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The Ets factor Spi-B is a direct critical target of the coactivator OBF-1.

ABSTRACT: OBF-1 (Bob.1, OCA-B) is a lymphoid-specific transcriptional coactivator that associates with the transcription factors Oct-1 or Oct-2 on the conserved octamer element present in the promoters of several ubiquitous and lymphoid-specific genes. OBF-1-deficient mice have B cell-intrinsic defects, lack germinal centers, and have severely impaired immune responses to T cell-dependent antigens. Crucial genes that are regulated by OBF-1 and that might explain the observed phenotype of OBF-1 deficiency have remained elusive to date. Here we have generated transgenic mice expressing OBF-1 specifically in T cells and examined these together with mice lacking OBF-1 to discover transcriptional targets of this coactivator. Using microarray analysis, we have identified the Ets transcription factor Spi-B as a direct target gene critically regulated by OBF-1 that can help explain the phenotype of OBF-1-deficient mice. Spi-B has been implicated in signaling pathways downstream of the B cell receptor and is essential for germinal center formation and maintenance. The present findings establish a hierarchy between these two factors and provide a molecular link between OBF-1 and B cell receptor signaling.

SUBMITTER: Bartholdy B

PROVIDER: S-EPMC1513538 | biostudies-literature |

REPOSITORIES: biostudies-literature

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The Ets transcription factor Spi-B is essential for the differentiation of intestinal microfold cells.

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Ets homologous factor has critical roles in epithelial dysfunction in airway disease

Project description:This SuperSeries is composed of the SubSeries listed below.

2017-05-22 | GSE85403 | GEO

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2015-11-05 | E-MTAB-3987 | biostudies-arrayexpress

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2014-11-10 | GSE58128 | GEO

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