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Related Experiment Videos

Hoechst 33342 staining coupled with conventional histological technique.

W Sawicki1, S Moskalewski

  • 1Department of Histology and Embryology, Medical Academy, Warsaw, Poland.

Stain Technology
|July 1, 1989
PubMed
Summary

In vivo staining with Hoechst 33342 allows for distinct nuclear fluorescence in various mouse organs, even after decalcification. This method offers a viable alternative to traditional staining techniques for cell tracking.

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Area of Science:

  • Cell Biology
  • Histology
  • Biomedical Imaging

Background:

  • Accurate cellular visualization is crucial for biological research.
  • Traditional staining methods often require tissue sectioning and can be time-consuming.
  • In vivo staining offers potential advantages for tracking cells and assessing tissue viability.

Purpose of the Study:

  • To evaluate the efficacy of Hoechst 33342 for in vivo nuclear staining in mice.
  • To determine the persistence and distribution of Hoechst 33342 fluorescence in various organs.
  • To explore the utility of in vivo Hoechst 33342 staining as an alternative to post-sectioning staining methods.

Main Methods:

  • Hoechst 33342 was administered intravenously or intraperitoneally to mice.
  • Mice were euthanized at various time points (1 hr to 28 days) post-injection.

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  • Organs were fixed, paraffin-embedded, and examined for nuclear fluorescence; formic acid decalcification was performed on bone samples; splenocytes were stained in vitro or harvested post-injection and injected intramuscularly.

    • Main Results:

    • Distinct nuclear fluorescence was observed in organs other than the cerebral cortex, irrespective of administration route or survival time.
    • Fluorescence persisted in osteocytes even after formic acid decalcification of bone.
    • Hoechst 33342-stained splenocytes were detectable at the injection site 24 hours after intramuscular injection.

    Conclusions:

    • In vivo staining with Hoechst 33342 provides reliable nuclear visualization across multiple organs and time points.
    • The method is effective even after harsh treatments like formic acid decalcification, highlighting its robustness.
    • In vivo Hoechst 33342 staining is a promising alternative for cellular visualization and tracking, simplifying experimental workflows.