Flowing cells through pulsed electric fields efficiently purges stem cell preparations of contaminating myeloma cells while preserving stem cell function

Craiu, A., Saito, Y., Limon, A., Eppich, H. M., Olson, D. P., Rodrigues, Neil ORCID: https://orcid.org/0000-0002-1925-7733, Adams, G. B., Dombkowski, D., Richardson, P., Schlossman, R., Choi, P. S., Grogins, J., O'Connor, P. G., Cohen, K., Attar, E. C., Freshman, J., Rich, R., Mangano, J. A., Gribben, J. G., Anderson, K. C. and Scadden, D. T. 2005. Flowing cells through pulsed electric fields efficiently purges stem cell preparations of contaminating myeloma cells while preserving stem cell function. Blood 105 (5) , pp. 2235-2238. 10.1182/blood-2003-12-4399

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Abstract

Autologous stem cell transplantation, in the setting of hematologic malignancies such as lymphoma, improves disease-free survival if the graft has undergone tumor purging. Here we show that flowing hematopoietic cells through pulsed electric fields (PEFs) effectively purges myeloma cells without sacrificing functional stem cells. Electric fields can induce irreversible cell membrane pores in direct relation to cell diameter, an effect we exploit in a flowing system appropriate for clinical scale. Multiple myeloma (MM) cell lines admixed with human bone marrow (BM) or peripheral blood (PB) cells were passed through PEFs at 1.35 kV/cm to 1.4 kV/cm, resulting in 3- to 4-log tumor cell depletion by flow cytometry and 4.5- to 6-log depletion by tumor regrowth cultures. Samples from patients with MM gave similar results by cytometry. Stem cell engraftment into nonobese diabetic–severe combined immunodeficient (NOD/SCID)/β2m-/- mice was unperturbed by PEFs. Flowing cells through PEFs is a promising technology for rapid tumor cell purging of clinical progenitor cell preparations.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Biosciences European Cancer Stem Cell Research Institute (ECSCRI)
Publisher:	American Society of Hematology
ISSN:	0006-4971
Last Modified:	27 Oct 2022 08:49
URI:	https://orca.cardiff.ac.uk/id/eprint/63476

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