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Updated: Apr 27, 2026
Deciphering and Imaging Pathogenesis and Cording of Mycobacterium abscessus in Zebrafish Embryos
Published on: September 9, 2015
Macrophage-pathogen interactions in infectious diseases: new therapeutic insights from the zebrafish host model
Vincenzo Torraca1, Samrah Masud1, Herman P Spaink1
1Institute of Biology, Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands.
Abstract:
Studying macrophage biology in the context of a whole living organism provides unique possibilities to understand the contribution of this extremely dynamic cell subset in the reaction to infections, and has revealed the relevance of cellular and molecular processes that are fundamental to the cell-mediated innate immune response. In particular, various recently established zebrafish infectious disease models are contributing substantially to our understanding of the mechanisms by which different pathogens interact with macrophages and evade host innate immunity. Transgenic zebrafish lines with fluorescently labeled macrophages and other leukocyte populations enable non-invasive imaging at the optically transparent early life stages. Furthermore, there is a continuously expanding availability of vital reporters for subcellular compartments and for probing activation of immune defense mechanisms. These are powerful tools to visualize the activity of phagocytic cells in real time and shed light on the intriguing paradoxical roles of these cells in both limiting infection and supporting the dissemination of intracellular pathogens. This Review will discuss how several bacterial and fungal infection models in zebrafish embryos have led to new insights into the dynamic molecular and cellular mechanisms at play when pathogens encounter host macrophages. We also describe how these insights are inspiring novel therapeutic strategies for infectious disease treatment.
Insights
Zebrafish models reveal how macrophages, key immune cells, fight infections. This research uncovers cellular mechanisms and inspires new treatments for infectious diseases.
Area of Science:
- Immunology
- Developmental Biology
- Microbiology
Background:
- Macrophage biology is crucial for innate immunity and host-pathogen interactions.
- Understanding macrophage roles in infection requires in vivo studies.
- Zebrafish offer a unique model for studying dynamic immune responses.
Purpose of the Study:
- To review how zebrafish infectious disease models advance understanding of macrophage functions during infection.
- To highlight the insights gained from visualizing macrophage-pathogen interactions in real-time.
- To explore how these findings can inform novel therapeutic strategies.
Main Methods:
- Utilizing transgenic zebrafish lines with fluorescently labeled macrophages and leukocytes.
- Employing non-invasive imaging techniques in optically transparent zebrafish embryos.
- Developing vital reporters to probe immune defense mechanisms and subcellular compartments.
Main Results:
- Zebrafish models have elucidated complex macrophage behaviors in response to bacterial and fungal pathogens.
- Real-time visualization revealed macrophages' dual roles in controlling infection and facilitating pathogen spread.
- Insights into macrophage dynamics provide a deeper understanding of host-pathogen interplay.
Conclusions:
- Zebrafish infectious disease models are powerful tools for dissecting macrophage-mediated immunity.
- Visualizing cellular and molecular processes in vivo is key to understanding immune responses.
- Discoveries in zebrafish are paving the way for innovative therapeutic approaches against infectious diseases.
