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Garrigue D, Godier A, Glacet A, Labreuche J, Kipnis E, Paris C, Duhamel A, Resch E, Bauters A, Machuron F, Renom P, Goldstein P, Tavernier B, Sailliol A, Susen S. French lyophilized plasma versus fresh frozen plasma for the initial management of trauma-induced coagulopathy: a randomized open-label trial. J Thromb Haemost 2018; 16:481-489. [PMID: 29274254 DOI: 10.1111/jth.13929] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Indexed: 01/08/2023]
Abstract
Essentials An immediate supply of plasma in case of trauma-induced coagulopathy is required. The Traucc trial compared French Lyophilised Plasma (FLyP) and Fresh Frozen Plasma (FFP). FLyP achieved higher fibrinogen concentrations compared with FFP. FLyP led to a more rapid coagulopathy improvement than FFP. SUMMARY Background Guidelines recommend beginning hemostatic resuscitation immediately in trauma patients. We aimed to investigate if French lyophilized plasma (FLyP) was more effective than fresh frozen plasma (FFP) for the initial management of trauma-induced coagulopathy. Methods In an open-label, phase 3, randomized trial (NCT02750150), we enrolled adult trauma patients requiring an emergency pack of 4 plasma units within 6 h of injury. We randomly assigned patients to receive 4-FLyP units or 4-FFP units. The primary endpoint was fibrinogen concentration at 45 min after randomization. Secondary outcomes included time to transfusion, changes in hemostatic parameters at different time-points, blood product requirements and 30-day in-hospital mortality. Results Forty-eight patients were randomized (FLyP, n = 24; FFP, n = 24). FLyP reduced the time from randomization to transfusion of first plasma unit compared with FFP (median[IQR],14[5-30] vs. 77[64-90] min). FLyP achieved a higher fibrinogen concentration 45 min after randomization compared with FFP (baseline-adjusted mean difference, 0.29 g L-1 ; 95% confidence interval [CI], 0.08-0.49) and a greater improvement in prothrombin time ratio, factor V and factor II. The between-group differences in coagulation parameters remained significant at 6 h. FLyP reduced fibrinogen concentrate requirements. Thirty-day in-hospital mortality rate was 22% with FLyP and 29% with FFP. Conclusion FLyP led to a more rapid, pronounced and extended increase in fibrinogen concentrations and coagulopathy improvement compared with FFP in the initial management of trauma patients. FLyP represents an attractive option for trauma management, especially when facing logistical issues such as combat casualties or mass casualties related to terror attacks or disasters.
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Affiliation(s)
- D Garrigue
- CHU de Lille, Pôle d'Anesthésie-Réanimation, Lille, France
- CHU Lille, Pôle de l'Urgence, Lille, France
| | - A Godier
- Service d'Anesthésie-Réanimation, Fondation Ophtalmologique Adolphe de Rothschild, Paris, France
- NSERM, UMR-S1140, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - A Glacet
- CHU de Lille, Pôle d'Anesthésie-Réanimation, Lille, France
- CHU Lille, Pôle de l'Urgence, Lille, France
| | - J Labreuche
- Université Lille, CHU Lille, EA 2694 - Santé Publique: Épidémiologie et Qualité des Soins, Lille, France
| | - E Kipnis
- CHU de Lille, Pôle d'Anesthésie-Réanimation, Lille, France
- Université Lille, EA 7366, Lille, France
| | - C Paris
- CHU de Lille, Institut d'Hématologie-Transfusion, Lille, France
| | - A Duhamel
- Université Lille, CHU Lille, EA 2694 - Santé Publique: Épidémiologie et Qualité des Soins, Lille, France
| | - E Resch
- EFS Hauts de France, Lille, France
| | - A Bauters
