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Updated: Nov 23, 2025
Isolation and Direct Neuronal Reprogramming of Mouse Astrocytes
Published on: July 7, 2022
Immunoprecipitation of Ribosome-Bound mRNAs from Astrocytic Perisynaptic Processes of the Mouse Hippocampus
Noémie Mazaré1, Marc Oudart1, Giselle Cheung2
1Physiology and Physiopathology of the Gliovascular Unit Research Group, Center for Interdisciplinary Research in Biology (CIRB), College de France, CNRS Unité Mixte de Recherche 724, INSERM Unité 1050, Labex Memolife, PSL Research University, Paris, France.
Abstract:
Translation of distally localized mRNAs is an evolutionary mechanism occurring in polarized cells. It has been observed in astrocytes, whose processes contact blood vessels and synapses. Here, we describe a protocol for the purification of the entire pool of ribosome-bound mRNAs in perisynaptic astrocytic processes (PAPs). Our procedure combines the preparation of synaptogliosomes with a refined translating ribosome affinity purification technique. This approach can be used in any brain region to probe the physiological relevance of local translation in PAPs. For complete details on the use and execution of this protocol, please refer to Mazaré et al. (2020).
Insights
Researchers developed a new method to isolate mRNAs within astrocyte processes. This technique helps study local protein synthesis in the brain, crucial for understanding neuronal function.
Area of Science:
- Neuroscience
- Cell Biology
- Molecular Biology
Background:
- Distal mRNA translation is vital in polarized cells like astrocytes.
- Astrocytic processes interact with synapses and blood vessels, highlighting the importance of local translation in these regions.
Purpose of the Study:
- To present a protocol for purifying ribosome-bound mRNAs in perisynaptic astrocytic processes (PAPs).
- To enable the study of local translation's physiological relevance in PAPs across any brain region.
Main Methods:
- The protocol integrates synaptogliosome preparation with translating ribosome affinity purification (TRAP).
- This refined TRAP technique allows for the isolation of the complete pool of ribosome-bound mRNAs.
Main Results:
- A robust protocol for isolating mRNAs from PAPs has been established.
- The method is applicable to various brain regions for investigating local translation.
Conclusions:
- The described protocol provides a valuable tool for neuroscience research.
- It facilitates the investigation of local mRNA translation in astrocytes, contributing to our understanding of brain function.
