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A Myc-regulated transcriptional network controls B-cell fate in response to BCR triggeringMurn, Jernej ...The B cell antigen receptor (BCR) is a signaling complex that mediates the differentiation of stage-specific cell fate decisions in B lymphocytes. While several studies have shown differences in ... signal transduction components as being key to contrasting phenotypic outcomes, little is known about the differential BCR-triggered gene transcription downstream of the signaling cascades. Results Here we define the transcriptional changes that underlie BCR-induced apoptosis and proliferation of immature and mature B cells, respectively. Comparative genome-wide expression profiling identified 24 genesthat discriminated between the early responses of the two cell types to BCR stimulation. Using mice with a conditional Myc-deletion, we validated the microarray data by demonstrating that Myc is critical to promoting BCR-triggered B-cell proliferation. We further investigated the Myc-dependent molecular mechanisms and found that Myc promotes a BCR-dependent clonal expansion of mature B cells by inducing proliferation and inhibiting differentiation. Conclusion This work provides the first comprehensive analysis of the early transcriptional events that lead to either deletion or clonal expansion of B cells upon antigen recognition, and demonstrates that Myc functions as the hub of a transcriptional network that control B-cell fatein the periphery.Source: BMC genomics [Elektronski vir]. - ISSN 1471-2164 (Vol. 10, no. 323, 2009, 13 str.)Type of material - e-articlePublish date - 2009Language - englishCOBISS.SI-ID - 2673521
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Murn, Jernej | 23418 |
Mlinarič-Raščan, Irena | 12443 |
Vaigot, Pierre | |
Alibert, Olivier | |
Frouin, Vincent | |
Gidrol, Xavier |
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