Prolonged 3.5 GHz and 24 GHz RF-EMF Exposure Alters Testicular Immune Balance, Apoptotic Gene Expression, and Sperm Function in Rats

Abstract

Category: Reproductive Toxicology Tags: RF-EMF, 5G, testicular function, apoptosis, sperm quality, immune response, reproductive health DOI: 10.3390/biomedicines13102471 URL: mdpi.com Overview The rapid expansion of 5G technology has increased concerns about the reproductive effects of radiofrequency electromagnetic fields (RF-EMF), particularly at mid-band (3.5 GHz) and millimeter-wave (24 GHz) frequencies. This study investigates how RF-EMF exposure affects testicular cytokines, apoptosis-related gene expression, and sperm quality in male rats. Methods - Male Sprague Dawley rats (n = 6 per group) were subjected to either 3.5 GHz or 24 GHz RF-EMF exposure for 60 days. - Exposure durations were set at 1 hour/day and 7 hours/day. Sham controls received identical housing but no exposure. - The study measured: - Testicular cytokines: IL-10, IL-6, IL-1β, and TNF-α - Apoptosis genes: Tp53, Bax, Bcl2, Casp3 (mRNA levels) - Sperm concentration, viability, and motility Findings - IL-10 significantly decreased in the 24 GHz-exposed groups for both 1-h and 7-h daily exposures. - TNF-α was also reduced at 24 GHz after 7 hours of daily exposure. - Casp3 expression increased and Tp53 decreased at 3.5 GHz (1-h duration). - Sperm concentration and viability were diminished at 24 GHz (7-h exposure), while sperm motility dropped at 3.5 GHz at both durations. Conclusion Chronic RF-EMF exposure at frequencies used in 5G technology leads to impaired sperm function via immune imbalance and activation of pro-apoptotic pathways. Notably, longer daily exposure increased the severity of all negative effects. There is a clear biological link between prolonged electromagnetic field exposure and adverse male reproductive health, underlying an important EMF safety concern for public awareness and further research.

AI evidence extraction

Main findings

In male rats exposed for 60 days, IL-10 decreased in 24 GHz groups at both 1 h/day and 7 h/day, and TNF-α decreased at 24 GHz with 7 h/day exposure. Casp3 increased and Tp53 decreased at 3.5 GHz (1 h/day). Sperm concentration and viability were reduced at 24 GHz (7 h/day), while sperm motility decreased at 3.5 GHz at both exposure durations.

Outcomes measured

• Testicular cytokines (IL-10, IL-6, IL-1β, TNF-α)
• Apoptosis-related gene expression (Tp53, Bax, Bcl2, Casp3 mRNA)
• Sperm concentration
• Sperm viability
• Sperm motility

Limitations

• SAR/dosimetry not reported in the provided abstract
• Small group size (n=6 per group)
• Animal study; generalizability to humans not established in the abstract

Suggested hubs

• 5g-policy (0.86)
  Study explicitly examines 5G-relevant frequencies (3.5 GHz and 24 GHz) and reproductive outcomes.

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    "study_type": "animal",
    "exposure": {
        "band": "RF",
        "source": "5G-related RF-EMF exposure (experimental)",
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": "60 days; 1 hour/day or 7 hours/day"
    },
    "population": "Male Sprague Dawley rats",
    "sample_size": 6,
    "outcomes": [
        "Testicular cytokines (IL-10, IL-6, IL-1β, TNF-α)",
        "Apoptosis-related gene expression (Tp53, Bax, Bcl2, Casp3 mRNA)",
        "Sperm concentration",
        "Sperm viability",
        "Sperm motility"
    ],
    "main_findings": "In male rats exposed for 60 days, IL-10 decreased in 24 GHz groups at both 1 h/day and 7 h/day, and TNF-α decreased at 24 GHz with 7 h/day exposure. Casp3 increased and Tp53 decreased at 3.5 GHz (1 h/day). Sperm concentration and viability were reduced at 24 GHz (7 h/day), while sperm motility decreased at 3.5 GHz at both exposure durations.",
    "effect_direction": "harm",
    "limitations": [
        "SAR/dosimetry not reported in the provided abstract",
        "Small group size (n=6 per group)",
        "Animal study; generalizability to humans not established in the abstract"
    ],
    "evidence_strength": "low",
    "confidence": 0.7800000000000000266453525910037569701671600341796875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "RF-EMF",
        "5G",
        "3.5 GHz",
        "24 GHz",
        "millimeter-wave",
        "testicular cytokines",
        "apoptosis",
        "Tp53",
        "Casp3",
        "sperm quality",
        "male fertility",
        "rats"
    ],
    "suggested_hubs": [
        {
            "slug": "5g-policy",
            "weight": 0.85999999999999998667732370449812151491641998291015625,
            "reason": "Study explicitly examines 5G-relevant frequencies (3.5 GHz and 24 GHz) and reproductive outcomes."
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}

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