Proust B.,Etablissement Francais du Sang Center Atlantique |
Masson D.,Laboratoire dhistocompatibilite |
Giraud C.,Etablissement Francais du Sang Center Atlantique |
Bouille C.,Etablissement Francais du Sang Center Atlantique |
And 3 more authors.
Tissue Antigens | Year: 2015
The novel HLA-B*53:39 allele differs from HLA-B*53:01 by a single nucleotide substitution at codon 45 (ACG>AAG). © 2015 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.
Roubinet F.,Etablissement Francais du Sang Center Atlantique
Hematologie | Year: 2010
The national organization of blood delivery allows to dispose of blood products necessary to patients everywhere in France. The delivery based on the respect of the immuno-hematological characteristics of the patients and their compatibilities with the blood products allows to assign a product to a patient. The delivery rules to apply for preventing any major transfusion related accident are simple and very precise.
Ponte A.L.,University of Tours |
Ribeiro-Fleury T.,University of Tours |
Chabot V.,University of Tours |
Chabot V.,Etablissement Francais du Sang Center Atlantique |
And 8 more authors.
Stem Cells and Development | Year: 2012
Human hematopoietic stem/progenitor cells (HSPCs) can be mobilized into the circulation using granulocyte-colony stimulating factor (G-CSF), for graft collection in view of hematopoietic transplantation. This process has been related to bone marrow (BM) release of serine proteases and of the matrix metalloproteinase-9 (MMP-9). Yet, the role of these mediators in HSC egress from their niches remains questionable, because they are produced by nonstromal cells (mainly neutrophils and monocytes/macrophages) that are not a part of the niche. We show here that the G-CSF receptor (G-CSFR) is expressed by human BM mesenchymal stromal/stem cells (MSCs), and that G-CSF prestimulation of MSCs enhances the in vitro trans-stromal migration of CD34+ cells. Zymography analysis indicates that pro-MMP-2 (but not pro-MMP-9) is expressed in MSCs, and that G-CSF treatment increases its expression and induces its activation at the cell membrane. We further demonstrate that G-CSF-stimulated migration depends on G-CSFR expression and is mediated by a mechanism that involves MMPs. These results suggest a molecular model whereby G-CSF infusion may drive, by the direct action on MSCs, HSPC egress from BM niches via synthesis and activation of MMPs. In this model, MMP-2 instead of MMP-9 is implicated, which constitutes a major difference with mouse mobilization models. © Copyright 2012, Mary Ann Liebert, Inc. 2012.
Deschaseaux F.,Etablissement Francais du Sang Center Atlantique |
Deschaseaux F.,University of Tours |
Pontikoglou C.,Etablissement Francais du Sang Center Atlantique |
Pontikoglou C.,University of Tours |
And 2 more authors.
Journal of Cellular and Molecular Medicine | Year: 2010
After bone injuries, several molecular mechanisms establish bone repair from stem/progenitor cells. Inflammation factors attract regenerative cells which expand and differentiate in order to build up a bone highly similar to that before injury. Bone marrow (BM) mesenchymal stem cells (MSCs) as skeletal stem cells and endothelial progenitors (EPCs) are at the origin of such reparation mechanisms. However, discrepancies exist about their identities. Although cultured MSCs are extensively described, their in vivo native forms are poorly known. In addition, recent experiments show that several types of EPC exist. We therefore review up-to-date data on the characterization of such stem/progenitor cells and propose a new point of view of their function in bone regeneration. © 2009 The Authors Journal compilation © 2010 Foundation for Cellular and Molecular Medicine/Blackwell Publishing Ltd.
Daurat G.,Agence regionale de sante du Languedoc Roussillon |
Py J.-Y.,Etablissement francais du sang Center Atlantique
Transfusion Clinique et Biologique | Year: 2012
In France, most blood products are delivered by the établissement francais du sang, directly to the recipients, and hospital blood banks deliver a minor part, but are independent from it. However that may be, hospital blood banks are hazardous activities regarding to recipients, blood products, blood supply of the hospital and regional blood supply. Because of the high risk level, a computerized information system is compulsory for all hospital blood banks, except for those only devoted to vital emergency transfusion. On the field, the integration of computerization in the different processes is very heterogeneous. So, it has been decided to publish guidelines for computerizing hospital blood banks information systems and production management. They have been built according to risk assessment and are intended to minimize those risks. The principle is that all acquisition and processing of data about recipients or blood products and tracking, must be fully computerized and that the result of all manual processes must be checked by computer before proceeding to the next step. The guidelines list the different processes and, for each of them, the functions the software must play. All together, they form the basic level all hospital blood banks should reach. Optional functions are listed. Moreover, the guidelines are also aimed to be a common tool for regional health authorities who supervise hospital blood banks. © 2012 Elsevier Masson SAS.
