Abstract:
:The ST2L receptor for interleukin 33 (IL-33) mediates pulmonary inflammation and immune system-related disorders, such as asthma and rheumatoid arthritis. At present, very little is known about the molecular regulation of ST2L expression. Here we found that FBXL19, an 'orphan' member of the Skp1-Cullin-F-box family of E3 ubiquitin ligases, selectively bound to ST2L to mediate its polyubiquitination and elimination in the proteasome. Degradation of ST2L involved phosphorylation of ST2L at Ser442 catalyzed by the kinase GSK3β. Overexpression of FBXL19 abrogated the proapoptotic and inflammatory effects of IL-33 and lessened the severity of lung injury in mouse models of pneumonia. Our results suggest that modulation of the IL-33-ST2L axis by ubiquitin ligases might serve as a unique strategy for lessening pulmonary inflammation.
journal_name
Nat Immunoljournal_title
Nature immunologyauthors
Zhao J,Wei J,Mialki RK,Mallampalli DF,Chen BB,Coon T,Zou C,Mallampalli RK,Zhao Ydoi
10.1038/ni.2341subject
Has Abstractpub_date
2012-06-03 00:00:00pages
651-8issue
7eissn
1529-2908issn
1529-2916pii
ni.2341journal_volume
13pub_type
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