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- W2146396197 abstract "Neurite growth requires neurite extension and retraction, which are associated with protein degradation. Autophagy is a conserved bulk degradation pathway that regulates several cellular processes. However, little is known about autophagic regulation during early neurite growth. In this study, we investigated whether autophagy was involved in early neurite growth and how it regulated neurite growth in primary cortical neurons. Components of autophagy were expressed and autophagy was activated during early neurite growth. Interestingly, inhibition of autophagy by atg7 small interfering RNA (siRNA) caused elongation of axons, while activation of autophagy by rapamycin suppressed axon growth. Surprisingly, inhibition of autophagy reduced the protein level of RhoA. Moreover, expression of RhoA suppressed axon overelongation mediated by autophagy inhibition, whereas inhibition of the RhoA signaling pathway by Y-27632 recovered rapamycin-mediated suppression of axon growth. Interestingly, hnRNP-Q1, which negatively regulates RhoA, accumulated in autophagy-deficient neurons, while its protein level was reduced by autophagy activation. Overall, our study suggests that autophagy negatively regulates axon extension via the RhoA-ROCK pathway by regulating hnRNP-Q1 in primary cortical neurons. Therefore, autophagy might serve as a fine-tuning mechanism to regulate early axon extension." @default.
- W2146396197 created "2016-06-24" @default.
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- W2146396197 date "2013-10-01" @default.
- W2146396197 modified "2023-10-15" @default.
- W2146396197 title "Autophagy Negatively Regulates Early Axon Growth in Cortical Neurons" @default.
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- W2146396197 doi "https://doi.org/10.1128/mcb.00627-13" @default.
- W2146396197 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3811863" @default.
- W2146396197 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23918799" @default.
- W2146396197 hasPublicationYear "2013" @default.
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