429 results on '"B. Genetet"'
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2. Joint Report of the B Lymphocyte Specificities Workshop of the France-one Region by FRANCE-ONE with the collaboration of
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J. Vives, G. Ercilla Barcelona, J.M. Turc, C Boisnard Dijon, M. Jeannet Geneva, J. Goudemand Lille, H. Betuel, L. Gebuhrer, J. Bertrand Lyon, C Raffoux, F. Streiff Nancy, L. Legrand, V. Lepage, M. Pierres Paris, B. Genetet, R. Fauchet, N. Genetet Rennes, S. Mayer, M.M. Tongio, J. Goudemand Strasbourg, A. Mouzon, E. Ohayon Toulouse, A. Kastelan Zagreb, M. Pierres, and J. Dausset
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Genetics ,biology ,Lymphocyte ,Immunology ,Locus (genetics) ,General Medicine ,Human leukocyte antigen ,Major histocompatibility complex ,Biochemistry ,medicine.anatomical_structure ,medicine ,biology.protein ,Immunology and Allergy - Abstract
The analysis of 182 selected anti-B cell sera on 102 cells allowed us to identifysseveral clusters of sera. They showed no correlation with HLA-A, B or C specificities but many associations with the HLA-D determinants. In 10 families, most of these sera segregated with HLA, and five recombinants showed a linkage with the BD or D end part of the MHC. The panel distribution and the family analysis indicated that at least one (the Ly-Li system) and probably two segregant series could exist close to the HLA-D locus.
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- 2008
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3. Blood Groups and Plasma Substitutes (Dextran and Plasmagel)
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B. Genetet, A. Peters, A Larcan, and F. Streiff
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chemistry.chemical_compound ,Dextran ,Chromatography ,chemistry ,Plasma Substitutes - Published
- 2015
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4. Ex vivo studies of polymorphonuclear neutrophils from patients with early-onset periodontitis
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B. Genetet, N. Genetet, J. Apiou, J. F. Michel, P. Mouynet, P. Nicolas, and C Picot
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Adult ,Periodontium ,Neutrophils ,Fluorescent Antibody Technique ,Macrophage-1 Antigen ,CD18 ,CD11a ,Flow cytometry ,Gingivitis ,medicine ,Humans ,Periodontitis ,medicine.diagnostic_test ,biology ,business.industry ,hemic and immune systems ,Gingival Crevicular Fluid ,Flow Cytometry ,medicine.disease ,Lymphocyte Function-Associated Antigen-1 ,Aggressive Periodontitis ,Gene Expression Regulation ,Integrin alpha M ,CD18 Antigens ,Immunology ,biology.protein ,Periodontics ,medicine.symptom ,business ,Ex vivo - Abstract
In this study, we assessed the LFA-1 (CD18/CD11a) and CR3 (CD18/CD11b) expression on peripheral polymorphonuclear leukocytes (PB-PMN) and crevicular fluid polymorphonuclear leukocytes (CF-PMN), by subjects with a healthy periodontium (n=1), gingivitis (n=8). early-onset periodontitis (n=17) and adult periodontitis (n=8). Using flow cytometry analysis, the %s of CD18, CD11a and CD11b positive cells and the absolute numbers of fluorescent molecules were determined. No significant difference could be found among the 4 groups, for these 2 kinds of parameters, in PB-PMN or CF-PMN. However, a great difference could be noted between the results obtained from PB-PMN and those obtained from CF-PMN. The %s of positive CF-PMN were significantly lower than those of PB-PMN for the 3 sub-units (p < 0.001). The levels of CD18 and CD11b expressed by CF-PMN were higher than those expressed by PB-PMN and the difference was significant for CD11b (p < 0.001). On the contrary, the level of CD11a expressed on CF-PMN was significantly lower than that expressed by PB-PMN (p < 0.001). Hence, our current results show that early-onset periodontitis PMN can be quite normal and this fact is not surprising insofar as, in our study, these cells were perfectly functional and all the subjects were in good health. We concluded that the analysis of the leukocyte adhesion receptors expression on PB-PMN does not appear useful for helping to establish a differential diagnosis between the different forms of periodontitis. However, the pattern of expression study on CF-PMN may permit a better comprehension of the local phenomena which are implicated in the defence of the periodontal tissues against oral microorganisms.
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- 2005
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5. Implication of HLA-DMA Alleles in Corsican IDDM
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B. Genetet, J.-P. Amoros, Licinio Contu, P. Sorba, D. Haras, Carlo Carcassi, Sara Lai, P. Cucchi-Mouillot, and M. Stuart-Simoni
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Adult ,Genetic Markers ,Male ,Linkage disequilibrium ,Adolescent ,Clinical Biochemistry ,Population ,Corsica ,Human leukocyte antigen ,Biology ,Linkage Disequilibrium ,Gene Frequency ,Antigen ,Genetics ,medicine ,Humans ,Allele ,education ,Molecular Biology ,Allele frequency ,Alleles ,Aged ,Autoimmune disease ,HLA-D Antigens ,lcsh:R5-920 ,education.field_of_study ,Polymorphism, Genetic ,diabetes ,Biochemistry (medical) ,Histocompatibility Antigens Class II ,HLA-DR Antigens ,General Medicine ,Middle Aged ,medicine.disease ,Diabetes Mellitus, Type 1 ,HLA-DMA ,Immunology ,Female ,France ,Other ,Gene polymorphism ,lcsh:Medicine (General) ,HLA-DRB1 Chains - Abstract
The HLA-DM molecule catalyses the CLIP/antigen peptide exchange in the classical class II peptide-binding groove. As such, DM is an antigen presentation regulator and may be linked to autoimmune diseases. Using PCR derived methods, a relationship was revealed between DM gene polymorphism and IDDM, in a Corsican population. The DMA*0101 allele was observed to confer a significant predisposition to this autoimmune disease while the DMA*0102 allele protected significantly. Experiments examining polymorphism of the HLA-DRB1 gene established that these relationships are not a consequence of linkage disequilibrium with HLA-DRB1 alleles implicated in this pathology. The study of the DMA gene could therefore be an additional tool for early IDDM diagnosis in the Corsican population.
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- 1998
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6. Clinical validity of intercellular adhesion molecule-1 (ICAM-1) and TSH receptor antibodies in sera from patients with Graves' disease
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Jacqueline Gibassier, Catherine Massart, D. Maugendre, E. Sonnet, and B. Genetet
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endocrine system ,medicine.medical_specialty ,endocrine system diseases ,Graves' disease ,Clinical Biochemistry ,Intercellular Adhesion Molecule-1 ,Immunoglobulins ,Thyrotropin ,Biochemistry ,Antibodies ,Immune system ,Internal medicine ,medicine ,Humans ,Receptor ,ICAM-1 ,biology ,business.industry ,Biochemistry (medical) ,Reproducibility of Results ,Receptors, Thyrotropin ,General Medicine ,Prognosis ,medicine.disease ,Graves Disease ,Endocrinology ,Carbimazole ,Clinical validity ,biology.protein ,Antibody ,business ,medicine.drug - Abstract
We compared the concentrations of soluble intercellular adhesion molecule-1 (sICAM-1) and the activities of thyroid-stimulating antibodies (TSAb) and thyrotropin-receptor antibodies (TBIAb) as measured with a commercial kit (TRAK). Sera were obtained from patients with Graves' disease (GD) before, during and after therapy with carbimazole (1-methyl-2-thio-3-carbethoxyimidazole). In all the situations, TSAb method was more sensitive than TBIAb. These two parameters dropped during therapy and were not correlated at any stage of measurement. sICAM-1 levels increased in 56.4% of patients before treatment, remained elevated at the beginning of treatment and decreased after twelve months of therapy. TSAb levels were significantly different between patients in relapse (78%) and those in remission (18%) (Z=−2.250, P = 0.025), with a relapse rate depending on the TSAb positivity (χ2 = 7.103, P = 0.0077). Positive sICAM-1 values were found in 3 of the 9 (33.3%) patients who relapsed after discontinuing the drug but were negative in all the patients remaining in remission with a significant difference (Z = −1.982, P = 0.0475). The relapse rate was also dependent on positive sICAM-1 values (χ2 = 3.958, P = 0.0466). No correlation was found between sICAM-1 levels and anti-TSH receptor antibodies TSAb or TBIAb. We conclude that the TBIAb technique is too insensitive to explore GD. TSAb and sICAM-1 assays in patients with GD are good markers of immune process after treatment withdrawal. Because of its rapid implementation, the sICAM-1 assay may advantageously replace TSAb measurement for forming a prognosis of GD.
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- 1997
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7. Thyroid cell survival in coculture with autologous peripheral or intrathyroidal lymphocytes
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N Genetet, C. Massart, C. Lucas, J. Glbassler, M L Raoul, F. Gall, F. Beurtin, and B. Genetet
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Adult ,Cytotoxicity, Immunologic ,Male ,medicine.medical_specialty ,Time Factors ,Endocrinology, Diabetes and Metabolism ,Lymphocyte ,Graves' disease ,medicine.medical_treatment ,Thyroid Gland ,Apoptosis ,Lymphocyte Activation ,Interferon-gamma ,Endocrinology ,Internal medicine ,medicine ,Humans ,Cytotoxic T cell ,Interferon gamma ,MTT assay ,Cytotoxicity ,Cells, Cultured ,L-Lactate Dehydrogenase ,Tumor Necrosis Factor-alpha ,business.industry ,T lymphocyte ,Middle Aged ,medicine.disease ,Glutathione ,Graves Disease ,medicine.anatomical_structure ,Cytokine ,Female ,business ,T-Lymphocytes, Cytotoxic ,medicine.drug - Abstract
Summary OBJECTIVE We have studied lymphocyte Induced cytotoxicity and the production of interferon gamma (IFN-α) and tumour necrosis factor alpha (TNF-α) during coculture of thyrocytes and autologous lymphocytes from patients with Graves' disease and from normal subjects. PATIENTS Thyroid tissues and lymphocytes were obtained from 28 patients with Graves' disease and from 9 control subjects. MEASUREMENTS Lymphocyte induced cytotoxicity was evaluated on autologous thyrocytes using 5 metabolic tests: the MTT assay, the neutral red uptake, lactate dehydrogenase measurement and glutathione assay. IFN-γ and TNF-α measurements were performed after 1, 5 or 7 days' coculture. RESULTS The lymphocytes Isolated from peripheral blood (PB lymphocytes) altered the morphology and the metabolism of autologous thyrocytes. The Intrathyroidal lymphocytes Isolated after Dispase digestion were not toxic whereas mechanically Isolated lymphocytes exerted a little toxicity. No difference was seen between Graves' disease and normal cells.The supernatants from cocultures had higher IFN-γ levels than those from lymphocyte cultures, in coculture, PB lymphocytes secreted more IFN-γ and TNF-α than Intrathyroidal lymphocytes. The PB lymphocyte Induced cytotoxicity was not due to IFN-γ and TNF-α alone. CONCLUSION Peripheral blood lymphocytes are cytotoxic in vitro to autologous thyrocytes whereas Intrathyroidal lymphocytes exert little or no cytotoxicity according to their isolation method. The mechanisms of lymphocyte Induced toxicity remain to be explained.