Sensebe L.,Etablissement Francais du Sang Center Atlantique |
Bourin P.,Etablissement Francais du Sang Pyrenees Mediterranee |
Tarte K.,French Institute of Health and Medical Research
Human Gene Therapy | Year: 2011
Because of their multi/pluripotency and immunosuppressive properties mesenchymal stem/stromal cells (MSCs) are important tools for treating immune disorders and for tissue repair. The increasing use of MSCs has led to production processes that need to be in accordance with Good Manufacturing Practice (GMP). In cellular therapy, safety remains one of the main concerns and refers to donor validation, choice of starting material, processes, and the controls used, not only at the batch release level but also during the development of processes. The culture processes should be reproducible, robust, and efficient. Moreover, they should be adapted to closed systems that are easy to use. Implementing controls during the manufacturing of clinical-grade MSCs is essential. The controls should ensure microbiological safety but also avoid potential side effects linked to genomic instability driving transformation and senescence or decrease of cell functions (immunoregulation, differentiation potential). In this rapidly evolving field, a new approach to controls is needed. © 2011 Mary Ann Liebert, Inc.
PubMed | Etablissement Francais du Sang Center Atlantique
Type: Journal Article | Journal: Tissue antigens | Year: 2015
The novel HLA-B*53:39 allele differs from HLA-B*53:01 by a single nucleotide substitution at codon 45 (ACG>AAG).
PubMed | Etablissement Francais du Sang Center Atlantique, University of Tours and French Institute of Health and Medical Research
Type: | Journal: Journal of translational medicine | Year: 2016
An efficient strategy for programming dendritic cells (DCs) for cancer immunotherapy is the optimization of their maturation so that they can efficiently stimulate cancer-specific T cell responses. Interleukin (IL)-4 has appeared as an essential cytokine, widely used in vitro with granulocyte macrophage-colony stimulating factor (GM-CSF) to differentiate monocytes into immature DCs (iDC) and to prevent macrophage formation. Conflicting data have been published regarding the effect of IL-4 on functional DC maturation. To further understand IL-4s effects on DC maturation and function in vitro, we choose the most commonly used maturation factor tumor necrosis factor (TNF)-.Human monocyte-derived iDC were treated for 48 h with GM-CSF and TNF- in the presence (IL-4(+)-DC) or absence (IL-4(-)-DC) of IL-4 and functions of both DC populations were compared.On mixed lymphocyte reaction assay, IL-4(+)-DC were less potent than IL-4(-)-DC at inducing the proliferation of allogeneic CD4(+) T cells and the proportion of activated T cells expressing CD69 and/or CD25 was smaller. Interleukin-4 reduced the cell-surface expression of TNF--induced DC maturation markers CD83, CD86, HLA-DR and CD25 and generated a heterogeneous population of DCs. IL-4(+)-DC secreted less IL-12 and more IL-10 than IL-4(-)-DC following activation by soluble CD40L, and IL-4(+)-DC-activated T cells secreted lesser amounts of T helper (Th) 1 cytokines (IL-2 and interferon-). Importantly, IL-4 impaired the in vitro migratory capacity of DCs in response to CCL21 and CCL19 chemokines. This effect was related to reduced expression of CCR7 at both mRNA and protein levels.Interleukin-4 used with GM-CSF and TNF- during the maturation of DCs in vitro impaired DC functions and disturbed the maturation effect of TNF-. Finally, our study reinforces the view that the quality of the DC maturation stimulus, which regulates DC migration and cytokine production, may be a decisive feature of the immunogenicity of DCs.
PubMed | Etablissement Francais du Sang Center Atlantique and Laboratoire dhistocompatibilite
Type: Journal Article | Journal: HLA | Year: 2016
The novel HLA-B*08:163 allele differs from HLA-B*08:01:01:01 by a single nucleotide substitution at codon 105.
PubMed | Etablissement francais du sang Center Atlantique, British Petroleum, University of Monastir, Sanguine and Hopital dinstruction des armees
Type: Journal Article | Journal: Transfusion clinique et biologique : journal de la Societe francaise de transfusion sanguine | Year: 2015
Hematologic diseases are a significant part of health disorders in Benin. As an example, anemia is the second cause of hospitalization, measuring up to 7.9% all over the country (National Plan of Sanitary Development, 2009-2018). By contrast, there is only one active hematologist in the country. Thanks to two partnerships, on one hand between the health sciences faculty in Cotonou (Benin) and the medicine one in Tours (France), and on the other hand between the Beninese Blood Transfusion National Agency and the French Blood Establishment, a first blood transfusion and hematology formation was held in Cotonou on December 2014. Among other benefits, was created an hematology-transfusion network in order to facilitate relations between Beninese hospital doctors, with the support of the two French partner institutions. The article describes this progress.