Cytokine receptor endocytosis: New kinase activity-dependent and -independent roles of PI3K

Ping Hung Chen, Huiyu Yao, Lily Jun Shen Huang

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Type I and II cytokine receptors are cell surface sensors that bind cytokines in the extracellular environment and initiate intracellular signaling to control processes such as hematopoiesis, immune function, and cellular growth and development. One key mechanism that regulates signaling from cytokine receptors is through receptor endocytosis. In this mini-review, we describe recent advances in endocytic regulations of cytokine receptors, focusing on new paradigms by which PI3K controls receptor endocytosis through both kinase activity-dependent and -independent mechanisms. These advances underscore the notion that the p85 regulatory subunit of PI3K has functions beyond regulating PI3K kinase activity, and that PI3K plays both positive and negative roles in receptor signaling. On the one hand, the PI3K/Akt pathway controls various aspects downstream of cytokine receptors. On the other hand, it stimulates receptor endocytosis and downregulation, thus contributing to signaling attenuation.

Original languageEnglish (US)
Article number78
JournalFrontiers in Endocrinology
Volume8
Issue numberMAY
DOIs
StatePublished - May 1 2017

Keywords

  • Cytokine receptor
  • Endocytic pathway
  • Endocytosis
  • PI3K
  • Receptor downregulation

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism

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