IL-4-induced transcription factor NFIL3/E4BP4 controls IgE class switching.
Proc Natl Acad Sci U S A
; 107(2): 821-6, 2010 Jan 12.
Article
in En
| MEDLINE
| ID: mdl-20080759
ABSTRACT
IL-4 signaling promotes IgE class switching through STAT6 activation and the induction of Ig germ-line epsilon (GLepsilon) transcription. Previously, we and others identified a transcription factor, Nfil3, as a gene induced by IL-4 stimulation in B cells. However, the precise roles of nuclear factor, IL-3-regulated (NFIL3) in IL-4 signaling are unknown. Here, we report that NFIL3 is important for IgE class switching. NFIL3-deficient mice show impaired IgE class switching, and this defect is B-cell intrinsic. The induction of GLepsilon transcripts after LPS and IL-4 stimulation is significantly reduced in NFIL3-deficient B cells. Expression of NFIL3 in NFIL3-deficient B cells restores the impairment of IgE production, and overexpression of NFIL3 in the presence of cycloheximide induces GLepsilon transcripts. Moreover, NFIL3 binds to Iepsilon promoter in vivo. Together, these results identify NFIL3 as a key regulator of IL-4-induced GLepsilon transcription in response to IL-4 and subsequent IgE class switching.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Immunoglobulin E
/
Immunoglobulin Switch Region
/
Interleukin-4
/
Basic-Leucine Zipper Transcription Factors
Type of study:
Prognostic_studies
Limits:
Animals
Language:
En
Journal:
Proc Natl Acad Sci U S A
Year:
2010
Document type:
Article
Affiliation country:
United States