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MKP3 mediates the cellular response to FGF8 signalling in the vertebrate limb

Academic Article
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Overview

authors

  • Kawakami, Y.
  • Rodriguez-Leon, J.
  • Koth, C. M.
  • Buscher, D.
  • Itoh, T.
  • Raya, A.
  • Ng, J. K.
  • Esteban, C. R.
  • Takahashi, S.
  • Henrique, D.
  • Schwarz, M. F.
  • Asahara, Hiroshi
  • Belmonte, J. C. I.

publication date

  • June 2003

journal

  • Nature Cell Biology  Journal

abstract

  • The mitogen-activated protein kinase/extracellular signal-regulated kinase (MAPK/ERK) and phosphatidylinositol-3-OH kinase (PI3K)/Akt pathways are involved in the regulatory mechanisms of several cellular processes including proliferation, differentiation and apoptosis. Here we show that during chick, mouse and zebrafish limb/fin development, a known MAPK/ERK regulator, Mkp3, is induced in the mesenchyme by fibroblast growth factor 8 (FGF8) signalling, through the PI3K/Akt pathway. This correlates with a high level of phosphorylated ERK in the apical ectodermal ridge (AER), where Mkp3 expression is excluded. Conversely, phosphorylated Akt is detected only in the mesenchyme. Constitutively active Mek1, as well as the downregulation of Mkp3 by small interfering RNA (siRNA), induced apoptosis in the mesenchyme. This suggests that MKP3 has a key role in mediating the proliferative, anti-apoptotic signalling of AER-derived FGF8.

subject areas

  • Animals
  • Apoptosis
  • Chick Embryo
  • Dual Specificity Phosphatase 6
  • Embryo, Nonmammalian
  • Enzyme Activation
  • Extremities
  • Fibroblast Growth Factor 8
  • Fibroblast Growth Factors
  • Gene Expression Regulation, Developmental
  • MAP Kinase Signaling System
  • Mice
  • Molecular Sequence Data
  • Morphogenesis
  • Phosphatidylinositol 3-Kinases
  • Protein Serine-Threonine Kinases
  • Protein Tyrosine Phosphatases
  • Proto-Oncogene Proteins
  • Proto-Oncogene Proteins c-akt
  • Signal Transduction
  • Zebrafish
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Identity

International Standard Serial Number (ISSN)

  • 1465-7392

Digital Object Identifier (DOI)

  • 10.1038/ncb989

PubMed ID

  • 12766772
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Additional Document Info

start page

  • 513

end page

  • 519

volume

  • 5

issue

  • 6

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