Myeloproliferative neoplasia remodels the endosteal bone marrow niche into a self-reinforcing leukemic niche.
Myeloproliferative neoplasia remodels the endosteal bone marrow niche into a self-reinforcing leukemic niche.
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DOI:
10.1016/j.stem.2013.06.009
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发表时间:
2013-09-05
期刊:
影响因子:
23.9
通讯作者:
Passegue, Emmanuelle
中科院分区:
文献类型:
--
作者:
Schepers, Koen;Pietras, Eric M.;Reynaud, Damien;Flach, Johanna;Binnewies, Mikhail;Garg, Trit;Wagers, Amy J.;Hsiao, Edward C.;Passegue, Emmanuelle
Multipotent stromal cells (MSC) and their osteoblastic lineage cell (OBC) derivatives are part of the BM niche and contribute to hematopoietic stem cells (HSC) maintenance. Here, we show that myeloproliferative neoplasia (MPN) progressively remodels the endosteal BM niche into a self-reinforcing leukemic niche that impairs normal hematopoiesis, favors leukemic stem cell (LSC) function and contributes to BM fibrosis. We show that leukemic myeloid cells stimulate MSCs to overproduce functionally altered OBCs, which accumulate in the BM cavity as inflammatory myelofibrotic cells. We identify roles for TPO, CCL3 and direct cell-cell interactions in driving OBC expansion, and for changes in TGFβ, Notch and inflammatory signaling in OBC remodeling. MPN-expanded OBCs, in turn, exhibit decreased expression of many HSC retention factors and severely compromised ability to maintain normal HSCs, but effectively support LSCs. Targeting this pathological interplay could represent a novel avenue to treat MPN patients and prevent myelofibrosis.
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