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- W3019573617 abstract "ABSTRACT Adult hematopoietic stem cells (HSCs) produce the body’s full complement of blood and immune cells. They reside in specialized microenvironments, or niches, within the bone marrow. The perivascular niche near blood vessels is believed to help maintain primitive HSCs in an undifferentiated state but demonstration of this effect is difficult. In vivo studies make it challenging to determine the direct effect of the endosteal and perivascular niches as they can be in close proximity, and two-dimensional in vitro cultures often lack an instructive extracellular matrix environment. We describe a tissue engineering approach to develop and characterize a three-dimensional perivascular tissue model to investigate the influence of the perivascular secretome on HSC behavior. We generate 3D endothelial networks in methacrylamide-functionalized gelatin hydrogels using human umbilical vein endothelial cells (HUVECs) and mesenchymal stromal cells (MSCs). We identify a subset of secreted factors important for HSC function, and examine the response of primary murine HSCs in hydrogels to the perivascular secretome. Within 4 days of culture, perivascular conditioned media promoted maintenance of a greater fraction of hematopoietic stem and progenitor cells. This work represents an important first-generation perivascular model to investigate the role of niche secreted factors on the maintenance of primary HSCs." @default.
- W3019573617 created "2020-05-01" @default.
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- W3019573617 date "2020-04-27" @default.
- W3019573617 modified "2023-09-27" @default.
- W3019573617 title "Perivascular Secretome Influences Hematopoietic Stem Cell Maintenance in a Gelatin Hydrogel" @default.
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- W3019573617 doi "https://doi.org/10.1101/2020.04.25.061572" @default.
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