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Related Experiment Video

Updated: Aug 29, 2025

In Situ Hybridization Combined with Immunohistochemistry in Cryosectioned Zebrafish Embryos
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Comparative in situ hybridization protocols in zebrafish.

Krista Dunn1, Apoorva Vashisht1, Dena R Hammond-Weinberger1

  • 1Department of Biology, Murray State University, Murray, KY, USA.

Biotechniques
|September 6, 2022
PubMed
Summary
This summary is machine-generated.

This study optimized double in situ hybridization in zebrafish embryos by testing additives and stain pairings. The nitro-blue tetrazolium chloride/5-bromo-4-chloro-3-indolyl phosphate (BCIP) + Fast Red/BCIP combination proved most effective for gene expression analysis.

Keywords:
Cabin1atoh1bcomparativegene expression analysisprotocolstaintechniquezebrafish

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Area of Science:

  • Molecular Biology
  • Developmental Biology
  • Genetics

Background:

  • In situ hybridization is crucial for studying gene expression patterns.
  • Double in situ hybridization is complex and requires optimization.
  • Zebrafish embryos are a valuable model for developmental studies.

Purpose of the Study:

  • To optimize double in situ hybridization protocols in zebrafish embryos.
  • To evaluate the efficacy of optional additives and colorimetric stain pairings.
  • To demonstrate the spatial expression of Cabin1 and atoh1b genes.

Main Methods:

  • Standard in situ hybridization protocol was modified with polyvinyl alcohol and dextran sulfate.
  • Multiple colorimetric stain pairings were tested for double in situ hybridization.
  • Zebrafish embryos were used to assess gene expression of Cabin1 and atoh1b.

Main Results:

  • Optional additives improved staining time and reduced background noise.
  • The nitro-blue tetrazolium chloride/5-bromo-4-chloro-3-indolyl phosphate (BCIP) + Fast Red/BCIP stain pairing was most effective.
  • Distinct expression patterns for Cabin1 and atoh1b were observed in the developing zebrafish brain.

Conclusions:

  • Optimized double in situ hybridization protocols enhance efficiency and reduce troubleshooting.
  • The identified stain pairing offers a reliable method for simultaneous gene detection.
  • This study provides foundational data on Cabin1 and atoh1b expression in zebrafish brain development.