Genetic damage in mammalian somatic cells exposed to radiofrequency radiation: a meta-analysis of data from 63 publications (1990-2005)

Abstract

During the last several decades, numerous researchers have examined the potential of in vitro and /or in vivo exposure of radiofrequency( RF) radiation to damage the genetic material in mammalian somatic cells. A meta-analysis of reported data was conducted to obtain a quantitative estimate ( with 95% confidence intervals) of genotoxicity in RF-radiation-exposed cells compared with sham-exposed/unexposed control cells. The extent of genotoxicity was assessed for various end points, including single- and double-strand breaks in the DNA, incidence of chromosomal aberrations, micronuclei and sister chromatid exchanges. Among the several variables in the experimental protocols used in individual investigations, the influence of three specific variables related to RF-radiation exposure characteristics was examined in the meta-analysis: frequency, specific absorption rate, and exposure as continuous-wave, pulsed-wave and occupationally exposed/cell phone users. The overall data indicated that (1) the difference between RF-radiation exposure was small with few exceptions; (2) at certain RF radiation exposure conditions, there were statistically significant increases in genotoxicity for some end points; and (3) the mean indices for chromosomal aberrations and micronuclei in RF-radiation -exposed and sham-/unexposed controls were within the spontaneous levels reported in the historical database. Considerable evidence for publication bias was found in the meta-analysis.

AI evidence extraction

Main findings

Across 63 publications, overall differences between RF-exposed and sham/unexposed controls were small with few exceptions. Under certain RF exposure conditions, statistically significant increases in genotoxicity were reported for some endpoints, but mean indices for chromosomal aberrations and micronuclei were within spontaneous historical levels. The meta-analysis found considerable evidence of publication bias.

Outcomes measured

• DNA single-strand breaks
• DNA double-strand breaks
• chromosomal aberrations
• micronuclei
• sister chromatid exchanges

Limitations

• Considerable evidence of publication bias
• Heterogeneity in experimental protocols across included investigations

Suggested hubs

• occupational-exposure (0.62)
  Meta-analysis explicitly includes occupationally exposed groups among exposure categories.

{
    "study_type": "meta_analysis",
    "exposure": {
        "band": "RF",
        "source": "occupational, mobile phone users, in vitro/in vivo experimental exposure",
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": null
    },
    "population": "mammalian somatic cells (in vitro and/or in vivo studies)",
    "sample_size": 63,
    "outcomes": [
        "DNA single-strand breaks",
        "DNA double-strand breaks",
        "chromosomal aberrations",
        "micronuclei",
        "sister chromatid exchanges"
    ],
    "main_findings": "Across 63 publications, overall differences between RF-exposed and sham/unexposed controls were small with few exceptions. Under certain RF exposure conditions, statistically significant increases in genotoxicity were reported for some endpoints, but mean indices for chromosomal aberrations and micronuclei were within spontaneous historical levels. The meta-analysis found considerable evidence of publication bias.",
    "effect_direction": "mixed",
    "limitations": [
        "Considerable evidence of publication bias",
        "Heterogeneity in experimental protocols across included investigations"
    ],
    "evidence_strength": "low",
    "confidence": 0.7800000000000000266453525910037569701671600341796875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "radiofrequency radiation",
        "RF",
        "genotoxicity",
        "meta-analysis",
        "DNA strand breaks",
        "chromosomal aberrations",
        "micronuclei",
        "sister chromatid exchanges",
        "specific absorption rate",
        "frequency",
        "continuous-wave",
        "pulsed-wave",
        "occupational exposure",
        "cell phone users",
        "publication bias"
    ],
    "suggested_hubs": [
        {
            "slug": "occupational-exposure",
            "weight": 0.61999999999999999555910790149937383830547332763671875,
            "reason": "Meta-analysis explicitly includes occupationally exposed groups among exposure categories."
        }
    ]
}

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