| First Author | Koralov SB | Year | 2008 |
| Journal | Cell | Volume | 132 |
| Issue | 5 | Pages | 860-74 |
| PubMed ID | 18329371 | Mgi Jnum | J:135783 |
| Mgi Id | MGI:3794466 | Doi | 10.1016/j.cell.2008.02.020 |
| Citation | Koralov SB, et al. (2008) Dicer ablation affects antibody diversity and cell survival in the B lymphocyte lineage. Cell 132(5):860-74 |
| abstractText | To explore the role of Dicer-dependent control mechanisms in B lymphocyte development, we ablated this enzyme in early B cell progenitors. This resulted in a developmental block at the pro- to pre-B cell transition. Gene-expression profiling revealed a miR-17 approximately 92 signature in the 3'UTRs of genes upregulated in Dicer-deficient pro-B cells; a top miR-17 approximately 92 target, the proapoptotic molecule Bim, was highly upregulated. Accordingly, B cell development could be partially rescued by ablation of Bim or transgenic expression of the prosurvival protein Bcl-2. This allowed us to assess the impact of Dicer deficiency on the V(D)J recombination program in developing B cells. We found intact Ig gene rearrangements in immunoglobulin heavy (IgH) and kappa chain loci, but increased sterile transcription and usage of D(H) elements of the DSP family in IgH, and increased N sequence addition in Igkappa due to deregulated transcription of the terminal deoxynucleotidyl transferase gene. |
