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Identification of many microRNAs that copurify with polyribosomes in mammalian neurons.


ABSTRACT: Localized translation in mammalian dendrites may play a role in synaptic plasticity and contribute to the molecular basis for learning and memory. The regulatory mechanisms that control localized translation in neurons are not well understood. We propose a role for microRNAs (miRNAs), a class of noncoding RNAs, as mediators of neuronal translational regulation. We have identified 86 miRNAs expressed in mammalian neurons, of which 40 have not previously been reported. A subset of these miRNAs exhibits temporally regulated expression in cortical cultures. Moreover, all of the miRNAs that were tested cofractionate with polyribosomes, the sites of active translation. These findings indicate that a large, diverse population of miRNAs may function to regulate translation in mammalian neurons.

SUBMITTER: Kim J 

PROVIDER: S-EPMC314190 | biostudies-literature | 2004 Jan

REPOSITORIES: biostudies-literature

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Identification of many microRNAs that copurify with polyribosomes in mammalian neurons.

Kim John J   Krichevsky Anna A   Grad Yonatan Y   Hayes Gabriel D GD   Kosik Kenneth S KS   Church George M GM   Ruvkun Gary G  

Proceedings of the National Academy of Sciences of the United States of America 20031222 1


Localized translation in mammalian dendrites may play a role in synaptic plasticity and contribute to the molecular basis for learning and memory. The regulatory mechanisms that control localized translation in neurons are not well understood. We propose a role for microRNAs (miRNAs), a class of noncoding RNAs, as mediators of neuronal translational regulation. We have identified 86 miRNAs expressed in mammalian neurons, of which 40 have not previously been reported. A subset of these miRNAs exh  ...[more]

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