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Related Experiment Videos

A new histochemical double-stain method using three-dimensional analysis with confocal laser scanning microscopy

J J Kazama1, T Aikata, M Arakawa

  • 1Department of Medicine (II), Niigata University School of Medicine, Japan.

Biotechnic & Histochemistry : Official Publication of the Biological Stain Commission
|November 1, 1994
PubMed
Summary

This study introduces a novel double staining technique for visualizing proteins and enzyme activity in rat kidneys using confocal microscopy. The method successfully mapped the distribution of Spot 35-calbindin-D28K and Ca(2+)-ATPase, revealing distinct spatial patterns.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Microscopy

Background:

  • Simultaneous visualization of multiple targets within biological tissues is crucial for understanding cellular processes.
  • Confocal laser scanning microscopy offers high-resolution imaging but requires optimized staining techniques for complex analyses.

Purpose of the Study:

  • To develop and validate a new double staining technique combining immunohistochemistry and enzyme histochemistry.
  • To investigate the distribution of Spot 35-calbindin-D28K and Ca(2+)-ATPase in rat kidney tissue.

Main Methods:

  • A novel method utilizing confocal laser scanning microscopy in reflection mode for double staining.
  • Enzyme histochemistry for Ca(2+)-ATPase using lead precipitation, followed by immunohistochemistry for Spot 35-calbindin-D28K via indirect immunocolloidal gold with silver enhancement.

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  • Specimen processing involved dehydration, embedding in water-soluble resin, sectioning, and 3D reconstruction from serial optical slices.

    • Main Results:

    • The technique successfully visualized both Spot 35-calbindin-D28K immunoreactivity and Ca(2+)-ATPase activity in rat kidney sections.
    • Lead phosphate particles (Ca(2+)-ATPase) were observed deep within the tissue sections.
    • Silver-enhanced signals (Spot 35-calbindin-D28K) were primarily detected on the surface slices.
    • Stereoscopic imaging revealed distinct three-dimensional distributions for the two targets.

    Conclusions:

    • The developed double staining technique is effective for co-localizing enzyme activity and protein expression in tissue samples.
    • Confocal laser scanning microscopy in reflection mode provides valuable insights into the spatial relationships of cellular components.
    • The findings highlight differential distribution patterns of Ca(2+)-ATPase and Spot 35-calbindin-D28K in the rat kidney.