Differentiation of K562 cells under ELF-EMF applied at different time courses.

Electromagnetic biology and medicine · 2010 · Mixed · Low evidence

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MixedLow evidencePaper 4363

Single 1-hour exposure to ELF-EMF decreased differentiation of K562 cells, whereas daily 1-hour exposure for four days increased differentiation. ELF-EMF increased ROS levels in cells without hemin but did not affect ROS in hemin-treated cells, suggesting ROS…

Study snapshot

PublicationElectromagnetic biology and medicine · 2010

Study typein_vitro

Reported directionMixed

Evidence ratingLow

Abstract

The time-course of ELF-EMF application to biological systems is thought to be an important parameter determining the physiological outcome. This study investigated the effect of ELF-EMF on the differentiation of K562 cells at different time courses. ELF-EMF (50 Hz, 5 mT, 1 h) was applied at two different time-courses; first at the onset of hemin induction for 1 h, and second, daily 1 h for four days. While single exposure to ELF-EMF resulted in a decrease in differentiation, ELF-EMF applied everyday for 1 h caused an increase in differentiation. The effect of co-stressors, magnesium, and heat-shock was also determined and similar results were obtained. ELF-EMF increased ROS levels in K562 cells not treated with hemin, however did not change ROS levels of hemin treated cells indicating that ROS was not the cause. Overall, these results imply that the time-course of application is an important parameter determining the physiological response of cells to ELF-EMF.

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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 typein_vitro

Effect directionmixed

PopulationK562 cells (human leukemia cell line)

Sample sizeNot supplied

ExposureELF · 0.05 MHz · 1 hour single or daily 1 hour for four days

Evidence strengthLowConfidence: 40% · Peer reviewed: yes

Main findings

Outcomes measured

cell differentiation
ROS levels

Limitations

In vitro study only
Sample size not reported
Only one cell line studied
No direct mechanistic conclusions

View raw extracted JSON

{
  "study_type": "in_vitro",
  "exposure": {
    "band": "ELF",
    "source": null,
    "frequency_mhz": 0.05,
    "sar_wkg": null,
    "duration": "1 hour single or daily 1 hour for four days"
  },
  "population": "K562 cells (human leukemia cell line)",
  "sample_size": null,
  "outcomes": [
    "cell differentiation",
    "ROS levels"
  ],
  "main_findings": "Single 1-hour exposure to ELF-EMF decreased differentiation of K562 cells, whereas daily 1-hour exposure for four days increased differentiation. ELF-EMF increased ROS levels in cells without hemin but did not affect ROS in hemin-treated cells, suggesting ROS was not the cause of differentiation changes.",
  "effect_direction": "mixed",
  "limitations": [
    "In vitro study only",
    "Sample size not reported",
    "Only one cell line studied",
    "No direct mechanistic conclusions"
  ],
  "evidence_strength": "low",
  "confidence": 0.4,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "ELF-EMF",
    "K562 cells",
    "cell differentiation",
    "ROS",
    "time-course exposure"
  ],
  "suggested_hubs": []
}

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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: 10.3109/15368378.2010.502451
PubMed: 20707646

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