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Updated: Jun 4, 2025

Drosophila melanogaster Larva Injection Protocol
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An efficient injection protocol for Drosophila larvae.

Sattar Soltani1, Nhan Huynh1, Kirst King-Jones1

  • 1Department of Biological Sciences, University of Alberta, G-504 Biological Sciences Bldg, Edmonton, Alberta, Canada, T6G 2E9.

Biology Methods & Protocols
|December 23, 2024
PubMed
Summary
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We developed an efficient intravenous injection method for Drosophila larvae, improving substance delivery for research. This technique successfully rescued genetic mutants, overcoming limitations of oral administration.

Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • Intravenous injection offers direct, rapid substance delivery, bypassing digestive system limitations.
  • Drosophila larvae are valuable genetic models but limited in substance exposure analysis.
  • Oral administration is often inefficient for poorly absorbed or degradable compounds.

Purpose of the Study:

  • To establish an efficient intravenous injection method for Drosophila larvae.
  • To demonstrate the utility of this method for delivering complex molecules.
  • To overcome limitations of oral administration in Drosophila research.

Main Methods:

  • Developed a protocol for intravenous injection in first- and second-instar Drosophila larvae.
  • Administered ferritin protein via injection and diet to Fer1HCH mutant larvae.
Keywords:
Drosophila larval drug deliverydrug administrationferritinferritin injectioninjectionlarval injection

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  • Assessed survival rates and developmental delays post-injection.

    • Main Results:

    • Achieved high survival rates with a slight developmental delay in injected Drosophila larvae.
    • Ferritin injection successfully rescued Fer1HCH mutants, unlike dietary administration.
    • Demonstrated the method's efficiency for delivering complex compounds.

    Conclusions:

    • Intravenous injection is a viable and effective method for substance delivery in Drosophila larvae.
    • This technique enhances the utility of Drosophila as a model for studying molecular effects of exposure.
    • The method is particularly useful for compounds compromised by oral delivery routes.