Effects of global system for mobile communications 1800 MHz radiofrequency electromagnetic fields on gene and protein expression in MCF-7 cells.

Proteomics · 2006 · No effect · Low evidence

← Research stream

No effectLow evidencePaper 5110

Study snapshot

PublicationProteomics · 2006

Study typein_vitro

Reported directionNo effect

Evidence ratingLow

Abstract

Despite many studies over a decade, it still remains ambiguous as to the real biological effects induced by radiofrequency electromagnetic fields (RF EMF) utilized in mobile telephony. Here we investigated global gene and protein responses to RF EMF simulating the Global System for Mobile Communications (GSM) 1800 MHz signal in human breast cancer cell line MCF-7 using genomic and proteomic approaches. GeneChip analysis identified a handful of consistent changed genes after exposure to RF EMF at specific absorption rates (SAR) of up to 3.5 W/kg for 24 h. However, these differentially transcribed genes could not be further confirmed by real-time RT-PCR assay. Meanwhile, systematic proteome analysis of the MCF-7 cells revealed that a few but different proteins were differentially expressed under continuous or intermittent RF EMF exposure at SAR of 3.5 W/kg for 24 h or less, implying that the observed effects might have occurred by chance. Overall, the present study does not provide convincing evidence that RF EMF exposure under current experimental conditions can produce distinct effects on gene and protein expression in the MCF-7 cells.

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

PopulationMCF-7 human breast cancer cell line

Sample sizeNot supplied

ExposureRF · 1800 MHz · 3.5 W/kg · up to 24 h (some conditions 24 h or less; continuous or intermittent)

Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

GeneChip analysis found a small number of consistently changed genes after RF EMF exposure up to SAR 3.5 W/kg for 24 h, but these changes were not confirmed by real-time RT-PCR. Proteomics identified a few differentially expressed proteins under continuous or intermittent exposure (SAR 3.5 W/kg, 24 h or less), but the authors suggest these may have occurred by chance and conclude there is no convincing evidence of distinct effects on gene or protein expression under the tested conditions.

Outcomes measured

Gene expression (GeneChip microarray)
Gene expression confirmation (real-time RT-PCR)
Protein expression (proteomics/proteome analysis)

Limitations

Microarray-identified gene changes were not confirmed by RT-PCR
Only a small number of proteins showed differential expression and authors note effects may be due to chance
In vitro model (MCF-7 cell line) may not generalize to in vivo outcomes

View raw extracted JSON

{
  "study_type": "in_vitro",
  "exposure": {
    "band": "RF",
    "source": "mobile phone (GSM 1800 MHz signal simulation)",
    "frequency_mhz": 1800,
    "sar_wkg": 3.5,
    "duration": "up to 24 h (some conditions 24 h or less; continuous or intermittent)"
  },
  "population": "MCF-7 human breast cancer cell line",
  "sample_size": null,
  "outcomes": [
    "Gene expression (GeneChip microarray)",
    "Gene expression confirmation (real-time RT-PCR)",
    "Protein expression (proteomics/proteome analysis)"
  ],
  "main_findings": "GeneChip analysis found a small number of consistently changed genes after RF EMF exposure up to SAR 3.5 W/kg for 24 h, but these changes were not confirmed by real-time RT-PCR. Proteomics identified a few differentially expressed proteins under continuous or intermittent exposure (SAR 3.5 W/kg, 24 h or less), but the authors suggest these may have occurred by chance and conclude there is no convincing evidence of distinct effects on gene or protein expression under the tested conditions.",
  "effect_direction": "no_effect",
  "limitations": [
    "Microarray-identified gene changes were not confirmed by RT-PCR",
    "Only a small number of proteins showed differential expression and authors note effects may be due to chance",
    "In vitro model (MCF-7 cell line) may not generalize to in vivo outcomes"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "GSM",
    "1800 MHz",
    "RF EMF",
    "radiofrequency electromagnetic fields",
    "SAR 3.5 W/kg",
    "MCF-7",
    "gene expression",
    "proteomics",
    "GeneChip",
    "RT-PCR"
  ],
  "suggested_hubs": []
}

AI can be wrong. Always verify against the paper.

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: 10.1002/pmic.200600234
PubMed: 16888767

Read the original paper →

Related papers

← Back to the Research Library