Abstract:
:Nedd4 family interacting protein 1 (Ndfip1) is an adaptor protein that regulates Itch, an E3 ubiquitin ligase that ubiquitylates JunB, thereby preventing interleukin (IL)-4 and IL-5 production. Mice lacking Ndfip1 or Itch develop T helper type 2 (T(H)2)-mediated inflammation in the skin and lungs and die prematurely. In this study we show that Ndfip1-/- mice also develop inflammation in the gastrointestinal tract. Inflammation is characterized by infiltration of eosinophils and T cells and is accompanied by a failure to gain weight. T cells are both necessary and sufficient for eosinophil recruitment and inflammation. This is because Ndfip1-/- T cells become activated and produce IL-5. Itch mutant mice develop much less severe gastrointestinal inflammation, suggesting that Ndfip1 regulation of Itch cannot entirely account for this phenotype and that Ndfip1 has both Itch-dependent and Itch-independent roles. Ndfip1 may also regulate human disease. We found single-nucleotide polymorphisms in the Ndfip1 locus that associate with inflammatory bowel disease. Taken together, our data support a role for Ndfip1 in gastrointestinal inflammation in both mice and humans.
journal_name
Mucosal Immunoljournal_title
Mucosal immunologyauthors
Ramon HE,Riling CR,Bradfield J,Yang B,Hakonarson H,Oliver PMdoi
10.1038/mi.2010.69subject
Has Abstractpub_date
2011-05-01 00:00:00pages
314-24issue
3eissn
1933-0219issn
1935-3456pii
mi201069journal_volume
4pub_type
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