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Effect of extremely low frequency electromagnetic field on brain histopathology of Caspian Sea Cyprinus carpio.

Electromagnetic biology and medicine · 2017 · Harm · Low evidence

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HarmLow evidencePaper 4848

In Cyprinus carpio, exposure to artificial 50 Hz ELF-EMF produced severe histopathological changes in the brain at magnetic field intensities ≥3 mT, reported to lead to brain necrosis. Field intensity and exposure duration were described as key parameters in …

Study snapshot

PublicationElectromagnetic biology and medicine · 2017
Study typeanimal
Reported directionHarm
Evidence ratingLow

Abstract

There is limited research on the effect of electromagnetic field on aquatic organisms, especially freshwater fish species. This study was conducted to evaluate the effect of extremely low frequency electromagnetic field (ELF-EMF) (50 Hz) exposure on brain histopathology of Cyprinus carpio, one of the important species of Caspian Sea with significant economic value. A total of 200 healthy fish were used in this study. They were classified randomly in two groups: sham-exposed group and experimental group, which were exposed to five different magnetic field intensities (0.1, 1, 3, 5, and 7 mT) at two different exposure times (0.5 and 1 h). Histologic results indicate that exposure of C. carpio to artificial ELF-EMF caused severe histopathological changes in the brain at field intensities ≥3 mT leading to brain necrosis. Field intensity and duration of exposure were key parameters in induction of lesion in the brain. Further studies are needed to elucidate exact mechanism of EMF exposure on the brain.

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 typeanimal
Effect directionharm
PopulationCyprinus carpio (Caspian Sea carp)
Sample size200
ExposureELF · 5e-05 MHz · 0.5 and 1 h
Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

In Cyprinus carpio, exposure to artificial 50 Hz ELF-EMF produced severe histopathological changes in the brain at magnetic field intensities ≥3 mT, reported to lead to brain necrosis. Field intensity and exposure duration were described as key parameters in lesion induction.

Outcomes measured

  • Brain histopathology
  • Brain lesions
  • Brain necrosis

Limitations

  • Mechanism not elucidated (authors note further studies needed)
  • Exposure source/setup details not provided in abstract beyond frequency, intensity, and duration
  • Outcome limited to histopathology (no functional/behavioral endpoints described)
View raw extracted JSON
{
  "study_type": "animal",
  "exposure": {
    "band": "ELF",
    "source": null,
    "frequency_mhz": 5e-05,
    "sar_wkg": null,
    "duration": "0.5 and 1 h"
  },
  "population": "Cyprinus carpio (Caspian Sea carp)",
  "sample_size": 200,
  "outcomes": [
    "Brain histopathology",
    "Brain lesions",
    "Brain necrosis"
  ],
  "main_findings": "In Cyprinus carpio, exposure to artificial 50 Hz ELF-EMF produced severe histopathological changes in the brain at magnetic field intensities ≥3 mT, reported to lead to brain necrosis. Field intensity and exposure duration were described as key parameters in lesion induction.",
  "effect_direction": "harm",
  "limitations": [
    "Mechanism not elucidated (authors note further studies needed)",
    "Exposure source/setup details not provided in abstract beyond frequency, intensity, and duration",
    "Outcome limited to histopathology (no functional/behavioral endpoints described)"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "extremely low frequency",
    "ELF-EMF",
    "50 Hz",
    "magnetic field intensity",
    "mT",
    "fish",
    "Cyprinus carpio",
    "brain",
    "histopathology",
    "necrosis"
  ],
  "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: 10.3109/15368378.2016.1144064
PubMed: 27362452

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