Transgenerational changes in Daphnia magna under radio frequency radiation in the juvenile and puberty period

Abstract

Transgenerational changes in Daphnia magna under radio frequency radiation in the juvenile and puberty period Sarapultseva EI, Uskalova DV, Ustenko KV, Tikhonov VN, Ivanov IA, Tikhonov AV. Transgenerational changes in Daphnia magna under radio frequency radiation in the juvenile and puberty period. Int J Radiat Biol. 2022 Jun 8:1-31. doi: 10.1080/09553002.2022.2087928. Abstract Purpose To analyze the results of direct and transgenerational effects of radio frequency electromagnetic fields (RF-EMF) on the model organism of crustaceans Daphnia magna. Materials and Methods D. magna were chronically exposed at 900 GHz EMF with an energy flux density (EFD) of about 1 mW/cm2 in the juvenile and pubertal periods of their ontogenesis. The cytotoxicity of exposure as well as survival, fertility and teratogenic effect of directly exposed daphnids and their progeny across three generations were analyzed. Results and Conclusions The results of our study show that exposure of RF-EMF at juvenile period can significantly affect the fertility and size of irradiated daphnids and their offspring of the first generation. The decrease in fertility may be associated with a cytotoxic effect on the cells of irradiated animals. The reduction in the size of the spike and the body of individuals is an indicator of the negative impact of radiation on the protective strategy of the crustacean population. The reproductive process is restored by the second generation. The results of our study provide further insights into the possible mechanisms underlying the in vivo effects of RF-EMF. pubmed.ncbi.nlm.nih.gov

AI evidence extraction

Main findings

Chronic RF-EMF exposure during the juvenile period significantly affected fertility and size of exposed D. magna and their first-generation offspring. Decreased fertility was suggested to be associated with cytotoxic effects in irradiated animals, and reduced terminal spine/body size indicated negative impacts on protective strategy. Reproductive parameters were reported to be restored by the second generation.

Outcomes measured

• cytotoxicity
• survival
• fertility
• teratogenic effects
• body size
• terminal spine size
• transgenerational effects across three generations

Limitations

• Sample size not reported in abstract
• Exposure metric reported as energy flux density; SAR not provided
• Details of exposure setup and control conditions not described in abstract
• Quantitative effect sizes and statistical details not provided in abstract

{
    "study_type": "animal",
    "exposure": {
        "band": "RF",
        "source": null,
        "frequency_mhz": 900000,
        "sar_wkg": null,
        "duration": "chronic exposure during juvenile and pubertal periods"
    },
    "population": "Daphnia magna (crustacean model organism)",
    "sample_size": null,
    "outcomes": [
        "cytotoxicity",
        "survival",
        "fertility",
        "teratogenic effects",
        "body size",
        "terminal spine size",
        "transgenerational effects across three generations"
    ],
    "main_findings": "Chronic RF-EMF exposure during the juvenile period significantly affected fertility and size of exposed D. magna and their first-generation offspring. Decreased fertility was suggested to be associated with cytotoxic effects in irradiated animals, and reduced terminal spine/body size indicated negative impacts on protective strategy. Reproductive parameters were reported to be restored by the second generation.",
    "effect_direction": "harm",
    "limitations": [
        "Sample size not reported in abstract",
        "Exposure metric reported as energy flux density; SAR not provided",
        "Details of exposure setup and control conditions not described in abstract",
        "Quantitative effect sizes and statistical details not provided in abstract"
    ],
    "evidence_strength": "low",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "RF-EMF",
        "radio frequency radiation",
        "Daphnia magna",
        "transgenerational",
        "fertility",
        "cytotoxicity",
        "teratogenicity",
        "energy flux density",
        "juvenile period",
        "puberty period"
    ],
    "suggested_hubs": []
}

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