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- W2000675829 abstract "In previous work, two anatomically distinct-liver sinusoid endothelial cells (LEC): LEC-1 and LEC-2, have been described. We also reported that extramedullary hepatic hematopoiesis occurs only in close contact with LEC-1, suggesting that these cells may provide the microenvironment necessary for the maintenance and growth of hematopoietic cells. In the present work, we studied the capacity of LEC-1 and LEC-2 to maintain in vitro hematopoiesis. LEC-1 and LEC-2 were isolated and cloned from livers of adult mice. Bone marrow cells (BM) enriched with primitive hematopoietic progenitors were isolated from day-2, post-5-FU-treated mice (5-FUBMC). LEC-1 supported the maintenance and differentiation of hematopoietic progenitors for more than 6 weeks in vitro. In contrast, LEC-2 cells poorly supported the proliferation of hematopoietic cells for only two weeks of the co-culture. LEC-1 and 5-FUBMC cocultures showed cobblestone-area formation and the presence of hematopoietic progenitors that are able to form colonies (CFC) in the adhering fraction after six weeks of coculture. LEC-1 co-cultures treated with a cocktail of cytokines (stem cell factor, interleukin [IL]1alpha, IL-3, and Epo) showed that megakaryocyte (CFU-Mk) and erythrocyte progenitors (BFU-e) were present during the entire period of the culture. Granulocyte-macrophage progenitors (CFU-GM) were present only during the first three weeks of the culture. These results suggest that LEC-1, but not LEC-2, provide an appropriate hematopoietic microenvironment for supporting the proliferation and differentiation of primitive hematopoietic cells. This could explain the anatomical restriction of hematopoietic cells for growing in LEC-1 domains during liver extramedullary hematopoiesis." @default.
- W2000675829 created "2016-06-24" @default.
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- W2000675829 date "1997-07-01" @default.
- W2000675829 modified "2023-09-27" @default.
- W2000675829 title "Extramedullary hematopoiesis in the adult mouse liver is associated with specific hepatic sinusoidal endothelial cells" @default.
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- W2000675829 doi "https://doi.org/10.1002/hep.510260122" @default.
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