Inability of 50 Hz magnetic fields to regulate PKC- and Ca(2+)-dependent gene expression in Jurkat cells.

{
  "study_type": "in_vitro",
  "exposure": {
    "band": "ELF",
    "source": null,
    "frequency_mhz": 0.05,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Jurkat T cell line (Jurkat cells)",
  "sample_size": null,
  "outcomes": [
    "Luciferase reporter activity from Ca(2+)-dependent enhancer/promoter constructs (gene expression reporters)"
  ],
  "main_findings": "In transiently transfected Jurkat cells carrying calcium-ion dependent luciferase reporter constructs, exposure to a sinusoidal 50 Hz magnetic field showed no indication of influencing reporter activity, either alone or combined with ionomycin, phorbol ester, or anti-CD3 cross-linking.",
  "effect_direction": "no_effect",
  "limitations": [
    "Exposure parameters beyond frequency (e.g., field strength, duration) not reported in the abstract",
    "Sample size and replication details not reported in the abstract",
    "Only reporter constructs in Jurkat cells were assessed; generalizability to other cell types/endpoints is not addressed in the abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "extremely low frequency",
    "ELF",
    "50 Hz",
    "magnetic field",
    "Jurkat cells",
    "T cell line",
    "calcium-dependent gene expression",
    "PKC",
    "Ca2+",
    "luciferase reporter",
    "transient transfection",
    "ionomycin",
    "phorbol ester",
    "anti-CD3",
    "p56(lck)"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.2,
      "reason": "Study involves 50 Hz ELF magnetic fields, which are commonly discussed in occupational ELF exposure contexts, though no specific occupational setting is described."
    }
  ]
}