Male Reproductive and Cellular Damage After Prenatal 3.5 GHz Radiation Exposure: One-Year Postnatal Effects

Abstract

Category: Reproductive Toxicology Tags: radiofrequency radiation, prenatal exposure, reproductive toxicity, testicular damage, apoptosis, DNA damage, EMF safety DOI: 10.1111/nyas.70116 URL: nyaspubs.onlinelibrary.wiley.com Overview This study investigates the long-term effects of prenatal exposure to 3.5 GHz radiofrequency radiation (RFR) on male reproductive health. Pregnant Wistar Hannover rats were divided into sham control, full-gestation exposure (3T RFR), and late-gestation exposure (2T RFR) groups (2 hours/day). Male offspring were euthanized at 12 months for testicular analysis. Findings - Seminiferous tubule diameter and epithelial height were significantly reduced in the 3T RFR group compared to controls (adjusted p = 0.03 and 9.71 × 10-8). - Lower Johnsen scores indicated impaired spermatogenesis (adjusted p = 0.022). - Abnormal sperm morphology increased significantly (adjusted p = 0.036). - γ-H2AX immunostaining scores were elevated in the 2T and 3T groups, indicating increased DNA damage (adjusted p = 0.012 and 6.36 × 10-9). - Beclin-1 expression was significantly higher in the 3T group, suggesting increased autophagy (adjusted p = 8.55 × 10-4 and 4.51 × 10-6). - TUNEL-positive cell counts and apoptosis index were both significantly higher in RFR-exposed groups than in sham controls (adjusted p values showed extremely strong significance). Conclusion The study demonstrates that prenatal exposure to 3.5 GHz RFR causes persistent testicular damage, impaired spermatogenesis, increased DNA damage, autophagy, and apoptosis in adult male rats. Importantly, these adverse health effects were evident even though the rats had no postnatal EMR exposure for a year. Full gestation exposure had the most pronounced effects. These findings reveal a clear link between prenatal EMF exposure and later-life reproductive toxicity. Additional molecular and cellular studies are necessary to further elucidate mechanisms and reinforce evidence-based guidelines for EMF safety. Considering the widespread use of 3.5 GHz RFR (such as from mobile phones), precautionary actions to protect reproductive health are strongly recommended. Limitations: Sperm motility and organ weights were not measured in this study. Future research will address these parameters and assess additional time points post-exposure. Such ongoing research is critical for safeguarding human and animal reproductive health against electromagnetic field exposure.

AI evidence extraction

Main findings

Compared with sham controls, prenatal 3.5 GHz RFR exposure was associated with reduced seminiferous tubule diameter and epithelial height and lower Johnsen scores in the full-gestation exposure group, and increased abnormal sperm morphology. Both exposure groups showed higher γ-H2AX immunostaining, increased TUNEL-positive cells, and higher apoptosis index; Beclin-1 expression was higher in the full-gestation exposure group.

Outcomes measured

• Seminiferous tubule diameter
• Seminiferous epithelial height
• Johnsen score
• Sperm morphology (abnormal morphology)
• γ-H2AX immunostaining (DNA damage marker)
• Beclin-1 expression (autophagy marker)
• TUNEL-positive cell counts
• Apoptosis index
• Testicular damage / impaired spermatogenesis

Suggested hubs

• 5g-policy (0.6)
  Exposure frequency is 3.5 GHz, commonly used for 5G; study evaluates biological effects at this band.

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    "study_type": "animal",
    "exposure": {
        "band": "RF",
        "source": null,
        "frequency_mhz": 3500,
        "sar_wkg": null,
        "duration": "Prenatal exposure during full gestation (3T) or late gestation (2T), 2 h/day; outcomes assessed at 12 months postnatal"
    },
    "population": "Pregnant Wistar Hannover rats and male offspring (assessed at 12 months)",
    "sample_size": null,
    "outcomes": [
        "Seminiferous tubule diameter",
        "Seminiferous epithelial height",
        "Johnsen score",
        "Sperm morphology (abnormal morphology)",
        "γ-H2AX immunostaining (DNA damage marker)",
        "Beclin-1 expression (autophagy marker)",
        "TUNEL-positive cell counts",
        "Apoptosis index",
        "Testicular damage / impaired spermatogenesis"
    ],
    "main_findings": "Compared with sham controls, prenatal 3.5 GHz RFR exposure was associated with reduced seminiferous tubule diameter and epithelial height and lower Johnsen scores in the full-gestation exposure group, and increased abnormal sperm morphology. Both exposure groups showed higher γ-H2AX immunostaining, increased TUNEL-positive cells, and higher apoptosis index; Beclin-1 expression was higher in the full-gestation exposure group.",
    "effect_direction": "harm",
    "limitations": [],
    "evidence_strength": "low",
    "confidence": 0.7800000000000000266453525910037569701671600341796875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "3.5 GHz",
        "radiofrequency radiation",
        "prenatal exposure",
        "Wistar Hannover rat",
        "testis",
        "spermatogenesis",
        "DNA damage",
        "γ-H2AX",
        "autophagy",
        "Beclin-1",
        "apoptosis",
        "TUNEL"
    ],
    "suggested_hubs": [
        {
            "slug": "5g-policy",
            "weight": 0.59999999999999997779553950749686919152736663818359375,
            "reason": "Exposure frequency is 3.5 GHz, commonly used for 5G; study evaluates biological effects at this band."
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}

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