect directionmixed
PopulationNot supplied
Sample sizeNot supplied
ExposureNot supplied
Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Configured non-thermal EMF signals modulated calmodulin-dependent enzyme kinetics and increased second messengers (NO and cGMP in chondrocyte and endothelial cultures; cAMP in neuronal cultures). Calmodulin antagonists and downstream blockers eliminated these effects, which the authors interpret as supporting a Ca/CaM/NO-mediated transduction mechanism.

Outcomes measured

  • Calmodulin (CaM)-dependent enzyme kinetics
  • Second messengers: nitric oxide (NO)
  • Second messengers: cyclic guanosine monophosphate (cGMP)
  • Second messengers: cyclic adenosine monophosphate (cAMP)
  • Proposed EMF transduction mechanism via Ca/CaM/NO pathway

Limitations

  • No EMF exposure parameters (e.g., frequency, intensity, SAR) are reported in the abstract
  • In vitro cellular studies; generalizability to in vivo/clinical outcomes is not established in the abstract
  • Sample sizes and statistical details are not provided in the abstract
View raw extracted JSON
{
  "study_type": "other",
  "exposure": {
    "band": null,
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Calmodulin (CaM)-dependent enzyme kinetics",
    "Second messengers: nitric oxide (NO)",
    "Second messengers: cyclic guanosine monophosphate (cGMP)",
    "Second messengers: cyclic adenosine monophosphate (cAMP)",
    "Proposed EMF transduction mechanism via Ca/CaM/NO pathway"
  ],
  "main_findings": "Configured non-thermal EMF signals modulated calmodulin-dependent enzyme kinetics and increased second messengers (NO and cGMP in chondrocyte and endothelial cultures; cAMP in neuronal cultures). Calmodulin antagonists and downstream blockers eliminated these effects, which the authors interpret as supporting a Ca/CaM/NO-mediated transduction mechanism.",
  "effect_direction": "mixed",
  "limitations": [
    "No EMF exposure parameters (e.g., frequency, intensity, SAR) are reported in the abstract",
    "In vitro cellular studies; generalizability to in vivo/clinical outcomes is not established in the abstract",
    "Sample sizes and statistical details are not provided in the abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electromagnetic field",
    "non-thermal EMF",
    "signal configuration",
    "calmodulin",
    "Ca2+ binding kinetics",
    "Ca/CaM/NO pathway",
    "nitric oxide",
    "cGMP",
    "cAMP",
    "chondrocytes",
    "endothelial cells",
    "neuronal cultures",
    "tissue repair",
    "wound healing",
    "fracture repair"
  ],
  "suggested_hubs": []
}
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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1016/j.bbagen.2011.10.001
PubMed: 22005645

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