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- 1995
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8. Mise en place d'un contrôle sur distributeur d'échantillons
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B. Genetet, F. Durand, and B. Annic
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Assurance qualite ,media_common.quotation_subject ,Medical screening ,Biochemistry (medical) ,Clinical Biochemistry ,Hematology ,Art ,Humanities ,media_common - Abstract
Resume L'utilisation en routine dans les laboratoires des E.T.S. d'automates de distribution devrait imposer aux utilisateurs un controle regulier de ce type de materiels. Dans ce but, nous avons travaille sur Microlab et sur IEMS. Nous avons utilise une solution coloree (Rouge d'alizarine en tampon pH9) et nous nous sommes bases sur la loi de Beer-Lambert sachant que toute modification de volume entraine une modification de densite optique. Apres avoir teste la linearite des photometres utilises, nous avons etabli 4 programmes de distribution afin d'approcher les differents types de distribution : de grands volumes d'echantillons, de petits volumes d'echantillons dans un petit volume de tampon, de petits volumes d'echantillons dans un grand volume de tampon, enfin un programme specifique IEMS. Les resultats exprimes sous forme de coefficient de variation obtenu pour chaque volume varient de 9,8 a 0,7 %. Ils montrent que la distribution des grands volumes ne pose pas de probleme particulier (CV
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- 1995
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9. Mise en place d'une validation des lecteurs de microplaques ELISA
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B. Genetet and F. Durand
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Assurance qualite ,Medical screening ,Philosophy ,Biochemistry (medical) ,Clinical Biochemistry ,Hematology ,Elisa assay ,Humanities - Abstract
Resume Le resultat positif ou negatif, obtenu a l'issue des tests ELISA pratiques dans le cadre du depistage des marqueurs viraux chez les donneurs de sang, est necessairement valide apres lecture de microplaques sur photometres. A Rennes, nous avons la possibilite de lire ces microplaques sur photometre MR 7 000 (Dynatech) ou IEMS (Labsystems). Cette etape, etant la derniere dans la sequence technique, conditionne la fiabilite du resultat. Un controle regulier des photometres peut donc renforcer l'assurance qualite de la sequence technique de ces tests. Ce controle a pu etre realise grâce a l'utilisation de la plaque commercialisee par Bio-TEK Instruments USA : « Universal Calibration Test Plate , format microplaque 96 puits. Elle possede 8 puits correspondant a des blancs, 6 autres sont equies de filtres en verre (3 colores et 3 non). Cette plaque est accompagnee d'un tableau indiquant la densite optique en fonction de la longueur d'onde. Dans un premier temps, nous avons realise une etude de repetabilite sur chacun des photometres puis mis en place une etude de precision et de reproductibilite. Cette plaque permet aussi de verifier la linearite de chaque photometre. A la vue de ces resultats, nous pouvons dire que les deux photometres sont precis, les resultats obtenus etant compatibles avec une densite optique ± 0,024 ± 1 % de Do. Ils sont repetables, le coefficient de variation est inferieur a 0,5 %. Enfin, la linearite a ete verifiee (r : 0,999 pour les deux photometres). La lecture de cette plaque ne demande que quelques minutes pour etre realisee et permet la mise en place d'un controle quotidien de ces appareils. Il suffit de reporter les resultats obtenus sur une carte de controle afin de suivre l'apparition de derives eventuelles, une intervention technique pouvant aussitot avoir lieu pour pallier cette derive.
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- 1995
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10. Étude du polymorphisme HLA de classe I dans la population tunisienne
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N. Mojaat, G. Semana, S. Abid, K. Boukef, A. Dridi, S. Hmida, and B. Genetet
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Gynecology ,medicine.medical_specialty ,Biochemistry (medical) ,Clinical Biochemistry ,medicine ,Hematology ,Biology - Abstract
Resume Cette etude explore la distribution des antigenes HLA de classe I dans une population tunisienne de 102 donneurs de sang. Les frequences phenotypiques, geniques, haplotypiques ainsi que les desequilibres de liaison ont ete calcules et compares a d'autres populations. Les alleles HLA-A les plus representes sont A2 (23 %), A30 (12,5 %), A3 (10,2 %), A1 (8,5 %), A23 (7,4 %). Pour le locus HLA-B, les alleles les plus frequents sont B21 (14,3 %), B44 (11,4 %), B35 (9,6 %), B5 (8,5 %). L'haplotype le plus frequemment retrouve est A3 B21 (2,6 %), un desequilibre de liaison positif a ete egalement retrouve pour les associations alleliques suivantes : A11 B35 (X 2 = 6,8), A28 B35 (X 2 = 5,3) et A30 B35 (X 2 = 5). En conclusion, les resultats observes montrent que la population tunisienne presente des caracteristiques HLA specifiques qui pourront etre utilisees dans l'avenir pour l'etude des associations HLA et maladies, et dans l'evaluation de la probabilite de recherche positive d'un donneur de moelle osseuse compatible en situation non apparentee.
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- 1995
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11. Ex vivo studies of polymorphonuclear neutrophils from patients with early-onset-periodontitis (II). Chemiluminescence response analysis
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P. Mouynet, B. Genetet, J. F. Michel, M. Delamaire, M. Yardin, and M. C. Legoff
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Adult ,Periodontium ,Free Radicals ,Neutrophils ,Inflammation ,Stimulation ,law.invention ,chemistry.chemical_compound ,Gingivitis ,law ,medicine ,Humans ,Age of Onset ,Periodontitis ,Cells, Cultured ,Chemiluminescence ,business.industry ,Zymosan ,medicine.disease ,Aggressive Periodontitis ,chemistry ,Luminescent Measurements ,Immunology ,Tetradecanoylphorbol Acetate ,Periodontics ,Luminol ,medicine.symptom ,Reactive Oxygen Species ,business ,Ex vivo - Abstract
Previous studies have indicated that oxygen-free radicals may cause damage to the periodontal tissues. This study compared the luminol-dependant chemiluminescence response (after stimulation with either opsonized zymosan or Phorbol myristate acetate (PMA)) of peripheral blood polymorphonuclear leukocytes (PMN) isolated from human subjects with a healthy periodontium (n=7), gingivitis (n=8), adult periodontitis (n=8), or early-onset periodontitis (n=17). These results were also compared with those obtained in a larger reference group which consists of 50 subjects without infection or inflammation, selected on the basis of laboratory investigations. An enhanced response was defined as being 2 standard deviations above the reference group mean; a reduced response was. defined as being 2 standard deviations below this mean. Although PMN from patients with either gingivitis or periodontitis were often functionally activated (when compared to the PMN from the reference group), no significant differences could be found between the 4 groups, with regard to the chemiluminescence response means obtained in a basal state or after stimulation.
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- 1994
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12. Fourth meeting of the European Neurological Society 25–29 June 1994 Barcelona, Spain
