Temporal Coding of Insulin Action through Multiplexing of the AKT Pathway

Hiroyuki Kubota, Rei Noguchi, Yu Toyoshima, Yu ichi Ozaki, Shinsuke Uda, Kanako Watanabe, Wataru Ogawa, Shinya Kuroda

Research output: Contribution to journalArticlepeer-review

76 Citations (Scopus)

Abstract

One of the unique characteristics of cellular signaling pathways is that a common signaling pathway can selectively regulate multiple cellular functions of a hormone; however, this selective downstream control through a common signaling pathway is poorly understood. Here we show that the insulin-dependent AKT pathway uses temporal patterns multiplexing for selective regulation of downstream molecules. Pulse and sustained insulin stimulations were simultaneously encoded into transient and sustained AKT phosphorylation, respectively. The downstream molecules, including ribosomal protein S6 kinase (S6K), glucose-6-phosphatase (G6Pase), and glycogen synthase kinase-3β (GSK3β) selectively decoded transient, sustained, and both transient and sustained AKT phosphorylation, respectively. Selective downstream decoding is mediated by the molecules' network structures and kinetics. Our results demonstrate that the AKT pathway can multiplex distinct patterns of blood insulin, such as pulse-like additional and sustained-like basal secretions, and the downstream molecules selectively decode secretion patterns of insulin.

Original languageEnglish
Pages (from-to)820-832
Number of pages13
JournalMolecular Cell
Volume46
Issue number6
DOIs
Publication statusPublished - Jun 29 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Cell Biology

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