| First Author | Domen J | Year | 1993 |
| Journal | J Exp Med | Volume | 178 |
| Issue | 5 | Pages | 1665-73 |
| PubMed ID | 8228813 | Mgi Jnum | J:15285 |
| Mgi Id | MGI:63413 | Doi | 10.1084/jem.178.5.1665 |
| Citation | Domen J, et al. (1993) Pim-1 levels determine the size of early B lymphoid compartments in bone marrow. J Exp Med 178(5):1665-73 |
| abstractText | The mouse proto-oncogene Pim-1, which encodes two cytoplasmic serine-threonine-specific protein kinases, is frequently activated by proviral insertion in murine leukemia virus-induced hematopoietic tumors. Transgenic mice overexpressing Pim-1 show a low incidence of spontaneous T cell lymphomas, whereas null mutant mice lack an obvious phenotype. We have analyzed the early B lymphoid compartment from both null mutant and E mu-Pim-1 transgenic mice. The level of Pim-1 expression appears to be a determining factor in the ability of these cells to respond to the growth factors interleukin 7 (IL-7) and SF (steel factor). The impaired response in null mutant mice could be rescued by introduction of a functional Pim-1 transgene. Moreover, overexpression of Pim-1 facilitates the derivation of primitive lymphoid cell lines that are dependent on combined stimulation with IL-7 and SF or insulin-like growth factor 1. These results for the first time identify the involvement of Pim-1 in a normal cellular function, as an important regulator of early B lymphopoiesis in mice. |
