Methodology for Whole Mount and Fluorescent RNA In Situ Hybridization in Echinoderms: Single, Double, and Beyond

Area of Science:

• Developmental Biology
• Molecular Biology
• Cell Biology

Background:

• Understanding RNA localization is crucial for deciphering gene function within cells, tissues, and embryos.
• Traditional methods for RNA localization can be limiting in complex biological systems like whole embryos.

Purpose of the Study:

• To showcase the utility of fluorescence in situ hybridization (FISH) for localizing specific RNA in whole mount echinoderm embryos.
• To enhance FISH technology by enabling multiplexed RNA detection and integration with immunofluorescence.

Main Methods:

• Application of fluorescence in situ hybridization (FISH) techniques on whole mount echinoderm embryos.
• Utilized various probe-labeling strategies for simultaneous detection of multiple RNA targets (colabeling).
• Incorporated immunofluorescence methods to combine RNA localization with protein detection in situ.

Main Results:

• Successfully localized specific RNA accumulation sites within whole mount echinoderm embryos using FISH.
• Demonstrated the feasibility of multiplexed RNA detection and combined RNA-protein analysis in a single assay.
• Provided detailed protocols, alternative approaches, and troubleshooting guidance for the described methods.

Conclusions:

• Echinoderm embryos are highly suitable models for advanced in situ hybridization techniques.
• The described protocols significantly enhance the ability to study RNA localization and function in developmental contexts.
• These methods are broadly applicable to diverse cell, tissue, and embryonic systems for in situ analysis.