p190-B RhoGAP regulates the functional composition of the mesenchymal microenvironment.
p190-B RhoGAP regulates the functional composition of the mesenchymal microenvironment.
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作者:
Hematopoiesis is regulated by components of the microenvironment, so-called niche. Here, we show that p190-B GTPase Activating Protein (p190-B) deletion in mice causes hematopoietic failure during ontogeny, in p190-B−/− fetal liver and bones, and in p190-B+/− adult bones and spleen. These defects are non-cell autonomous, since we previously showed that transplantation of p190-B−/− hematopoietic cells into wild-type hosts leads to normal hematopoiesis. Coculture of mesenchymal stem/progenitor cells (MSC) and wild-type bone marrow cells reveals that p190-B−/− MSCs are dysfunctional in supporting hematopoiesis due to impaired Wnt signaling. Furthermore, p190-B loss causes alteration in bone marrow niche composition, including abnormal CFU-fibroblast, CFU-adipocyte and CFU-osteoblast numbers. This is due to altered MSC lineage fate specification to osteoblast and adipocyte lineages. Thus, p190-B organizes a functional mesenchymal/microenvironment for normal hematopoiesis during development.
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影响因子:
15.3
作者:
Arai, F;Ohneda, O;Suda, T
通讯作者:
Suda, T
影响因子:
64.8
作者:
Chan, Charles K. F.;Chen, Ching-Cheng;Luppen, Cynthia A.;Kim, Jae-Beom;DeBoer, Anthony T.;Wei, Kevin;Helms, Jill A.;Kuo, Calvin J.;Kraft, Daniel L.;Weissman, Irving L.
通讯作者:
Weissman, Irving L.
DOI:
10.1007/s12015-006-0052-5
发表时间:
2006-01-01
期刊:
STEM CELL REVIEWS
影响因子:
--
作者:
Badillo, Andrea T.;Flake, Alan W.
通讯作者:
Flake, Alan W.
影响因子:
20.3
作者:
Geiger, H;True, JM;Van Zant, G
通讯作者:
Van Zant, G
DOI:
10.1073/pnas.0712053105
发表时间:
2008-02-12
影响因子:
11.1
作者:
Claycombe, Kate;King, Louis E.;Fraker, Pamela J.
通讯作者:
Fraker, Pamela J.