Magnetocarcinogenesis: is there a mechanism for carcinogenic effects of weak magnetic fields?

2018 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 2090

Study snapshot

Publicationmanual · 2018

Study typereview

Reported directionUnclear

Evidence ratingInsufficient

Abstract

Magnetocarcinogenesis: is there a mechanism for carcinogenic effects of weak magnetic fields? Juutilainen J, Herrala M, Luukkonen J, Naarala J, Hore PJ. Magnetocarcinogenesis: is there a mechanism for carcinogenic effects of weak magnetic fields? Proceedings of the Royal Society B: Biological Sciences. May 23, 2018. Abstract Extremely low-frequency (ELF) magnetic fields have been classified as possibly carcinogenic, mainly based on rather consistent epidemiological findings suggesting a link between childhood leukaemia and 50-60 Hz magnetic fields from power lines. However, causality is not the only possible explanation for the epidemiological associations, as animal and in vitro experiments have provided only limited support for carcinogenic effects of ELF magnetic fields. Importantly, there is no generally accepted biophysical mechanism that could explain such effects. In this review, we discuss the possibility that carcinogenic effects are based on the radical pair mechanism (RPM), which seems to be involved in magnetoreception in birds and certain other animals, allowing navigation in the geomagnetic field. We review the current understanding of the RPM in magnetoreception, and discuss cryptochromes as the putative magnetosensitive molecules and their possible links to cancer-relevant biological processes. We then propose a hypothesis for explaining the link between ELF fields and childhood leukaemia, discuss the strengths and weaknesses of the current evidence, and make proposals for further research. rspb.royalsocietypublishing.org

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 typereview

Effect directionunclear

Populationchildren (childhood leukaemia context in epidemiological findings)

Sample sizeNot supplied

ExposureELF

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

The review notes that ELF (50–60 Hz) magnetic fields are classified as possibly carcinogenic largely due to epidemiological associations with childhood leukaemia, while animal and in vitro studies provide only limited support and no generally accepted biophysical mechanism exists. It discusses the radical pair mechanism (RPM), including cryptochromes, as a possible mechanistic basis and proposes a hypothesis linking ELF fields to childhood leukaemia, outlining strengths/weaknesses and research needs.

Outcomes measured

cancer
childhood leukaemia

Limitations

Epidemiological associations may have non-causal explanations
Animal and in vitro experiments have provided only limited support for carcinogenic effects
No generally accepted biophysical mechanism currently explains the reported associations

View raw extracted JSON

{
  "study_type": "review",
  "exposure": {
    "band": "ELF",
    "source": "power lines",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "children (childhood leukaemia context in epidemiological findings)",
  "sample_size": null,
  "outcomes": [
    "cancer",
    "childhood leukaemia"
  ],
  "main_findings": "The review notes that ELF (50–60 Hz) magnetic fields are classified as possibly carcinogenic largely due to epidemiological associations with childhood leukaemia, while animal and in vitro studies provide only limited support and no generally accepted biophysical mechanism exists. It discusses the radical pair mechanism (RPM), including cryptochromes, as a possible mechanistic basis and proposes a hypothesis linking ELF fields to childhood leukaemia, outlining strengths/weaknesses and research needs.",
  "effect_direction": "unclear",
  "limitations": [
    "Epidemiological associations may have non-causal explanations",
    "Animal and in vitro experiments have provided only limited support for carcinogenic effects",
    "No generally accepted biophysical mechanism currently explains the reported associations"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "extremely low-frequency",
    "ELF",
    "magnetic fields",
    "power lines",
    "50-60 Hz",
    "childhood leukaemia",
    "carcinogenesis",
    "radical pair mechanism",
    "RPM",
    "cryptochromes",
    "magnetoreception"
  ],
  "suggested_hubs": [
    {
      "slug": "who-icnirp",
      "weight": 0.55,
      "reason": "Discusses ELF magnetic fields classified as possibly carcinogenic and evaluates evidence/mechanisms relevant to health risk assessment."
    },
    {
      "slug": "occupational-exposure",
      "weight": 0,
      "reason": null
    }
  ]
}

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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: Not supplied
PubMed: Not supplied

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