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H. Hattig, C. Delli Pizzi, M. C. Addonizio, Michelle Davis, A. R. Giovagnoli, L. Florensa, M. Roth, J. de Kruijk, Francisco Lacruz, Ph. Dewailly, A. Toygar, C. Avendano, P.P. De Deyn, J. F. Hurtevent, F. Lomeila, T. W. Wong, Gordon T. Plant, M. Bud, H. J. Willison, DH Miller, D. W. Langdon, R. Cioni, J. Servan, A. Kaygisiz, E. Racadot, D. B. Schens, E. Picciola, L. Falip, C. Bouchard, J. Jotova, A. Jorge-Santamaria, P. Misra, A. Dufour, C. P. Panagopoulos, A. Venneri, B. Sredni, B. Angelard, M. Janelidze, M. Carreno, J. Obenberger, J. Pouget, H. W. Moser, R. Kaufmann, J. A. Molina, D. Linden, A. Martin Urda, E. Uvestad, A. Krone, J. P. Cochin, J. Mallecourt, A. Cambon-Thomsen, K. Violleau, P. Osschmann, A. M. Durocher, E. Bussaglia, D. M. Danielle, H. Efendi, C. Van Broeckhoven, K. G. Jordan, W. Rautenberg, C. Iniguez, J. M. Delgado, Graham Watson, M. Lawden, Gareth J. Barker, K. Stiasny, James T. Becker, G. Campanella, E. Peghi, A. Poli, A. Haddad, T. Yamawaki, Giacomo P. Comi, S. Sotgiu, B. Ersmark, A. Pomes, M. Ziegler, P. Ferrante, P. Ruppi, H. KuÇukoglu, R. Bouton, U. K. Rinne, P. Vieregge, M. Dary, P. Giunti, Peter J. Goadsby, S. Jung, E. Secor, A. Steinberg, N. Vila, M. A. Hernandez, M. Cursi, A. Enqelhardt, A. Engelhardt, J. Veitch, F. Di Silverio, F. Arnaud, B. Neundörfer, R. Brucher, Dominique Caparros-Lefebvre, B. Meyer, Marianne Dieterich, M. H. Snidaro, R. Gomez, R. Cerbo, M. Ragno, J. M. Vance, S. Nemni, A. Caliskan, F. Barros, I. Velcheva, D. Ceballos-Baumann, V. Barak, A. Avila, N. Antonova, F. Resche, S. Pappata, L. Varela, S. R. Silveira Santos, A. Cammarota, L. Naccache, Y. Nara, E. Tournier-Lasserves, R. Mobner, T. Chase, A. Ensenyat, J. Ulrich, G. Giegerich, M. Rother, M. Revilla, N. Nitschke, K. Honczarenko, E. Basart Tarrats, J. Blin, B. Jacob, J. Santamaria, S. Knezevic, J. L. Castillo, M. Antem, J. Colomer, O. Busse, Didier Hannequin, S. Carrier, J. B. Ruidavets, C. Rozman, J. Bogoussslavsky, J. Pascual Calvet, E. Monros, J. M. Polo, M. Zucconl, Javier Muruzabal, R. R. Allen, R. Rivolta, K. Haugaard, A. Nespolo, K. Hoang-Xuang, G. Bussone, T. Avramidis, E. Corsini, Christiana Franke, T. Vinogradova, H. Boot, K. Vestergaard, G. H. Jansen, N. Argentino, M. Raltzig, W. Linssen, Mark B. Pepys, P. Roblot, L. Lauritzen, E. Fainardi, D. Morin, T. X. Arbizu Urdiain, J. Wollenhaupt, S. Bostantjopoulou, G. Pavesi, A. D. Forman, Giovanni Fabbrini, D. Jean, J. J. Archelos, M. I. Blanchs, M. Del Gobbo, Anna Carla Turconi, Ch. Derouesné, Elio Scarpini, A. Visbeck, P. Castejon, J. P. Renou, F. Mounier-Vehier, G. Potagas, Ch. Duyckaerts, A. Filla, R. Schneider, G. Ronen, K. Nagata, J. P. Vedel, A. Henneberg, G. van Melle, C. Baratti, H. Knott, M. C. Prevett, A. Bes, B. Metin, Jos V. Reempts, L. Martorell, Mefkure Eraksoy, H. O. Handwerker, D. S. Younger, O. Oktem, D. Frongillo, C. Soriano-Soriano, L. Niehaus, F. Zipp, A. Tartaro, S Newman, R. H. Browne, P. Davous, R. Sanchez, M. Muros, M. E. Kornhuber, A. Lavarone, M. Mohr, M. R. Garcia, S. Russell, H. Kellar-Wood, M. R. Tola, B. Ostermeyer, Ch. Tzekov, K. Sartor, E. B. Ringelstein, P. P. Gazzaniga, Paul Krack, H. Fidaner, H. Rico, T. Dbaiss, F. Alameda, E. Torchiana, L. Rumbach, I. Charques, J. M. Bogaard, C. D. Frith, L. J. Rappelle, R. Brenner, A. Joutel, K. Fuxe, G. HÄcker, M. J. Blaser, J. Valls-SolÇ, G. Ulm, M. Alberdi, A. Bock, F. W. Bertelsmann, U. Wieshmann, J. Visa, J. R. Lupski, D. D'Amico, L. M. P. Ramos, A. A. Vanderbark, R. Horn, M. Warmuth, Dietmar Kühne, Mark S. Palmer, C. Ehrenheim, E. Canga, S. Viola, O. Scarpino, P. Naldi, R. Almeida, A. A. Raymond, J. Gamez, Stephan Arnold, A. DiGiovanni, J. Dalmau, C. C. Chari, H. F. Beer, J. C. Koetsier, J. Iriarte, E. Yunis, J. Casadevall, E. Le Guern, E. Stenager, S. R. Benbadis, J. M. Warter, F. Burklin, I. Theodorou, L. Johannesen, G. A. Graveland, X. Leclerc, I. Vecchio, L. Ozelius, G. Nicoletti, R. K. Gherardi, E. Esperet, M. L. Delodovici, F. Cattin, F. Paiau, Giorgio Sacilotto, C. A. J. Broere, D. Chavdarov, J. P. Willmer, C. H. Hawkes, Th. Naegele, E. Ellie, E. Dartigues, M. J. Guardiola, S. Hesse, Z. Levic, Marco Rovaris, P. Saugeir-Veber, B. A. Yaqub, H. F. Durwen, R. Larumbe, J. Ballabrina, M. Sendtner, J. Röther, M. Horstink, C. Kluglein, M.P. Montesi, H. Apaydin, J. Montoya, E. Waubant, Ch. Verellen-Dunoulin, A. Nicolai, J. Lopez-Delval, R. Lemon, G. Cantinho, E. Granieri, A. Zeviani, Wolfgang H. Oertel, U. Ficola, V. Di Piero, V. Fragola, K. Sabev, M. V. Guitera, I. Turki, F. Bolgert, P. Ingrand, J. M. Gobernado, L. M. E. Grimaldi, S. Baybas, B. Eymard, Y. Rolland, Y. Robitaille, Ta. Pampols, P. J. Koehler, A. Carroacedo, J. Vilchez, S. Di Vittorio, I. R. Rise, T. Nagy, M. Kuffner, E. Palazzini, A. Ott, J. Pruim, T. X. Arbizu, E. Manetti, C. Cervera, S. Felber, G. Gursoy, J. Scholz, G. A. Buscaino, M. S. Chen, A. Pascual, J. Hazan, J. U. Gajda, J. G. Cea, G. Bottini, G. Damalik, F. Le Doze, G. Bonaldi, J. M. Hew, C. Messina, A. M. Kennedy, J. M. Carney, N. M. F. Murray, M. Parent, M. Koepp, V. Dimova, D. De Leo, K. Jellinger, G. Salemi, S. Mientus, M. L. Hansen, F. Mazzucchelli, J. Vieth, M. Mauri, E. Bartels, L. Johannsen, C. Humphreys, J. Emile, D. N. Landon, E. Kansu, R. Sanchez-Pernaute, Rsj Frackowiak, M. Gonzalez Torres, L. Oller, C. Machedo, J. Kother, M. Billiard, H. Durak, T. Schindler, A. Frank, A. Uncini, A. Sbriccoli, C. Farinas, D. W. Paty, N. Fast, A. T. Zangaladze, A. Kerkhofs, J. M. Pino Garcia, I. De la Fuente, B. Marini, L. Gomez, I. Rubio, Alessandra Bardoni, C. Brodie, P. Acin, U. Sliwka, S. A. Hawkins, S. Tardieu, F. Vitullo, J. M. Pereira Monteino, R. Gagliardi, T. Jezewski, A. Cano, T. Lempert, F. Abad Alegria, G. Rotondo, D. Ince, C. Martinez Parra, Y. Huang, H. Luders, Y. Steinvil, F. G. A. Van Der Meche, R. Bianchi, A. Sanchez, T. Sevilla, J. M. Ketelslegers, A. Domzal-Stryga, M. Pandolfo, M. O. Josse, K. W. Neff, I. Blanco, G. W. Bruyn, O. W. Witte, J. L. Thibault, G. Andersen, J. Pariset, A. Marcone, R. J. M. Lane, A. Hofman, M. Verin, T. Matilla, P. Bedoucha, J. Roche, M. Lai, M. Collard, A. Ugarte, F. Gallecho, D. Silbersweig, C. Kennard, J. P. Azulay, T. W. Ho, P. L. I. Dellemijn, R. Girardello, F. Baas, B. Voss, F. Rozenberg, E. M. Brocker, V. Stanev, A. A. J. Soeterboek, A. Marra, A. Rey, E. Ertem, M. Sawradewicz-Rybak, J. De Keyser, P. Cavallari, F. Proust, Y. Chevalier, H. C. Hansen, D. Leys, C. A. Davie, K. Hoang-Xuan, C. Bairati, H. van Crevel, Thomas T. Warner, B. Bompais, A. Dobbeleir, T Campbell, C. Macko, C. J. M. Klijn, M. Dussallant, T. P. Berlit, W. Rozenbaum, M. J. van den Bent, W. A. Rocca, M. Muller, H. Hundemer, U. Zifko, M. Campera, F. Drislane, D. Ranoux, T. M. Kloss, Anil Kumar, I. Ruolt, C. Bargnani, B. Marescau, N. A. Losseff, S. Notermans, B. Kint, E. T. Burke, C. Aykut, J. Matias Guiu, P. Maquet, T. Drogendijk, M. Leone, K. von Ammon, M. Pepeliarska, C. Prados, L. DiGiamberardino, T. Logtenberg, G. Lenoir, I. Castaldo, Damhaut, M. Radionova, G. Sirabian, R. 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Frigo, Leif Østergaard, J. L. Munoz Blanco, A. Cruz-Matinez, J. De Reuck, C. Theillet, T. Barroso, V. Oikonen, Florence Lebert, M. Kilinc, C. Cordon-Cardon, G. Stoll, E. Thiery, F. Pulcinelli, J. Solski, M. Schmiegelow, L. J. Polman, P. Fernandez-Calle, C. Wikkelso, M. Ben Hamida, M. Laska, E. Kott, W. Sulkowski, C. Lucas, N. M. Bornstein, D. Schmitz, M. W. Lammers, A. de Louw, R. J. S. Wise, P. A. van Darn, C. Antozzi, P. Villanueva, P. H. E. Hilkens, C. Constantin, W. Ricart, A. Wolf, M. Gamba, P. Maguire, Alessandro Padovani, B. M. Patten, Marie Sarazin, H. Ackermann, L. Durelli, S. Timsit, Sebastian Jander, B. W. Scheithauer, G. Demir, J. P. Neau, P. Barbanti, A. Brand, N. AraÇ, V. Fischer-Gagnepain, R. Marchioli, G. Serratrice, C. Maugard-Louboutin, G. T. Spencer, D. Lücke, G. Mainardi, K. Harmant Van Rijckevorsel, G. B. Creel, R. Manzanares, Francesco Fortunato, A. May, J. Workman, K. Johkura, E. Fernandez, Carlo Colosimo, L. Calliauw, L. Bet, Félix F. Cruz-Sánchez, M. Dhib, H. Meinardi, F. Carrara, J. Kuehnen, C. Peiro, H. Lassmann, K. Skovgaard Olsen, A. McDonald, L. Sciulli, A. Cobo, A. Monticelli, B. Conrad, J. Bagunya, J. Benitez, V. Desnizza, B. Dupont, O. Delrieu, D. Moraes, J. J. Heimans, F. Garcia Rio, M. Matsumto, A. Fernandez, R. Nermni, R. Chalmers, M. J. Marchau, F. Aguado, P. Velupillai, P. J. Martin, P. Tassan, V. Demarin, A. Engelien, T. Gerriets, Comar, J. L. Carrasco, J. P. Pruvo, A. Lopez de Munain, D. Pavitt, J. Alarcon, Chris H. Polman, B. Guldin, N. Yeni, Hartmut Brückmann, N. Wilczak, H. Szwed, R. Causaran, G. Kyriazis, M. E. Westarp, M. Gasparini, N. Pecora, J. M. Roda, E. Lang, V. Scaioli, David R. Fish, D. Caputo, O. Gratzl, R. Mercelis, A. Perretti, G. Steimetz, I. Link, C. Rigoletto, A. Catafau, G. Lucotte, M. Buti, G. Fagiolari, A. Piqueras, C. Godinot, J. C. Meurice, Erodriguez J. Dominigo, F. Lionnet, H. Grzelec, David J. Brooks, P. M. G. Munro, F. X. Weilbach, M. Maiwald, W. Split, B. Widjaja-Cramer, V. Ozturk, J. Colas, E. Brizioli, J. Calleja, L. Publio, M. Desi, R. Soffietti, P. Cortinovis-Tourniaire, E. F. Gonano, G. Cavaletti, S. Uselli, K. Westerlind, H. Betuel, C. O. Dhiver, H. Guggenheim, M. Hamon, R. Fazio, P. Lehikoinen, A. Esser, B. Sadzot, G. Fink, Angelo Antonini, D. Bendahan, V. Di Carlo, G. Galardi, A. F. Boller, M. Aksenova, Del Fiore, V. de la Sayette, H. Chabriat, A. Nicoletti, A. Dilouya, M. L. Harpin, E. Rouillet, J. Stam, A. Wolters, M. R. Delgado, Eduardo Tolosa, G. Said, A. J. Lees, L. Rinaldi, A. Schulze-Bonhage, MA Ron, C. Lefebvre, E. W. Radü, R. Alvarez, M. L. Bots, P. Reganati, S. Palazzi, A. Poggi, N. J. Scolding, V. Sazdovitch, T. Moreau, E. Maes, M. A. Estelies, P. Petkova, Jose-Felix Marti-Masso, G De La Meilleure, N. Mullatti, M. Rodegher, N. C. Notermans, T. A. T. Warner, S. Aktan, J. P. Louboutin, L. Volpe, C. Scheidt, W. Aust, C. M. Wiles, U. Schneider, S. K. Braekken, W. R. Willems, K. Usuku, Peter