The MicroRNA miR-181 Is a Critical Cellular Metabolic Rheostat Essential for NKT Cell Ontogenesis and Lymphocyte Development and Homeostasis

Jorge Henao-Mejia, Adam Williams, Loyal Goff, Matthew Staron, Paula Licona-Limón, SusanM Kaech, Maki Nakayama, JohnL Rinn, RichardA Flavell

Research output: Contribution to journalArticle

Abstract

Regulation of metabolic pathways in the immune system provides a mechanism to actively control cellular function, growth, proliferation, and survival. Here, we report that miR-181 is a nonredundant determinant of cellular metabolism and is essential for supporting the biosynthetic demands of early NKT cell development. As a result, miR-181-deficient mice showed a complete absence of mature NKT cells in the thymus and periphery. Mechanistically, miR-181 modulated expression of the phosphatase PTEN to control PI3K signaling, which was a primary stimulus for anabolic metabolism in immune cells. Thus miR-181-deficient mice also showed severe defects in lymphoid development and Tcell homeostasis associated with impaired PI3K signaling. These results uncover miR-181 as essential for NKT cell development and establish this family of miRNAs as central regulators of PI3K signaling and global metabolic fitness during development and homeostasis. •miR-181 regulates cellular metabolic fitness required for robust proliferation•miR-181 is essential for NKT cell development•miR-181 is a PTEN rheostat and a central regulator of the PI3K pathway invivo•miR-181 is a critical regulator of lymphocyte development and homeostasis.

Original languageEnglish (US)
Pages (from-to)984-997
Number of pages14
JournalImmunity
Volume38
Issue number5
DOIs
Publication statusPublished - May 23 2013
Externally publishedYes

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ASJC Scopus subject areas

  • Immunology and Allergy
  • Infectious Diseases
  • Immunology

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