Nardosinone, the first enhancer of neurite outgrowth-promoting activity of staurosporine and dibutyryl cyclic AMP in PC12D cells

Ping Li, Kimihiro Matsunaga, Tohru Yamakuni, Yasushi Ohizumi

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

Nardosinone was isolated as an enhancer of nerve growth factor (NGF) from Nardostachys chinensis [Neurosci. Lett. 273 (1999) 53]. Nardosinone (0.1-100 μM) enhanced dibutyryl cyclic AMP (dbcAMP, 0.3 mM)- and staurosporine (10 nM)-induced neurite outgrowth from PC12D cells in a concentration-dependent manner. PD98059 (20 μM), a potent mitogen-activated protein (MAP) kinase kinase inhibitor, partially blocked enhancements of dbcAMP (0.3 mM)- or staurosporine (10 nM)-induced neurite outgrowth by nardosinone. Nardosinone alone had no effect on the phosphorylation of MAP kinase. The dbcAMP-induced increase in phosphorylation of MAP kinase was not affected by nardosinone. Staurosporine almost unaffected the phosphorylation of MAP kinase, and nardosinone potentiated the staurosporine-induced neurite outgrowth without stimulation of the phosphorylation of MAP kinase. Since it is known that MAP kinase signaling is required for neurite outgrowth in PC12D cells, these results suggest that nardosinone enhances staurosporine- or dbcAMP-induced neurite outgrowth from PC12D cells, probably by amplifying both the MAP kinase-dependent and -independent signaling pathways of dbcAMP and staurosporine. It is also suggested that nardosinone enhances a downstream step of MAP kinase in the MAP kinase-dependent signaling pathway. Nardosinone is the first enhancer of the neuritogenic action of dbcAMP and staurosporine and may become a useful pharmacological tool for studying the mechanism of action of not only NGF but also both the neuritogenic substances.

Original languageEnglish
Pages (from-to)177-183
Number of pages7
JournalDevelopmental Brain Research
Volume145
Issue number2
DOIs
Publication statusPublished - 2003 Nov 12

Keywords

  • Dibutyryl cyclic AMP
  • Mitogen-activated protein kinase
  • Nardosinone
  • Neurite outgrowth enhancer
  • PC12D cell
  • PD98059
  • Staurosporine

ASJC Scopus subject areas

  • Developmental Neuroscience
  • Developmental Biology

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