Abstract
Nipradilol (Nip) is registered as an anti-glaucoma agent. More recently, a protective effect of Nip has been demonstrated in retinal ganglion cells (RGCs) mediated by S-nitrosylation of antioxidative-related Keap1 protein due to its nitric oxide (NO)-donating effect. It also has been reported that Nip promoted axon outgrowth in cat RGCs. However, the detailed mechanism remains unclear. NO physiologically regulates numerous cellular responses through S-nitrosylation of protein at cysteine residues. It has been reported that phosphatase and tensin homologue deleted on chromosome 10 (PTEN) deletion strongly showed axon regeneration after optic nerve injury. PTEN inactivation by S-nitrosylation results in the accumulation of phosphatidylinositol (3, 4, 5) triphosphate (PIP3) and the activation of Akt/mammalian target of rapamycin (mTOR) signaling. The ribosomal S6 kinase 1 (S6K) which can monitor as phospho-S6 (pS6) is one of major target of mTOR. In this study, we investigated the possibility that Nip can promote axon outgrowth in RGCs by Akt/mTOR signaling thorough S-nitrosylation of PTEN.
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Koriyama, Y., Kamiya, M., Arai, K., Sugitani, K., Ogai, K., Kato, S. (2014). Nipradilol Promotes Axon Regeneration Through S-Nitrosylation of PTEN in Retinal Ganglion Cells. In: Ash, J., Grimm, C., Hollyfield, J., Anderson, R., LaVail, M., Bowes Rickman, C. (eds) Retinal Degenerative Diseases. Advances in Experimental Medicine and Biology, vol 801. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-3209-8_94
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DOI: https://doi.org/10.1007/978-1-4614-3209-8_94
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