Reactive oxygen species formation and apoptosis in human peripheral blood mononuclear cell induced by 900 MHz mobile phone radiation

Abstract

We demonstrate that reactive oxygen species (ROS) plays an important role in the process of apoptosis in human peripheral blood mononuclear cell (PBMC) which is induced by the radiation of 900 MHz radiofrequency electromagnetic field (RFEMF) at a specific absorption rate (SAR) of ~0.4 W/kg when the exposure lasts longer than two hours. The apoptosis is induced through the mitochondrial pathway and mediated by activating ROS and caspase-3, and decreasing the mitochondrial potential. The activation of ROS is triggered by the conformation disturbance of lipids, protein, and DNA induced by the exposure of GSM RFEMF. Although human PBMC was found to have a self-protection mechanism of releasing carotenoid in response to oxidative stress to lessen the further increase of ROS, the imbalance between the antioxidant defenses and ROS formation still results in an increase of cell death with the exposure time and can cause about 37% human PBMC death in eight hours.

AI evidence extraction

Main findings

In human PBMC exposed in vitro to 900 MHz GSM RF electromagnetic fields at approximately 0.4 W/kg, the abstract reports increased ROS and apoptosis when exposure lasted longer than 2 hours. Apoptosis was described as occurring through a mitochondrial pathway involving ROS and caspase-3 activation, decreased mitochondrial potential, and increasing cell death with exposure time, reaching about 37% cell death at 8 hours.

Outcomes measured

• Reactive oxygen species (ROS) formation
• Apoptosis
• Caspase-3 activation
• Mitochondrial membrane potential decrease
• Cell death
• Oxidative stress response/carotenoid release

Limitations

• In vitro study
• Sample size not reported in the abstract
• Exposure details are limited in the abstract
• Findings are based on cellular endpoints rather than clinical health outcomes

{
    "study_type": "in_vitro",
    "exposure": {
        "band": "RF",
        "source": "mobile phone",
        "frequency_mhz": 900,
        "sar_wkg": 0.40000000000000002220446049250313080847263336181640625,
        "duration": "Longer than 2 hours; up to 8 hours"
    },
    "population": "Human peripheral blood mononuclear cells (PBMC)",
    "sample_size": null,
    "outcomes": [
        "Reactive oxygen species (ROS) formation",
        "Apoptosis",
        "Caspase-3 activation",
        "Mitochondrial membrane potential decrease",
        "Cell death",
        "Oxidative stress response/carotenoid release"
    ],
    "main_findings": "In human PBMC exposed in vitro to 900 MHz GSM RF electromagnetic fields at approximately 0.4 W/kg, the abstract reports increased ROS and apoptosis when exposure lasted longer than 2 hours. Apoptosis was described as occurring through a mitochondrial pathway involving ROS and caspase-3 activation, decreased mitochondrial potential, and increasing cell death with exposure time, reaching about 37% cell death at 8 hours.",
    "effect_direction": "harm",
    "limitations": [
        "In vitro study",
        "Sample size not reported in the abstract",
        "Exposure details are limited in the abstract",
        "Findings are based on cellular endpoints rather than clinical health outcomes"
    ],
    "evidence_strength": "low",
    "confidence": 0.9499999999999999555910790149937383830547332763671875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "900 MHz",
        "RFEMF",
        "GSM",
        "mobile phone radiation",
        "PBMC",
        "reactive oxygen species",
        "ROS",
        "apoptosis",
        "mitochondrial pathway",
        "caspase-3",
        "oxidative stress",
        "cell death"
    ],
    "suggested_hubs": []
}

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