RF Safe

Mutagenicity and toxicity of electromagnetic fields.

Journal of environmental pathology, toxicology and oncology : official organ of the International Society for Environmental Toxicology and Cancer · 1993 · Mixed · Low evidence

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MixedLow evidencePaper 5463

In Chinese hamster V79 cells exposed to a 50-Hz sinusoidal EMF at 2 G, no modification of mutation frequency (HGPRT- mutants) was observed. Survival/viability results were contrasting: plating 10^2 cells showed reduced colonies (about 50% after 10 days), whil…

Study snapshot

PublicationJournal of environmental pathology, toxicology and oncology : official organ of the International Society for Environmental Toxicology and Cancer · 1993
Study typein_vitro
Reported directionMixed
Evidence ratingLow

Abstract

Humans are exposed daily to electromagnetic fields (EMFs) originating from a variety of devices and systems. During the 1980s many reports of potential mutagenic, teratogenic, and carcinogenic effects of EMFs were published, sometimes with contrasting results. To date, no study has established unequivocally a causal relationship between EMFs and cancer. Cell cultures can provide a simple and inexpensive tool for the study of the effects of EMFs. We have used the Chinese hamster V79 cell line to evaluate the influence of a sinusoidal EMF at 50-Hz with a constant flow of 2 G on the induction of HGPRT- mutants and on survival. Our results showed that the EMF employed did not induce any modification of mutation frequency, but the results on survival were contrasting. When only 10(2) cells were plated, a reduction in the number of colonies, reaching about 50% after 10 days of treatment, was observed; however, when 2 x 10(5) cells or more were seeded, no reduction in viability was recorded. An intercellular metabolic interaction may explain these results.

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 typein_vitro
Effect directionmixed
PopulationChinese hamster V79 cell line (cell culture)
Sample sizeNot supplied
ExposureELF · 0.05 MHz · 10 days (treatment mentioned for colony reduction condition)
Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

In Chinese hamster V79 cells exposed to a 50-Hz sinusoidal EMF at 2 G, no modification of mutation frequency (HGPRT- mutants) was observed. Survival/viability results were contrasting: plating 10^2 cells showed reduced colonies (about 50% after 10 days), while seeding 2×10^5 cells or more showed no reduction in viability.

Outcomes measured

  • HGPRT- mutant induction / mutation frequency
  • Cell survival / viability (colony formation)

Limitations

  • In vitro cell culture model; may not generalize to humans
  • Contrasting survival results depended on plating density, complicating interpretation
  • Exposure source/device not specified beyond field characteristics
  • Sample size and replication details not provided in abstract
View raw extracted JSON
{
  "study_type": "in_vitro",
  "exposure": {
    "band": "ELF",
    "source": null,
    "frequency_mhz": 0.05,
    "sar_wkg": null,
    "duration": "10 days (treatment mentioned for colony reduction condition)"
  },
  "population": "Chinese hamster V79 cell line (cell culture)",
  "sample_size": null,
  "outcomes": [
    "HGPRT- mutant induction / mutation frequency",
    "Cell survival / viability (colony formation)"
  ],
  "main_findings": "In Chinese hamster V79 cells exposed to a 50-Hz sinusoidal EMF at 2 G, no modification of mutation frequency (HGPRT- mutants) was observed. Survival/viability results were contrasting: plating 10^2 cells showed reduced colonies (about 50% after 10 days), while seeding 2×10^5 cells or more showed no reduction in viability.",
  "effect_direction": "mixed",
  "limitations": [
    "In vitro cell culture model; may not generalize to humans",
    "Contrasting survival results depended on plating density, complicating interpretation",
    "Exposure source/device not specified beyond field characteristics",
    "Sample size and replication details not provided in abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electromagnetic fields",
    "ELF",
    "50 Hz",
    "2 G",
    "Chinese hamster V79",
    "HGPRT mutation",
    "mutagenicity",
    "cell survival",
    "colony formation"
  ],
  "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: Not supplied
PubMed: 8189366

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