Low-Frequency Electromagnetic Field Exposure Enhances Extracellular Trap Formation by Human Neutrophils through the NADPH Pathway

J Innate Immun · 2015 · Harm · Low evidence

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HarmLow evidencePaper 2718

In an ex vivo setup with human neutrophils, low-frequency EMF exposure enhanced neutrophil extracellular trap (NET) formation. The LF-EMF-induced NET formation was dependent on the NADPH oxidase pathway and reactive oxygen species production, while autophagy …

Study snapshot

PublicationJ Innate Immun · 2015

Study typeexposure_assessment

Reported directionHarm

Evidence ratingLow

Abstract

Low-frequency (LF) electromagnetic fields (EMFs) are abundantly present in modern society, and the potential biological consequences of exposure to these fields are under intense debate. Immune cells are suggested as possible target cells, though a clear mechanism is lacking. Considering their crucial role in innate immune activation, we selected an ex vivo exposure set-up with human neutrophils to investigate a possible correlation between neutrophil extracellular trap (NET) formation and LF EMF exposure. Our study shows that formation of NETs is enhanced by LF EMF exposure. Enhanced NET formation leads to increased antimicrobial properties as well as damage to surrounding cells. We found that LF-EMF-induced NET formation is dependent on the NADPH oxidase pathway and production of reactive oxygen species. Additionally, LF EMF exposure does not influence autophagy and PAD4 activity. Our study provides a mechanism by which exposure to LF EMFs could influence the innate immune system.

Machine Enhanced Logic

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 typeexposure_assessment

Effect directionharm

PopulationHuman neutrophils (ex vivo)

Sample sizeNot supplied

ExposureELF

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Outcomes measured

Neutrophil extracellular trap (NET) formation
Antimicrobial properties (associated with enhanced NET formation)
Damage to surrounding cells (associated with enhanced NET formation)
NADPH oxidase pathway involvement
Reactive oxygen species production
Autophagy
PAD4 activity

Limitations

Frequency, field strength, and exposure duration are not reported in the abstract.
Sample size is not provided in the abstract.
Ex vivo design may limit direct inference to in vivo human health outcomes.

View raw extracted JSON

{
  "study_type": "exposure_assessment",
  "exposure": {
    "band": "ELF",
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "Human neutrophils (ex vivo)",
  "sample_size": null,
  "outcomes": [
    "Neutrophil extracellular trap (NET) formation",
    "Antimicrobial properties (associated with enhanced NET formation)",
    "Damage to surrounding cells (associated with enhanced NET formation)",
    "NADPH oxidase pathway involvement",
    "Reactive oxygen species production",
    "Autophagy",
    "PAD4 activity"
  ],
  "main_findings": "In an ex vivo setup with human neutrophils, low-frequency EMF exposure enhanced neutrophil extracellular trap (NET) formation. The LF-EMF-induced NET formation was dependent on the NADPH oxidase pathway and reactive oxygen species production, while autophagy and PAD4 activity were not influenced.",
  "effect_direction": "harm",
  "limitations": [
    "Frequency, field strength, and exposure duration are not reported in the abstract.",
    "Sample size is not provided in the abstract.",
    "Ex vivo design may limit direct inference to in vivo human health outcomes."
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "low-frequency electromagnetic fields",
    "LF EMF",
    "ELF EMF",
    "neutrophils",
    "neutrophil extracellular traps",
    "NET formation",
    "innate immunity",
    "NADPH oxidase",
    "reactive oxygen species",
    "autophagy",
    "PAD4"
  ],
  "suggested_hubs": [
    {
      "slug": "who-icnirp",
      "weight": 0.2,
      "reason": "Addresses biological effects of low-frequency EMF exposure, a topic relevant to EMF health risk evaluation frameworks."
    }
  ]
}

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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: 10.1159/000380764
PubMed: 25871408

Read the original paper →

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