- CHU de Lille, Institut d'Hématologie-Transfusion, Lille, France
| | - F Machuron
- Université Lille, CHU Lille, EA 2694 - Santé Publique: Épidémiologie et Qualité des Soins, Lille, France
| | - P Renom
- CHU de Lille, Institut d'Hématologie-Transfusion, Lille, France
| | - P Goldstein
- CHU de Lille, Pôle d'Anesthésie-Réanimation, Lille, France
- CHU Lille, Pôle de l'Urgence, Lille, France
| | - B Tavernier
- CHU de Lille, Pôle d'Anesthésie-Réanimation, Lille, France
| | - A Sailliol
- Centre de Transfusion Sanguine des Armées, Clamart, France
| | - S Susen
- CHU de Lille, Institut d'Hématologie-Transfusion, Lille, France
- Université Lille, Inserm, CHU Lille, U1011 - EGID, Lille, France
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Subit D, Glacet A, Hamzah M, Crandall J. Orientation of the intercostal muscle fibers in the human rib cage. Comput Methods Biomech Biomed Engin 2015; 18 Suppl 1:2064-5. [DOI: 10.1080/10255842.2015.1069624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- D. Subit
- Center for Applied Biomechanics, University of Virginia, Charlottesville, VA, USA
- Arts et Metiers ParisTech, LBM/Institut de Biomecanique Humaine Georges Charpak, Paris, France
| | - A. Glacet
- Center for Applied Biomechanics, University of Virginia, Charlottesville, VA, USA
| | - M. Hamzah
- Center for Applied Biomechanics, University of Virginia, Charlottesville, VA, USA
| | - J. Crandall
- Center for Applied Biomechanics, University of Virginia, Charlottesville, VA, USA
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Martinet V, Guigui B, Glacet A, Zourdani A, Giorgi F, Kuhn D, Coscas G, Soubrane G. 306 Description et évolution de l’œdème maculaire des occlusions veineuses rétiniennes : aspects clinique, tomographique (OCT) et angiographique. J Fr Ophtalmol 2008. [DOI: 10.1016/s0181-5512(08)70903-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kempf E, Weiss E, Klein P, Glacet A, Spratt S, Bourel D, Orfanoudakis G. The rescue by phage display of human Fabs to gp120 HIV-1 glycoprotein using EBV transformed lymphocytes. Mol Biotechnol 2001; 17:97-108. [PMID: 11395866 DOI: 10.1385/mb:17:2:097] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Human hybridomas secreting monoclonal antibodies in a stable manner are difficult to develop. The main difficulties are the restricted techniques for B-cell immortalization, the low number of sensitized B cells in peripheral blood, and the impossibility, for ethical reasons, to immunize humans with most antigens. Phage display has proved to be a powerful method for the generation of recombinant antibody fragments. This technology relies on the construction of recombinant Fab or scFv libraries and their display on phage M13. In order to rescue unstable B-cell clones secreting human antibodies we set up a method for the selection by phage display of human IgG fragments from Epstein-Barr virus (EBV)-transformed clones and applied it to the selection by phage display of Fabs directed against HIV-1 gp120, using a seropositive blood sample. The approach combines B-cell transformation by EBV of peripheral blood lymphocytes from a seropositive donor, preselection of specific IgG anti-gp120 producing clones, and the construction of a targeted human antibody library. In this library the percentage of heavy and light chain coding sequences expressed in Escherichia coli, amplified by a set of specific 5' primers for different antibody germ lines, was similar to that observed with the original untransformed B-cell sample. One round of panning was sufficient for the rescue of three Fabs specific for HIV-1 gp120 protein, which proves the efficiency of this technique.
