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Related Concept Videos

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Related Experiment Video

Updated: May 15, 2026

Assessing the Cellular Immune Response of the Fruit Fly, Drosophila melanogaster, Using an In Vivo Phagocytosis Assay
05:50

Assessing the Cellular Immune Response of the Fruit Fly, Drosophila melanogaster, Using an In Vivo Phagocytosis Assay

Published on: April 10, 2019

How the fly balances its ability to combat different pathogens.

Moria C Chambers1, Karla L Lightfield, David S Schneider

  • 1Department of Microbiology and Immunology, Stanford University, Stanford, California, United States of America.

Plos Pathogens
|December 29, 2012
PubMed
Summary
This summary is machine-generated.

Fruit fly immune responses involve melanization and phagocytosis. Phagocytosis aids survival against extracellular bacteria but harms survival against intracellular bacteria, revealing an immune trade-off.

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Area of Science:

  • Immunology
  • Genetics
  • Microbiology

Background:

  • Host health is influenced by complex interactions between immunity, genetics, and pathogens.
  • Immune responses, such as melanization and phagocytosis, are crucial for host survival but can have varied effects depending on the pathogen.
  • The transcription factor ets21c and its effector wntD play roles in the fly's immune landscape.

Purpose of the Study:

  • To investigate the roles of melanization and phagocytosis in the context of ets21c and wntD.
  • To determine how these immune components affect survival against different types of pathogens.
  • To identify potential trade-offs in immune responses.

Main Methods:

  • Utilizing genetic mutants affecting the fly's immune response.
  • Infecting flies with two distinct pathogens: intracellular Listeria monocytogenes and extracellular Streptococcus pneumoniae.
  • Analyzing survival rates and immune phenotypes.

Main Results:

  • Survival against L. monocytogenes requires both phagocytosis and melanization.
  • Survival against S. pneumoniae relies primarily on phagocytosis.
  • Increased phagocytic activity benefits S. pneumoniae infection but is detrimental during L. monocytogenes infection.

Conclusions:

  • Host survival depends on pathogen type and the specific immune mechanisms employed.
  • Immune responses exhibit trade-offs, where enhancing one aspect may compromise another.
  • The ets21c-wntD pathway modulates immune components influencing health outcomes.