Impact of cell purification technique of autologous human adult stem cells on inflammatory reaction.

Abstract

Adult stem cells have shown fantastic regenerative potential as the cellular components of biomaterial mediated tissue engineering. Realising the biomedical potential of human adult stem cells (hASCs) however will require delivery in an ultra- purified format, without competing cells which may mediate inflammation, fibrosis or tumorigenesis. Purifying ASCs involves exhuming cells from primary tissue using immunoaffinity; which isolates pure populations with the complication of retained immunoglobulin (Ig); the clinical impact of which is currently not known. One of the negative outcomes of retained surface Ig is exacerbation of inflammation by leucocyte Fc receptor (FcR) activation, with consequences ranging from inflammatory cytokine and ROS release to chronic inflammation. The balance of ROS within a tissue will impact the efficacy of a stem cell therapy as ROS play an important role in stem cell self renewal and differentiation. In this study we utilised a chemiluminescent monitoring technique based on a ROS excitable photoprotein Pholasin, to quantify leucocyte ROS production in response to xenogeneic and recombinant human Ig of varying class and isotype with applications in stem cell selection. We were able to demonstrate inter-class differences in leucocyte ROS response to Ig which also varied between donors. This study highlighted the potential for utilising this technique for personalisation of autologous ASC therapies. This would allow clinicians to perform a rapid pre-operative screen to maximise the probability for success of an ASC intervention based on cell isolation using an Ig most appropriate for a specific patient.

• Authors: John A Hunt, Matthew Fok, Nicholas Bryan
• Journal: Biomaterials (Biomaterials) Vol. 34 Issue 31 Pg. 7626-31 (Oct 2013) ISSN: 1878-5905 [Electronic] Netherlands
• PMID: 23871537 (Publication Type: Journal Article)
• Copyright: Copyright © 2013 Elsevier Ltd. All rights reserved.

Chemical References

• Immunoglobulins
• Reactive Oxygen Species

Topics

• Adult Stem Cells (cytology, immunology)
• Animals
• Humans
• Immunoglobulins (metabolism)
• Mice
• Reactive Oxygen Species (metabolism)
• Stem Cell Transplantation