Effects of extremely-low-frequency electromagnetic fields on ion transport in several mammalian cells.

{
  "study_type": "in_vitro",
  "exposure": {
    "band": "ELF",
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Mammalian cells in vitro: red blood cells, thymocytes, Ehrlich ascites tumor cells, HL60 and U937 human leukemia cells",
  "sample_size": null,
  "outcomes": [
    "Ion transport/uptake (Ca2+, Na+, K+, H+)",
    "Uptake of radioactive tracers (including 42K)",
    "Cytosolic Ca2+ concentration ([Ca2+]i)",
    "Intracellular pH (pHi)",
    "Transmembrane potential (TMP)"
  ],
  "main_findings": "Sinusoidal EMF exposure at 50 Hz and 100–2000 microT (rms) showed no significant effects on tracer uptake, [Ca2+]i, pHi, or TMP in the tested cell types. EMF exposure at estimated cyclotron magnetic resonance frequencies (20–1200 microT rms) also showed no significant effects, except a 12–32% increase in 42K uptake within a window at 14.5–15.5 Hz and 100–200 microT (rms) observed in U937 and Ehrlich cells but not in other cell types.",
  "effect_direction": "mixed",
  "limitations": [
    "Sample size not reported in abstract",
    "Exposure duration not reported in abstract",
    "Details of experimental conditions and statistical methods not provided in abstract",
    "Observed effect limited to a specific frequency/intensity window and specific cell types"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "extremely-low-frequency",
    "ELF",
    "sinusoidal electromagnetic fields",
    "50 Hz",
    "microtesla",
    "cyclotron magnetic resonance",
    "ion transport",
    "calcium",
    "sodium",
    "potassium",
    "protons",
    "42K uptake",
    "intracellular pH",
    "transmembrane potential",
    "U937",
    "HL60",
    "Ehrlich ascites tumor cells",
    "thymocytes",
    "red blood cells"
  ],
  "suggested_hubs": []
}