References of "Touati, Kamal"
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See detailEvaluation of the treatment of septic arthritis by arthrotomy in calves
Sartelet, Arnaud ULiege; Touati, Kamal ULiege

Conference (2008, July 10)

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See detailCongenital muscular dystony in the Belgian Blue breed
Rollin, Frédéric ULiege; Vandeputte, Sébastien ULiege; Guyot, Hugues ULiege et al

Conference (2008)

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See detailRadioimmunoassay of bovine placental lactogen using recombinant and native preparations: determination of fetal concentrations across gestation
Alvarez-Oxiley, A. V.; Melo de Sousa, Noelita ULiege; Hornick, Jean-Luc ULiege et al

in Reproduction, Fertility and Development (2007), 19(7), 877-885

Concentrations of bovine placental lactogen ( bPL) were determined in fetal plasma samples by twelve double-antibody competitive radioimmunoassay systems ( RIA I - XII) based on either recombinant bPL ... [more ▼]

Concentrations of bovine placental lactogen ( bPL) were determined in fetal plasma samples by twelve double-antibody competitive radioimmunoassay systems ( RIA I - XII) based on either recombinant bPL ( non- glycosylated) or native bPL ( glycosylated). Both preparations were used as standard and tracer, and for primary antisera production. The minimum detection limit measured by these RIA varied from 0.02 to 0.6 ng bPLmL(-1). The coefficients of correlation of different bPL RIA systems were up to 90% ( P< 0.0001) when each RIA was tested against the average values of all twelve RIA systems. All developed RIA were used to investigate the incidence of different bPL isoforms in bovine fetal serum samples ( n= 71). Fetal concentrations ranged from 11.8 to 35.7 ng mL(-1) at the third month and from 1.1 to 13.5 ngmL(-1) at the ninth month of gestation. They tended to decrease with advancing gestation. In general, those RIA systems that used recombinant bPL as the standard measured higher values than those using the native bPL preparation. These differences decreased toward the end of gestation ( P< 0.05), suggesting a lower rate of glycosylation. Our results provide evidence of different glycosylated isoforms of bPL in fetal serum at different gestation periods. [less ▲]

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See detailCombined spastic paresis of both gastrocnemius and femoral quadriceps muscles in Belgian blue calves
Janda, Jozef; Uyttenhoef, Aude; Vandeputte, Sébastien ULiege et al

Conference (2006)

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See detailEndocrinology of pregnancy in the cow: embryonic signals, placental hormones and proteins
Ayad, A.; Melo de Sousa, Noelita ULiege; Hornick, Jean-Luc ULiege et al

in Annales de Médecine Vétérinaire (2006), 150(4), 212-226

The development, the establishment and the embryonic survival at early stages of gestation are depending on an intimate dialogue between the embryo and his mother. For the embryo part, it is especially ... [more ▼]

The development, the establishment and the embryonic survival at early stages of gestation are depending on an intimate dialogue between the embryo and his mother. For the embryo part, it is especially the trophoblast, or the future placenta, which plays a key role in initializing pregnancy. The placenta emits many signals of various chemical natures ( steroids, prostaglandins, peptides, proteins), some of them, e. g. the interferon tau, determine the maintenance of the corpus luteum at the beginning of gestation. Until now, although having raised many speculations, the earliest of these signals were not identified in peripheral circulation. Consequently, they cannot be used as a pregnancy diagnosis or to indicate embryonic mortality. However, since the eighties, the specific proteins "associated with pregnancy", produced by the trophoblastic cells are used as tool for breeding management. Most of these molecules are present in peripheral circulation. In this review, we will describe the major mechanisms associated with the maternal recognition of the gestation and their possible applications as pregnancy diagnosis tool in the cow. [less ▲]

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See detailCannulation of bovine fetuses for a long period blood collection: the chirurgical approach
Touati, Kamal ULiege; Melo de Sousa, Noelita ULiege; Van der Weijden, G. C. et al

in Proceedings: 24th World Buiatrics Congress (2006)

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See detailEmergence of bovine Ehrlichiosis in Belgium
Guyot, Hugues ULiege; Vandeputte, Sébastien ULiege; Sandersen, Charlotte ULiege et al

Conference (2005)

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See detailRadioimmunoassay of bovine placental lactogen (bPL) using an antiserum raised in guinea pigs: measurement in foetal plasma
Alvarez-Oxiley, A. V.; Melo de Sousa, Noelita ULiege; Touati, Kamal ULiege et al

in Reproduction (Cambridge, England). Abstract Series (2004), 31

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See detailInvestigation on prenatal endocrinology: preliminary results on long term catheterisation of bovine foetuses
Touati, Kamal ULiege; Melo de Sousa, Noelita ULiege; Gangl, M. et al

in Reproduction (Cambridge, England). Abstract Series (2004), 31

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See detailEmbryonic signals and pregnancy diagnosis in ruminants
Beckers, Jean-François ULiege; Touati, Kamal ULiege; Alvarez-Oxiley, A. V. et al

in Reproduction in Domestic Animals (2004), 39(4), 252

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See detailLa parésie spastique du quadriceps fémoral : Une nouvelle entité clinique chez le veau de race Blanc Bleu Belge.
Touati, Kamal ULiege; Müller, Philippe ULiege; Gangl M. et al

in Annales de Médecine Vétérinaire (2003), 147

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See detailInsémination artificielle et transfert embryonnaire pour limiter la dissémination des maladies contagieuses chez les animaux de rente.
Gonzalez, F; Cabrera, F; Rodriguez, N et al

