Optimisation of transfection conditions of CD34+ hematopoietic cells derived from human umbilical cord blood

• Authors: Tomasz Ołdak , Marcin Kruszewski , Eugeniusz Krzysztof Machaj , Agnieszka Gajkowska , Zygmunt Pojda
• Languages of publication: EN

Abstracts

EN

Human umbilical cord blood is frequently used as a source of transplantable hematopoietic cells and more recently as a target of gene therapy - a new approach for treatment of various disorders. The aim of our study was optimisation of the transfection conditions of cord blood-derived CD34+ hematopoietic cells. Mononuclear cells fraction was isolated from cord blood samples by density gradient centrifugation. Subsequently, CD34+ hematopoietic cells were separated on immunomagnetic MiniMACS columns. Pure population of CD34+ cells was incubated in a serum free medium supplemented with thrombopoietin, stem cell factor and Flt-3 ligand for 48 h and then transfected with plasmid DNA carrying the enhanced version of green fluorescent protein (EGFP) as a reporter gene. We studied the influence of various pulse settings and DNA concentrations on the transfection efficiency, measured by flow cytometry as the fluorescence of target cells due to the expression of EGFP. The optimal settings were as follows: 4 mm cuvette, 1600 μF, 550 V/cm, and 10 μg of DNA per 500 μl. With these settings we obtained a high transfection frequency (41.2%) without a marked decrease of cell viability. An increase of the pulse capacitance and/or of DNA concentration resulted in a greater electroporation efficiency, but also in a decrease of cell viability. In conclusion, the results described here allow one to recommend electroporation as an efficient method of gene delivery into CD34+ hematopoietic cells derived from human umbilical cord blood.

Keywords

EN

CD34+ cells; umbilical cord blood; green fluorescent protein; transfection

• Publisher: Polish Biochemical Society
• Journal: Acta Biochimica Polonica
• Year: 2002
• Volume: 49
• Issue: 3
• Pages: 625-632

Dates

published

2002

received

2002-05-21

revised

2002-08-12

accepted

2002-08-26

Contributors

author

Tomasz Ołdak

• Maria Skłodowska-Curie Memorial Cancer Center and Institute of Oncology, Warszawa, Poland

author

Marcin Kruszewski

• Maria Skłodowska-Curie Memorial Cancer Center and Institute of Oncology, Warszawa, Poland

author

Eugeniusz Krzysztof Machaj

• Military Institute of Hygiene and Epidemiology, Warszawa, Poland

author

Agnieszka Gajkowska

• Maria Skłodowska-Curie Memorial Cancer Center and Institute of Oncology, Warszawa, Poland

author

Zygmunt Pojda

• Military Institute of Hygiene and Epidemiology, Warszawa, Poland

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