M. Rothwell, C. Talamon, M. L. Sacchetti, A. Codina, M. H. Marion, A. Santoro, J. Roda, A. Bordoni, D. J. Taylor, S. Ertas, H. H. Emmen, J. Vichez, V. BesanÇon, R. E. Passingham, M. L. Malosio, A. Vérier, M. Bamberg, A. W. Hansen, E. Mostacero, G. Gaudriault, Marie Vidailhet, B. Birebent, K. Strijckmans, F. Giannini, T. Kammer, I. Araujo, J. Nowicki, E. Nikolov, A. Hutzelmann, R. Gherardi, J. Verroust, L. Austoni, A. Scheller, A. Vazquez, S. Matheron, H. Holthausen, J. M. Gerard, M. Bataillard, S. Dethy, V. H. Patterson, V. Ivanez, N. P. Hirsch, F. Ozer, M. Sutter, C. Jacomet, M. Mora, Bruno Colombo, A. Sarropoulos, T. H. Papapetropoulos, M. Schwarz, D. S. Dinner, N. Acarin, B. Iandolo, J. O. Riis, P. R. J. Barnes, F. Taroni, J. Kazenwadel, L. Torre, A. Lugaresi, I. L. Henriques, S. Pauli, S. Alfonso, Pedro Quesada, A. S. T. Planting, J. M. Castilla, Thomas Gasser, M. Van der Linden, A. Alfaro, E. Nobile-Orazio, G. Popova, W. Vaalburg, F. G. A. van der Mech, L. Williams, F. Medina, J. P. Vernant, J. Yaouanq, B. Storch-Hagenlocher, A. Potemkowski, R. Riva, M. H. Mahagne, M. Ozturk, Ve. Drory, N. Konic, C. Jungreis, A. Pou Serradell, J. L. Gauvrit, G. J. Chelune, S. Hermandez, T. Dingus, L. Hewer, Ch. Koch, M. N. Metz-Lutz, G. Parlato, M. Sinaki, Charles Pierrot-Deseilligny, H. C. Diener, J. Broeckx, J. Weill-Fulazza, M. L. Villar, M. Rizzo, O. Ganslandt, C. Duran, N. A. Fletcher, G. Di Giovacchino, Susan T. Iannaccone, C. Kolig, N. Fabre, H. A. Crockard, Rita Bella, M. Tazir, E. Papagiannuli, K. Overgaard, Emma Ciafaloni, I. Lorenzetti, F. Viader, P. A. H. Millac, I. Montiel, L. H. Visser, M. Palomar, P. L. Murgia, H. Pedersen, Rafael Blesa, S. Seddigh, W. O. Renier, I. Lemahieu, H. M. L. Jansen, L. Rosin, J. Galofre, K. Mattos, M. Pondal, G. M. Hadjigeorgiou, D. Francis, L. Cantin, D. Stegeman, M. Rango, A. B. M. F. Karim, S. Schraff, B. Castellotti, I. Iriarte, E. Laborde, T. J. Tjan, R. Mutani, D. Toni, B. Bergaasco, J. G. Young, C. Klotzsch, A. Zincone, X. Ducrocq, M. Uchuya, O. J. Kolar, A. Quattrone, T. Bauermann, Nereo Bresolin, J. Vallée, B. C. Jacobs, A. Campos, Werner Poewe, J. A. Villanueva, A. W. Kornhuber, A. Malafosse, E. Diez-Tejedor, G. Jungreia, M. J. A. Puchner, A. Komiyama, O. Saribas, V. Volpini, L. Geremia, S. Bressi, A. Nibbio, Timothy E. Bates, T. z. Tzonev, E. Ideman, G. A. Damlacik, G. Martino, G. Crepaldi, T. Martino, Kjell Någren, E. Idiman, D. Samuel, J. M. Perez Trullen, Y. van der Graaf, J. O. Thorell, M. J. M. Dupuis, E. Sieber, R. D'Alessandro, C. Cazzaniga, J. Faiss, A. Tanguy, A. Schick, I. Hoksergen, A. Cardozo, R. Shakarishvili, G. K. Wennlng, J. L. Marti-Vilalta, J. Weissenbach, I. L. Simone, Amalia C. Bruni, Darius J. Adams, C. Weiller, A. Pietrangeli, F. Croria, C. Vigo-Pelfrey, Patricia Limousin, A. Ducros, G. Conti, O. Lindvall, E. Richter, M. Zuffi, A. Nappo, T. Riise, J. Wijdenes, M. J. Fernandez, J. Rosell, P. Vermersh, S. Servidei, M. S. C. Verdugo, F. Gouttiere, W. Solbach, M. Malbezin, I. S. Watanabe, A. Tumac, W. I. McDonald, D. A. Butterfield, P. P. Costa, F. deRino, F. Bamonti, J. M. Cesar, C. H. Lahoz, I. Mosely, M. Starck, M. H. Lemaitre, K. M. Stephan, S. Tex, R. Bokonjic, I. Mollee, L. Pastena, M. Gutierrez, F. Boiler, M. C. Martinez-Para, M. Velicogna, O. Obuz, A. Grinspan, M. Guarino, L. M. Cartier, E. Ruiz, D. Gambi, S. Messina, M. Villa, Michael G. Hanna, J. Valk, Leone Pascual, M. Clanet, Z. Argov, B. Ryniewicz, E. Magni, B. Berlanga, K. S. Wong, C. Gellera, C. Prevost, F. Gonzalez-Huix, R. Petraroli, J. E. G. Benedikz, I. Kojder, C. Bommelaer, L. Perusse, M. R. Bangioanni, Guy M. McKhann, A. Molina, C. Fresquet, E. Sindern, Florence Pasquier, M. J. Rosas, M. Altieri, O. Simoncini, M. Koutroumanidis, C. A. F. Tulleken, M. Dary-Auriol, S. Oueslati, H. Kruyer, I. Nishisho, C. R. Horning, A. Vital, G. V. Czettritz, J. Ph. Neau, B. Mihout, A. Ameri, M. Francis, S. Quasthoff, D. Taussig, S. Blunt, P. Valentin, C. Y. Gao, O. Heinzlef, H. d'Allens, C. Coudero, M. Erfas, G. Borghero, P. J. Modrego Pardo, M. C. Patrosso, N. L. Gershfeld, P. A. J. M. Boon, O. Sabouraud, M. Lara, J. Svennevig, G. L. Lenzi, A. Barrio, H. Villaroya, JosÇ M. Manubens, O. Boespflug-Tanguy, M. Carreras, D. A. Costiga, J. P. Breux, S. Lynn, C. Oliveras Ley, A. G. Herbaut, J. Nos, C. Tornali, Y. A. Hekster, J. L. Chopard, J. M. Manubens, P. Chemouilli, A. Jovicic, F. Dworzak, S. Smirne, S. E. Soudain, B. Gallano, D. Lubach, G. Masullo, G. Izquierdo, A. Pascual Leone Pascual, A. Sessa, V. Freitas, O. Crambes, L. Ouss, G. W. Van Dijk, P. Marchettini, P. Confalonieri, M. Donaghy, A. Munnich, M. Corbo, and M. E. L. van der Burg
- Subjects
Neurology ,business.industry ,Media studies ,Library science ,Medicine ,Neurology (clinical) ,business - Published
- 1994
- Full Text
- View/download PDF
13. The HLA-DRB1 QR/KRAA sequence cannot alone explain the rheumatoid arthritis susceptibility in the Corsican population
- Author
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D. Haras, B. Genetet, P. Cucchi-Mouillot, and J.-P. Amoros
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Autoimmune disease ,education.field_of_study ,business.industry ,Immunology ,Population ,medicine.disease ,Genetic determinism ,language.human_language ,Rheumatology ,Rheumatoid arthritis ,Immunopathology ,medicine ,language ,Immunology and Allergy ,Pharmacology (medical) ,Allele ,business ,education ,HLA-DRB1 ,Corsican - Published
- 1999
- Full Text
- View/download PDF
14. Genetic susceptibility linked to DR4 haplotypes in diabetes of type-la or associated with polyendocrinopathies (type-lb)
- Author
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JD Bignon, A. Allannic, P. Sai, J. Y. Muller, S. Bardet, B. Genetet, M.L. Cheneau, G. Semana, D. Maugendre, and R. Fauchet
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Genetics ,Immunology ,Haplotype ,General Medicine ,Immunogenetics ,Biology ,medicine.disease ,Biochemistry ,law.invention ,HLA-DR locus ,law ,Insulin dependent diabetes ,Diabetes mellitus ,Genetic predisposition ,medicine ,Immunology and Allergy ,Polymerase chain reaction - Published
- 1991
- Full Text
- View/download PDF
15. A Human Anti-Jkb Monoclonal Antibody
- Author
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M. Lecointre-Coatmelec, D. Bourel, J. Ferrette, and B. Genetet
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Hematology ,General Medicine - Published
- 1991
- Full Text
- View/download PDF
16. The HLA-DRB1 QR/KRAA sequence cannot alone explain the rheumatoid arthritis susceptibility in the Corsican population
- Author
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P, Cucchi-Mouillot, J P, Amoros, B, Genetet, and D, Haras
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Arthritis, Rheumatoid ,Epitopes ,Humans ,Genetic Predisposition to Disease ,Amino Acid Sequence ,France ,HLA-DR Antigens ,Alleles ,HLA-DRB1 Chains - Published
- 1999
17. TCR repertoire and cytokine profiles of cerebrospinal fluid- and peripheral blood-derived T lymphocytes from patients with multiple sclerosis
- Author
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B, Birebent, G, Semana, A, Commeurec, G, Edan, B, Genetet, and N, Genetet
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Adult ,Male ,Multiple Sclerosis ,T-Lymphocytes ,Genes, T-Cell Receptor beta ,Receptors, Antigen, T-Cell ,Cytokines ,Humans ,Female ,Middle Aged ,Clone Cells ,Immunophenotyping - Abstract
The cerebrospinal fluid (CSF) represents an important source of T lymphocytes that could be involved in the inflammatory response occurring in the central nervous system in multiple sclerosis (MS). In order to investigate whether the Vbeta gene usage of CSF T lymphocytes is restricted, we analyzed the TCR Vbeta expression in twelve CSF expanded by in vitro culture compared to the paired in vitro-stimulated peripheral blood T lymphocytes. The overexpression of one or two Vbeta genes was demonstrated in ten CSF, but the type of Vbeta over expressed varied from one patient to another. For one patient, the Vbeta repertoire was also investigated by single cell cloning. High frequency of BV6S7-expressing T cell clones was observed in the CSF while no BV6S7 clone was derived from the peripheral blood T lymphocytes suggesting that these cells could be involved in the immunopathological process in the central nervous system (CNS). The cytokine patterns of the T cell clones derived from the CSF- and peripheral blood-T lymphocytes of this patient were determined. The CSF T cell clones produced higher levels of cytokines than the peripheral blood T cell clones. The high frequency of IL-4-producing-T cell clones observed in CSF demonstrate that T cells which could downregulate the inflammatory process are present in the CNS.
