Activation of ribosomal S6 kinase (RSK) during porcine oocyte maturation

K. Sugiura, K. Naito, Naoki Iwamori, H. Kagii, S. Goto, S. Ohashi, H. Naruoka, E. Yada, K. Yamanouchi, H. Tojo

Research output: Contribution to journalArticle

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Abstract

The normal kinetics of ribosomal S6 kinase (RSK) during the meiotic maturation of porcine oocytes were examined. The phosphorylation states of RSK and extracellular signal-regulated kinase (ERK), major mitogen-activated protein (MAP) kinases in maturating porcine oocytes, were detected by Western blotting analysis. The S6 protein kinase activity was assayed using a specific substrate peptide which contained the major phosphorylation sites of S6 kinase. Full phosphorylation of RSK was correlated with ERK phosphorylation and was observed before germinal vesicle breakdown. S6 kinase activity was low in both freshly isolated and 20 h cultured oocytes. S6 kinase activity was significantly elevated in matured oocytes to a level about 6 times higher than that in freshly isolated oocytes. Furthermore, full phosphorylation of RSK was inhibited when oocytes were treated with U0126, a specific MAP kinase kinase inhibitor, in dose-dependent manner, indicating that RSK is one of the substrates of MAP kinase. These results suggest that the activation of RSK is involved in the regulation of meiotic maturation of porcine oocytes.

Original languageEnglish
Pages (from-to)31-36
Number of pages6
JournalZygote
Volume10
Issue number1
DOIs
Publication statusPublished - Feb 1 2002

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Ribosomal Protein S6 Kinases
Oocytes
Swine
Phosphorylation
Extracellular Signal-Regulated MAP Kinases
Mitogen-Activated Protein Kinases
Mitogen-Activated Protein Kinase Kinases
Protein Kinases
Western Blotting

All Science Journal Classification (ASJC) codes

  • Developmental Biology
  • Cell Biology

Cite this

Sugiura, K., Naito, K., Iwamori, N., Kagii, H., Goto, S., Ohashi, S., ... Tojo, H. (2002). Activation of ribosomal S6 kinase (RSK) during porcine oocyte maturation. Zygote, 10(1), 31-36. https://doi.org/10.1017/S0967199402002058

Activation of ribosomal S6 kinase (RSK) during porcine oocyte maturation. / Sugiura, K.; Naito, K.; Iwamori, Naoki; Kagii, H.; Goto, S.; Ohashi, S.; Naruoka, H.; Yada, E.; Yamanouchi, K.; Tojo, H.

In: Zygote, Vol. 10, No. 1, 01.02.2002, p. 31-36.

Research output: Contribution to journalArticle

Sugiura, K, Naito, K, Iwamori, N, Kagii, H, Goto, S, Ohashi, S, Naruoka, H, Yada, E, Yamanouchi, K & Tojo, H 2002, 'Activation of ribosomal S6 kinase (RSK) during porcine oocyte maturation', Zygote, vol. 10, no. 1, pp. 31-36. https://doi.org/10.1017/S0967199402002058
Sugiura, K. ; Naito, K. ; Iwamori, Naoki ; Kagii, H. ; Goto, S. ; Ohashi, S. ; Naruoka, H. ; Yada, E. ; Yamanouchi, K. ; Tojo, H. / Activation of ribosomal S6 kinase (RSK) during porcine oocyte maturation. In: Zygote. 2002 ; Vol. 10, No. 1. pp. 31-36.
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