5G-exposed human skin cells do not respond with altered gene expression and methylation profiles

PNAS Nexus · 2025 · No effect · Moderate evidence

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No effectModerate evidencePaper 2630

Study snapshot

PublicationPNAS Nexus · 2025

Study typein_vitro

Reported directionNo effect

Evidence ratingModerate

Abstract

Category: Cellular Biology Institution: Bundesamt für Strahlenschutz Tags: 5G, electromagnetic fields, human skin cells, gene expression, DNA methylation, fibroblasts, keratinocytes DOI: 10.1093/pnasnexus/pgaf127 URL: academic.oup.com Overview The rapid increase in wirelessly transmitted data necessitates the development of new transmission standards and use of higher frequencies, specifically within the 5G band. Despite basic biophysical arguments suggesting minimal health risks, public concern persists regarding this technology's potential effects. Study Design - Human skin cells, including fibroblasts and keratinocytes, were exposed to electromagnetic fields up to ten times the permissible limits. - Exposure durations were 2 hours and 48 hours using a fully blinded experimental approach. - Sham-exposed cells acted as negative controls, while UV-exposed cells were the positive controls. Findings Differences noted in gene expression and DNA methylation profiles resulting from electromagnetic field exposure were found to be minor and consistent with random chance, rather than EMF-induced cellular effects. Conclusion These results strongly support the assessment that, under the tested conditions, there is no evidence for exposure-induced damage or health risk for human skin cells based on gene expression and methylation metrics.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typein_vitro

Effect directionno_effect

PopulationHuman skin cells (fibroblasts and keratinocytes)

Sample sizeNot supplied

ExposureRF · 2 hours and 48 hours

Evidence strengthModerateConfidence: 74% · Peer reviewed: yes

Main findings

In fibroblasts and keratinocytes exposed to electromagnetic fields described as within the 5G band (up to ten times permissible limits) for 2 hours or 48 hours, observed differences in gene expression and DNA methylation were minor and consistent with random chance. The study reports no evidence of exposure-induced damage or health risk for human skin cells based on these metrics under the tested conditions.

Outcomes measured

gene expression
DNA methylation profiles

Limitations

Specific exposure parameters (e.g., frequency, modulation, dosimetry/SAR) not reported in the provided abstract.
Sample size and replication details not reported in the provided abstract.
Outcomes limited to gene expression and DNA methylation; other cellular endpoints not described in the provided abstract.

View raw extracted JSON

{
  "study_type": "in_vitro",
  "exposure": {
    "band": "RF",
    "source": "5G",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "2 hours and 48 hours"
  },
  "population": "Human skin cells (fibroblasts and keratinocytes)",
  "sample_size": null,
  "outcomes": [
    "gene expression",
    "DNA methylation profiles"
  ],
  "main_findings": "In fibroblasts and keratinocytes exposed to electromagnetic fields described as within the 5G band (up to ten times permissible limits) for 2 hours or 48 hours, observed differences in gene expression and DNA methylation were minor and consistent with random chance. The study reports no evidence of exposure-induced damage or health risk for human skin cells based on these metrics under the tested conditions.",
  "effect_direction": "no_effect",
  "limitations": [
    "Specific exposure parameters (e.g., frequency, modulation, dosimetry/SAR) not reported in the provided abstract.",
    "Sample size and replication details not reported in the provided abstract.",
    "Outcomes limited to gene expression and DNA methylation; other cellular endpoints not described in the provided abstract."
  ],
  "evidence_strength": "moderate",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "5G",
    "electromagnetic fields",
    "human skin cells",
    "fibroblasts",
    "keratinocytes",
    "gene expression",
    "DNA methylation",
    "blinded",
    "sham control",
    "UV positive control"
  ],
  "suggested_hubs": [
    {
      "slug": "5g-policy",
      "weight": 0.6,
      "reason": "Study explicitly evaluates cellular effects from exposure described as within the 5G band."
    }
  ]
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1093/pnasnexus/pgaf127
PubMed: Not supplied

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