Quantum mechanical model for the anticarcinogenic effect of extremely-low-frequency electromagnetic fields on early chemical hepatocarcinogenesis.

Physical review. E · 2017 · Benefit · Very low evidence

← Research stream

BenefitVery low evidencePaper 4929

Study snapshot

PublicationPhysical review. E · 2017

Study typeother

Reported directionBenefit

Evidence ratingVery low

Abstract

Using the conventional Haberkorn approach, it is evaluated the recombination of the radical pair (RP) singlet spin state to study theoretically the cytoprotective effect of an extremely-low-frequency electromagnetic field (ELF-EMF) on early stages of hepatic cancer chemically induced in rats. The proposal is that ELF-EMF modulates the interconversion rate of singlet and triplet spin states of the RP populations modifying the products from the metabolization of carcinogens. Previously, we found that the daily treatment with ELF-EMF 120 Hz inhibited the number and area of preneoplastic lesions in chemical carcinogenesis. The singlet spin population is evaluated diagonalizing the spin density matrix through the Lanczos method in a radical pair mechanism (RPM). Using four values of the interchange energy, we have studied the variations over the singlet population. The low magnetic field effect as a test of the influence over the enzymatic chemical reaction is evaluated calculating the quantum yield. Through a bootstrap technique the range is found for the singlet decay rate for the process. Applying the quantum measurements concept, we addressed the impact toward hepatic cells. The result contributes to improving our understanding of the chemical carcinogenesis process affected by charged particles that damage the DNA.

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 typeother

Effect directionbenefit

PopulationRats (chemical hepatocarcinogenesis model; early stages)

Sample sizeNot supplied

ExposureELF · 0.00012 MHz · daily treatment (duration not specified)

Evidence strengthVery lowConfidence: 66% · Peer reviewed: yes

Main findings

A quantum mechanical radical pair mechanism model is used to evaluate how an ELF-EMF (120 Hz) could modulate singlet–triplet interconversion and thereby alter reaction products from carcinogen metabolization. The abstract states that prior work found daily 120 Hz ELF-EMF treatment inhibited the number and area of preneoplastic lesions in chemically induced hepatic carcinogenesis in rats.

Outcomes measured

Radical pair (RP) singlet/triplet interconversion and recombination (theoretical)
Singlet spin population
Quantum yield (low magnetic field effect)
Singlet decay rate range (bootstrap)
Preneoplastic lesion number and area (referenced prior finding)

Limitations

The work described is theoretical/model-based; experimental details are not provided in the abstract.
Exposure parameters beyond frequency (e.g., field strength) are not stated.
Sample size and quantitative effect estimates are not reported.
The inhibitory effect on preneoplastic lesions is described as a previous finding rather than results presented here.

View raw extracted JSON

{
  "study_type": "other",
  "exposure": {
    "band": "ELF",
    "source": null,
    "frequency_mhz": 0.00012,
    "sar_wkg": null,
    "duration": "daily treatment (duration not specified)"
  },
  "population": "Rats (chemical hepatocarcinogenesis model; early stages)",
  "sample_size": null,
  "outcomes": [
    "Radical pair (RP) singlet/triplet interconversion and recombination (theoretical)",
    "Singlet spin population",
    "Quantum yield (low magnetic field effect)",
    "Singlet decay rate range (bootstrap)",
    "Preneoplastic lesion number and area (referenced prior finding)"
  ],
  "main_findings": "A quantum mechanical radical pair mechanism model is used to evaluate how an ELF-EMF (120 Hz) could modulate singlet–triplet interconversion and thereby alter reaction products from carcinogen metabolization. The abstract states that prior work found daily 120 Hz ELF-EMF treatment inhibited the number and area of preneoplastic lesions in chemically induced hepatic carcinogenesis in rats.",
  "effect_direction": "benefit",
  "limitations": [
    "The work described is theoretical/model-based; experimental details are not provided in the abstract.",
    "Exposure parameters beyond frequency (e.g., field strength) are not stated.",
    "Sample size and quantitative effect estimates are not reported.",
    "The inhibitory effect on preneoplastic lesions is described as a previous finding rather than results presented here."
  ],
  "evidence_strength": "very_low",
  "confidence": 0.66,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "extremely-low-frequency electromagnetic field",
    "ELF-EMF",
    "120 Hz",
    "radical pair mechanism",
    "Haberkorn approach",
    "spin density matrix",
    "Lanczos method",
    "quantum yield",
    "hepatocarcinogenesis",
    "preneoplastic lesions",
    "rats"
  ],
  "suggested_hubs": [
    {
      "slug": "elf-emf",
      "weight": 0.86,
      "reason": "Study focuses on extremely-low-frequency EMF (120 Hz) and biological/carcinogenesis-related mechanisms."
    },
    {
      "slug": "animal-studies",
      "weight": 0.62,
      "reason": "Context is chemically induced hepatic cancer in rats (though the present paper is primarily a theoretical model)."
    }
  ]
}

AI can be wrong. Always verify against the paper.

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: 10.1103/physreve.95.022416
PubMed: 28297882

Read the original paper →

Related papers

← Back to the Research Library