- Published
- 1998
18. Epoetin alfa facilitates presurgical autologous blood donation in non-anaemic patients scheduled for orthopaedic or cardiovascular surgery
- Author
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C. Waller, R. Obrist, E. Sundal, M. C. Laxenaire, E. Baudoux, D. Sondag, H. Stocker, J. P. Cazenave, B. Genetet, C. Irrmann, and E. Dupont
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Male ,medicine.medical_specialty ,Blood transfusion ,Anemia ,medicine.medical_treatment ,Iron ,Blood Donors ,Hematocrit ,Placebo ,Bone and Bones ,Blood Transfusion, Autologous ,Intraoperative Period ,Double-Blind Method ,medicine ,Humans ,Adverse effect ,Erythropoietin ,Erythrocyte Volume ,Chemotherapy ,medicine.diagnostic_test ,business.industry ,Cardiovascular Surgical Procedures ,Hemodynamics ,Epoetin alfa ,Middle Aged ,medicine.disease ,Recombinant Proteins ,Surgery ,Anesthesiology and Pain Medicine ,Anesthesia ,Female ,business ,medicine.drug - Abstract
Patients expected to need at least three units of blood for their elective cardiovascular or orthopaedic surgery, were allocated randomly to receive intravenous (i.v.) Epoetin alfa 600 IU kg-1 (n = 27), 300 IU kg-1 (n = 30) or placebo (n = 23), on days 1, 4 and 7. Provided haemoglobin > or = 11 g dL-1, one unit of blood was collected on days 1, 4, 7, 11 and 14. Iron supplementation was given throughout the study. Surgery was scheduled between days 18 and 21. Significantly more patients treated with Epoetin alfa (100% for 600 IU kg-1; 97% for 300 IU kg-1) were able to donate > or = 4 units of blood compared with placebo (78%) (P = 0.011 and P = 0.032). No significant differences were seen in total patient exposure to homologous blood (7.4%, 3.3% and 17.4%, respectively). Mean red cell volume donated (P = 0.005 for 600 IU kg-1; P = 0.158 for 300 IU kg-1 both vs. placebo) and production (P < 0.001 and P = 0.012, respectively) were dose related. Twenty-four patients became iron deficient. No differences in the incidence of adverse events were seen between the groups.
- Published
- 1997
19. Impaired leucocyte functions in diabetic patients
- Author
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M, Delamaire, D, Maugendre, M, Moreno, M C, Le Goff, H, Allannic, and B, Genetet
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Adult ,Male ,Chemotaxis, Leukocyte ,Diabetes Mellitus, Type 1 ,Diabetes Mellitus, Type 2 ,Phagocytosis ,Neutrophils ,Cell Adhesion ,Humans ,Female ,Middle Aged ,Neutrophil Activation - Abstract
This study evaluates polymorphonuclear neutrophil (PMN) cell performance in 61 diabetic patients free of infection (40 Type 1, 21 Type 2), using tests that explore all the functional steps of PMN: (1) adherence: expression of adhesion molecules, CD 11a, CD 11b, CD 11c; nylon fiber adherence test; (2) chemotaxis under agarose towards the bacterial oligopeptide FMLP and complement fractions, used as attracting agents; (3) phagocytosis of opsonized latex microbeads; (4) bactericidal activity: chemiluminescence assessment of the oxidative killing potential before and after stimulation by opsonized zymosan and PMA; nitroblue tetrazolium reduction test. Results were analysed according to potentially influential factors: metabolic control (HbA1C, glycaemia), age of patient, type of diabetes, disease duration, and existence of vascular complications. PMN chemotaxis was significantly lower in patients than in healthy controls (p0.001) and associated with spontaneous adherence and increased expression of adhesion molecules (CD 11b, CD 11c). The increased response to chemiluminescence reflects spontaneous activation of PMN cells and increased free radical production; after stimulation, response was lower than in controls. The type of diabetes, the age of patients, HbA1C level and disease duration did not affect the responses. Chemotaxis and chemiluminescence were further reduced in patients with vascular complications and hyperglycaemia. We conclude that all steps of PMN functioning are altered in diabetic patients, which may increase the risk of vascular complications and infectious episodes.
- Published
- 1997
20. [Polymorphism of the microsatellites and tumor necrosis factor genes in chronic inflammatory bowel diseases]
- Author
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D, Heresbach, A, Ababou, A, Bourienne, M, Alizadeh, E, Quelvennec, M, Pagenault, A, Dabadie, N H, Berre, J P, Campion, B, Launois, M, Gosselin, B, Genetet, J F, Bretagne, and G, Semana
- Subjects
Adult ,Male ,Polymorphism, Genetic ,Tumor Necrosis Factor-alpha ,Chromosome Mapping ,Inflammatory Bowel Diseases ,Crohn Disease ,Haplotypes ,Chronic Disease ,Humans ,Chromosomes, Human, Pair 6 ,Colitis, Ulcerative ,Female ,Disease Susceptibility ,Alleles ,Microsatellite Repeats - Abstract
Multiplex family studies have excluded chromosome 6 as a candidate gene of susceptibility to inflammatory bowel disease. However, one recent study suggested that a gene involved in the pathogenesis of Crohn's disease is located on chromosome 6 confering to a microsatellite allelic combination (a2, b1, c2, d4, e1) a strong genetic risk factor in Crohn's disease. The aim of our study was to determine simultaneously the polymorphisms of the TNF microsatellites and of the genes coding for TNF synthesis in patients with inflammatory bowel disease.Sixty patients with ulcerative colitis, 100 patients with Crohn's disease were compared to 64 healthy ethnically matched controls. Five TNF microsatellite loci (a, b, c, d, e) were typed using polymerase chain reaction PCR, and two dimorphisms of TNF alpha and TNF beta (intron 1) were studied by restriction fragment length polymorphism (RFLP).Allelic frequencies of TNF microsatellites and of TNF alpha and beta genes were similar in Crohn's disease, ulcerative colitis and controls. Five loci microsatellite haplotypes, especially a2 b1 c2 d4 e1 allelic combination, were not more frequent in Crohn's disease (25%) compared to ulcerative colitis (27%) or controls (20%). Subgroups stratification according to clinical characteristics did not modify haplotype frequencies. Analysis of our data taking simultaneously into account the MHC alleles (DRB*01 or DRB1*04) did not modify our data; however, it suggested that extended haplotype on short arm of chromosome 6 differed between patients and controls. Linkage disequilibrium (delta = -360.10(-4); P0.01) between a2, b1, c2, d4, e1 allelic combination and DRB1*04 allele was observed only in Crohn's disease.Percentages of patients with Crohn's disease or ulcerative colitis carrying TNF microsatellite or TNF alpha and beta gene haplotypes were similar to those of healthy controls. These data argue against involvement of the TNF locus without exclusion of short arm of chromosome 6 implication in Crohn's disease pathogenesis.
- Published
- 1997
21. Distinct pattern of IL-2 and IFN-gamma gene expression in CD4 and CD8 T cells: cytofluorometric analysis at a single cell level using non-radioactive probes
- Author
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P Y, Morvan, C, Picot, R, Dejour, B, Genetet, and N, Genetet
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CD4-Positive T-Lymphocytes ,Ionomycin ,Gene Expression ,RNA Probes ,CD8-Positive T-Lymphocytes ,In Vitro Techniques ,Flow Cytometry ,Lymphocyte Activation ,Interferon-gamma ,Kinetics ,CD28 Antigens ,Humans ,Interleukin-2 ,Tetradecanoylphorbol Acetate ,RNA, Messenger ,Digoxigenin ,In Situ Hybridization - Abstract
IL-2 and IFN-gamma gene expression was analyzed using an original method for in situ hybridization (ISH) with non-isotopic probes and flow cytometric analysis (FC). This method permits rapid detection of mRNA at a single cell level among in vitro activated human peripheral blood mononuclear cells (PBMC) and purified CD4 and CD8 T cell subsets. After stimulation with PMA and ionomycin (PMA+Io), cells were fixed at different times and hybridized with digoxigenin (DIG)-labelled RNA antisense or sense probes specific for IL-2 and IFN-gamma. The level of cytokine gene expression in individual cells was visualized using FITC-conjugated anti-DIG antibodies and the fluorescent signal was analyzed by flow cytometry. Specific hybridization with IL-2 and IFN-gamma antisense probes was detected among activated PBMC within lymphoid cells identified by their light scattering properties. Kinetic analysis of the frequency of mRNA producing cells exhibited a biphasic pattern with an early peak at 6-8 hrs. when percentages of IL-2 and IFN-gamma expressing cells reached 35 +/- 7% and 18 +/- 4%, respectively. Similar data were obtained by enzymatic detection on cell smears using AP-conjugated anti-DIG. Combination of ISH with FC was applied to the comparison of the pattern of cytokine gene expression between CD4 and CD8 T cell subsets isolated by negative selection using immunobeads and magnetic separation. IL-2 was expressed by activated CD8 T cells (25-35%), but CD4 T cells were the major producers of IL-2 as assessed by the high frequency of mRNA expressing cells (60%) and the large amount of mRNA per cell relative to the mean fluorescence intensity. In contrast, IFN-gamma mRNA was preferentially expressed by CD8 T cells (27-37%) and a minority of CD4 T cells (17-23%). Despite quantitative differences, kinetic analysis of IL-2 gene expression in CD4 and CD8 T cells showed similar profiles with an early peak at 6-8 hrs. Upregulation of IL-2 gene expression in CD4 T cells by CD28 co-stimulation increases the amount of IL-2 mRNA per cell as visualized by mean fluorescence intensity. In addition the effect of CD28 co-stimulation on IL-2 mRNA stabilisation was demonstrated by the maintenance of a high frequency of IL-2 expressing CD4 T cells and an elevated level of mRNA per cell for prolonged period after PMA+Io stimulation. By contrast CD28 co-stimulation had no obvious effect on IFN-gamma expression.
- Published
- 1995
22. Relevance of 10 Caucasian HLA haplotypes in searches for unrelated bone marrow donors for 100 patients from a single center
- Author
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E, Tron de Bouchony, C, Leberre, C, Dauriac, N, Genetet, C, Lapart, R, Fauchet, P Y, Leprisé, B, Genetet, C, Raffoux, and G, Semana
- Subjects
HLA-DP Antigens ,Tissue and Organ Procurement ,Tissue Donors ,White People ,Europe ,Gene Frequency ,Haplotypes ,HLA Antigens ,Humans ,Transplantation, Homologous ,France ,Registries ,Lymphocyte Culture Test, Mixed ,HLA-DP beta-Chains ,Bone Marrow Transplantation - Abstract
Unrelated donor searches for 100 Caucasian patients were referred to France Greffe de Moëlle Registry (FGM) from September 1987 (24,600 donors) to December 1993 (71,500 donors, 61% DR typed). After DR typing of HLA-A,B matched donors, unsuccessful searches were extended to other European Registries for 36 patients. Twenty two patients had a donor (FGM: 19, other Registries: 3) selected on: (1) HLA-A,B and DRB,DQB1 split identity; and (2) unidirectional relative response5% in MLR performed twice. Estimated probability of finding a compatible donor at 9 months in FGM was 12% (s.e. +/- 4%) and 25% at 2 years (s.e. +/- 6%). This probability was stringently dependent on a phenoidentity to one very common HLA-A,B,DR or B,DR haplotype (25% at 9 months when present, representing 19 of 19 patients with a compatible donor). Without this phenoidentity, the probability was zero per cent (P = 0.0001) in FGM searches and4% (n = 1) in extended searches. The MLR test was shown to be insensitive for screening for DPB1 mismatches. Clinical status influenced the probability of finding a compatible donor at one year ranging from 9% +/- 9% for ALL to 23% +/- 8% for CML (NS). Disregarding DPB1 mismatches is the most efficient way of increasing search efficiency.
