文献类型：期刊文献

英文题名：Stem cell factor is essential for preserving NOD/SCID reconstitution capacity of ex vivo expanded cord blood CD34+ cells

作者：Du, Zheng[1];Wang, Ziyan[1];Zhang, Weiwei[1];Cai, Haibo[1];Tan, Wen-Song[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：48

期号：3

起止页码：293

外文期刊名：CELL PROLIFERATION

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000354212100004)】；

基金：This work was supported by the National Nature Science Foundation of China (20776043), the Key Project of Medicine, Shanghai (074319109) and the Open Project of State Key Laboratory of Bioreactor Engineering.

语种：英文

摘要：ObjectivesStem cell factor (SCF) is essential in the haematopoietic stem cells (HSCs) niche, and is therefore used extensively in haematopoietic stem and progenitor cells (HSPCs) exvivo expansion. However, in the literature, dose and schedule of SCF feeding varies widely. We previously proposed a novel SCF feeding regimen with proven effectiveness for HSPCs expansion; however, physiological function of expanded cells with this SCF feeding regimen required further research. Materials and methodsCD34(+) cells were cultured with or without SCF supplementation in serum-free medium for 10days. Expanded cells were transplanted into sublethally irradiated non-obese diabetic/severe combined immune-deficient (NOD/SCID) mice. Engraftment and multilineage reconstitution of transplanted cells were determined. Also, clonogenic potential of engrafted cells was analysed. ResultsCells, both cultured with and without SCF supplementation, successfully engrafted and reconstituted blood cell lineages in NOD/SCID mice. However, level of engraftment and multilineage reconstitution reduced when cells were expanded without SCF supplementation. Meanwhile, frequencies of colony-forming cells (CFCs) amongst bone marrow cells were higher in mice transplanted with CD34(+) cells expanded with SCF supplementation. ConclusionsReconstitution capacity reduced when CD34(+) cells were expanded without SCF supplementation, though this feeding regimen did not have any effect on cell expansion. This finding suggested that SCF was essential for preserving NOD/SCID reconstitution capacity of exvivo expanded CD34(+) cells.