T lymphocytes amplify the anabolic activity of parathyroid hormone through Wnt10b signaling.
T lymphocytes amplify the anabolic activity of parathyroid hormone through Wnt10b signaling.
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DOI:
10.1016/j.cmet.2009.07.010
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发表时间:
2009-09
期刊:
影响因子:
29
通讯作者:
Pacifici R
中科院分区:
文献类型:
--
作者:
Terauchi M;Li JY;Bedi B;Baek KH;Tawfeek H;Galley S;Gilbert L;Nanes MS;Zayzafoon M;Guldberg R;Lamar DL;Singer MA;Lane TF;Kronenberg HM;Weitzmann MN;Pacifici R
Intermittent administration of parathyroid hormone (iPTH) is used to treat osteoporosis as it improves bone architecture and strength, but the underlying cellular and molecular mechanisms are unclear. Here we show that iPTH increases the production of Wnt10b by bone marrow CD8+ T cells, and induces these lymphocytes to activate canonical Wnt-signaling in pre-osteoblasts. Accordingly, in responses to iPTH, T cell null mice display diminished Wnt signaling in pre-osteoblasts and blunted osteoblastic commitment, proliferation, differentiation and lifespan which result in decreased trabecular bone anabolism and no increase in strength. Demonstrating the specific role of lymphocytic Wnt10b, iPTH has no anabolic activity in mice lacking T cell produced Wnt10b. Therefore, T cell mediated activation of Wnt signaling in osteoblastic cells plays a key permissive role in the mechanism by which iPTH increases bone strength, suggesting that T cell osteoblast cross-talk pathways may provide pharmacological targets for bone anabolism.
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