Effects of extremely low frequency electromagnetic fields on in-vitro cellular cultures HeLa and CHO.

{
  "study_type": "in_vitro",
  "exposure": {
    "band": "ELF",
    "source": "magnetic stimulation system (MSS); repetitive electromagnetic field (rEMF)",
    "frequency_mhz": 5e-05,
    "sar_wkg": null,
    "duration": "Initial exposure: 40 minutes at 50 Hz with 0.4, 1.4, 2.13, 2.49, 2.53 mT (parallel and perpendicular). Subsequent rEMF: 2.49 mT parallel, 40 minutes every 12 hours for 4 days."
  },
  "population": "In-vitro cellular cultures (HeLa and CHO cell lines)",
  "sample_size": null,
  "outcomes": [
    "Cellular proliferation rate"
  ],
  "main_findings": "Cells exposed to 50 Hz magnetic fields showed increased proliferation compared with control cells, with a greater effect reported in exposed (radiated) cell lines. The highest proliferation rate (66.6%) was obtained with repetitive exposure at 2.49 mT applied in parallel direction (40 minutes every 12 hours for 4 days), and the proliferation effect was greater in HeLa cells than in CHO cells.",
  "effect_direction": "benefit",
  "limitations": [
    "Sample size not reported in abstract.",
    "Outcome reporting is limited to proliferation; no other cellular endpoints described in abstract.",
    "Details of controls, randomization/blinding, and statistical analysis are not provided in abstract."
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "extremely low frequency",
    "ELF-EMF",
    "50 Hz",
    "magnetic field",
    "mT",
    "HeLa",
    "CHO",
    "cell culture",
    "in vitro",
    "cell proliferation",
    "repetitive electromagnetic field",
    "rEMF"
  ],
  "suggested_hubs": [
    {
      "slug": "elf-emf",
      "weight": 0.9,
      "reason": "Study examines 50 Hz extremely low frequency magnetic field exposure."
    },
    {
      "slug": "cancer-lab-studies",
      "weight": 0.55,
      "reason": "Includes HeLa (cervical cancer) cell line proliferation under ELF-EMF exposure."
    }
  ]
}