Skip to main content
Ir a la página de inicio de la Comisión Europea (se abrirá en una nueva ventana)
español es
CORDIS - Resultados de investigaciones de la UE
CORDIS
Contenido archivado el 2024-04-15

THE DEVELOPMENT OF TRANSGENIC ANIMALS (INCLUDING FISH) WITH NOVEL CHARACTERISTICS

Objetivo

THE POSSIBILITY TO ALTER THE GENETICS OF DOMESTIC ANIMALS AND FISH IN A PREDICTABLE MANNER IS CLEARLY VERY ATTRACTIVE :

- SCIENTIFICALLY, THIS RESEARCH SHOULD CONTRIBUTE TO A BETTER UNDERSTANDING OF A FOREIGN GENE IN THE GERM LINE OF ANIMALS.
- TECHNICALLY, IT SHOULD IMPROVE THE PRACTICAL METHODS OF TRANSFER.
- ECONOMICALLY, IT SHOULD PROVIDE A SHORT CUT FOR THE IMPROVEMENT OF THE GENETICS OF ANIMALS, FOR INSTANCE IN OBTAINING ANIMALS GROWING AT A FASTER RATE. IT ALSO SHOULD PROVIDE METHODS TO PREPARE MASSIVELY PROTEINS OF HIGH VALUE THROUGH MILK OF BLOOD OF TRANSGENIC ANIMALS.
Regulatory sequence from several rabbit milk protein genes have been identified. One of them, from the WAP gene (whey acidic protein) is highly efficient to direct the expression of foreign genes in the mammary gland. The rabbit WAP gene promotor has been patented. Several recombinant proteins of pharmaceutical interest have been produced in the milk of transgenic mice and rabbits (human and bovine growth hormones, EC superoxide dismutase, erythropoietin) some of them at a high level. Several litres of rabbit milk have been collected for some of the proteins. Vectors optimized for the expression of foreign genes in the mammary gland are prepared. Transgenic rabbits used as models in biomedical studies have been obtained (AIDS, atherosclerosis) and others are being prepared. In addition methods to obtain transgenic trout have been defined and promotors working in fish cells have been determened.

Genetic characteristics of domestic animals can be rapidly modified through the transfer of deoxyribonucleic acid (DNA) to fertilized ova and the development of transgenics. Biological fluids (milk, blood, egg white, etc) of transgenic animals can be an abundant source of well matured proteins of clinical and veterinary interest. These goals can be reached if specific genes, promoters and vectors are prepared, and if methods to obtain transgenic animals in various species are defined.

Recombinant genes containing different promoters and growth hormone genes were prepared and tested in cultured mammalian and fish cells and in whole transgenic salmonids. Most of the regulatory elements from mammalian genes when tested in fish cells or in fish worked only on low levels. Fish genepromoters seem to be a better choice for the future. Several fish genes were cloned and characterized. Rabbit milk and bovine complementary deoxyribonucleic acid (cDNA) and genes were isolated and sequenced. Recombinant genes containing milk gene or bovine liver gene promoters and reporter genes were expressed in mammary cells in vitro and in transgenic mice. Retroviral vectors from birds were prepared. These vectors harbouring foreign genes transfer efficiently to chickens. Conditions were established for the efficient recovery of fertilized bovine ova, their microinjection, in vitro culture and transfer to recipients, with a high rate of survival. Finally, protocols were established for efficient generation of transgenic fish.
TWO STRATEGIES WILL BE USED TO INTRODUCE A NUMBER OF GENES INTO THE GERM LINE OF THE ANIMALS :

- MICROINJECTION OF DNA,
- DELIVERY OF THE DNA BY RETROVIRUSES.

THREE GENES ARE ALREADY AVAILABLE : MOUSE METALLOTHINEIN, AND THE MMTV AND SV40 PROMOTERS. IT IS PROPOSED TO CLONE PROMOTERS FOR : HIGH LEVEL OF CALF PROTEIN SEQUENCE, HIGH LEVEL OF A SALMON PROTEIN SEQUENCE, THE RABBIT CASEIN PROMOTER AND THE SALMON AND BOVINE GROWTH HORMONE PROMOTERS.

Ámbito científico (EuroSciVoc)

CORDIS clasifica los proyectos con EuroSciVoc, una taxonomía plurilingüe de ámbitos científicos, mediante un proceso semiautomático basado en técnicas de procesamiento del lenguaje natural. Véas: El vocabulario científico europeo..

Para utilizar esta función, debe iniciar sesión o registrarse

Programa(s)

Programas de financiación plurianuales que definen las prioridades de la UE en materia de investigación e innovación.

Tema(s)

Las convocatorias de propuestas se dividen en temas. Un tema define una materia o área específica para la que los solicitantes pueden presentar propuestas. La descripción de un tema comprende su alcance específico y la repercusión prevista del proyecto financiado.

Datos no disponibles

Convocatoria de propuestas

Procedimiento para invitar a los solicitantes a presentar propuestas de proyectos con el objetivo de obtener financiación de la UE.

Datos no disponibles

Régimen de financiación

Régimen de financiación (o «Tipo de acción») dentro de un programa con características comunes. Especifica: el alcance de lo que se financia; el porcentaje de reembolso; los criterios específicos de evaluación para optar a la financiación; y el uso de formas simplificadas de costes como los importes a tanto alzado.

CSC - Cost-sharing contracts

Coordinador

Institut National de la Recherche Agronomique (INRA)
Aportación de la UE
Sin datos
Dirección
11 rue Jean Nicot
75007 Paris
Francia

Ver en el mapa

Coste total

Los costes totales en que ha incurrido esta organización para participar en el proyecto, incluidos los costes directos e indirectos. Este importe es un subconjunto del presupuesto total del proyecto.

Sin datos

Participantes (3)

Mi folleto 0 0