Abstract:
:Using mouse optic nerve (ON) crush as a CNS injury model, we and others have found that activation of the mammalian target of rapamycin complex 1 (mTORC1) in mature retinal ganglion cells by deletion of the negative regulators, phosphatase and tensin homologue (PTEN), and tuberous sclerosis 1 promotes ON regeneration. mTORC1 activation inhibits eukaryotic translation initiation factor 4E-binding protein (4E-BP) and activates ribosomal protein S6 kinase 1 (S6K1), both of which stimulate translation. We reasoned that mTORC1's regeneration-promoting effects might be separable from its deleterious effects by differential manipulation of its downstream effectors. Here we show that S6K1 activation, but not 4E-BP inhibition, is sufficient to promote axon regeneration. However, inhibition of 4E-BP is required for PTEN deletion-induced axon regeneration. Both activation and inhibition of S6K1 decrease the effect of PTEN deletion on axon regeneration, implicating a dual role of S6K1 in regulating axon growth.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Yang L,Miao L,Liang F,Huang H,Teng X,Li S,Nuriddinov J,Selzer ME,Hu Ydoi
10.1038/ncomms6416subject
Has Abstractpub_date
2014-11-10 00:00:00pages
5416issn
2041-1723pii
ncomms6416journal_volume
5pub_type
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