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Intercellular communication in insect development is hormonally controlled.

S Caveney

    Science (New York, N.Y.)
    |January 13, 1978
    PubMed
    Summary
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    Insect metamorphosis involves changes in cellular communication. Beta-ecdysone initially increases electrical coupling, while cyclic AMP and calcium ions reverse these effects, suggesting a signaling pathway.

    Area of Science:

    • Developmental biology
    • Cellular biology
    • Insect physiology

    Background:

    • Cellular coupling is crucial for tissue development and undergoes dynamic changes during insect metamorphosis.
    • The insect epidermis exhibits characteristic alterations in cellular communication during this transformative period.

    Purpose of the Study:

    • To investigate the role of beta-ecdysone in modulating cellular coupling during insect metamorphosis.
    • To explore the involvement of cyclic adenosine monophosphate (cyclic AMP) and calcium ions (Ca2+) in regulating these communication changes.

    Main Methods:

    • In vitro experiments were conducted to observe cellular coupling.
    • The effects of beta-ecdysone, cyclic AMP, and Ca2+ on electrical coupling were measured.

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    Main Results:

    • Beta-ecdysone was found to mimic the initial phase of metamorphic changes by increasing electrical coupling.
    • Both cyclic AMP and Ca2+ demonstrated the ability to reverse the natural and beta-ecdysone-stimulated changes in cellular coupling.

    Conclusions:

    • Ecdysone likely influences intercellular communication by altering intracellular levels of cyclic AMP and Ca2+.
    • Transient modifications in intercellular communication preceding metamorphosis may signal the initiation of epidermal proliferation and pattern formation.