Tumor promotion by exposure to radiofrequency electromagnetic fields below exposure limits for humans.

Biochemical and biophysical research communications · 2015 · Harm · Low evidence

← Research stream

HarmLow evidencePaper 4789

In a replication study in carcinogen-treated mice exposed at 0 (sham), 0.04, 0.4, and 2 W/kg SAR, numbers of lung and liver tumors were significantly higher in exposed groups than in sham controls. Lymphomas were also significantly elevated in exposed animals…

Study snapshot

PublicationBiochemical and biophysical research communications · 2015

Study typeanimal

Reported directionHarm

Evidence ratingLow

Abstract

The vast majority of in vitro and in vivo studies did not find cancerogenic effects of exposure to electromagnetic fields (RF-EMF), i.e. emitted by mobile phones and base stations. Previously published results from a pilot study with carcinogen-treated mice, however, suggested tumor-promoting effects of RF-EMF (Tillmann et al., 2010). We have performed a replication study using higher numbers of animals per group and including two additional exposure levels (0 (sham), 0.04, 0.4 and 2 W/kg SAR). We could confirm and extend the originally reported findings. Numbers of tumors of the lungs and livers in exposed animals were significantly higher than in sham-exposed controls. In addition, lymphomas were also found to be significantly elevated by exposure. A clear dose-response effect is absent. We hypothesize that these tumor-promoting effects may be caused by metabolic changes due to exposure. Since many of the tumor-promoting effects in our study were seen at low to moderate exposure levels (0.04 and 0.4 W/kg SAR), thus well below exposure limits for the users of mobile phones, further studies are warranted to investigate the underlying mechanisms. Our findings may help to understand the repeatedly reported increased incidences of brain tumors in heavy users of mobile phones.

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

PopulationCarcinogen-treated mice

Sample sizeNot supplied

ExposureRF · 2 W/kg

Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

Outcomes measured

Tumor numbers (lungs)
Tumor numbers (liver)
Lymphoma incidence

Limitations

Sample size not reported in abstract
RF frequency and other exposure parameters not reported in abstract
No clear dose-response relationship observed
Mechanism not established (metabolic changes proposed as a hypothesis)

View raw extracted JSON

{
  "study_type": "animal",
  "exposure": {
    "band": "RF",
    "source": "other",
    "frequency_mhz": null,
    "sar_wkg": 2,
    "duration": null
  },
  "population": "Carcinogen-treated mice",
  "sample_size": null,
  "outcomes": [
    "Tumor numbers (lungs)",
    "Tumor numbers (liver)",
    "Lymphoma incidence"
  ],
  "main_findings": "In a replication study in carcinogen-treated mice exposed at 0 (sham), 0.04, 0.4, and 2 W/kg SAR, numbers of lung and liver tumors were significantly higher in exposed groups than in sham controls. Lymphomas were also significantly elevated in exposed animals, and a clear dose-response was absent.",
  "effect_direction": "harm",
  "limitations": [
    "Sample size not reported in abstract",
    "RF frequency and other exposure parameters not reported in abstract",
    "No clear dose-response relationship observed",
    "Mechanism not established (metabolic changes proposed as a hypothesis)"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "radiofrequency electromagnetic fields",
    "RF-EMF",
    "specific absorption rate",
    "SAR",
    "tumor promotion",
    "carcinogen-treated mice",
    "lung tumors",
    "liver tumors",
    "lymphoma",
    "mobile phones",
    "base stations"
  ],
  "suggested_hubs": [
    {
      "slug": "who-icnirp",
      "weight": 0.6,
      "reason": "Study explicitly discusses exposures below human exposure limits and compares to mobile phone user limits."
    },
    {
      "slug": "5g-policy",
      "weight": 0.15,
      "reason": "Mentions exposure limits for mobile phone users, but no 5G/mmWave specifics are provided."
    }
  ]
}

AI can be wrong. Always verify against the paper.

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.bbrc.2015.02.151
PubMed: 25749340

Read the original paper →

Related papers

← Back to the Research Library