References of "Touati, Kamal"
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See detailInvestigation on prenatal endocrinology: preliminary results on long term catheterisation of bovine foetuses
Touati, Kamal ULg; Melo de Sousa, Noelita ULg; 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 ULg; Touati, Kamal ULg; 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 ULg; Müller, Philippe ULg; 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 ULg; 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 ULg; 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 ULg; 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 ULg; Delval, Alain; Touati, Kamal ULg 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 ULg; Delval, Alain; Touati, Kamal ULg 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 ULg; 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 ULg; Schwers, Anne; Charlier, Carole ULg et al

in Annales de Médecine Vétérinaire (1992), 136

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See detailMultiplication des embryons chez les bovins: possibilités actuelles et futures
Ectors, Francis ULg; Beckers, Jean-François ULg; Ectors, Fabien ULg et al

in Biotechnologie en Sélection animale - IRSIA (1989)

Since several years, research efforts have been focused towards improving the reproductive potential of domestic animals. The authors present a review of different technics in particular the ... [more ▼]

Since several years, research efforts have been focused towards improving the reproductive potential of domestic animals. The authors present a review of different technics in particular the superovulation and priming, embryo micromanipulation and clonage. The technic of superovulation allows an increase of the total number fo the offspring by an increase of the ovocytes total number. Different FSH injections at the end of the cycle, preceded by small FSH quantity at the beginning of the cycle, procure a great number of mature follicles available for reproduction. Micromanipulation allows a multiplicaton by sectioning the embryo in two or more segments. Isolated blastmeres can also be used but it was observed that those cells very rapidly loose their differentiation potential. Clonage allows the reproduction of an animal from only one of his own cells. The nucleus of this cell is extracted and reimplanted in an enucleated ovocyte. Meanwhile from a practical point of vue, this technic is, at present, only possible using a stem cell and not using a mature somatic cell. [less ▲]

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See detailDemonstrationof somatogenic receptors in bovine corpus luteum: conjectural effect of trophic hormone on follicular growth and development.
Beckers, Jean-François ULg; Wouters-Ballman, P.; Viviers-Donnay, I. et al

Poster (1989, September 09)

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See detailRelation inverse entre la concentration des sérums foetaux bovins en hormone chorionique somatomammotrope et leur âge.
Beckers, Jean-François ULg; Wouters-Ballman, P; Ectors, Fabien ULg et al

in Reproduction Nutrition Development (1989), 29(1), 29

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See detailVitrification of bovine blastocysts
Vanderzwalmen, Pierre ULg; Touati, Kamal ULg; Ectors, Fabien ULg et al

in Theriogenology (1989), 31(1), 270

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See detailLow doses of FSH stimulate follicular growth and maturation in anestrous heifers.
Beckers, Jean-François ULg; Ballman-Wouters, P; Viviers-Donnay, I et al

in Theriogenology (1989)

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See detailVariable composition of bovine fetal calf serum: a prospective study for in vitro oocytes and embryos culture.
Beckers, Jean-François ULg; Ballman-Wouters, P; Ectors, Fabien ULg et al

in Proceedings of the 5th Annual Meeting AETE (1989)

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See detailMaturation et fécondation in vitro chez les bovins: naissance d'un veau
Ectors, Fabien ULg; Van Der Zwalmen, P.; Touati, Kamal ULg et al

in Annales de Médecine Vétérinaire (1989), 133

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