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- W2097431653 abstract "Apoptotic-like phase is an essential step for the platelet formation from megakaryocytes. How controlled is this signaling pathway remained poorly understood. The aim of this study was to determine whether endoplasmic reticulum (ER) stress-induced apoptosis occurs during thrombopoiesis.Investigation of ER stress and maturation markers in different models of human thrombopoiesis (CHRF, DAMI, MEG-01 cell lines, and hematopoietic stem cells: CD34(+)) as well as in immature pathological platelets clearly indicated that ER stress occurs transiently during thrombopoiesis. Direct ER stress induction by tunicamycin, an inhibitor of N-glycosylation, or by sarco/endoplasmic reticulum Ca(2+) ATPase type 3b overexpression, which interferes with reticular calcium, leads to some degree of maturation in megakaryocytic cell lines. On the contrary, exposure to salubrinal, a phosphatase inhibitor that prevents eukaryotic translation initiation factor 2α-P dephosphorylation and inhibits ER stress-induced apoptosis, decreased both expression of maturation markers in MEG-01 and CD34(+) cells as well as numbers of mature megakaryocytes and proplatelet formation in cultured CD34(+) cells.Taken as a whole, our research suggests that transient ER stress activation triggers the apoptotic-like phase of the thrombopoiesis process." @default.
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- W2097431653 date "2013-12-01" @default.
- W2097431653 modified "2023-09-29" @default.
- W2097431653 title "Crucial Role for Endoplasmic Reticulum Stress During Megakaryocyte Maturation" @default.
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- W2097431653 doi "https://doi.org/10.1161/atvbaha.113.302184" @default.
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