Comparison of the genotoxic effects induced by 50 Hz extremely low-frequency electromagnetic fields and 1800 MHz radiofrequency electromagnetic fields in GC-2 cells.

Radiation research · 2015 · Mixed · Low evidence

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MixedLow evidencePaper 4797

After 24 h intermittent exposure, neither 50 Hz ELF-EMF (1–3 mT) nor 1800 MHz RF-EMF (GSM-Talk; SAR 1–4 W/kg) affected cell viability. ELF-EMF increased DNA strand breaks at 3 mT, while RF-EMF did not induce strand breaks; RF-EMF induced oxidative DNA base da…

Study snapshot

PublicationRadiation research · 2015

Study typein_vitro

Reported directionMixed

Evidence ratingLow

Abstract

Extremely low-frequency electromagnetic fields (ELF-EMF) and radiofrequency electromagnetic fields (RF-EMF) have been considered to be possibly carcinogenic to humans. However, their genotoxic effects remain controversial. To make experiments controllable and results comparable, we standardized exposure conditions and explored the potential genotoxicity of 50 Hz ELF-EMF and 1800 MHz RF-EMF. A mouse spermatocyte-derived GC-2 cell line was intermittently (5 min on and 10 min off) exposed to 50 Hz ELF-EMF at an intensity of 1, 2 or 3 mT or to RF-EMF in GSM-Talk mode at the specific absorption rates (SAR) of 1, 2 or 4 W/kg. After exposure for 24 h, we found that neither ELF-EMF nor RF-EMF affected cell viability using Cell Counting Kit-8. Through the use of an alkaline comet assay and immunofluorescence against γ-H2AX foci, we found that ELF-EMF exposure resulted in a significant increase of DNA strand breaks at 3 mT, whereas RF-EMF exposure had insufficient energy to induce such effects. Using a formamidopyrimidine DNA glycosylase (FPG)-modified alkaline comet assay, we observed that RF-EMF exposure significantly induced oxidative DNA base damage at a SAR value of 4 W/kg, whereas ELF-EMF exposure did not. Our results suggest that both ELF-EMF and RF-EMF under the same experimental conditions may produce genotoxicity at relative high intensities, but they create different patterns of DNA damage. Therefore, the potential mechanisms underlying the genotoxicity of different frequency electromagnetic fields may be different.

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

PopulationMouse spermatocyte-derived GC-2 cell line

Sample sizeNot supplied

ExposureELF and RF · 1800 MHz · 4 W/kg · 24 h (intermittent: 5 min on/10 min off)

Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

Outcomes measured

Cell viability (Cell Counting Kit-8)
DNA strand breaks (alkaline comet assay)
γ-H2AX foci (immunofluorescence)
Oxidative DNA base damage (FPG-modified alkaline comet assay)

Limitations

In vitro cell-line study (mouse GC-2 cells), limiting direct inference to humans
Genotoxic effects observed only at the highest tested exposure levels (3 mT for ELF; 4 W/kg for RF)
Sample size and replication details not provided in abstract

View raw extracted JSON

{
  "study_type": "in_vitro",
  "exposure": {
    "band": "ELF and RF",
    "source": null,
    "frequency_mhz": 1800,
    "sar_wkg": 4,
    "duration": "24 h (intermittent: 5 min on/10 min off)"
  },
  "population": "Mouse spermatocyte-derived GC-2 cell line",
  "sample_size": null,
  "outcomes": [
    "Cell viability (Cell Counting Kit-8)",
    "DNA strand breaks (alkaline comet assay)",
    "γ-H2AX foci (immunofluorescence)",
    "Oxidative DNA base damage (FPG-modified alkaline comet assay)"
  ],
  "main_findings": "After 24 h intermittent exposure, neither 50 Hz ELF-EMF (1–3 mT) nor 1800 MHz RF-EMF (GSM-Talk; SAR 1–4 W/kg) affected cell viability. ELF-EMF increased DNA strand breaks at 3 mT, while RF-EMF did not induce strand breaks; RF-EMF induced oxidative DNA base damage at SAR 4 W/kg, while ELF-EMF did not.",
  "effect_direction": "mixed",
  "limitations": [
    "In vitro cell-line study (mouse GC-2 cells), limiting direct inference to humans",
    "Genotoxic effects observed only at the highest tested exposure levels (3 mT for ELF; 4 W/kg for RF)",
    "Sample size and replication details not provided in abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "ELF-EMF",
    "RF-EMF",
    "50 Hz",
    "1800 MHz",
    "GSM-Talk mode",
    "SAR",
    "GC-2 cells",
    "genotoxicity",
    "DNA strand breaks",
    "γ-H2AX",
    "oxidative DNA damage",
    "comet assay",
    "FPG"
  ],
  "suggested_hubs": [
    {
      "slug": "who-icnirp",
      "weight": 0.2,
      "reason": "Addresses genotoxicity from ELF and RF exposures relevant to health risk assessment discussions."
    }
  ]
}

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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: 10.1667/rr13851.1
PubMed: 25688995

Read the original paper →

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