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Regulation of Metabolism01:19

Regulation of Metabolism

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Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
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Related Experiment Video

Updated: Sep 26, 2025

Measurement of Metabolic Rate in Drosophila using Respirometry
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Regulating metabolism to shape immune function: Lessons from Drosophila.

Michelle L Bland1

  • 1Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, VA, 22908, United States.

Seminars in Cell & Developmental Biology
|April 20, 2022
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Summary

The innate immune response in Drosophila melanogaster, involving Toll and Imd pathways, significantly alters host metabolism. Understanding these immunometabolic changes is crucial for host survival during infection.

Keywords:
DrosophilaInfectionInnate immunityMetabolism

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Area of Science:

  • Immunology
  • Metabolism
  • Drosophila melanogaster research

Background:

  • Pathogenic microbes pose severe threats to hosts, necessitating robust innate immune responses.
  • The Toll and Imd signaling pathways in Drosophila are key mediators of cellular and humoral immunity against invaders.
  • These immune pathways are intricately linked with host nutrient metabolism in organs like the fat body and gut.

Purpose of the Study:

  • To review the immunometabolic phenotypes resulting from innate immune activation.
  • To explore how metabolic regulation by immune signaling impacts host resistance and susceptibility to infection.
  • To discuss endocrine signaling and gene regulation mechanisms involved in host survival during infection.

Main Methods:

  • Review of existing literature on innate immunity and metabolism in Drosophila.
  • Analysis of how Toll and Imd pathway activation affects lipid, carbohydrate, and protein metabolism.
  • Examination of endocrine and gene regulatory changes during infection.

Main Results:

  • Innate immune activation via Toll and Imd pathways induces significant metabolic alterations.
  • Metabolic regulation by immune signaling can lead to both beneficial resistance/tolerance and detrimental pathology.
  • Changes in endocrine signaling and gene regulation are critical for mediating survival.

Conclusions:

  • Immunometabolic phenotypes are complex, influencing host-pathogen interactions.
  • Future research should focus on factors like sex, diet, and pathogen type in modifying these phenotypes.
  • Uncovering the precise mechanisms of immune-mediated metabolic regulation is a key future direction.