High Efficiency Electroporation of Human Umbilical Cord Blood CD34+ Hematopoietic Precursor Cells
High Efficiency Electroporation of Human Umbilical Cord Blood CD34+ Hematopoietic Precursor Cells
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DOI：
10.1634/stemcells.19-6-492
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发表时间：
2001-11
期刊：
影响因子：
5.2
通讯作者：
Michael H. Wu;Stephen L. Smith;M. Dolan
中科院分区：
文献类型：
--
作者：
Michael H. Wu;Stephen L. Smith;M. Dolan
Human umbilical cord blood provides an alternative source of hematopoietic cells for purposes of transplantation or ex vivo genetic modification. The objective of this study was to evaluate electroporation as a means to introduce foreign genes into human cord blood CD34+ cells and evaluate gene expression in CD34+/CD38dim and committed myeloid progenitors (CD33+, CD11b+). CD34+ cells were cultured in X‐VIVO 10 supplemented with thrombopoietin, stem cell factor, and Flt‐3 ligand. Electroporation efficiency and cell viability measured by flow cytometry using enhanced green fluorescent protein (EGFP) as a reporter indicated 31% ± 2% EGFP+/CD34+ efficiency and 77% ± 3% viability as determined 48 hours post‐electroporation. The addition of allogeneic cord blood plasma increased the efficiency to 44% ± 5% with no effect on viability. Of the total CD34+ cells 48 hours post‐electroporation, 20% were CD38dim/EGFP+. CD34+ cells exposed to interleukin‐3, GM‐CSF and G‐CSF for an additional 11 days differentiated into CD33+ and CD11b+ cells, and 9% ± 3% and 8% ± 7% were expressing the reporter gene, respectively. We show that electroporation can be used to introduce foreign genes into early hematopoietic stem cells (CD34+/CD38dim), and that the introduced gene is functionally expressed following expansion into committed myeloid progenitors (CD33+, CD11b+) in response to corresponding cytokines. Further investigation is needed to determine the transgene expression in functional terminal cells derived from the genetically modified CD34+ cells, such as T cells and dendritic cells.
