Novel NEMO/IκB kinase and NF-κB target genes at the pre-B to immature B cell transition

被引:136
作者
Li, J
Peet, GW
Balzarano, D
Li, XN
Massa, P
Barton, RW
Marcu, KB [1 ]
机构
[1] SUNY Stony Brook, Inst Cell & Dev Biol, Dept Biochem & Cell Biol, Stony Brook, NY 11794 USA
[2] SUNY Stony Brook, Inst Cell & Dev Biol, Grad Program Genet, Stony Brook, NY 11794 USA
[3] Boehringer Ingelheim Pharmaceut Inc, Ridgefield, CT 06877 USA
关键词
D O I
10.1074/jbc.M100846200
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The I kappaB kinase (IKK) signaling complex is responsible for activating NF-kappaB-dependent gene expression programs. Even though NF-kappaB-responsive genes are known to orchestrate stress-like responses, critical gaps in our knowledge remain about the global effects of NF-kappaB activation on cellular physiology. DNA microarrays were used to compare gene expression programs in a model system of 70Z/3 murine pre-B cells versus their IKK signaling-defective 1.3E2 variant with lipopolysaccharide (LPS), interleukin-l (IL-1), or a combination of LPS + phorbol 12-myristate 13-acetate under brief (2 h) or long term (12 h) stimulation. 70Z/3-1.3E2 cells lack expression of NEMO/IKK gamma /IKKAP-1/FIP-3, an essential positive effector of the IKK complex. Some stimulated hits were known NF-kappaB target genes, but remarkably, the vast majority of the up-modulated genes and an unexpected class of repressed genes were all novel targets of this signaling pathway, encoding transcription factors, receptors, extracellular ligands, and intracellular signaling factors. Thirteen stimulated (B-ATF, Pim-2, MyD118, Pea-15/MAT1, CD82, CD40L, Wnt10a, Notch 1, R-ras, Rgs-16, PAC-I, ISG15, and CD36) and five repressed (CCR2, VpreB, lambda5, SLPI, and CMAP/Cystatin7) genes, respectively, were bona fide NF-kappaB targets by virtue of their response to a transdominant I kappaB alpha SR (super repressor). MyD118 and ISG15, although directly induced by LPS stimulation, were unaffected by IL-1, revealing the existence of direct NF-kappaB target genes, which are not coinduced by the LPS and IL-1 Toll-like receptors.
引用
收藏
页码:18579 / 18590
页数:12
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