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Automating Tumor Implantation in Zebrafish Larvae for Cancer Research and Medicine
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Automated microinjection for zebrafish xenograft models.

Yi Ding1, Kees-Jan van der Kolk1, Wietske van der Ent2

  • 1Life Science Methods BV, Leiden, the Netherlands.

Npj Biomedical Innovations
|April 24, 2026
PubMed
Summary

A new automated microinjection robot enhances zebrafish xenograft models for cancer research. This technology improves efficiency and accuracy, aiding drug discovery and patient diagnostics.

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Area of Science:

  • * Comparative medicine and experimental therapeutics.
  • * Zebrafish models in oncology and drug development.

Background:

  • * Zebrafish xenograft models show promise for predicting patient responses to cancer therapies.
  • * Manual microinjection into zebrafish larvae is labor-intensive, requires specialized training, and suffers from variability, hindering broader application.
  • * Current limitations impede the full potential of zebrafish models in clinical diagnostics and drug discovery pipelines.

Purpose of the Study:

  • * To develop and validate an automated microinjection robot for zebrafish xenograft models.
  • * To overcome the challenges associated with manual microinjection, including labor, training, and reproducibility.
  • * To enhance the efficiency, accuracy, and scalability of generating zebrafish xenograft models for research and diagnostics.

Main Methods:

  • * Design, construction, and validation of a novel microinjection robot system.
  • * Implementation of both fully automated and semi-automated injection modes.
  • * Injections targeted to specific zebrafish larval tissues: vasculature, perivitelline space, and hindbrain ventricle.

Main Results:

  • * The automated robot achieved an average injection success rate of approximately 60%.
  • * Larval survival rates exceeded 70%, demonstrating comparability to manual injection techniques.
  • * The fully automated mode operated twice as fast as manual methods, significantly improving throughput.

Conclusions:

  • * The automated microinjection robot successfully addresses key limitations of manual zebrafish xenograft model generation.
  • * Automation enhances reproducibility, efficiency, and accuracy, reducing the need for extensive operator training.
  • * This technology facilitates wider adoption of zebrafish xenograft models for accelerated drug discovery and personalized cancer diagnostics.