- Published
- 1995
23. [Exploration of the various steps of polymorphonuclear neutrophil function in diabetic patients]
- Author
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M, Delamaire, D, Maugendre, M, Moreno, M C, Le Goff, H, Allannic, and B, Genetet
- Subjects
Adult ,Blood Bactericidal Activity ,Neutrophils ,Middle Aged ,Stimulation, Chemical ,Chemotaxis, Leukocyte ,Phagocytosis ,Antigens, CD ,Evaluation Studies as Topic ,Case-Control Studies ,Luminescent Measurements ,Diabetes Mellitus ,Humans ,Basal Metabolism ,Diabetic Angiopathies ,Aged - Abstract
Vascular complications in diabetic patients is a complex, probably multifactorial phenomena involving cellular phagocytosis. The aim of this study was to evaluate polymorphonuclear performance in 61 infection free diabetic patients based on tests of the different cell functions: 1) adhesion:adhesion molecule expression CD11a, CD11b, CD11c; adhesion test on nylon fibers. 2) chemotaxis:chemotaxis under aragose to FMLP (bacteria oligopeptide) and complement fractions. 3) Phagocytosis:latex beads. 4) Bacteriocidal power:chemoluminescence photometric oxidative potential before and after stimulation with opsonized zymosan and PMA; reduction of tetrazolium nitroblue. RESULTS were analyzed according to type of diabetes, glucose control, duration of the disease, history of infection and presence of vascular complications.compared with a group of 30 controls, the diabetic patients had a significant impaired polynuclear chemotaxis function (p0.001) with both spontaneous adhesion and increased expression of adhesion molecules (CD 11b, CD 11c). The chemoluminescence test was increased at the baseline level due to spontaneous polynuclear adhesion and increased production of free radicals. This response decreased after stimulation compared with controls. The type of diabetes, Hb A1c level and history of infection did not appear to have an effect. Inversely, changes in chemotaxis and chemoluminescence were greater in patients with vascular complications. In summary, all the functions of polynuclear neutrophils tested were altered in diabetic patients and could favor vascular complications and infections episodes.
- Published
- 1995
24. [Development of a validation method for readers of ELISA microplates]
- Author
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F, Durand and B, Genetet
- Subjects
Photometry ,Quality Control ,Calibration ,Linear Models ,Humans ,Reproducibility of Results ,Enzyme-Linked Immunosorbent Assay - Abstract
The results, either positive or negative, of the ELISA tests performed on blood donors to detect viral markers, are always validated by reading microplates on photometers. In Rennes, these microplates can be read on MR 7000 (Dynatech) or IEMS (Labsystems) photometers. This step, the last one in the technical sequence, conditions the results. Regular checking of the photometers therefore may enhance the quality of the testing sequence. To check the quality of the photometers, we use a 96-well microplate, the "Universal Calibration Test Plate" marketed by BIO-TEK Instruments USA. The plate includes 8 blank wells, 6 wells equipped with glass filters (3 stained and 3 unstained). This plate comes with a table showing the optical density in relation to the wavelength. We first verify the repeatability of each photometer, and secondly, verify accuracy. The plate also permits verifying the linearity of each photometer. In view of the results, we were able to state that both photometers were accurate, since the results obtained were compatible with an optical density of +/- 0.024 +/- 1%. Do. The tests are repeatable, with a variation coefficient below 0.5%, linearity was verified (r: 0.999 for both photometers). Reading the plate only takes a few minutes and permits daily control of the photometers. It only requires that the test results be reported on a control card to follow-up possible deviations, and technical maintenance can thus be carried out immediately.
- Published
- 1995
25. [Study of class I HLA polymorphism in the Tunisian population]
- Author
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S, Hmida, N, Mojaat, S, Abid, A, Dridi, B, Genetet, K, Boukef, and G, Semana
- Subjects
Polymorphism, Genetic ,Tunisia ,HLA-A Antigens ,Haplotypes ,HLA-B Antigens ,Histocompatibility Antigens Class I ,Humans ,Blood Donors ,Alleles ,Linkage Disequilibrium - Abstract
The HLA class I gene polymorphism (HLA-A, -B) was investigated in a population of 102 Tunisians. Allele and haplotype frequencies as well as linkage disequilibrium between HLA-A and HLA-B loci were calculated and compared with other populations. The most frequent alleles were A2 (23%), A30 (12.5%), A3 (10.2%), A1 (8.5%), A23 (7.4%) for the HLA-A locus and B21 (14.3%), B44 (11.4%), B35 (9.6%), B5 (8.5%) for the HLA-B locus. The most frequent haplotype was A3 B21 (2.6%) and a positive linkage disequilibrium was found for the following allelic associations: A11 B35 (X2 = 6.8), A28 B35 (X2 = 5.3), and A30 B35 (X2 = 5). In conclusion, a specific distribution of HLA class I components in terms of antigen and haplotype frequencies characterizes the Tunisian population. This specific pattern may reflect the great ethnical diversity of this community. All these informations may be helpful in the future for HLA and disease association studies.
- Published
- 1995
26. [Development of a control method for sample distributors]
- Author
-
F, Durand, B, Annic, and B, Genetet
- Subjects
Quality Control ,Blood Specimen Collection ,Hematologic Tests ,Regression Analysis - Abstract
The use in routine of distribution automations in Blood Bank laboratories should imply regular testing of the equipment by users. This work was carried out on Microlabs as well as on an IEMS. We used a coloured solution (Alizarine Red in pH9 buffer). We applied the Beer-Lambert law, knowing that any volume modification induces a change in optical density. After testing the linearity of the photometers used in the laboratory, we set up 4 distribution programmes so as to simulate classic distribution of diluted or undiluted serum: 1) for large volume dispensing, 2) for small volume distribution in a small amount of buffer, 3) for distribution of small volumes in large buffer volumes, 4) a specific IEMS programme. Results, expressed as coefficients of variation (CV) for each volume, varied from 9.8 to 0.7% according to the programme. These results show that large volume distribution does not pose any problem (CV5%). When dilution occurs, the error observed in serum distribution adds up to that of the thinner, and the smaller the two volumes, the greater is the error. It therefore appears necessary to find the best compromise between serum volume and thinner volume to obtain a CV5%. This error may appear negligible in semi-quantitative tests, but it may be important in quantitative tests. Lastly, this programme can easily be adapted in routine to monitor the dispensers efficiently.
- Published
- 1995
27. Polymorphism of the HLA90 new class I gene
- Author
-
R. Fauchet, G. Semana, C. Legras, B. Genetet, and M. Alizadeh
- Subjects
Genetics ,Polymorphism, Genetic ,Base Sequence ,Databases, Factual ,HLA-A Antigens ,Molecular Sequence Data ,Genes, MHC Class I ,General Medicine ,Human leukocyte antigen ,DNA ,Biology ,Polymerase Chain Reaction ,Linkage Disequilibrium ,Gene mapping ,Genetic marker ,Humans ,Chromosomes, Human, Pair 6 ,Restriction fragment length polymorphism ,Oligonucleotide Probes ,Molecular Biology ,Allele frequency ,Gene ,Genetics (clinical) - Published
- 1994
28. In situ hybridization and cytofluorometric analysis of cytokine mRNA during in vitro activation of human T cells
- Author
-
P Y, Morvan, C, Picot, R, Dejour, E, Gillot, B, Genetet, and N, Genetet
- Subjects
T-Lymphocytes ,Fluorescent Antibody Technique ,Gene Expression ,In Vitro Techniques ,Flow Cytometry ,Lymphocyte Activation ,Cell Line ,Rats ,Interferon-gamma ,T-Lymphocyte Subsets ,Animals ,Interleukin-2 ,Biological Assay ,Colorimetry ,RNA, Messenger ,Cycloheximide ,In Situ Hybridization, Fluorescence - Abstract
We present an original method for in situ hybridization (ISH) using non isotopic probes and flow cytometry analysis that permits rapid detection of lymphokine transcripts at single cell level in an in vitro activated human Jurkat T cell line and in peripheral blood T cell subsets. After PMA and either ionomycin or ConA stimulation, cells were fixed and hybridized with digoxigenin (DIG)-labelled RNA antisense or sense probes specific for IL-2 and IFN-gamma. The level of cytokine gene expression in individual cells was visualised using FITC-conjugated anti-DIG antibody, and the resultant signal was analysed by flow cytometry. IL-2 mRNA was first detected in activated Jurkat T cells. Addition of cycloheximide 4 hours after the beginning of stimulation increased both the frequency of labelled cells and the amount of mRNA per cell, as determined by the mean fluorescence intensity. The specificity and sensitivity of IL-2 mRNA detection were tested by comparison with Northern blot analysis and in situ hybridization (ISH) with immuno-cytochemical staining. IL-2 and IFN-gamma mRNA were detectable in PBMC as early as 3 hours after in vitro stimulation with PMA and ionomycin. The frequency of positive cells and the amount of mRNA per cell peaked at 6-8 hours, when the percentages of IL-2 and IFN-gamma mRNA-containing cells reached 30-40% and 15-20%, respectively. The two lymphokines were expressed in both CD4+ and CD8+ T cells, but the frequency of IL-2 expressing cells and the amount of IL-2 mRNA per cell were higher in CD4+ (60%) than in CD8+ T cells (25%), whereas IFN-gamma were preferentially transcribed by CD8+ T cells (40%). The results obtained by this method were in accordance with the data obtained by Northern blot analysis, with cellular protein content estimated by immuno-fluorescence staining, and with IL-2 titration by bioassay. We compared the performance of this method with ISH using radioactive probes.
- Published
- 1994
29. Interferon production in severe hemophiliacs with and without HIV antibodies
- Author
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B. Genetet, M. Pommereuil, A. Berthier, C. Duvail, B. Fauconnier, A. Ruffault, P.M. André, N. Genetet, and H. Morel
- Subjects
Immunology ,Alpha interferon ,In Vitro Techniques ,Hemophilia A ,Peripheral blood mononuclear cell ,Virus ,Serology ,Interferon-gamma ,Interferon ,Reference Values ,Virology ,HIV Seropositivity ,medicine ,Humans ,Interferon gamma ,Interferon alfa ,biology ,Transfusion Reaction ,Parainfluenza Virus 1, Human ,Interferon Type I ,biology.protein ,Leukocytes, Mononuclear ,Interferons ,Antibody ,medicine.drug - Abstract
The interferon (IFN) system, both serum IFN levels and the in vitro IFN production, was investigated in 38 clinically asymptomatic multitransfused hemophiliacs, half positive and half negative for HIV antibodies. In most patients, no circulating IFN was detected; similar levels of IFN-alpha were obtained after peripheral blood mononuclear cell (PBMC) stimulation with Sendai virus both in hemophiliacs and controls, while production of IFN-gamma following stimulation with phytohemagglutin (PHA) was diminished in a large number of patients irrespective of their HIV serology. These data indicate that the deficiency in IFN-gamma generation is not only related to HIV contamination but may be a direct consequence of the chronic antigenic stimulation through Factor VIII concentrates.
