RF Safe

Effect of 900 MHz Electromagnetic Radiation on the Induction of ROS in Human Peripheral Blood Mononuclear Cells.

Journal of biomedical physics & engineering · 2015 · Mixed · Low evidence

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MixedLow evidencePaper 4744

After 2-hour exposure to 900 MHz GSM RF from a mobile phone simulator, ROS production significantly increased in the PBMC population rich in monocytes. The increase was not significant in the PBMC population rich in lymphocytes compared with non-exposed cells.

Study snapshot

PublicationJournal of biomedical physics & engineering · 2015
Study typeother
Reported directionMixed
Evidence ratingLow

Abstract

BACKGROUND: Despite numerous studies over a decade, it still remains controversial about the biological effects of RF EMF emitted by mobile phone telephony. OBJECTIVE: Here we investigated the effect of 900 MHz GSM on the induction of oxidative stress and the level of intracellular reactive oxygen species (ROS) in human mononuclear cells, monocytes and lymphocytes as defence system cells. METHOD: 6 ml Peripheral Blood samples were obtained from 13 healthy volunteers (21-30 year-old). Each sample was devided into 2 groups: one was exposed RF radiation emitted from a mobile phone simulator for 2 hour and the other used as control group which was not exposed to any fields. After that, mononuclear cells were isolated from peripheral blood by density gradient centrifugation in Ficoll-Paque. The intracellular ROS content in monocytes and lymphocytes was measured by the CM-H2DCFDA fluorescence probe using flowcytometry technique. RESULTS: Our results showed significant increase in  ROS production after exposure in population rich in monocytes. This effect was not significant in population rich in lymphocytes in comparison with non exposed cells. CONCLUSION: The results obtained in this study clearly showed the oxidative stress induction capability of RF electromagnetic field in the portion of PBMCs mostly in monocytes, like the case of exposure to micro organisms, although the advantages or disadvantages of this effect should be evaluated.

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 typeother
Effect directionmixed
Population13 healthy volunteers (21–30 year-old); human peripheral blood mononuclear cells (PBMCs), monocytes and lymphocytes
Sample size13
ExposureRF · 900 MHz · 2 hour
Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

After 2-hour exposure to 900 MHz GSM RF from a mobile phone simulator, ROS production significantly increased in the PBMC population rich in monocytes. The increase was not significant in the PBMC population rich in lymphocytes compared with non-exposed cells.

Outcomes measured

  • Intracellular reactive oxygen species (ROS) in monocytes
  • Intracellular reactive oxygen species (ROS) in lymphocytes
  • Oxidative stress induction in PBMC fractions

Limitations

  • Small sample size (13 volunteers)
  • Exposure metric details (e.g., SAR/dosimetry) not reported in the abstract
  • Short exposure duration (2 hours)
  • Outcome assessed ex vivo in isolated cell populations rather than clinical endpoints
View raw extracted JSON
{
  "study_type": "other",
  "exposure": {
    "band": "RF",
    "source": "mobile phone simulator",
    "frequency_mhz": 900,
    "sar_wkg": null,
    "duration": "2 hour"
  },
  "population": "13 healthy volunteers (21–30 year-old); human peripheral blood mononuclear cells (PBMCs), monocytes and lymphocytes",
  "sample_size": 13,
  "outcomes": [
    "Intracellular reactive oxygen species (ROS) in monocytes",
    "Intracellular reactive oxygen species (ROS) in lymphocytes",
    "Oxidative stress induction in PBMC fractions"
  ],
  "main_findings": "After 2-hour exposure to 900 MHz GSM RF from a mobile phone simulator, ROS production significantly increased in the PBMC population rich in monocytes. The increase was not significant in the PBMC population rich in lymphocytes compared with non-exposed cells.",
  "effect_direction": "mixed",
  "limitations": [
    "Small sample size (13 volunteers)",
    "Exposure metric details (e.g., SAR/dosimetry) not reported in the abstract",
    "Short exposure duration (2 hours)",
    "Outcome assessed ex vivo in isolated cell populations rather than clinical endpoints"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "900 MHz",
    "GSM",
    "RF EMF",
    "mobile phone simulator",
    "PBMC",
    "monocytes",
    "lymphocytes",
    "reactive oxygen species",
    "ROS",
    "oxidative stress",
    "flow cytometry",
    "CM-H2DCFDA"
  ],
  "suggested_hubs": [
    {
      "slug": "mobile-phones-rf",
      "weight": 0.86,
      "reason": "Study tests 900 MHz GSM exposure from a mobile phone simulator and measures biological effects in human blood cells."
    }
  ]
}
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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: 26396966

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