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Embryological changes induced by weak, extremely low frequency electromagnetic fields

J M Delgado, J Leal, J L Monteagudo

    Journal of Anatomy
    |May 1, 1982
    PubMed
    Summary
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    Extremely low frequency magnetic fields (ELMF) can disrupt chicken embryo development, with specific frequencies and intensities causing significant embryogenesis inhibition. This research highlights ELMF

    Area of Science:

    • Developmental Biology
    • Electromagnetism
    • Teratology

    Background:

    • Extremely low frequency magnetic fields (ELMF) are ubiquitous.
    • Previous studies have investigated the biological effects of ELMF with varying results.
    • The impact of specific ELMF parameters on early embryogenesis requires further elucidation.

    Purpose of the Study:

    • To investigate the effects of different frequencies and intensities of ELMF on chicken embryo development.
    • To identify specific ELMF parameters that significantly inhibit embryogenesis.
    • To explore the potential mechanisms underlying ELMF-induced embryological disturbances.

    Main Methods:

    • Fertilized chicken eggs were incubated for 48 hours under controlled exposure to ELMF (10 Hz, 100 Hz, 1000 Hz at 0.12, 1.2, 12 micro T).

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  • Gross morphological and histological analyses were performed on exposed embryos.
  • Developmental parameters and the presence of glycosaminoglycans were assessed.

    • Main Results:

    • ELMF at 100 Hz and 1.2 micro T demonstrated the most potent inhibitory effect, arresting development at the three primitive layer stage.
    • A 'window effect' was observed, with 100 Hz/1.2 micro T exposure causing more severe inhibition than lower or higher intensities/frequencies.
    • Specific organ development showed differential sensitivity; somites were unaffected at 10 Hz, while blood vessel formation was blocked at 1000 Hz/12 micro T.
    • Observed embryological disturbances occurred at lower intensities than previously reported.
    • ELMF-induced alterations may be linked to disruptions in glycosaminoglycans.

    Conclusions:

    • Specific ELMF parameters can significantly inhibit early chicken embryogenesis.
    • The findings suggest a frequency and intensity-dependent 'window effect' of ELMF on development.
    • ELMF exposure may interfere with essential cellular processes, potentially via glycosaminoglycan disruption.
    • Low-intensity ELMF could serve as a valuable tool for studying embryogenetic mechanisms and other biological systems.