Konjac Ceramide (kCer) Regulates NGF-Induced Neurite Outgrowth via the Sema3A Signaling Pathway

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  • Usuki Seigo
    Lipid Biofunction Section, Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University
  • Tamura Noriko
    National Institute of Advanced Industrial Science and Technology (AIST)
  • Yuyama Kohei
    Lipid Biofunction Section, Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University
  • Tamura Tomohiro
    National Institute of Advanced Industrial Science and Technology (AIST)
  • Mukai Katsuyuki
    R&D Headquarters, Daicel Corporation
  • Igarashi Yasuyuki
    Lipid Biofunction Section, Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University

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  • Konjac ceramide (kCer) regulates NGF-Induced neurite outgrowth via the sema3A sgnaling pathway

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Abstract

<p>The tuber of the konjac plant is a source enriched with GlcCer (kGlcCer), and has been used as a dietary supplement to improve the dry skin and itching that are caused by a deficiency of epidermal ceramide. Previously, we showed chemoenzymatically prepared konjac ceramide has a neurite-outgrowth inhibitory effect that is very similar to that of Sema3A and is not seen with animal-type ceramides. While, it has been unclear whether kCer may act on Sema3A or TrkA signaling pathway. In the present study, we showed kCer induces phosphorylation of CRMP2 and microtubules depolymerization via Sema3A signaling pathway not TrkA. It is concluded that kCer may be a potential Sema3A-like agonist that activates Sema3A signaling pathway directly.</p>

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