The thymic epithelial microRNA network elevates the threshold for infection-associated thymic involution via miR-29a mediated suppression of the IFN-alpha receptor
- Author(s)
- Papadopoulou, AS; Dooley, J; Linterman, MA; Pierson, W; Ucar, O; Kyewski, B; Zuklys, S; Hollander, GA; Matthys, P; Gray, DHD; De Strooper, B; Liston, A;
- Details
- Publication Year 2012-02,Volume 13,Issue #2,Page 181-187
- Journal Title
- NATURE IMMUNOLOGY
- Publication Type
- Journal Article
- Abstract
- Thymic output is a dynamic process, with high activity at birth punctuated by transient periods of involution during infection. Interferon-alpha (IFN-alpha) is a critical molecular mediator of pathogen-induced thymic involution, yet despite the importance of thymic involution, relatively little is known about the molecular integrators that establish sensitivity. Here we found that the microRNA network dependent on the endoribonuclease Dicer, and specifically microRNA miR-29a, was critical for diminishing the sensitivity of the thymic epithelium to simulated infection signals, protecting the thymus against inappropriate involution. In the absence of Dicer or the miR-29a cluster in the thymic epithelium, expression of the IFN-a receptor by the thymic epithelium was higher, which allowed suboptimal signals to trigger rapid loss of thymic cellularity.
- Publisher
- NATURE PUBLISHING GROUP
- Keywords
- POSITIVE SELECTION; T-CELLS; IN-VIVO; DICER; EXPRESSION; DIFFERENTIATION; MICE; ACTIVATION; RESPONSES; LINEAGE
- Research Division(s)
- Molecular Genetics Of Cancer
- Link To PubMed Central Version
- http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3647613/
- Publisher's Version
- https://doi.org/10.1038/ni.2193
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Creation Date: 2012-02-01 12:00:00