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Affiliation(s)
- E Kempf
- Laboratoire d'immunotechnologie et microbiologie moléculaires, UPRES 1329, Ecole Supérieure de Biotechnologie de Strasbourg, Boulevard Sébastien Brant, 67400 Illkirch, France
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Cointe D, Béliard R, Jorieux S, Leroy Y, Glacet A, Verbert A, Bourel D, Chirat F. Unusual N-glycosylation of a recombinant human erythropoietin expressed in a human lymphoblastoid cell line does not alter its biological properties. Glycobiology 2000; 10:511-9. [PMID: 10764840 DOI: 10.1093/glycob/10.5.511] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Erythropoietin (Epo) is a 166 amino acids protein containing three N-glycosylation sites (Asn-24, Asn-38, and Asn-83) and 1 O- glycosylation site (Ser-126) and involved in the regulation of the level of red blood cells. Today, only one recombinant human Epo (rHuEpo), produced in CHO cell line, is extensively used in therapy to cure severe anemia. The structure of the glycan chains of this rHuEpo slightly differ of those of the urinary human Epo (uHuEpo), considered as the natural Epo molecule. In an attempt to produce a rHuEpo as close as possible to the uHuEpo, Epo gene was expressed in a human lymphoblastoid cell line, named RPMI 1788. In order to fully characterize the Epo-RPMI, structural characterizations of the protein skeleton as well as glycan chains were undergone. As expected, the amino acid sequence of the Epo-RPMI conformed to that of uHuEpo. Surprisingly, the structure of some N-glycan chains, as mainly determined by ESI-MS, revealed some unusual characteristics. Thus, 80% of N-glycans possess a bisecting GlcNAc residue, 25% bear a second fucose residue which is present, in a large part, in a sialyl Le(x)motif, and 13% contain more than three LacNAc repeats (up to five per molecule). Despite these unusual structural characteristics, the data concerning the in vitro and in vivo biological activities were not impaired when compared to Epo-CHO and uHuEpo.
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Affiliation(s)
- D Cointe
- Laboratoire de Glycobiologie Structurale et Fonctionnelle, Unité Mixte de Recherche du CNRS No 8576, Université des Sciences et Technologies de Lille, F-59655 Villeneuve d'Ascq, France
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Sibler AP, Kempf E, Glacet A, Orfanoudakis G, Bourel D, Weiss E. In vivo biotinylated recombinant antibodies: high efficiency of labelling and application to the cloning of active anti-human IgG1 Fab fragments. J Immunol Methods 1999; 224:129-40. [PMID: 10357213 DOI: 10.1016/s0022-1759(99)00016-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
In vivo biotinylation of antibody fragments with a gene fusion approach is a realistic alternative to conventional in vitro chemical labelling. We have previously reported the construction of a vector system suitable for the bacterial expression of the binding fragment of antibody (Fab) genetically linked to the C-terminal domain of Escherichia Coli biotin carboxy carrier protein (BCCP*). A minor fraction of the expressed hybrids was biotinylated in vivo and therefore able to interact with streptavidin. We now show that the large majority of bacterially-expressed Fab-BCCP* fusions are labelled with biotin when plasmid-encoded biotin holoenzyme synthetase (BirA) is co-expressed. The yield of biotinylated Fab is maximal when overexpression of BirA is driven by a second compatible plasmid. We took advantage of this property to develop a novel filter assay for the rapid identification of recombinant Fab reacting with immunoglobulin. Starting with total RNA of two newly established murine hybridoma cell lines producing anti-human IgG1 antibodies, we selected in a single experiment the bacterial clones that expressed in vivo biotinylated anti-IgG1 Fab. Sequence analysis of the isolated Fabs showed that they did not derive from a single B clone. In addition, we found that these recombinant Fabs labelled with biotin in vivo are useful for the specific detection of human IgG1 by a solid-phase immunoassay.
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Affiliation(s)
- A P Sibler
- Laboratoire d'immunotechnologie et de microbiologie moléculaires, UPRES 1329, Ecole Supérieure de Biotechnologie de Strasbourg, Illkirch, France
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Klein P, Béliard R, Glacet A, Moitel S, Ducrot T, Bourel D. Human recombinant anti-Rh(D) monoclonal antibodies: improvement of biological properties by in vitro class-switch. Hum Antibodies 1997; 8:17-25. [PMID: 9265501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Therapeutic use of human monoclonal antibodies has so far been hampered by their poor availability. Recent developments in recombinant DNA technologies are expected to fill this gap; the variable and constant sequences of antibodies can be selected independently and then subsequently joined to express whole antibodies. We assessed here the potential of this methodology to obtain novel anti-D antibodies with improved biological characteristics. The sequences coding for heavy and light chains of two anti-Rh(D) monoclonal antibodies (one IgG1 and one IgG3) were isolated and co-expressed into murine myeloma cell P3X63.Ag8.653, either directly (parental antibodies) or after exchange of constant heavy chain sequences (class-switched antibodies). Parental antibodies produced either by transfectomas or by hybridomas behaved similarly in analysis of biochemical, binding and effector properties. Class-switched antibodies displayed altered functional properties over parental antibodies. Of particular interest, one of them showed improved phagocytosis potencies over both parental antibodies. Additionally, these results indicate that functional properties do not always simply reflect the addition of properties of constant and variable parts but that interactions between constant and variable regions may interfere.