- Published
- 1992
30. Prevalence of hepatitis C in multitransfused Tunisian patients
- Author
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J, Slama, N, Mojaat, M, Bjaoui, F, Durant, D, Gueguen, K, Boukef, and B, Genetet
- Subjects
Hepatitis B Surface Antigens ,Tunisia ,Incidence ,Prevalence ,Cytomegalovirus ,Humans ,Transfusion Reaction ,Hepatitis Antibodies ,HIV Antibodies ,Antibodies, Viral ,Child ,Hepatitis C - Published
- 1992
31. Genetic susceptibility linked to DR4 haplotypes in diabetes of type-1a or associated with polyendocrinopathies (type-1b). The Diabetes Study Group from West France
- Author
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J D, Bignon, G, Semana, S, Bardet, M L, Cheneau, D, Maugendre, R, Fauchet, J Y, Muller, B, Genetet, A, Allannic, and P, Sai
- Subjects
Genetic Markers ,Base Sequence ,Genes, MHC Class II ,Molecular Sequence Data ,Endocrine System Diseases ,Polymerase Chain Reaction ,White People ,Autoimmune Diseases ,Diabetes Mellitus, Type 1 ,Gene Frequency ,Haplotypes ,HLA-DR4 Antigen ,Humans ,Genetic Predisposition to Disease ,Disease Susceptibility ,Alleles - Published
- 1991
32. [Incidence of blood transfusion on the development of cancer]
- Author
-
B, Genetet
- Subjects
Rectal Neoplasms ,Neoplasms ,Colonic Neoplasms ,Immune Tolerance ,Humans ,Transfusion Reaction ,Erythrocyte Transfusion - Abstract
It has been known since 1974 that blood transfusion can depress the immune system, which proved to be a benefit for future renal transplant recipients since transplants were found to be better tolerated after one or several pre-transplantation transfusions. Hence the idea that the immunodepression thus obtained could have deleterious effects on cancer patients operated upon and receiving a blood transfusion during surgery. The first retrospective study, carried out in 1982, showed that among patients with cancer of the colon 84 percent of those who had not been perfused and only 51 percent of those who had been perfused were alive and without recurrence at 5 years. Since this study, numerous reports have been published with conflicting results in patients with cancer of the colon and rectum, as well as uterine cervix, kidney, lung, breast, vulva, stomach, soft tissues and the E.N.T. region cancers. Several hypotheses have been formulated to explain the immunosuppression, ranging from the action of "substances" in the plasma-solution sampling mixe to disorders in eicosanoids metabolism induced by blood perfusion. Today, no firm and definite conclusion can be drawn from these reports, but labile components of blood must always be used with caution.
- Published
- 1991
33. A human anti-Jkb monoclonal antibody
- Author
-
D. Bourel, B. Genetet, J. Ferrette, and M. Lecointre-Coatmelec
- Subjects
Herpesvirus 4, Human ,medicine.drug_class ,Polyethylene glycol ,Biology ,Monoclonal antibody ,Peripheral blood mononuclear cell ,Virus ,Monocytes ,chemistry.chemical_compound ,Mice ,hemic and lymphatic diseases ,medicine ,Animals ,Humans ,Cloning ,Hybridomas ,Rh-Hr Blood-Group System ,Antibodies, Monoclonal ,Hematology ,General Medicine ,Cell Transformation, Viral ,Virology ,Molecular biology ,Blood grouping ,Hybridoma cell ,chemistry ,biology.protein ,Antibody ,Multiple Myeloma - Abstract
Peripheral blood mononuclear cells of an immunized patient were transformed with Epstein-Barr virus and then fused with P3X63Ag8 mouse myeloma cells by polyethylene glycol. After the cloning, a hybridoma cell line secreting specific anti-Jkb monoclonal antibody was isolated. The antibody was produced in supernatant form and tested for its use as a blood grouping reagent.
- Published
- 1991
34. [Improvement of hemorheologic parameters in hemodialyzed patients treated with human recombinant erythropoietin]
- Author
-
M, Delamaire, F, Durand, D, Hamel, V, Joyeux, P, Lepogamp, and B, Genetet
- Subjects
Erythrocyte Aggregation ,Male ,Renal Dialysis ,Erythrocyte Deformability ,Humans ,Anemia ,Female ,Blood Viscosity ,Rheology ,Erythropoietin ,Recombinant Proteins - Abstract
Recombinant human erythropoietin (rhu EPO) is the choice treatment of dialytic anemia; however, this therapy has side effects due to the increased number of blood components involved. It seemed to us worth assessing, by hemorheological study, the impact of such a treatment on blood flow properties, already impaired in this type of patients. This study was designed to measure the evolution of hemorheological parameters in 16 hemodialysed patients before and after 2.3 and 6 months of treatment with rhu EPO. Hemorheological work-ups included: erythrocyte filtration with a hemorheometer; blood and plasma viscosities (LS30), ATP and 2.3 DPG, RBC aggregation (Sefam erythroaggregameter), RBC morphology under a scanning electron microscope; blood counts and full biochemical work-ups were performed to explore renal function. The results showed, besides a significant increase in hemoglobin: normalized rigidity index, reflecting the better deformability of erythrocytes; a moderate increase in blood viscosity with uncorrected hematocrit, becoming significant after 6 months of treatment. This increase however did not reach the values that could be expected with the increased hematocrit (it was probably balanced by improved erythrocyte deformability, which is confirmed by the fact that with corrected hematocrit, blood viscosity decreases during treatment). Studying erythrocyte aggregation in hemodialysed patients reveals, in the absence of any treatment, a decrease in aggregation time and a higher dissociation threshold, which reflects a tendency to erythrocyte hyperaggregation enhanced by erythropoietin.(ABSTRACT TRUNCATED AT 250 WORDS)
- Published
- 1991
35. Contents Vol. 16, 1999
- Author
-
S. Thulesen, Carsten Röpke, D. Haras, Moncef Zouali, A. Jørgensen, Abdellatif Maalej, Valérie Barbié, M. Holst Nissen, L. Contu, J.-P. Amoros, Jens Gerwien, C. Carcassi, Niels Ødum, Anders Elm Pedersen, Mogens H. Claesson, Rolf Binder, Dominique Scaviner, J. Jouida, L. Floris, Michael Kirschfink, B. Genetet, P. Cucchi-Mouillot, M. Abid, H. Ayadi, Alexander Kress, Marie-Paule Lefranc, Mikael Dohlsten, H. Makni, Manuel Ruiz, F. Fakhfakh, Sara Lai, Morten Ruhwald, and P. Silicani-Amoros
- Subjects
Immunology ,Genetics ,Genetics (clinical) - Published
- 1999
- Full Text
- View/download PDF
36. Evidence for a polymorphism of HLA-G gene
- Author
-
M. Alizadeh, C. Legras, G. Semana, B. Genetet, and R. Fauchet
- Subjects
Immunology ,Immunology and Allergy ,General Medicine - Published
- 1993
- Full Text
- View/download PDF
37. Interaction between TCR beta genes and HLA DR-DQ genes determines the response to autoantigen peptides in SLE patients and family members
- Author
-
Sylviane Muller, Pierre Youinou, Loïc Guillevin, Gilbert Semana, B. Genetet, Jean-Charles Piette, and Jean Jouquan
- Subjects
Hla dr dq ,Immunology ,T-cell receptor ,Immunology and Allergy ,General Medicine ,Biology ,Beta (finance) ,Gene - Published
- 1993
- Full Text
- View/download PDF
38. Données récentes sur la région HLA-D de l'homme
- Author
-
O. Bouhallier, Fauchet R, B. Genetet, and N. Genetet
- Subjects
Genetics ,Gene Organization ,Polymorphism (computer science) ,Hematology ,General Medicine ,Immunogenetics ,Biology - Published
- 1984
- Full Text
- View/download PDF
39. Can the Existing Age Limitations for the Donation of Blood Be Extended without Changing the Requirements for Medical Control?
- Author
-
P.J. Schmidt, B. Genetet, María L. Marty, J.A.F. Napier, N. Coudurier, F.A. Ala, Carbonell F, Julia Montoro, W. Wagstaff, C.D. de Wit, V. Sachs, R. Nordhagen, and G. Sandler
- Subjects
medicine.medical_specialty ,business.industry ,Donation ,Control (management) ,Medicine ,Hematology ,General Medicine ,Medical emergency ,business ,medicine.disease ,Surgery - Published
- 1986
- Full Text
- View/download PDF
40. Idiopathic hemochromatosis: A study of biochemical expression in 247 heterozygous members of 63 families: Evidence for a single major HLA-linked gene
- Author
-
Renée Fauchet, Carole Beaumont, Pierre Brissot, Y Hita de Nercy, B. Hery, M. Simon, Michel Bourel, Hespel Jp, and B. Genetet
- Subjects
Genetics ,Hepatology ,medicine.diagnostic_test ,Gastroenterology ,Chromosome ,Disease ,Human leukocyte antigen ,Biology ,Genetic linkage ,Serum iron ,medicine ,Homologous chromosome ,Allele ,Gene - Abstract
The hypothesis has been advanced that the two genes on chromosome 6 determining idiopathic hemochromatosis are not identical alleles and therefore that the disease is not recessively inherited, but rather that two different genes are involved. A study of 63 families points to: (a) the rarity with which a single hemochromatosis gene finds biochemical expression (in only 1 of 5 cases), as revealed through determinations of serum iron, serum ferritin and the desferrioxamine test; (b) no difference in HLA-antigen marking between genes with and those without biochemical expression; (c) no difference other than that produced by chance in the biochemical expression of the two genes in families; and (d) the finding in one highly informative family of identical expression of the two genes. It is concluded that idiopathic hemochromatosis is determined by two homologous alleles in accordance with the classical mode of recessive inheritance.
- Published
- 1980
- Full Text
- View/download PDF
41. Filtration pressure and red blood cell deformability: Evaluation of a new device: erythrometer
- Author
-
Joffre A, B. Genetet, M. Gueguen, Bidet Jm, Driss F, and F. Durand
- Subjects
Erythrocytes ,Chromatography ,Materials science ,Physiology ,Scanning electron microscope ,Ultrafiltration ,Viscometer ,Volumetric flow rate ,law.invention ,Membrane Lipids ,Red blood cell ,medicine.anatomical_structure ,Membrane ,Hematocrit ,Evaluation Studies as Topic ,law ,Physiology (medical) ,medicine ,Humans ,Suspension (vehicle) ,Filtration ,Whole blood - Abstract
The authors have tested a new device that records the filtration pressure of a suspension of red blood cells (R.B.C.) passing through a 3 micron pore diameter filter. As the flow rate is constant, the pressure increase allows to appreciate an index of the R.B.C. deformability. In order to test the performances of this new equipment, the authors have studied the influence of the variation of the following parameters. Haematocrit from 0.5 to 2%, Buffer composition; time elapsing from drawing to measurement: from hour 0 to hour 3. This analysis has been performed on donors; on packed red cells preserved in CPD, from D0 to D21 and on patients specimens and the results have been compared to the whole blood filtration according to the Reid and Dormandy method. The following parameters were simultaniously measured: Whole blood viscosity by means of a Low Shear 30 viscosimeter, Intraerythrocyte ATP by bioluminescence, Membrane lipid composition (cholesterol, phospholipids), Scanning electron microscopy. This new apparatus, measuring the filtration pressure seems to be a more sensitive and reproductible method allowing to approach the RBC deformability, and quite usefull in clinical haemorheology.
