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 language | English (US) |
---|---|
Pages (from-to) | 984-997 |
Number of pages | 14 |
Journal | Immunity |
Volume | 38 |
Issue number | 5 |
DOIs | |
State | Published - May 23 2013 |
Externally published | Yes |
ASJC Scopus subject areas
- Immunology and Allergy
- Immunology
- Infectious Diseases