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Preparation of polysomal fractions from mouse brain synaptoneurosomes and analysis of polysomal-bound mRNAs.
Journal of Neuroscience Methods 2018 January 2
BACKGROUND: Here we describe a detailed, reliable protocol for isolation of polysomal fractions from mouse brain synaptoneurosomes. This method is an important tool to study local protein synthesis in neurons.
NEW METHOD: We combined rapid preparation of synaptoneurosomes by filtration with polysome profiling. We provide a detailed protocol highlighting difficulties and critical steps of: i) preparation of synaptoneurosomes; ii) polyribosome fractionation from synaptoneurosomes; iii) extraction of proteins and RNA from sucrose gradient fractions.
RESULTS: and Comparison with Existing Methods We fractionated polyribosomes from synaptoneurosomes and detected the association of Mmp9, Camk2a and Stx1B mRNA with polysomes in the unstimulated conditions. Synaptic stimulation led to increased levels of Mmp9 and Camk2a mRNA in the heavy polysomal fractions. We compared our protocol with existing methods CONCLUSIONS: We have developed a reliable, effective method to prepare polyribosomal fractions from synaptoneurosomes to study polyribosomal binding of mRNAs as an aspect of synaptic translation in vitro.
NEW METHOD: We combined rapid preparation of synaptoneurosomes by filtration with polysome profiling. We provide a detailed protocol highlighting difficulties and critical steps of: i) preparation of synaptoneurosomes; ii) polyribosome fractionation from synaptoneurosomes; iii) extraction of proteins and RNA from sucrose gradient fractions.
RESULTS: and Comparison with Existing Methods We fractionated polyribosomes from synaptoneurosomes and detected the association of Mmp9, Camk2a and Stx1B mRNA with polysomes in the unstimulated conditions. Synaptic stimulation led to increased levels of Mmp9 and Camk2a mRNA in the heavy polysomal fractions. We compared our protocol with existing methods CONCLUSIONS: We have developed a reliable, effective method to prepare polyribosomal fractions from synaptoneurosomes to study polyribosomal binding of mRNAs as an aspect of synaptic translation in vitro.
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