Experimental study of the effects of radiofrequency electromagnetic fields on animals with soft tissue wounds.

The Science of the total environment · 1996 · Mixed · Low evidence

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MixedLow evidencePaper 5413

Study snapshot

PublicationThe Science of the total environment · 1996

Study typeanimal

Reported directionMixed

Evidence ratingLow

Abstract

The effect of radio frequency electromagnetic fields (RF EMF) was studied on Wistar rats with excised full-thickness dermal wounds in the interscapular region. The wounded regions of experimental animals were subjected to EMF for 30 min daily during the first 5 days after wound infliction. Control animals received no treatment. We used RF EMF with (1) frequency 53.53 GHz without modulation; (2) frequency 42.19 GHz without modulation; (3) frequency 42.19 GHz, but with a frequency modulation band 200-MHz wide. On the 7th day the animals were terminated and the granulation-fibrous tissue (GFT) developed in the wounds was subjected to complex quantitative biochemical analysis. RF EMF without frequency modulation decreased the amounts of glycoprotein macromolecules, diminishing the inflammatory exudation. In striking contrast, under the influence of RF EMF with frequency modulation, hexoses and especially sialic acid concentrations were significantly elevated (P < 0.001). This indicated intensification of exudative phenomena. As a consequence of inflammation inhibition in the treatment without frequency modulation, the total collagen accumulation was lowered. However, when frequency was modulated, the inflammatory phenomena were intensified, and pronounced accumulation of collagenous proteins was noted. Thus, our experiments confirm the effects of non-thermal EMF on the reparative-proliferative processes of animals with soft tissue wounds.

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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 typeanimal

Effect directionmixed

PopulationWistar rats with excised full-thickness dermal wounds (interscapular region)

Sample sizeNot supplied

ExposuremmWave · 53530 MHz · 30 min daily for first 5 days after wound infliction

Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

Rats exposed to RF EMF without frequency modulation (53.53 GHz or 42.19 GHz) showed decreased glycoprotein macromolecules and reduced inflammatory exudation, with lowered total collagen accumulation. In contrast, 42.19 GHz exposure with 200-MHz-wide frequency modulation significantly increased hexoses and especially sialic acid (P < 0.001), indicating intensified exudative phenomena and pronounced accumulation of collagenous proteins. The authors conclude these are non-thermal EMF effects on reparative-proliferative processes in soft tissue wounds.

Outcomes measured

Granulation-fibrous tissue (GFT) biochemical composition
Glycoprotein macromolecules
Inflammatory exudation markers (hexoses, sialic acid)
Collagen accumulation / collagenous proteins

Limitations

Sample size not reported in abstract
Randomization/blinding not described
Exposure intensity/dosimetry (e.g., SAR, power density) not reported
Only short-term endpoint assessed (termination on day 7)
Biochemical outcomes reported; clinical wound-healing outcomes not described

View raw extracted JSON

{
  "study_type": "animal",
  "exposure": {
    "band": "mmWave",
    "source": null,
    "frequency_mhz": 53530,
    "sar_wkg": null,
    "duration": "30 min daily for first 5 days after wound infliction"
  },
  "population": "Wistar rats with excised full-thickness dermal wounds (interscapular region)",
  "sample_size": null,
  "outcomes": [
    "Granulation-fibrous tissue (GFT) biochemical composition",
    "Glycoprotein macromolecules",
    "Inflammatory exudation markers (hexoses, sialic acid)",
    "Collagen accumulation / collagenous proteins"
  ],
  "main_findings": "Rats exposed to RF EMF without frequency modulation (53.53 GHz or 42.19 GHz) showed decreased glycoprotein macromolecules and reduced inflammatory exudation, with lowered total collagen accumulation. In contrast, 42.19 GHz exposure with 200-MHz-wide frequency modulation significantly increased hexoses and especially sialic acid (P < 0.001), indicating intensified exudative phenomena and pronounced accumulation of collagenous proteins. The authors conclude these are non-thermal EMF effects on reparative-proliferative processes in soft tissue wounds.",
  "effect_direction": "mixed",
  "limitations": [
    "Sample size not reported in abstract",
    "Randomization/blinding not described",
    "Exposure intensity/dosimetry (e.g., SAR, power density) not reported",
    "Only short-term endpoint assessed (termination on day 7)",
    "Biochemical outcomes reported; clinical wound-healing outcomes not described"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "radiofrequency electromagnetic fields",
    "mmWave",
    "53.53 GHz",
    "42.19 GHz",
    "frequency modulation",
    "Wistar rats",
    "dermal wounds",
    "granulation-fibrous tissue",
    "inflammation",
    "collagen"
  ],
  "suggested_hubs": []
}

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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: 10.1016/0048-9697(95)04917-7
PubMed: 8717318

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