Conference (2003, November)

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See detailTrophoblastic disregulations in pregnancies resulting from transfer of cloned embryos in the bovine species
Ectors, Fabien ULiege; Delval, A.; Smith, Lawrence et al

in 12e Colloque Scientifique de l'Association Européenne du Transfert Embryonnaire (1996)

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See detailViability of cloned bovine embryos after one or two cycles of nuclear transfer and in vitro culture
Ectors, Fabien ULiege; Delval, Alain; Smith, Lawrence et al

in Theriogenology (1995), 44

We described an exclusively in vitro procedure for cloning and recloning bovine embryos. Embryos obtained by IVM/IVF/IVC developed to the morula stage were used as blastomere donors in cunjunction with ... [more ▼]

We described an exclusively in vitro procedure for cloning and recloning bovine embryos. Embryos obtained by IVM/IVF/IVC developed to the morula stage were used as blastomere donors in cunjunction with IVM recipient oocytes. Reconstructed embryos were developed in vitro in co-culture using bovine oviductal epithelial cells. The resulting morulae were used as donors for recloning under the same experimental conditions. No significant difference was observed between cloning and recloning in terms of development (rates of blastocysts: 12.9 versus 14.9%), in the number of nuclei per blastocyst (63.8 versus 49.1), or in pregnancy rates (35.7 versus 33.3%). The high variability observed between replicates and the correlation between results in first and second cycle nuclear transfer may suggest an inherant potential of individual donor embryos to support development by cloning [less ▲]

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See detailLe point sur la production d’embryons in vitro: limitations et perspectives de la recherche
Thonon, Fabienne; Ectors, Fabien ULiege; Delval, Alain et al

in Annales de Médecine Vétérinaire (1994), 138(1), 33-40

Recent progress in gamete biology and early embryo development was responsible for great evolution of reproduction techniques in farm animals. Among these techniques, in vitro production of bovine embryos ... [more ▼]

Recent progress in gamete biology and early embryo development was responsible for great evolution of reproduction techniques in farm animals. Among these techniques, in vitro production of bovine embryos was developed from slaughterhouse ovaries. This method has been used for individual animals. However, large variations in results were observed, due to several factors, including reproductive state and age of the donor. Inspite of this limitation, in vitro production of bovine embryos may be helpful, when slaughtering of valuable cows is recommended eg for brucellosis disease. Researches are purchased in order to increase the number of oocytes obtained per "elite" cow and to improve the ability of in vitro embryos to support freezing. [less ▲]

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See detailClonage par greffe de blastomère: naissance d'un premier veau
Ectors, Fabien ULiege; Delval, Alain; Touati, Kamal ULiege et al

in Annales de Médecine Vétérinaire (1993), 137(8), 573-574

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See detailClonage par transfert de noyau dans l'espèce bovine: premiers résultats
Ectors, Fabien ULiege; Delval, Alain; Touati, Kamal ULiege et al

in Annales de Médecine Vétérinaire (1993), 137(6), 427-431

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See detailComparison between culture of bovine embryos in vitro versus development in rabbit oviducts and in vivo
Ectors, Fabien ULiege; Thonon, Fabienne; Delval, Alain et al

in Livestock Production Science (1993), 36

The aim of this work was to evaluate the efficiency of different embryo culture methods for in vitro embryo production: development in co-culture with bovine oviductal epithelial cells (BOEC), in BOEC ... [more ▼]

The aim of this work was to evaluate the efficiency of different embryo culture methods for in vitro embryo production: development in co-culture with bovine oviductal epithelial cells (BOEC), in BOEC conditioned medium (CM) or in rabbit oviducts, versus in vivo produced embryos. There was no significant difference in terms of percentages of cleaved and 8-cell stages obtained between CM and BOEC. In CM, 24.8% of the cleaved embryos became blastocysts. In BOEC, 14.5% of the cleaved embryos became blastocysts. Among the 190 zygotes transferred in the rabbit oviducts, 127 have been recovered 5 days later, and 17.4% became blastocysts. There was no significant difference in term of blastocyst formation between the development in rabbit and in BOEC. However, there was a significant difference between the CM group and the two other groups. The numbers of cells in blastocysts from different sources were investigated: in vivo blastocysts contained 107 cells assumed to be 100%, in vitro blastocysts developed in rabbit oviduct 100.1 cells (93.3%), BOEC blastocysts 90.8 cells (84.6%) and CM blastocysts 72.3 cells (67.3%). This study confirmed earlier works on the oviduct effect on blastocyst quality in terms of development rate and cell number. [less ▲]

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See detailLe sexage d'embryons bovins par la technique de l'amplification en chaîne par la polymérase (acp) d'une séquence Y-spécifique bovine
Grobet, Luc ULiege; Schwers, Anne; Charlier, Carole ULiege et al

in Annales de Médecine Vétérinaire (1992), 136

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