Detection of Axonally Localized mRNAs in Brain Sections Using High-Resolution <em>In Situ</em> Hybridization

Jimena Baleriola; Ying Jean; Carol Troy; Ulrich Hengst

doi:10.3791/52799

Detection of Axonally Localized mRNAs in Brain Sections Using High-Resolution In Situ Hy...

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Neuroscience

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JoVE Journal Neuroscience

Detection of Axonally Localized mRNAs in Brain Sections Using High-Resolution In Situ Hybridization

Detection of Axonally Localized mRNAs in Brain Sections Using High-Resolution In Situ Hybridization

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11:24 min

June 17, 2015

DOI: 10.3791/52799-v

Jimena Baleriola¹, Ying Jean¹, Carol Troy¹, Ulrich Hengst¹

¹College of Physicians and Surgeons,Columbia University

Overview

This study demonstrates the use of RNA in situ hybridization (ISH) combined with immunohistochemistry to visualize mRNAs in axons of mouse and human brain tissues. The method allows for the detection of localized mRNAs, providing insights into their role in neuroscience.

Key Study Components

Area of Science

Neuroscience
Molecular Biology
Gene Expression

Background

RNA in situ hybridization (ISH) is a technique for visualizing RNA within cells.
Understanding mRNA localization is crucial for studying gene expression in the brain.
Combining ISH with immunohistochemistry enhances detection capabilities.
This approach can reveal the spatial distribution of mRNAs in neural tissues.

Purpose of Study

To detect mRNAs localized to axons in brain samples.
To explore the relationship between mRNA localization and translation in neurons.
To validate the effectiveness of different unmasking procedures and staining methods.

Methods Used

Sample pretreatment involving boiling and protease digestion.
Hybridization of RNA probes to target mRNAs.
Amplification and detection steps for visualization.
Staining axons with antibodies or dyes for verification.

Main Results

Successful visualization of TF four mRNA in brain samples.
Demonstration of different unmasking procedures yielding consistent results.
Confirmation of mRNA localization to axons through microscopy analyses.
Insights into the translation of localized mRNAs in the brain.

Conclusions

The combined ISH and immunohistochemistry method is effective for studying mRNA localization.
This approach can help answer critical questions in neuroscience.
Further research can expand understanding of mRNA dynamics in neural tissues.

Frequently Asked Questions

What is RNA in situ hybridization?

RNA in situ hybridization (ISH) is a technique used to visualize the presence and localization of specific RNA molecules within fixed tissues and cells.

How does this study enhance our understanding of mRNA localization?

By combining ISH with immunohistochemistry, the study provides a clearer picture of where mRNAs are located within axons, shedding light on their functional roles.

What are the key steps in the experimental procedure?

The key steps include sample pretreatment, hybridization of RNA probes, amplification and detection, and staining with antibodies or dyes.

What were the main findings of the study?

The study found that TF four mRNA is localized to axons in brain samples, demonstrating the effectiveness of the methods used.

Why is mRNA localization important in neuroscience?

Understanding mRNA localization is crucial for elucidating how genes are expressed and regulated in specific cellular contexts, particularly in neurons.

What implications do the results have for future research?

The results suggest that this method can be used to explore mRNA dynamics and their roles in neuronal function and development.

RNA in situ hybridization (ISH) enables the visualization of RNAs in cells and tissues. Here we show how combination of RNAscope ISH with immunohistochemistry or histological dyes can be successfully used to detect mRNAs localized to axons in sections of mouse and human brains.

The overall goal of the following experiment is to detect accidentally localized mRNAs in adult brain samples. This is achieved by pretreating. The samples by boiling and protease digesting to unmask the mRNA molecules as a second step Hybridization is performed, followed by amplification and detection steps, which enable the visualization of the mRNA of interest.

Next axons are stained with antibodies or dyes in order to verify that the mRNA of interest is localized to axons. The results show the presence of a TF four mRNA in brain samples using different unmasking procedures and counters, staining methods based on microscopy analyses. This method can help answer questions in neuroscience such as which mRNAs are localized and translated in without exons.

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