Effects of paternal 5G RFR exposure on health of male offspring mice

Abstract

Category: Reproductive Toxicology, Epigenetics Tags: 5G, radiofrequency radiation, paternal exposure, epigenetics, sperm quality, anxiety behavior, intergenerational effects DOI: 10.1016/j.reprotox.2025.109139 URL: sciencedirect.com Overview With the widespread application of 5G communication technology, the potential health risks of radiofrequency radiation (RFR) have been paid much attention. Prior studies have demonstrated that the testes are highly sensitive to RFR, and notably, paternal epigenetic modifications can be transmitted to offspring, impacting their reproductive and neurobehavioral phenotypes. Study Design - Investigated intergenerational effects of paternal exposure to 5G RFR (4.9GHz) on health of male offspring in C57BL/6 mice. - Male mice were divided into Sham and 4.9GHz RFR groups (16 per group). - Exposed group received RFR for 1 hour/day over 42 consecutive days. - Male offspring from exposed and control fathers were raised to adulthood and assessed. Measures Assessed - Anxiety and depression-like behaviors - Learning and memory capabilities - Sperm quality - Fertility in male offspring - LRGUK gene methylation, mRNA, and protein expression Findings - Paternal 5G RFR exposure induced anxiety-like behaviors and impaired sperm quality in first-generation (F1) males. - These changes were potentially associated with RFR-induced hypermethylation of the paternal LRGUK gene and downregulation of its expression in offspring testes. - No significant effects were observed on depression-like behaviors, cognitive performance, or fertility across F1-F2 generations. Conclusion These findings indicate that paternal 5G RFR exposure induces intergenerational adverse effects on F1 male offspring, potentially mediated by germ cell epigenetic modifications. This study highlights a scientific link between 5G radiofrequency electromagnetic fields and biological health outcomes across generations. Evidence: Harm, Transgenerational effects: Chinese study finds paternal 5G exposure (4.9 GHz) affects male offspring health in mice. Anxiety-like behaviors and impaired sperm quality observed. Transgenerational Risk Alert Statement When an environmental exposure produces transgenerational biological effects—changes that appear in the offspring of exposed individuals through mechanisms such as sperm DNA damage, epigenetic alteration, or germ-line oxidative stress—it represents one of the strongest warning signals in toxicology and public health. Unlike short-term or reversible biological responses, germline impacts mean the exposure has penetrated the biological inheritance system itself. Damage occurring in sperm or ova does not end with the exposed individual; it has the potential to propagate altered developmental signals, genetic instability, or epigenetic dysregulation into future generations. For this reason, toxicology frameworks treat reproductive toxicity and transgenerational effects as indicators of extreme precautionary concern. When studies repeatedly demonstrate sperm DNA fragmentation, reduced fertility, altered embryonic development, or offspring abnormalities following exposure to a physical agent such as radiofrequency electromagnetic fields, the implication is not limited to the current population. It signals a potential risk to the biological continuity of future children. In practical terms, any exposure capable of altering the integrity or signaling environment of germ cells must be treated as a high-priority hazard, particularly when the exposure is widespread, chronic, and involves populations with heightened vulnerability such as adolescents, pregnant women, and developing fetuses. Transgenerational biological disruption is therefore not a marginal endpoint—it is a red-flag indicator that the exposure is interacting with the core biological architecture that carries life forward. When such signals appear in the scientific literature, the appropriate response is precaution, rigorous investigation, and protective policy—not dismissal. Evidence: high. In toxicology and reproductive biology, effects on germ cells are considered among the most critical warning signals, because they imply that an exposure can influence not just the exposed individual but the next generation. Thus, when oxidative stress mechanisms and high-certainty reproductive endpoints appear together in the evidence base, the risk profile changes dramatically. The concern is no longer limited to short-term physiological responses; it raises the possibility that chronic exposure could influence developmental outcomes, fertility patterns, and biological inheritance across generations. For that reason, germline and reproductive endpoints are often treated as sentinel indicators of extreme precautionary concern in environmental health risk assessment—particularly when the exposure is widespread, chronic, and affects populations such as adolescents, men of reproductive age, pregnant women, and developing children.

AI evidence extraction

Main findings

Paternal exposure to 5G RFR (4.9 GHz) induced anxiety-like behaviors and impaired sperm quality in first-generation male offspring mice, potentially mediated by hypermethylation and downregulation of the LRGUK gene. No significant effects were observed on depression-like behaviors, cognition, or fertility in offspring.

Outcomes measured

• anxiety-like behaviors in male offspring
• impaired sperm quality in male offspring
• LRGUK gene hypermethylation and downregulation in offspring testes
• no significant effects on depression-like behaviors
• no significant effects on cognitive performance
• no significant effects on fertility across F1-F2 generations

Limitations

• Study conducted in mice, limiting direct extrapolation to humans
• Only male offspring assessed, female offspring effects unknown
• Exposure parameters specific to 4.9 GHz and 1 hour/day for 42 days, may not represent typical human exposure

Suggested hubs

• 5g-policy (0.9)
  Study investigates health effects of 5G radiofrequency radiation exposure.

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    "study_type": "animal",
    "exposure": {
        "band": "RF",
        "source": "5G mobile communication",
        "frequency_mhz": 4900,
        "sar_wkg": null,
        "duration": "1 hour/day for 42 consecutive days"
    },
    "population": "C57BL/6 male mice and their male offspring",
    "sample_size": 32,
    "outcomes": [
        "anxiety-like behaviors in male offspring",
        "impaired sperm quality in male offspring",
        "LRGUK gene hypermethylation and downregulation in offspring testes",
        "no significant effects on depression-like behaviors",
        "no significant effects on cognitive performance",
        "no significant effects on fertility across F1-F2 generations"
    ],
    "main_findings": "Paternal exposure to 5G RFR (4.9 GHz) induced anxiety-like behaviors and impaired sperm quality in first-generation male offspring mice, potentially mediated by hypermethylation and downregulation of the LRGUK gene. No significant effects were observed on depression-like behaviors, cognition, or fertility in offspring.",
    "effect_direction": "harm",
    "limitations": [
        "Study conducted in mice, limiting direct extrapolation to humans",
        "Only male offspring assessed, female offspring effects unknown",
        "Exposure parameters specific to 4.9 GHz and 1 hour/day for 42 days, may not represent typical human exposure"
    ],
    "evidence_strength": "high",
    "confidence": 0.90000000000000002220446049250313080847263336181640625,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "5G",
        "radiofrequency radiation",
        "paternal exposure",
        "epigenetics",
        "sperm quality",
        "anxiety behavior",
        "intergenerational effects"
    ],
    "suggested_hubs": [
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            "reason": "Study investigates health effects of 5G radiofrequency radiation exposure."
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