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SCF (C-Kit Ligand) Recombinant Human Protein

SCF(C-Kit配体)重组人类蛋白

Company: Thermo Fisher Scientific
Catalog#: PHC2115
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Culture of Megakaryocytes from Human Peripheral Blood Mononuclear Cells
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2015-11-05
[Abstract]  Megakaryocytes are the precursor cells of platelets and are bona fide resident cells in the bone marrow but extremely low in numbers (~1% of total nucleated cells). Upon terminal differentiation, megakaryocytes increase their size, become polyploid and develop a demarcation membrane system. Mature megakaryocytes form proplatelets, which are cytoplasmic extensions that protrude through the endothelial cell layer of venous sinusoids within the bone marrow, entering into the blood circulation and, subsequently, releasing platelets. Despite limited in numbers, megakaryocytes have been successfully isolated from bone marrow (Tolhurst et al., 2012), adult peripheral blood (Mazur et al., 1990; Thornton et al., 1999), cord blood (Sun et al., 2004) and ... [摘要]  巨核细胞是血小板的前体细胞,并且是骨髓中的真正的驻留细胞,但数量非常低(约1%的总有核细胞)。在终末分化时,巨核细胞增加其大小,变成多倍体并形成分界膜系统。成熟巨核细胞形成前血小板,其是突出穿过骨髓内的静脉窦内皮的内皮细胞层的细胞质延伸,进入血液循环并随后释放血小板。尽管数量有限,但已经成功地从骨髓中分离出巨核细胞(Tolhurst等人,2012),成人外周血(Mazur等人,1990; Thornton (2004),以及来自胚胎干细胞(Pick等人,2013);脐带血(Sun等人,2004) Eto等人,2002)。这些方法依赖于使用针对巨核细胞表面标记(即CD41或CD42b)的抗体来分离富集的巨核细胞群的免疫染色。在这里,我们描述了一种培养方法,其中巨核细胞可以在体外从人外周血单核细胞(PBMC)直接生长和分化,而不需要初始分离CD34 + sup/+细胞。该方法基于先前公开的来自PBMC的人类红细胞祖细胞的培养方法(Borg等人,2010; Leberbauer等人,2005)。尽管在该培养方法中巨核细胞的纯度不是100%,但是可以使用BSA梯度或细胞分选技术进一步分离巨核细胞的富集级分。此外,我们的方法提供了在尚未分化的巨核细胞的最小扩增后冷冻培养物的可能性,与新鲜的不间断培养物相比,其在解冻后将产生相等的巨核细胞培养物。由于这已被证明难以与CD34 + ...

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