Effects of prolonged exposure to 2.45 GHz electromagnetic fields on mouse health over a 5-month period

Abstract

With the ubiquitous and prolonged nature of human exposure to S-band electromagnetic fields (EMF, 2.45 GHz), concerns regarding its potential health impacts are growing. However, existing preclinical evidence is inconsistent, and a comprehensive assessment of its effects across multiple physiological systems is lacking. This study aimed to perform an integrated evaluation of the biological consequences of prolonged 2.45 GHz EMF exposure in mice, focusing on the reproductive, immune, metabolic, and hematopoietic systems. We established a murine model of prolonged EMF exposure, wherein mice were subjected to 2.45 GHz radiation (whole-body average specific absorption rate, SAR 15 W/kg) for 5 months. A combination of physiological monitoring, functional sperm analysis, comprehensive flow cytometry, hematopoietic stem cell functional assays, and metabolic challenge tests insulin tolerance test (ITT) and pyruvate tolerance test (PTT) was employed to assess systemic impacts. Our findings revealed a system-specific pattern of responses. Notably, prolonged EMF exposure did not induce measurable adverse effects on core physiological parameters, sperm functional integrity (kinematics and morphology), immune cell populations and distribution, or hematopoietic competence. In stark contrast, it significantly disrupted systemic glucose homeostasis, leading to elevated fasting blood glucose and impaired insulin sensitivity. This study demonstrates that biological effects of prolonged 2.45 GHz EMF exposure are not monolithic but exhibit distinct organ susceptibility. We identified a selective vulnerability in metabolic regulation, while reproductive, immune, and hematopoietic systems remained resilient under our specific exposure conditions. These findings challenge the universality of generalized toxicity claims, underscore the critical role of exposure parameters, and highlight metabolic dysfunction as a potential risk for prolonged EMF exposure, providing crucial insights for future risk assessment.

AI evidence extraction

Main findings

In mice exposed to 2.45 GHz electromagnetic fields at a whole-body average SAR of 15 W/kg for 5 months, no measurable adverse effects were reported for core physiological parameters, sperm functional integrity, immune cell populations, or hematopoietic competence. In contrast, exposure was associated with disrupted glucose homeostasis, including elevated fasting blood glucose and impaired insulin sensitivity.

Outcomes measured

• Core physiological parameters
• Sperm function (kinematics and morphology)
• Immune cell populations and distribution
• Hematopoietic competence
• Fasting blood glucose
• Insulin sensitivity
• Systemic glucose homeostasis

Limitations

• Animal study
• Abstract reports system-specific findings under specific exposure conditions
• Sample size not stated in the abstract

{
    "study_type": "animal",
    "exposure": {
        "band": "microwave",
        "source": "other",
        "frequency_mhz": 2450,
        "sar_wkg": 15,
        "duration": "5 months"
    },
    "population": "Mice",
    "sample_size": null,
    "outcomes": [
        "Core physiological parameters",
        "Sperm function (kinematics and morphology)",
        "Immune cell populations and distribution",
        "Hematopoietic competence",
        "Fasting blood glucose",
        "Insulin sensitivity",
        "Systemic glucose homeostasis"
    ],
    "main_findings": "In mice exposed to 2.45 GHz electromagnetic fields at a whole-body average SAR of 15 W/kg for 5 months, no measurable adverse effects were reported for core physiological parameters, sperm functional integrity, immune cell populations, or hematopoietic competence. In contrast, exposure was associated with disrupted glucose homeostasis, including elevated fasting blood glucose and impaired insulin sensitivity.",
    "effect_direction": "mixed",
    "limitations": [
        "Animal study",
        "Abstract reports system-specific findings under specific exposure conditions",
        "Sample size not stated in the abstract"
    ],
    "evidence_strength": "low",
    "confidence": 0.9499999999999999555910790149937383830547332763671875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "2.45 GHz",
        "S-band",
        "electromagnetic fields",
        "mouse",
        "SAR 15 W/kg",
        "prolonged exposure",
        "glucose homeostasis",
        "insulin sensitivity",
        "fasting blood glucose",
        "reproductive system",
        "immune system",
        "hematopoietic system",
        "metabolic dysfunction"
    ],
    "suggested_hubs": []
}

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