Effects of extremely low frequency electromagnetic field (ELF-EMF) on catalase, cytochrome P450 and nitric oxide synthase in erythro-leukemic cells.

Life sciences · 2015 · Mixed · Low evidence

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MixedLow evidencePaper 4644

ELF-EMF exposure was associated with significant modulation of iNOS, catalase, and cytochrome P450 protein expression in K562 cells in both PMA-stimulated and non-stimulated conditions. The kinetic parameters of CAT, CYP-450, and iNOS were also modulated in r…

Study snapshot

PublicationLife sciences · 2015

Study typein_vitro

Reported directionMixed

Evidence ratingLow

Abstract

AIMS: Extremely low frequency electromagnetic fields (ELF-EMFs) are widely employed in electrical appliances and different equipment such as television sets, mobile phones, computers and microwaves. The molecular mechanism through which ELF-EMFs can influence cellular behavior is still unclear. A hypothesis is that ELF-EMFs could interfere with chemical reactions involving free radical production. Under physiologic conditions, cells maintain redox balance through production of ROS/RNS and antioxidant molecules. The altered balance between ROS generation and elimination plays a critical role in a variety of pathologic conditions including neurodegenerative diseases, aging and cancer. Actually, there is a disagreement as to whether there is a causal or coincidental relationship between ELF-EMF exposure and leukemia development. Increased ROS levels have been observed in several hematopoietic malignancies including acute and chronic myeloid leukemias. MAIN METHODS: In our study, the effect of ELF-EMF exposure on catalase, cytochrome P450 and inducible nitric oxide synthase activity and their expression by Western blot analysis in myelogenous leukemia cell line K562 was evaluated. KEY FINDINGS: A significant modulation of iNOS, CAT and Cyt P450 protein expression was recorded as a result of ELF-EMF exposure in both phorbol 12-myristate 13-acetate (PMA)-stimulated and non-stimulated cell lines. Modulation in kinetic parameters of CAT, CYP-450 and iNOS enzymes in response to ELF-EMF indicates an interaction between the ELF-EMF and the enzymological system. SIGNIFICANCE: These new insights might be important in establishing a mechanistic framework at the molecular level within which the possible effects of ELF-EMF on health can be understood.

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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

PopulationMyelogenous leukemia cell line K562 (erythro-leukemic cells), with PMA-stimulated and non-stimulated conditions

Sample sizeNot supplied

ExposureELF

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Outcomes measured

Catalase (CAT) protein expression (Western blot)
Cytochrome P450 (Cyt P450/CYP-450) protein expression (Western blot)
Inducible nitric oxide synthase (iNOS) protein expression (Western blot)
Catalase (CAT) enzyme activity/kinetic parameters
Cytochrome P450 (CYP-450) enzyme activity/kinetic parameters
Inducible nitric oxide synthase (iNOS) enzyme activity/kinetic parameters

Limitations

Exposure parameters (e.g., field strength, frequency, duration) not reported in the provided abstract/metadata
In vitro cell-line study; health outcomes in humans not assessed
Sample size and replication details not provided

View raw extracted JSON

{
  "study_type": "in_vitro",
  "exposure": {
    "band": "ELF",
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Myelogenous leukemia cell line K562 (erythro-leukemic cells), with PMA-stimulated and non-stimulated conditions",
  "sample_size": null,
  "outcomes": [
    "Catalase (CAT) protein expression (Western blot)",
    "Cytochrome P450 (Cyt P450/CYP-450) protein expression (Western blot)",
    "Inducible nitric oxide synthase (iNOS) protein expression (Western blot)",
    "Catalase (CAT) enzyme activity/kinetic parameters",
    "Cytochrome P450 (CYP-450) enzyme activity/kinetic parameters",
    "Inducible nitric oxide synthase (iNOS) enzyme activity/kinetic parameters"
  ],
  "main_findings": "ELF-EMF exposure was associated with significant modulation of iNOS, catalase, and cytochrome P450 protein expression in K562 cells in both PMA-stimulated and non-stimulated conditions. The kinetic parameters of CAT, CYP-450, and iNOS were also modulated in response to ELF-EMF exposure, suggesting interaction with enzymological systems.",
  "effect_direction": "mixed",
  "limitations": [
    "Exposure parameters (e.g., field strength, frequency, duration) not reported in the provided abstract/metadata",
    "In vitro cell-line study; health outcomes in humans not assessed",
    "Sample size and replication details not provided"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "ELF-EMF",
    "extremely low frequency",
    "K562",
    "erythro-leukemic cells",
    "myelogenous leukemia",
    "oxidative stress",
    "redox balance",
    "ROS",
    "RNS",
    "catalase",
    "cytochrome P450",
    "CYP-450",
    "iNOS",
    "Western blot",
    "PMA"
  ],
  "suggested_hubs": [
    {
      "slug": "mechanisms-oxidative-stress",
      "weight": 0.78,
      "reason": "Assesses modulation of redox-related enzymes (CAT, iNOS, CYP-450) after ELF-EMF exposure in vitro."
    },
    {
      "slug": "elf-emf",
      "weight": 0.7,
      "reason": "Study explicitly investigates extremely low frequency EMF exposure effects."
    }
  ]
}

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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: 10.1016/j.lfs.2014.12.003
PubMed: 25498893

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