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Impact of oxygen levels on human hematopoietic stem and progenitor cell expansion

Tiwari, Abhilasha, Wong, Cynthia S., Nekkanti, Lakshmi P., Deane, James A., McDonald, Courtney, Jenkin, Graham and Kirkland, Mark A. 2016, Impact of oxygen levels on human hematopoietic stem and progenitor cell expansion, Stem cells and development, vol. 25, no. 20, pp. 1604-1613, doi: 10.1089/scd.2016.0153.

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Title Impact of oxygen levels on human hematopoietic stem and progenitor cell expansion
Author(s) Tiwari, Abhilasha
Wong, Cynthia S.
Nekkanti, Lakshmi P.
Deane, James A.
McDonald, Courtney
Jenkin, Graham
Kirkland, Mark A.
Journal name Stem cells and development
Volume number 25
Issue number 20
Start page 1604
End page 1613
Total pages 10
Publisher Mary Ann Liebert Publishers
Place of publication New Rochelle, N.Y.
Publication date 2016-10-15
ISSN 1557-8534
Summary Oxygen levels are an important variable during the in vitro culture of stem cells. There has been increasing interest in the use of low oxygen to maximize proliferation and, in some cases, effect differentiation of stem cell populations. It is generally assumed that the defined pO2 in the incubator reflects the pO2 to which the stem cells are being exposed. However, we demonstrate that the pO2 experienced by cells in static culture can change dramatically during the course of culture as cell numbers increase and as the oxygen utilization by cells exceeds the diffusion of oxygen through the media. Dynamic culture (whereby the cell culture plate is in constant motion) largely eliminates this effect, and a combination of low ambient oxygen and dynamic culture results in a fourfold increase in reconstituting capacity of human hematopoietic stem cells compared with those cultured in static culture at ambient oxygen tension. Cells cultured dynamically at 5% oxygen exhibited the best expansion: 30-fold increase by flow cytometry, 120-fold increase by colony assay, and 11% of human CD45 engraftment in the bone marrow of NOD/SCID mice. To our knowledge, this is the first study to compare individual and combined effects of oxygen and static or dynamic culture on hematopoietic ex vivo expansion. Understanding and controlling the effective oxygen tension experienced by cells may be important in clinical stem cell expansion systems, and these results may have relevance to the interpretation of low oxygen culture studies.
Language eng
DOI 10.1089/scd.2016.0153
Field of Research 060103 Cell Development, Proliferation and Death
110202 Haematology
Socio Economic Objective 920101 Blood Disorders
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Mary Ann Liebert Publishers
Free to Read? No
Free to Read Start Date 2017-11-01
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Document type: Journal Article
Collection: Institute for Frontier Materials
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Created: Mon, 05 Sep 2016, 11:20:08 EST

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