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Developmental nicotine exposure affects larval brain size and the adult dopaminergic system of Drosophila melanogaster.

BMC developmental biology·2018
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A Drosophila model for developmental nicotine exposure.

Norma Andrea Velazquez-Ulloa1

  • 1Biology Department, Lewis & Clark College, Portland, Oregon, United States of America.

Plos One
|May 13, 2017
PubMed
Summary

Fruit flies exposed to nicotine show developmental and behavioral changes mirroring mammals. This research highlights Drosophila melanogaster as a model for understanding nicotine

Area of Science:

  • Developmental biology
  • Neuroscience
  • Pharmacology

Background:

  • Nicotine exposure during development poses health risks, yet mechanisms remain unclear.
  • Pregnant women's continued smoking highlights the need to understand developmental nicotine effects.
  • Drosophila melanogaster offers a powerful model for genetic and molecular studies of drug effects.

Purpose of the Study:

  • To investigate Drosophila melanogaster as a model for elucidating nicotine's developmental and behavioral effects.
  • To identify molecular mechanisms underlying nicotine's impact on development using Drosophila.

Main Methods:

  • Rearing Drosophila melanogaster on nicotine-infused food.
  • Observing and quantifying developmental parameters (survival, weight, developmental time).

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  • Assessing behavioral responses to nicotine and ethanol, including sensitivity and sedation.

    • Main Results:

    • Nicotine-exposed Drosophila exhibited reduced survival and weight, prolonged development, and decreased sensitivity to nicotine and ethanol.
    • The Drosophila nicotinic acetylcholine receptor subunit alpha 7 (Dα7) was found to mediate some of these observed effects.
    • A novel role for Dα7 in modulating ethanol sedation in Drosophila was identified.

    Conclusions:

    • Drosophila melanogaster serves as a viable model organism for studying the developmental effects of nicotine.
    • The Dα7 receptor plays a significant role in mediating nicotine's impact on development and behavior.
    • Further research with Drosophila's genetic tools can uncover detailed mechanisms of developmental nicotine exposure.