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A standardized methodical approach to characterize the influence of key parameters on the in vitro efficacy of extracorporeal photopheresis
Extracorporeal photopheresis (ECP) is an autologous immunomodulatory cell therapy that consists of the ex vivo collection of mononuclear cells (MNCs), which are irradiated with UVA in the presence of the photosensitizing agent 8-methoxypsoralen (8-MOP) to induce cell apoptosis. This photoactivated c...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6396964/ https://www.ncbi.nlm.nih.gov/pubmed/30822323 http://dx.doi.org/10.1371/journal.pone.0212835 |
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author | Laulhé, Marie Lefebvre, Sylvie Le Broc-Ryckewaert, Delphine Pierre, Maxime Ferry, Aurélie Delorme, Bruno |
author_facet | Laulhé, Marie Lefebvre, Sylvie Le Broc-Ryckewaert, Delphine Pierre, Maxime Ferry, Aurélie Delorme, Bruno |
author_sort | Laulhé, Marie |
collection | PubMed |
description | Extracorporeal photopheresis (ECP) is an autologous immunomodulatory cell therapy that consists of the ex vivo collection of mononuclear cells (MNCs), which are irradiated with UVA in the presence of the photosensitizing agent 8-methoxypsoralen (8-MOP) to induce cell apoptosis. This photoactivated cell preparation is then reinfused into the patient. While the clinical benefits of ECP are well-demonstrated, no study has yet characterized the influence of variations in the composition of the cell preparation on the efficacy of ECP in vitro. Here, we describe a standardized methodology for the in vitro assessment of ECP that uses the human lymphoma T-cell line and mimics the clinical procedure. By quantifying cell apoptosis, inhibition of cell proliferation, and 8-MOP consumption, we used this approach to characterize the specific influence of key variables on the cellular response to ECP. We found that (i) increases in hematocrit and plasma concentrations attenuated the cellular response to ECP; (ii) plasma concentration was the only variable tested that influenced 8-MOP consumption; and (iii) the loss of efficacy due to variations in the concentration of certain blood components could be counteracted by modulating the UVA dose. This methodology may enable evaluation of other leukapheresis preparation protocols and better determination of the optimal working parameters for ECP. |
format | Online Article Text |
id | pubmed-6396964 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-63969642019-03-08 A standardized methodical approach to characterize the influence of key parameters on the in vitro efficacy of extracorporeal photopheresis Laulhé, Marie Lefebvre, Sylvie Le Broc-Ryckewaert, Delphine Pierre, Maxime Ferry, Aurélie Delorme, Bruno PLoS One Research Article Extracorporeal photopheresis (ECP) is an autologous immunomodulatory cell therapy that consists of the ex vivo collection of mononuclear cells (MNCs), which are irradiated with UVA in the presence of the photosensitizing agent 8-methoxypsoralen (8-MOP) to induce cell apoptosis. This photoactivated cell preparation is then reinfused into the patient. While the clinical benefits of ECP are well-demonstrated, no study has yet characterized the influence of variations in the composition of the cell preparation on the efficacy of ECP in vitro. Here, we describe a standardized methodology for the in vitro assessment of ECP that uses the human lymphoma T-cell line and mimics the clinical procedure. By quantifying cell apoptosis, inhibition of cell proliferation, and 8-MOP consumption, we used this approach to characterize the specific influence of key variables on the cellular response to ECP. We found that (i) increases in hematocrit and plasma concentrations attenuated the cellular response to ECP; (ii) plasma concentration was the only variable tested that influenced 8-MOP consumption; and (iii) the loss of efficacy due to variations in the concentration of certain blood components could be counteracted by modulating the UVA dose. This methodology may enable evaluation of other leukapheresis preparation protocols and better determination of the optimal working parameters for ECP. Public Library of Science 2019-03-01 /pmc/articles/PMC6396964/ /pubmed/30822323 http://dx.doi.org/10.1371/journal.pone.0212835 Text en © 2019 Laulhé et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Laulhé, Marie Lefebvre, Sylvie Le Broc-Ryckewaert, Delphine Pierre, Maxime Ferry, Aurélie Delorme, Bruno A standardized methodical approach to characterize the influence of key parameters on the in vitro efficacy of extracorporeal photopheresis |
title | A standardized methodical approach to characterize the influence of key parameters on the in vitro efficacy of extracorporeal photopheresis |
title_full | A standardized methodical approach to characterize the influence of key parameters on the in vitro efficacy of extracorporeal photopheresis |
title_fullStr | A standardized methodical approach to characterize the influence of key parameters on the in vitro efficacy of extracorporeal photopheresis |
title_full_unstemmed | A standardized methodical approach to characterize the influence of key parameters on the in vitro efficacy of extracorporeal photopheresis |
title_short | A standardized methodical approach to characterize the influence of key parameters on the in vitro efficacy of extracorporeal photopheresis |
title_sort | standardized methodical approach to characterize the influence of key parameters on the in vitro efficacy of extracorporeal photopheresis |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6396964/ https://www.ncbi.nlm.nih.gov/pubmed/30822323 http://dx.doi.org/10.1371/journal.pone.0212835 |
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