Radiofrequency radiation-induced calcium ion efflux enhancement from human and other neuroblastoma cells in culture

Abstract

To test the generality of radiofrequency radiation-induced changes in 45Ca2+ efflux from avian and feline brain tissues, human neuroblastoma cells were exposed to electromagnetic radiation at 147 MHz, amplitude-modulated (AM) at 16 Hz, at specific absorption rates (SAR) of 0.1, 0.05, 0.01, 0.005, 0.001, and 0.0005 W/kg. Significant 45Ca2+ efflux was obtained at SAR values of 0.05 and 0.005 W/kg. Enhanced efflux at 0.05 W/kg peaked at the 13-16 Hz and at the 57.5-60 Hz modulation ranges. A Chinese hamster-mouse hybrid neuroblastoma was also shown to exhibit enhanced radiation-induced 45Ca2+ efflux at an SAR of 0.05 W/kg, using 147 MHz, AM at 16 Hz. These results confirm that amplitude-modulated radiofrequency radiation can induce responses in cells of nervous tissue origin from widely different animal species, including humans. The results are also consistent with the reports of similar findings in avian and feline brain tissues and indicate the general nature of the phenomenon.

AI evidence extraction

Main findings

Human neuroblastoma cells exposed to 147 MHz radiofrequency radiation amplitude-modulated at 16 Hz showed significant 45Ca2+ efflux at SAR values of 0.05 and 0.005 W/kg. At 0.05 W/kg, enhanced efflux peaked at modulation ranges 13–16 Hz and 57.5–60 Hz. A Chinese hamster-mouse hybrid neuroblastoma also exhibited enhanced 45Ca2+ efflux at 0.05 W/kg with 147 MHz AM at 16 Hz.

Outcomes measured

• 45Ca2+ efflux (calcium ion efflux)

Limitations

• In vitro cell culture model; relevance to human health outcomes not addressed in abstract
• Exposure duration not reported in abstract
• Sample size and replication details not reported in abstract
• Only specific frequencies/modulation conditions tested

{
    "study_type": "in_vitro",
    "exposure": {
        "band": "RF",
        "source": null,
        "frequency_mhz": 147,
        "sar_wkg": 0.05000000000000000277555756156289135105907917022705078125,
        "duration": null
    },
    "population": "Human neuroblastoma cells in culture; Chinese hamster-mouse hybrid neuroblastoma cells in culture",
    "sample_size": null,
    "outcomes": [
        "45Ca2+ efflux (calcium ion efflux)"
    ],
    "main_findings": "Human neuroblastoma cells exposed to 147 MHz radiofrequency radiation amplitude-modulated at 16 Hz showed significant 45Ca2+ efflux at SAR values of 0.05 and 0.005 W/kg. At 0.05 W/kg, enhanced efflux peaked at modulation ranges 13–16 Hz and 57.5–60 Hz. A Chinese hamster-mouse hybrid neuroblastoma also exhibited enhanced 45Ca2+ efflux at 0.05 W/kg with 147 MHz AM at 16 Hz.",
    "effect_direction": "harm",
    "limitations": [
        "In vitro cell culture model; relevance to human health outcomes not addressed in abstract",
        "Exposure duration not reported in abstract",
        "Sample size and replication details not reported in abstract",
        "Only specific frequencies/modulation conditions tested"
    ],
    "evidence_strength": "low",
    "confidence": 0.7800000000000000266453525910037569701671600341796875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "radiofrequency radiation",
        "amplitude modulation",
        "147 MHz",
        "16 Hz",
        "SAR",
        "calcium efflux",
        "45Ca2+",
        "neuroblastoma",
        "in vitro"
    ],
    "suggested_hubs": []
}

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