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Updated: Jun 2, 2026
11:24
Detection of Axonally Localized mRNAs in Brain Sections Using High-Resolution In Situ Hybridization
Published on: June 17, 2015
Translational regulation in growth cones
Hosung Jung1, Catherine M O'Hare, Christine E Holt
1Department of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge CB2 3DY, United Kingdom.
Current Opinion in Genetics & Development
|May 3, 2011
Summary
Local protein synthesis guides axonal growth cones (GCs) by precisely regulating mRNA localization. New findings reveal complex mRNA dynamics and translation control in response to guidance cues.
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Biology
Background:
- Axonal growth cones (GCs) navigate using external signals.
- Local protein synthesis within axons and GCs is crucial for this navigation.
- Subcellular mRNA localization enables precise gene regulation.
Purpose of the Study:
- To explore the complex mRNA repertoires in growing axons and GCs.
- To understand the mechanisms of mRNA targeting and translation control in neuronal development.
- To investigate the direct links between guidance receptors and protein synthesis machinery.
Main Methods:
- Genome-wide studies of mRNA expression in axons and GCs.
- Analysis of mRNA localization and targeting mechanisms.
- Investigation of translational regulation by guidance cues.
Main Results:
- Identified complex and dynamic mRNA repertoires in axons and GCs.
- Demonstrated selective axonal targeting of specific transcripts involving non-coding regions.
- Reported direct coupling of guidance receptors to protein synthesis machinery.
- Showed that guidance cues can repress translation.
Conclusions:
- Neuronal growth and guidance involve sophisticated, spatially precise local protein synthesis.
- mRNA localization and dynamic translational control are key regulatory mechanisms.
- These findings illuminate how distant cellular compartments respond to local environmental cues.
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