| First Author | Ferrero I | Year | 2013 |
| Journal | Eur J Immunol | Volume | 43 |
| Issue | 11 | Pages | 2845-53 |
| PubMed ID | 23881845 | Mgi Jnum | J:203008 |
| Mgi Id | MGI:5523755 | Doi | 10.1002/eji.201343527 |
| Citation | Ferrero I, et al. (2013) DL4-mediated Notch signaling is required for the development of fetal alphabeta and gammadelta T cells. Eur J Immunol 43(11):2845-53 |
| abstractText | T-cell development depends upon interactions between thymocytes and thymic epithelial cells (TECs). The engagement of delta-like 4 (DL4) on TECs by Notch1 expressed by blood-borne BM-derived precursors is essential for T-cell commitment in the adult thymus. In contrast to the adult, the earliest T-cell progenitors in the embryo originate in the fetal liver and migrate to the nonvascularized fetal thymus via chemokine signals. Within the fetal thymus, some T-cell precursors undergo programmed TCRgamma and TCRdelta rearrangement and selection, giving rise to unique gammadelta T cells. Despite these fundamental differences between fetal and adult T-cell lymphopoiesis, we show here that DL4-mediated Notch signaling is essential for the development of both alphabeta and gammadelta T-cell lineages in the embryo. Deletion of the DL4 gene in fetal TECs results in an early block in alphabeta T-cell development and a dramatic reduction of all gammadelta T-cell subsets in the fetal thymus. In contrast to the adult, no dramatic deviation of T-cell precursors to alternative fates was observed in the fetal thymus in the absence of Notch signaling. Taken together, our data reveal a common requirement for DL4-mediated Notch signaling in fetal and adult thymopoiesis. |
