| First Author | Guimond M | Year | 2010 |
| Journal | J Immunol | Volume | 184 |
| Issue | 6 | Pages | 2769-75 |
| PubMed ID | 20142363 | Mgi Jnum | J:160121 |
| Mgi Id | MGI:4453438 | Doi | 10.4049/jimmunol.0900685 |
| Citation | Guimond M, et al. (2010) In vivo role of Flt3 ligand and dendritic cells in NK cell homeostasis. J Immunol 184(6):2769-75 |
| abstractText | IL-15 is required for NK cell development and homeostasis in vivo. Because IL-15 is presented in trans via its high-affinity IL-15Ralpha-chain to cells expressing the IL-15Rbetagamma complex, we postulated that certain IL-15-bearing cells must be required for NK cell homeostasis. Using IL-15(WT/WT) and IL-15(-/-) mice, bone marrow chimeras with normal cellularity, and a selective depletion of CD11c(hi) dendritic cells (DCs), we demonstrate that ablation of the resting CD11c(hi) DC population results in a highly significant decrease in the absolute number of mature NK cells. In contrast, administration of Flt3 ligand increases the CD11c(hi) DC population, which, when expressing IL-15, significantly expands mature NK cells via enhanced survival and proliferation. In summary, a CD11c(hi) DC population expressing IL-15 is required to maintain NK cell homeostasis under conditions of normal cellularity and also is required to mediate Flt3 ligand-induced NK cell expansion in vivo. |
