Optimization of the immunomagnetic selection in microcythemic donors enrolled for haploidentical transplantation.

Abstract

BACKGROUND:

Immunomagnetic cell selection (ICS) cells is increasingly used in allogeneic hematopoietic transplantation in order to reduce the T cells quantity. The aim of this study was to evaluate an protocol based on Ficoll method before ICS.

STUDY DESIGN AND METHODS:

The automated procedure was compared with the standard method. In the group 1 the cell processing involves the extraction of the buffy-coat by Ficoll before incubation with antibodies. This procedure was performed with the Sepax S-100 device. The efficacy of this automated procedure was compared with the group 2. In this group, the cell washing and the incubation were performed through the standard method. The CD34+ cells collected by apheresis (HPC-A) were selected with ICS.

RESULTS:

The results obtained after Ficoll procedure, showed a total nucleated cells (TNCs) and CD34+ cells recovery of 85.73% (75.90-90.63; SD 4.25) and 79.31% (51.77-112.31; SD 18.40), respectively. The TNC and CD34+ cells recovery after the pre-incubation washing performed through the standard method, was 75.54% (38.36-97.76; SD 22.5) and 61.51% (30.87-81.79; SD 19.3), respectively. The CD34+ cells recovery after ICS was 79% (51.77-100; SD 18.40) and 44% (15.57-88.24; SD 25.91) in the group 1 and the group 2, respectively. This difference was statistically significant (p=0.001).

CONCLUSION:

The efficacy of the ICS which resulted to be higher in the group 1 compared to the group 2. Overall, our data suggest that the Ficoll procedure before incubation is suitable for the clinical routine in the ICS for haploidentical transplantation in patients affected by thalassemia.

• Authors: Maria Cristina Scerpa, Nicola Daniele, Cecilia Rossi, Chiara Ciammetti, Pietro Sodani, Alessandro Lanti, Gaspare Adorno, Guido Lucarelli, Giancarlo Isacchi, Francesco Zinno
• Journal: Transfusion and apheresis science : official journal of the World Apheresis Association : official journal of the European Society for Haemapheresis (Transfus Apher Sci) Vol. 48 Issue 2 Pg. 263-9 (Apr 2013) ISSN: 1473-0502 [Print] England
• PMID: 23433824 (Publication Type: Comparative Study, Journal Article)
• Copyright: Copyright © 2013 Elsevier Ltd. All rights reserved.

Chemical References

• Antigens, CD34

Topics

• Adolescent
• Adult
• Anemia (blood, pathology, therapy)
• Antigens, CD34 (blood)
• Female
• Hematopoietic Stem Cell Transplantation
• Humans
• Immunomagnetic Separation (instrumentation, methods)
• Leukapheresis (instrumentation, methods)
• Leukocytes (metabolism, pathology)
• Male
• Middle Aged
• Transplantation, Homologous