The effect of low-level 60-Hz electromagnetic fields on human lymphoid cells. II. Sister-chromatid exchanges in peripheral lymphocytes and lymphoblastoid cell lines.

{
  "study_type": "other",
  "exposure": {
    "band": "ELF",
    "source": null,
    "frequency_mhz": 0.06,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Human peripheral lymphocytes from 10 normal adults (5 males, 5 females) and lymphoid cell lines from patients with chromosomal instability syndromes",
  "sample_size": 10,
  "outcomes": [
    "Sister-chromatid exchanges (SCE) frequency per chromosome",
    "Cell cycle progression (distribution of first-, second-, and third-division cells)",
    "Chromosome breakage (lymphoblastoid cells only)"
  ],
  "main_findings": "Human peripheral lymphocytes and lymphoid cell lines exposed to low-level 60-Hz sinusoidal EMF (30 microA/cm2 current density; 1 or 2 gauss magnetic field) showed no statistically significant differences versus controls in SCE frequency, cell cycle progression, or chromosome breakage.",
  "effect_direction": "no_effect",
  "limitations": [
    "Exposure duration not reported in abstract",
    "Sample size reported only for normal adult donors; number of cell lines/patients not specified",
    "In vitro/ex vivo cell endpoints; clinical outcomes not assessed"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "60-Hz",
    "ELF",
    "electromagnetic fields",
    "peripheral lymphocytes",
    "lymphoblastoid cell lines",
    "sister-chromatid exchanges",
    "chromosome breakage",
    "cell cycle progression",
    "chromosomal instability syndromes"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.2,
      "reason": "Study involves ELF (60 Hz) exposure relevant to power-frequency environments, though no specific occupational setting is stated."
    }
  ]
}