RF Safe

Cytotoxic and genotoxic effects of high-frequency electromagnetic fields (GSM 1800 MHz) on immature and mature rats.

Ecotoxicology and environmental safety · 2012 · Harm · Low evidence

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HarmLow evidencePaper 4542

Rats exposed to 1800 MHz EMF for 45 days showed significant differences in chromosome aberrations, micronucleus frequency, mitotic index, and PCE ratio in all treatment groups. Cytogenotoxic damage was more pronounced in immature rats, and a 15-day recovery p…

Study snapshot

PublicationEcotoxicology and environmental safety · 2012
Study typeanimal
Reported directionHarm
Evidence ratingLow

Abstract

We investigated the cytogenotoxic effects of high frequency electromagnetic fields (HF-EMF) for 45 day and the effect of a recovery period of 15 day after exposure to EMF on bone marrow cells of immature and mature rats. The animals in treatment groups were exposed to 1800 MHz EMF at SAR of 0.37 W/kg and 0.49 W/kg for 2h/day for 45 day. Two recovery groups were kept for a recovery period of 15 day without EMF after exposure to HF-EMF. Two control groups for both immature and mature rats were also included. Significant differences were also observed in chromosome aberrations (CA), micronucleus (MN) frequency, mitotic index (MI) and ratio of polychromatic erythrocytes (PCEs) in all treatment groups. The cytogenotoxic damage was more remarkable in immature rats and, the recovery period did not improve this damage in immature rats. Because much higher and irreversible cytogenotoxic damage was observed in immature rats than in mature rats, further studies are needed to understand effects of EMF on DNA damage and DNA repair, and to determine safe limits for environment and human, especially for children.

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 typeanimal
Effect directionharm
PopulationImmature and mature rats (bone marrow cells assessed)
Sample sizeNot supplied
ExposureRF · 1800 MHz · 2 h/day for 45 days; recovery period 15 days without EMF (in recovery groups)
Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

Rats exposed to 1800 MHz EMF for 45 days showed significant differences in chromosome aberrations, micronucleus frequency, mitotic index, and PCE ratio in all treatment groups. Cytogenotoxic damage was more pronounced in immature rats, and a 15-day recovery period did not improve the damage in immature rats.

Outcomes measured

  • Chromosome aberrations (CA)
  • Micronucleus (MN) frequency
  • Mitotic index (MI)
  • Ratio of polychromatic erythrocytes (PCEs)

Limitations

  • Sample size not reported in the provided abstract
  • Exposure source/setup details not described in the provided abstract
  • Results are reported as 'significant differences' without effect sizes or exact statistics in the provided abstract
View raw extracted JSON
{
  "study_type": "animal",
  "exposure": {
    "band": "RF",
    "source": null,
    "frequency_mhz": 1800,
    "sar_wkg": null,
    "duration": "2 h/day for 45 days; recovery period 15 days without EMF (in recovery groups)"
  },
  "population": "Immature and mature rats (bone marrow cells assessed)",
  "sample_size": null,
  "outcomes": [
    "Chromosome aberrations (CA)",
    "Micronucleus (MN) frequency",
    "Mitotic index (MI)",
    "Ratio of polychromatic erythrocytes (PCEs)"
  ],
  "main_findings": "Rats exposed to 1800 MHz EMF for 45 days showed significant differences in chromosome aberrations, micronucleus frequency, mitotic index, and PCE ratio in all treatment groups. Cytogenotoxic damage was more pronounced in immature rats, and a 15-day recovery period did not improve the damage in immature rats.",
  "effect_direction": "harm",
  "limitations": [
    "Sample size not reported in the provided abstract",
    "Exposure source/setup details not described in the provided abstract",
    "Results are reported as 'significant differences' without effect sizes or exact statistics in the provided abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "1800 MHz",
    "GSM",
    "RF-EMF",
    "SAR",
    "rat",
    "bone marrow",
    "cytotoxicity",
    "genotoxicity",
    "chromosome aberrations",
    "micronucleus",
    "mitotic index",
    "polychromatic erythrocytes",
    "recovery period"
  ],
  "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.ecoenv.2012.02.028
PubMed: 22405939

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