We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Impaired myelopoiesis in mice lacking the repressors of translation initiation, 4E-BP1 and 4E-BP2.
- Authors
Olson, Katie E.; Booth, Garrett C.; Poulin, Francis; Sonenberg, Nahum; Beretta, Laura
- Abstract
We investigated the role of two repressors of translation initiation in granulocytic differentiation using mice with a null mutation in the 4E-BP1 gene or with a null mutation in the 4E-BP2 gene. We show that 4E-BP1−/− and 4E-BP2−/− mice exhibit an increased number of immature granulocytic precursors, associated with a decreased number of mature granulocytic elements compared with wild-type mice, which is suggestive of an impaired granulocytic differentiation. Clonogenetic analyses revealed a reduced number of granulocytic colonies and concomitant increase in granulo-monocytic colonies in 4E-BP−/− mice. Finally, a slight expansion of monocytic cells was observed in the 4E-BP2−/− mice. In contrast, we did not observe any significant difference in thymocyte maturation in these mice. These results, together with the fact that 4E-BPs are markedly induced during granulo-monocytic differentiation of myeloid cells in vitro, highlight the pivotal role of 4E-BP1 and 4E-BP2 in the early phases of myelopoiesis. These results represent the first in vivo evidence of the involvement of translation in the early phases of granulo-monocytic differentiation and further extend the role of translation in haematopoietic differentiation.
- Subjects
GENETIC repressors; GRANULOCYTES; GENETIC mutation; GENES; MICE
- Publication
Immunology, 2009, Vol 128, Issue 1pt2, pe376
- ISSN
0019-2805
- Publication type
Article
- DOI
10.1111/j.1365-2567.2008.02981.x