The Ets factor Spi-B is a direct critical target of the coactivator OBF-1
Details
Publication Year 2006-08-01, Volume 103, Issue #31, Page 11665-11670
Journal Title
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Publication Type
Journal Article
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.
Publisher
NATL ACAD SCIENCES
Keywords
CELL-SPECIFIC COACTIVATOR; IMMUNOGLOBULIN GENE-TRANSCRIPTION; OCA-B; PROMOTER ACTIVITY; MICE LACKING; POU DOMAIN; T-CELLS; EXPRESSION; BOB.1/OBF.1; RECEPTOR
Rights Notice
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Creation Date: 2006-08-01 12:00:00
Last Modified: 0001-01-01 12:00:00
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