Hematological and toxicogenomic effects of ferromagnetic screening of natural electromagnetic fields.

Bulletin of experimental biology and medicine · 2011 · Harm · Low evidence

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HarmLow evidencePaper 3211

Two-day ferromagnetic screening (reducing the permanent constituent of magnetic field induction by 4–10 μT) was followed by leukopenia on day 14. In male blood leukocytes, aneuploidy and polyploidy increased after 48 h of screening and remained elevated on da…

Study snapshot

PublicationBulletin of experimental biology and medicine · 2011
Study typeanimal
Reported directionHarm
Evidence ratingLow

Abstract

Aftereffects of ferromagnetic screening on the hematological and toxicogenomic parameters in rats were traced over 45 days. Two-day ferromagnetic screening of male and female rats (reducing permanent constituent of magnetic field induction by 4-10 μT) led to leukopenia observed on day 14 of the experiment. Life-time evaluation of the toxicogenomic effects was carried out by rapid method for measurement of blood nucleotide DNA by fluorescent indication. In male blood leukocytes, increased aneuploidy and polyploidy were observed after 48 h of ferromagnetic screening and remained high on days 12 and 28 after screen removal. In contrast to males, leukocyte apoptosis in females was increased only 48 h after the start of ferromagnetic screening.

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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 directionharm
PopulationMale and female rats
Sample sizeNot supplied
Exposure48 h (2-day) screening; follow-up over 45 days
Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Two-day ferromagnetic screening (reducing the permanent constituent of magnetic field induction by 4–10 μT) was followed by leukopenia on day 14. In male blood leukocytes, aneuploidy and polyploidy increased after 48 h of screening and remained elevated on days 12 and 28 after screen removal. In females, leukocyte apoptosis increased only 48 h after the start of screening.

Outcomes measured

  • Hematological parameters (leukopenia)
  • Toxicogenomic parameters (aneuploidy, polyploidy)
  • Leukocyte apoptosis

Limitations

  • Sample size not reported in the abstract.
  • Exposure characterization limited to a reduction in magnetic field induction (4–10 μT); frequency and other field parameters not described.
  • Animal study; generalizability to humans not addressed in the abstract.
  • Outcome measurement methods are only briefly described ("rapid method" with fluorescent indication).
View raw extracted JSON
{
  "study_type": "animal",
  "exposure": {
    "band": null,
    "source": "ferromagnetic screening of natural electromagnetic fields",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "48 h (2-day) screening; follow-up over 45 days"
  },
  "population": "Male and female rats",
  "sample_size": null,
  "outcomes": [
    "Hematological parameters (leukopenia)",
    "Toxicogenomic parameters (aneuploidy, polyploidy)",
    "Leukocyte apoptosis"
  ],
  "main_findings": "Two-day ferromagnetic screening (reducing the permanent constituent of magnetic field induction by 4–10 μT) was followed by leukopenia on day 14. In male blood leukocytes, aneuploidy and polyploidy increased after 48 h of screening and remained elevated on days 12 and 28 after screen removal. In females, leukocyte apoptosis increased only 48 h after the start of screening.",
  "effect_direction": "harm",
  "limitations": [
    "Sample size not reported in the abstract.",
    "Exposure characterization limited to a reduction in magnetic field induction (4–10 μT); frequency and other field parameters not described.",
    "Animal study; generalizability to humans not addressed in the abstract.",
    "Outcome measurement methods are only briefly described (\"rapid method\" with fluorescent indication)."
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "ferromagnetic screening",
    "natural electromagnetic fields",
    "magnetic field induction",
    "rats",
    "leukopenia",
    "aneuploidy",
    "polyploidy",
    "apoptosis",
    "toxicogenomics",
    "hematology"
  ],
  "suggested_hubs": [
    {
      "slug": "animal-studies",
      "weight": 0.9,
      "reason": "Experimental study in male and female rats assessing hematological and genomic endpoints after magnetic field screening."
    }
  ]
}
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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: 10.1007/s10517-011-1254-7
PubMed: 22442798

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