[Effect of Low-Intensity 900 MHz Frequency Electromagnetic Radiation on Rat Brain Enzyme Activities Linked to Energy Metabolism].

Radiatsionnaia biologiia, radioecologiia · 2015 · Harm · Low evidence

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HarmLow evidencePaper 2950

Study snapshot

PublicationRadiatsionnaia biologiia, radioecologiia · 2015

Study typeanimal

Reported directionHarm

Evidence ratingLow

Abstract

The research deals with the effect of low-intensity 900 MHz frequency electromagnetic radiation (EMR), power density 25 μW/cm2, on the following rat brain and blood serum enzyme activities: creatine kinase (CK), playing a central role in the process of storing and distributing the cell energy, as well as alanine aminotransferase (ALT) and aspartate aminotransferase (AST) that play a key role in providing the conjunction of carbohydrate and amino acid metabolism. The comparative analysis of the changes in the enzyme activity studied at different times following the two-hour single, as well as fractional, radiation equivalent of the total time showed that the most radiosensitive enzyme is the brain creatine kinase, which may then be recommended as a marker of the radio frequency radiation impact. According to the analysis of the changing dynamics of the CK, ALT and AST activity level, with time these changes acquire the adaptive character and are directed to compensate the damaged cell energy metabolism.

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 typeanimal

Effect directionharm

PopulationRats

Sample sizeNot supplied

ExposureRF · 900 MHz · Two-hour single exposure; also fractional exposure equivalent to the total time

Evidence strengthLowConfidence: 72% · Peer reviewed: yes

Main findings

Low-intensity 900 MHz EMR (power density 25 μW/cm2) was associated with time-dependent changes in rat brain and blood serum enzyme activities (CK, ALT, AST) after either a single 2-hour exposure or a fractionated exposure of equivalent total duration. Brain creatine kinase was reported as the most radiosensitive enzyme, and the authors suggest CK could serve as a marker of RF radiation impact; over time, the enzyme activity changes were described as becoming adaptive and compensatory for damaged cellular energy metabolism.

Outcomes measured

Brain creatine kinase (CK) activity
Blood serum alanine aminotransferase (ALT) activity
Blood serum aspartate aminotransferase (AST) activity

Limitations

Sample size not reported in abstract
No SAR reported (only power density given)
Exposure source and experimental setup details not provided in abstract
Quantitative results/statistical significance not provided in abstract
Timing of post-exposure measurements not specified in abstract

View raw extracted JSON

{
  "study_type": "animal",
  "exposure": {
    "band": "RF",
    "source": null,
    "frequency_mhz": 900,
    "sar_wkg": null,
    "duration": "Two-hour single exposure; also fractional exposure equivalent to the total time"
  },
  "population": "Rats",
  "sample_size": null,
  "outcomes": [
    "Brain creatine kinase (CK) activity",
    "Blood serum alanine aminotransferase (ALT) activity",
    "Blood serum aspartate aminotransferase (AST) activity"
  ],
  "main_findings": "Low-intensity 900 MHz EMR (power density 25 μW/cm2) was associated with time-dependent changes in rat brain and blood serum enzyme activities (CK, ALT, AST) after either a single 2-hour exposure or a fractionated exposure of equivalent total duration. Brain creatine kinase was reported as the most radiosensitive enzyme, and the authors suggest CK could serve as a marker of RF radiation impact; over time, the enzyme activity changes were described as becoming adaptive and compensatory for damaged cellular energy metabolism.",
  "effect_direction": "harm",
  "limitations": [
    "Sample size not reported in abstract",
    "No SAR reported (only power density given)",
    "Exposure source and experimental setup details not provided in abstract",
    "Quantitative results/statistical significance not provided in abstract",
    "Timing of post-exposure measurements not specified in abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.72,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "900 MHz",
    "radiofrequency",
    "low-intensity",
    "power density 25 μW/cm2",
    "rat",
    "brain",
    "blood serum",
    "creatine kinase",
    "alanine aminotransferase",
    "aspartate aminotransferase",
    "energy metabolism",
    "enzyme activity"
  ],
  "suggested_hubs": [
    {
      "slug": "rf-biology",
      "weight": 0.78,
      "reason": "Animal study assessing biological effects of 900 MHz RF exposure on enzyme activities linked to energy metabolism."
    }
  ]
}

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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: 26964348

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