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Affiliation(s)
- P Klein
- Labaratoire d'Ingénierie Cellulaire et Moléculaire, Lille, France
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Ducrot T, Beliard R, Glacet A, Klein P, Harbonnier S, Benmostefa N, Bourel D. Use of the DAF assay to assess the functional properties of polyclonal and monoclonal RhD antibodies. Vox Sang 1996; 71:30-6. [PMID: 8837354 DOI: 10.1046/j.1423-0410.1996.7110030.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The mechanism whereby passive Rh (D) immunoglobulins suppress the fetomaternal alloimmunization is still unclear. New in vitro tests are needed to better characterize the functional properties of polyclonal anti-Ds. The DAF assay was developed to monitor the antibody-dependent cell-mediated cytotoxicity (ADCC) and the phagocytosis of anti-Rh (D)-sensitized RBCs by effector cells. The principle of this test is based on the oxydization of the 2,7-diaminofluorene (DAF) by the pseudoperoxidase activity of free hemoglobin. The reaction is proportional to the hemoglobin concentration. This test was performed to determine and emphasize the efficacy of different polyclonal anti-D immunoglobulin preparations to mediate lysis and phagocytosis of sensitized RBCs by human peripheral mononuclear cells. The functional properties of different human RhD monoclonal antibodies were also analyzed and compared. The test was found to be convenient to perform and allowed the avoidance of radioactive labelling of RBCs for ADCC studies. It is mainly useful for the direct quantitation of phagocytosis.
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Affiliation(s)
- T Ducrot
- Laboratoire d'Ingénierie Cellulaire et Moléculaire, Lille, France
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Ducrot T, Beliard R, Glacet A, Klein P, Harbonnier S, Benmostefa N, Bourel D. Use of the DAF Assay to Assess the
Functional Properties of Polyclonal
and Monoclonal Rh D Antibodies. Vox Sang 1996. [DOI: 10.1159/000462017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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10
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Affiliation(s)
- A Glacet
- Laboratoire Français du Fractionnement et des Biotechnologies, Lille, France
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Sterkers M, Coscas G, Soubrane G, Glacet A. [Dye lasers: experimental histopathologic study of the effects of various wavelengths on the macular region]. Bull Soc Ophtalmol Fr 1990; 90:159-63. [PMID: 2357749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Pathological experimental study of dye laser photocoagulation simulating the confluent treatment of subretinal new vessels in the macular area of a Macacas Cynomolgus monkey. 38 days after treatment the lesions become similar on the choriocapillaris and retinal pigment epithelium whatever the wavelength; the choriocapillaris is always occluded and the pigment epithelium destroyed. The internal limiting membrane is ondulated only with yellow and orange colors. These results are compared to those of similar experimental studies.
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Affiliation(s)
- M Sterkers
- Clinique Ophtalmologique Universitaire de Créteil-Université de Paris, France
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Gaudric A, Glacet A, Crama F, Coscas G. [Intraocular photocoagulation using the argon laser]. Bull Soc Ophtalmol Fr 1987; 87:1083-4. [PMID: 3449281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Glacet A, Letourneau F, Leveque P, Villa P. Kinetic study of nitrite inhibition during alcoholic fermentation of beet molasses. Biotechnol Lett 1985. [DOI: 10.1007/bf01032419] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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