Changes in the Honeybee Antioxidant System after 12 h of Exposure to Electromagnetic Field Frequency of 50 Hz and Variable Intensity

PAPER manual 2020 Animal study Effect: harm Evidence: Low

Read original paper → DOI: 10.3390/insects11100713 Evidence Lab

Abstract

Changes in the Honeybee Antioxidant System after 12 h of Exposure to Electromagnetic Field Frequency of 50 Hz and Variable Intensity Paweł Migdał, Agnieszka Murawska, Aneta Strachecka, Paweł Bieńkowski, Adam Roman. Changes in the Honeybee Antioxidant System after 12 h of Exposure to Electromagnetic Field Frequency of 50 Hz and Variable Intensity. Insects. 2020 Oct 18;11(10):E713. doi: 10.3390/insects11100713. Abstract In recent years, on a global scale, more and more reports of a phenomenon called CCD (Colony Collapse Disorder) have been reported. In addition to pesticides, diseases, and other environmental stressors, electromagnetic fields are also mentioned as one of the possible causes of CCD. One of the body's first lines of defense against harmful factors is the antioxidant system. We hypothesized that electromagnetic field upregulate the activity of SOD (superoxide dismutase), CAT (catalases), and changed FRAP (total antioxidant potential) in honeybee hemolymph. In our research, 12 h bee's exposure to E-field was analyzed to determine changes in the antioxidant system. The frequency of 50 Hz and various intensities were used: 5.0 kV/m, 11.5 kV/m, 23.0 kV/m, and 34.5 kV/m. Superoxide dismutase was characterized by four times higher activity in the study groups as compared to the control group. Catalase activity in all groups was characterized by statistically significantly different activity between the groups. The highest activity was recorded in the 34.5 kV/m group. The lowest activity was recorded in the 11.5 kV/m group. A relationship was found between different E-field intensities and changes in the antioxidant system. Open access paper: mdpi.com

AI evidence extraction

At a glance

Study type

Animal study

Effect direction

harm

Population

Honeybees

Sample size

—

Exposure

ELF · 0.05 MHz · 12 h

Evidence strength

Low

Confidence: 74% · Peer-reviewed: yes

Main findings

After 12 h exposure to a 50 Hz electric field at 5.0, 11.5, 23.0, or 34.5 kV/m, SOD activity was reported as four times higher in exposed groups compared with controls. Catalase activity differed statistically between exposure-intensity groups, with the highest activity at 34.5 kV/m and the lowest at 11.5 kV/m; the authors report a relationship between field intensity and antioxidant-system changes.

Outcomes measured

Hemolymph superoxide dismutase (SOD) activity
Hemolymph catalase (CAT) activity
FRAP (total antioxidant potential)

Limitations

Sample size not reported in the abstract
Details of exposure setup and control conditions not described in the abstract
FRAP results not explicitly reported in the abstract
Short exposure duration (12 h) only

View raw extracted JSON

{
    "study_type": "animal",
    "exposure": {
        "band": "ELF",
        "source": null,
        "frequency_mhz": 0.05000000000000000277555756156289135105907917022705078125,
        "sar_wkg": null,
        "duration": "12 h"
    },
    "population": "Honeybees",
    "sample_size": null,
    "outcomes": [
        "Hemolymph superoxide dismutase (SOD) activity",
        "Hemolymph catalase (CAT) activity",
        "FRAP (total antioxidant potential)"
    ],
    "main_findings": "After 12 h exposure to a 50 Hz electric field at 5.0, 11.5, 23.0, or 34.5 kV/m, SOD activity was reported as four times higher in exposed groups compared with controls. Catalase activity differed statistically between exposure-intensity groups, with the highest activity at 34.5 kV/m and the lowest at 11.5 kV/m; the authors report a relationship between field intensity and antioxidant-system changes.",
    "effect_direction": "harm",
    "limitations": [
        "Sample size not reported in the abstract",
        "Details of exposure setup and control conditions not described in the abstract",
        "FRAP results not explicitly reported in the abstract",
        "Short exposure duration (12 h) only"
    ],
    "evidence_strength": "low",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "honeybee",
        "Apis",
        "antioxidant system",
        "superoxide dismutase",
        "catalase",
        "FRAP",
        "electric field",
        "ELF",
        "50 Hz",
        "kV/m",
        "oxidative stress",
        "CCD"
    ],
    "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract/metadata and may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.

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