- Published
- 1984
- Full Text
- View/download PDF
42. Spleen cell populations in normal and tumor-bearing hamsters
- Author
-
G. Merdrignac, B. Genetet, C. De Vaux Saint Cyr, and H. Haddada
- Subjects
Pathology ,medicine.medical_specialty ,Immunology ,Spleen cell ,Cell Count ,Spleen ,Receptors, Fc ,Biology ,Immunofluorescence ,Cricetinae ,medicine ,Null cell ,Animals ,Immunology and Allergy ,Tumor growth ,Lymphocytes ,Receptor ,Electron microscopic ,Mesocricetus ,medicine.diagnostic_test ,Receptors, IgG ,Neoplasms, Experimental ,Molecular biology ,Specific antibody ,medicine.anatomical_structure - Abstract
Spleen cell subpopulations from normal and tumor-bearing hamsters (TBH) were quantified using Petri dishes coated with specific antibodies, and by flow cytometric immunofluorescence analysis. The relative numbers of T cells (Thy + cells) decreased, by both methods, as a function of tumor growth, while the number of B cells (bearing surface Ig) increased. Cells without T or B markers (null cells) were more numerous in the spleen of TBH and a large number of them expressed the receptor for the Fc fragment of IgG. Splenic cells were also sorted according to their light-scattering properties, and electron microscopic analysis was performed on the sorted fractions. It showed the presence of secreting plasmocytes and activated macrophages in the spleen of TBH.
- Published
- 1985
- Full Text
- View/download PDF
43. Bilan enzymologique chez les donneurs de sang
- Author
-
M. Nettavong, R. Fauchet, B. Rebour, A. Beauplet, J.J. Torte, N. Savouré, and B. Genetet
- Subjects
Hematology ,General Medicine - Abstract
Resume Depuis la mise en application de la detection systematique du VHB chez le donneur de sang, cette affection est passee au second plan par rapport aux hepatites post-transfusionnelles NANB. Or l'absence de moyens serologiques specifiques pour la detection de ces dernieres, a conduit certaines equipes a preconiser le retour aux dosages enzymatiques hepatiques (essentiellement par le dosage des SGPT), afin d'eliminer les sujets pouvant presenter un risque pour le receveur. Afin d'evaluer l'importance de ces anomalies au sein de la population des donneurs reguliers du Centre Regional de Transfusion de Rennes, un bilan enzymatique (2) a ete pratique sur 300 sujets pris au hasard (SGPT, SGOT, LDH), Phosphatases alcalines, gamma GT). Une serie d'examens biologiques immunologiques et hematologiques completait cette enquete. Ces examens ont permis de mettre en evidence une frequence appreciable d'anomalies de degre variable. Elles portaient surtout sur une elevation du taux des transaminases et des gamma GT qui etaient par ailleurs frequemment associees. On a pu noter aussi quelques resultats immunologiques anormaux et surtout une frequence appreciable d'augmentation des volumes globulaires moyens (VGM), accompagnant les elevations des transaminases et/ou des gamma GT. Ces signes biologiques anormaux repartis dans une population en large proportion masculine, etaient dans certains cas evocateurs d'impregnation ethylique. Ces constatations ont conduit a discuter de certains aspects problematiques quant a l'utilisation du dosage enzymatique hepatique dans le choix des donneurs. En effet, la frequence d'elevation des transaminases conduirait probablement a supprimer une fraction non negligeable de l'ensemble des donneurs, et en tout cas, a ecarter nombre de sujets dont les aberrations enzymatiques relevent d'une toute autre cause qu'une etiologie virale NANB. A cet egard le choix du seuil discriminant de SGPT semble encore mal defini et devrait tenir compte des differences de normes relatives aux diverses techniques de dosage des transaminases. Enfin les retombees economiques pour les Centres de Transfusion et psychologiques au niveau des donneurs sont autant d'inconnues a prendre en consideration.
- Published
- 1983
- Full Text
- View/download PDF
44. Characterization and sorting of mouse cytotoxic macrophages by their light scattering properties
- Author
-
B. Collet, A. Martin, G. Merdrignac, and B. Genetet
- Subjects
Cytotoxicity, Immunologic ,Light ,Biophysics ,Biology ,Light scattering ,Pathology and Forensic Medicine ,Flow cytometry ,Mice ,Endocrinology ,medicine ,Animals ,Scattering, Radiation ,Macrophage ,Cytotoxic T cell ,Cytotoxicity ,medicine.diagnostic_test ,Scattering ,Macrophages ,Acid phosphatase ,Cell Biology ,Hematology ,Cell sorting ,Flow Cytometry ,Cell biology ,Mice, Inbred C57BL ,Mice, Inbred DBA ,biology.protein - Abstract
The light scattering properties of mouse activated macrophages were analyzed by flow cytometry. Peritoneal adherent cells from B. abortus treated animals were found to segregate into two subpopulations as a function of their forward angle and 90 degrees angle light scatter. The cell subpopulations were separated by automatic sorting. The strongly scattering ones contained an elevated proportion of large volume and acid phosphatase rich cells. Their nonspecific cytotoxic activity against tumor cells was more important than that of weakly light scattering cells. Thus, flow cytometry might be helpful to characterize and isolate cytotoxic macrophage populations.
- Published
- 1983
- Full Text
- View/download PDF
45. Development of an HLA-Bw60 Antibody in a Multiparous HLA-Bw61 Positive Woman
- Author
-
G. Dejour, R. Fauchet, J.P. Saleun, and B. Genetet
- Subjects
Proband ,Pregnancy ,biology ,business.industry ,Histocompatibility Testing ,Hematology ,General Medicine ,Human leukocyte antigen ,medicine.disease ,Phenotype ,Antigen ,Antibody Specificity ,HLA Antigens ,Antibody Formation ,Immunology ,biology.protein ,Humans ,Medicine ,Female ,Antibody ,business - Abstract
An HLA-B7 related Bw60 antibody was produced by pregnancy in an HLA-Bw61 positive woman. The 2 specificities reacted with the B7, Bw60 cells of the proband's husband and could be separated by absorption. This report is an additional evidence of the heterogeneity of B40, a complex known to include the antigens Bw60 and Bw61.
- Published
- 1981
- Full Text
- View/download PDF
46. Which are the Parameters to be Controlled in Red Cell Products (Whole Blood, Red Cell Concentrates, Washed Red Cells, Leucocyte Poor Red Cell Concentrates, Frozen Red Cells) in Order that They May be Offered to the Medical Profession as Standardised Products with Specified Properties?
- Author
-
S. N. Swisher, Byron A. Myhre, Harold A. Oberman, Thomas F. Zuck, William L. Bayer, B. Genetet, William Y. Miller, H. H. Gunson, and P. Mannoni
- Subjects
Red Cell ,Order (business) ,business.industry ,Immunology ,Medical profession ,Medicine ,Hematology ,General Medicine ,Food science ,business ,Whole blood - Published
- 1980
- Full Text
- View/download PDF
47. Etude rhéologique et cytologique du sang autologue recueilli par le « Cell Saver 4au cours de césarienne
- Author
-
M.C. Le Goff, J.Y. Le Bervet, M. Duchesne-Gueguen, B. Genetet, R. Tardivel, F. Durand, P. Marcorelles, and J.M. Vovan
- Subjects
Gynecology ,medicine.medical_specialty ,media_common.quotation_subject ,medicine ,General Medicine ,Art ,media_common - Abstract
Resume Depuis une dizaine d'annees, la transfusion autologue peroperatoire a ete frequemment utilisee en chirurgie vasculaire et traumatique. L'extension de cette technique a d'autres domaines semble justifiee quand l'epanchement sanguin peroperatoire est important et que la qualite du sang recueilli est satisfaisante. Afin de juger si la transfusion autologue peroperatoire pouvait s'appliquer en chirurgie obstetricale, nous l'avons etudiee lors de 15 extractions fœtales par cesarienne, le but de ce travail etant d'apprecier la qualite du sang autologue (a differents temps de la manipulation) destine a etre eventuellement transfuse ; ce sang est recueilli et lave par l'appareil « Cell Saver 4(Haemonetics). Le controle de la qualite du sang a ete apprecie : 1) par la mesure des parametres hemorheologiques suivants : etude de la deformabilite erythrocytaire par Erythometrie et Hemorheometrie, mesure des viscosites sanguine et plasmatique, etude de la morphologie des hematies par microscopie electronique a balayage ; 2) par la recherche et l'identification eventuelle d'organismes bacteriens ; 3) par la recherche de cellules fœtales, dont l'injection chez la mere pourrait entrainer certaines complications d'ordre immunologique. Les resultats montrent : 1) peu de variation dans les proprietes de deformabilite du globule rouge avec des taux d'ATP et de 2,3 DPG qui, malgre une diminution, restent dans les limites de la normale ; 2) une augmentation (× 20) de l'hemoglobine plasmatique qui persiste malgre les lavages successifs dans 80 % des cas ; 3) l'existence d'une hemoculture positive a Staphyllococcus epidermidis dans la poche a transfuser, dans 90 % des cas, sans reelle incidence clinique ; 4) la presence d'hematies fœtales (20 % des cas) dans la poche avant transfusion, a un taux proche de 1 % ; 5) la presence de 8 % d'hematies anormales au microscope electronique a balayage (echinocytes de stade I et leger gonflement des hematies) pouvant expliquer leur fragilite. Ces resultats montrent, qu'avant que la transfusion autologue puisse avoir sa place en chirurgie obstetricale, il est necessaire de prendre certaines precautions d'utilisation afin de reduire au maximum les problemes precedemment decrits.
- Published
- 1989
- Full Text
- View/download PDF
48. Which are the Parameters to be Controlled in Red Cell Products (Whole Blood, Red Cell Concentrates, Washed Red Cells, Leucocyte Poor Red Cell Concentrates, Frozen Red Cells) in Order that They May be Offered to the Medical Profession as Standardised Products with Specified Properties?
- Author
-
W.L. Bayer, B. Genetet, P. Mannoni, H.H. Gunson, W.V. Miller, B.A. Myhre, H.A. Oberman, S.N. Swisher, and T.F. Zuck
- Subjects
Hematology ,General Medicine - Published
- 1980
- Full Text
- View/download PDF
49. Anti-Rh Workshop monoclonal antibodies
- Author
-
S Flageul, N. Genetet, D. Bourel, M. Gueguen-Duchesne, M. Lecointre-Coatmelec, J Ferette, and B. Genetet
- Subjects
Erythrocytes ,Rh-Hr Blood-Group System ,business.industry ,medicine.drug_class ,Antibodies, Monoclonal ,Hemagglutination Tests ,Hematology ,General Medicine ,Monoclonal antibody ,Serology ,Antibody Specificity ,Isoantibodies ,Immunology ,Humans ,Medicine ,business - Abstract
39 Monoclonal antibodies (M.Abs) were proposed to be rested in the anti-Rh Group (Group 3). Among these 39 M.Abs, 21 are anti-Rh D, 7 anti-Rh, 4 anti-Rh E, 4 anti-Rh e, 1 anti-Rh c and 2 anti-Rh G. These M.Abs were studied with standard serological techniques against various panels of the Red Blood Cells (RBCs).
- Published
- 1988
- Full Text
- View/download PDF
50. Modification de la résistance osmotique et de la mobilité électrophorétique des hématies au cours de maladies hémolytiques avec anticorps (auto et allo-anticorps)123
- Author
-
Jean-François Stoltz, F. Streiff, C. Vigneron, A. Larcan, B. Genetet, and Raffoux C
- Subjects
Physiology ,Chemistry ,Physiology (medical) - Published
- 1973
- Full Text
- View/download PDF
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