RF Safe

In vitro effects of GSM modulated radiofrequency fields on human immune cells.

Bioelectromagnetics · 2006 · No effect · Low evidence

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No effectLow evidencePaper 5147

In vitro exposure to GSM-modulated RF fields at 1950 MHz (SAR 1 mW/g) for 8 hours produced no statistically significant effects on measured cytokine production, immune-relevant gene activity, or LAK cell cytotoxicity in samples from at least 15 donors.

Study snapshot

PublicationBioelectromagnetics · 2006
Study typein_vitro
Reported directionNo effect
Evidence ratingLow

Abstract

Despite the important role of the immune system in defending the body against infections and cancer, only few investigations on possible effects of radiofrequency (RF) radiation on function of human immune cells have been undertaken. Aim of the present investigation was therefore to assess whether GSM modulated RF fields have adverse effects on the functional competence of human immune cells. Within the frame of the multidisciplinary project "Biological effects of high frequency electromagnetic fields (EMF)" sponsored by the National Occupation Hazard Insurance Association (AUVA) in vitro investigations were carried out on human blood cells. Exposure was performed at GSM Basic 1950 MHz, an SAR of 1 mW/g in an intermittent mode (5 min "ON", 10 min "OFF") and a maximum Delta T of 0.06 degrees C for the duration of 8 h. The following immune parameters were evaluated: (1) the intracellular production of interleukin-2 (IL-2) and interferon (INF) gamma in lymphocytes, and IL-1 and tumor necrosis factor (TNF)-alpha in monocytes were evaluated with monoclonal antibodies. (2) The activity of immune-relevant genes (IL 1-alpha and beta, IL-2, IL-2-receptor, IL-4, macrophage colony stimulating factor (MCSF)-receptor, TNF-alpha, TNF-alpha-receptor) and housekeeping genes was analyzed with real time PCR. (3) The cytotoxicity of lymphokine activated killer cells (LAK cells) against a tumor cell line was determined in a flow cytometric test. For each parameter, blood samples of at least 15 donors were evaluated. No statistically significant effects of exposure were found and there is no indication that emissions from mobile phones are associated with adverse effects on the human immune system.

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 directionno_effect
PopulationHuman blood cells from donors (immune cells: lymphocytes, monocytes; LAK cells)
Sample size15
ExposureRF · 1950 MHz · 1 W/kg · 8 h (intermittent 5 min ON/10 min OFF)
Evidence strengthLowConfidence: 86% · Peer reviewed: yes

Main findings

In vitro exposure to GSM-modulated RF fields at 1950 MHz (SAR 1 mW/g) for 8 hours produced no statistically significant effects on measured cytokine production, immune-relevant gene activity, or LAK cell cytotoxicity in samples from at least 15 donors.

Outcomes measured

  • Intracellular cytokine production in lymphocytes (IL-2, IFN-gamma)
  • Intracellular cytokine production in monocytes (IL-1, TNF-alpha)
  • Gene expression/activity (IL-1 alpha/beta, IL-2, IL-2 receptor, IL-4, MCSF receptor, TNF-alpha, TNF-alpha receptor; housekeeping genes)
  • Cytotoxicity of lymphokine activated killer (LAK) cells against a tumor cell line

Limitations

  • In vitro study (may not reflect in vivo immune responses)
  • Only one exposure condition reported (1950 MHz, SAR 1 mW/g, intermittent, 8 h)
  • Sample size described as 'at least 15 donors' without further detail
View raw extracted JSON
{
  "study_type": "in_vitro",
  "exposure": {
    "band": "RF",
    "source": "mobile phone",
    "frequency_mhz": 1950,
    "sar_wkg": 1,
    "duration": "8 h (intermittent 5 min ON/10 min OFF)"
  },
  "population": "Human blood cells from donors (immune cells: lymphocytes, monocytes; LAK cells)",
  "sample_size": 15,
  "outcomes": [
    "Intracellular cytokine production in lymphocytes (IL-2, IFN-gamma)",
    "Intracellular cytokine production in monocytes (IL-1, TNF-alpha)",
    "Gene expression/activity (IL-1 alpha/beta, IL-2, IL-2 receptor, IL-4, MCSF receptor, TNF-alpha, TNF-alpha receptor; housekeeping genes)",
    "Cytotoxicity of lymphokine activated killer (LAK) cells against a tumor cell line"
  ],
  "main_findings": "In vitro exposure to GSM-modulated RF fields at 1950 MHz (SAR 1 mW/g) for 8 hours produced no statistically significant effects on measured cytokine production, immune-relevant gene activity, or LAK cell cytotoxicity in samples from at least 15 donors.",
  "effect_direction": "no_effect",
  "limitations": [
    "In vitro study (may not reflect in vivo immune responses)",
    "Only one exposure condition reported (1950 MHz, SAR 1 mW/g, intermittent, 8 h)",
    "Sample size described as 'at least 15 donors' without further detail"
  ],
  "evidence_strength": "low",
  "confidence": 0.86,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "GSM",
    "radiofrequency",
    "1950 MHz",
    "SAR",
    "human immune cells",
    "lymphocytes",
    "monocytes",
    "cytokines",
    "gene expression",
    "LAK cell cytotoxicity",
    "in vitro"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.25,
      "reason": "Study conducted within a project sponsored by a national occupational hazard insurance association; however the exposure itself is framed as mobile-phone-like GSM RF."
    }
  ]
}
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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: 10.1002/bem.20191
PubMed: 16342197

Read the original paper →

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