Methylcobalamin (MeCbl), a vitamin B12 analog, promotes neurite outgrowth by activating Akt in neurons. However, Akt is involved in many cellular functions, and the downstream signal of Akt that promotes neurite outgrowth in neurons in the presence of MeCbl remains obscure. Mammalian target of rapamycin (mTOR) is a serine/threonine protein kinase that regulates multiple cellular functions including neurite outgrowth. mTOR is regarded as important for the regeneration of injured nerves. In this study, we examined the relationship between MeCbl and mTOR activity and found that MeCbl increases mTOR activity via the activation of Akt and promotes neurite outgrowth in cerebellar granule neurons via the activation of mTOR. (C) 2011 Elsevier Ireland Ltd. All rights reserved.
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Harvard Univ, Massachusetts Gen Hosp, Ctr Human Genet Res, Sch Med, Boston, MA 02114 USAHarvard Univ, Massachusetts Gen Hosp, Ctr Human Genet Res, Sch Med, Boston, MA 02114 USA
Han, Sangyeul
Polizzano, Carolyn
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Harvard Univ, Massachusetts Gen Hosp, Ctr Human Genet Res, Sch Med, Boston, MA 02114 USAHarvard Univ, Massachusetts Gen Hosp, Ctr Human Genet Res, Sch Med, Boston, MA 02114 USA
Polizzano, Carolyn
Nielsen, Gunnlaugur P.
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Harvard Univ, Massachusetts Gen Hosp, Dept Pathol, Sch Med, Boston, MA 02114 USAHarvard Univ, Massachusetts Gen Hosp, Ctr Human Genet Res, Sch Med, Boston, MA 02114 USA
Nielsen, Gunnlaugur P.
Hornicek, Francis J.
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Harvard Univ, Massachusetts Gen Hosp, Sch Med,Orthopaed Oncol Serv, Ctr Sarcoma & Connect Tissue Oncol, Boston, MA 02114 USAHarvard Univ, Massachusetts Gen Hosp, Ctr Human Genet Res, Sch Med, Boston, MA 02114 USA
Hornicek, Francis J.
Rosenberg, Andrew E.
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Harvard Univ, Massachusetts Gen Hosp, Dept Pathol, Sch Med, Boston, MA 02114 USAHarvard Univ, Massachusetts Gen Hosp, Ctr Human Genet Res, Sch Med, Boston, MA 02114 USA
Rosenberg, Andrew E.
Ramesh, Vijaya
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Harvard Univ, Massachusetts Gen Hosp, Ctr Human Genet Res, Sch Med, Boston, MA 02114 USAHarvard Univ, Massachusetts Gen Hosp, Ctr Human Genet Res, Sch Med, Boston, MA 02114 USA