Low-energy electromagnetic fields promote proliferation of vascular smooth muscle cells.

Electromagnetic biology and medicine · 2008 · Benefit · Low evidence

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BenefitLow evidencePaper 5022

Study snapshot

PublicationElectromagnetic biology and medicine · 2008

Study typein_vitro

Reported directionBenefit

Evidence ratingLow

Abstract

The rationale was to investigate the effects of low-energy electromagnetic fields (EMF) on the proliferation of bovine coronary and murine aortic smooth muscle cells (SMC). EMF were applied to SMC at field frequencies of 25, 50, or 100 Hz, and exposure time was set to 5, 15, or 30 minutes. Significant increases in SMC-counts compared with sham exposed controls were found for all EMF-frequencies tested. The effect was most pronounced for 50 Hz fields with maximum increases of 1.2-fold over controls. Sequential double exposure of mouse aortic SMC to 50 Hz fields revealed significantly enhanced cell proliferation by 1.2 fold compared with single exposure (p < 0.05). Experiments performed on bovine SMC also revealed significant increases in cell proliferation. The results demonstrate that EMF are capable of significantly enhancing the proliferation of vascular SMC. These results rise the question whether EMF would qualify as supportive means to angio-/arteriogenic approaches.

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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 typein_vitro

Effect directionbenefit

PopulationBovine coronary and murine aortic smooth muscle cells (vascular SMC)

Sample sizeNot supplied

ExposureELF · 5, 15, or 30 minutes (single exposure); sequential double exposure also tested

Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

Exposure of bovine coronary and murine aortic smooth muscle cells to low-energy EMF at 25, 50, or 100 Hz for 5, 15, or 30 minutes produced significant increases in cell counts versus sham controls across all tested frequencies. The largest reported increase was 1.2-fold (most pronounced at 50 Hz), and sequential double exposure at 50 Hz increased proliferation 1.2-fold compared with single exposure (p < 0.05).

Outcomes measured

Smooth muscle cell proliferation (cell counts)

Limitations

In vitro cell model; findings may not translate to in vivo or human outcomes
No sample size reported in the abstract
Exposure intensity/field strength not reported in the abstract
Short exposure durations only (minutes)

View raw extracted JSON

{
  "study_type": "in_vitro",
  "exposure": {
    "band": "ELF",
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "5, 15, or 30 minutes (single exposure); sequential double exposure also tested"
  },
  "population": "Bovine coronary and murine aortic smooth muscle cells (vascular SMC)",
  "sample_size": null,
  "outcomes": [
    "Smooth muscle cell proliferation (cell counts)"
  ],
  "main_findings": "Exposure of bovine coronary and murine aortic smooth muscle cells to low-energy EMF at 25, 50, or 100 Hz for 5, 15, or 30 minutes produced significant increases in cell counts versus sham controls across all tested frequencies. The largest reported increase was 1.2-fold (most pronounced at 50 Hz), and sequential double exposure at 50 Hz increased proliferation 1.2-fold compared with single exposure (p < 0.05).",
  "effect_direction": "benefit",
  "limitations": [
    "In vitro cell model; findings may not translate to in vivo or human outcomes",
    "No sample size reported in the abstract",
    "Exposure intensity/field strength not reported in the abstract",
    "Short exposure durations only (minutes)"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electromagnetic fields",
    "ELF",
    "25 Hz",
    "50 Hz",
    "100 Hz",
    "vascular smooth muscle cells",
    "bovine coronary",
    "murine aortic",
    "cell proliferation",
    "sham control"
  ],
  "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: 10.1080/15368370701878929
PubMed: 18327713

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