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 2024-05-14

Imaging antisense oligonucleotides hybrisisation in vivo with positron emission tomography - Development of positron emitting probes and feasability studies

Objetivo

This project specifically proposes:
i) to develop efficient and general procedures for labelling ODNs of specified sequence with a range of positron-emitting isotopes of differing half-lives.
ii) to demonstrate that specific hybridisation of a positron-emitting probe in vivo combined with image treatment methods will be able to provide the tissue distribution of the target mRNA.

This project aims to combine European expertise to extend PET (Positron Emission Tomography) to an entirely new area: the imaging of antisense oligodeoxynucleotide (ODN) hybridisation to mRNA in humans in vivo. The advance represented by being able to image antisense hybridisation in vivo could be immense. In principle, the PET imaging of any target mRNA could be addressed by merely changing the ODN sequence of the labelled probe and the half-life of the label to suit localisation kinetics. By the use of such positron-emitting antisense probes, genetic factors, such as point mutations, associated with the prognosis of severe or even lethal diseases could be studied in vivo. The method could also be applied to longitudinal studies of the results of grafting, gene therapy and antisense therapy. Exogenous mRNA from viral infection might be detected and its tissue distribution studied. The development of an array of general procedures for labelling antisense ODNs with positronemitters of differing half-life could also be useful to Academia and Pharmaceutical Industry as a procedure for assessing the pharmacokinetics and accumulation of novel antisense therapeutics at target sites in vivo. Diagnostic applications of labelled antisense ODNs could ultimately be envisaged.
Most of the positron-emitting isotopes suitable to the project are currently produced by each of the participating PET centres. Several strategies for labelling ODNs with positron-emitters will be explored. The London Cyclotron Unit of the MRC Clinical Science Centre, and the Groningen PET Centre, who have experience in direct labelling with fluorine-18 at a selected heterocyclic base, will develop chemical methodology to extend these procedures at the ODN level. Other procedures, like labelling at the terminal 5'-position by coupling labelled amino acids, inorganic positron-emitters or iodine- 120 will also be attempted. The CEA PET centre of Orsay, SHFJ, will realise the labelling of fluorobenzyliodoacetamide or bromobenzyliodoacetamide with fluorine- 18 or bromine-76, respectively, and their coupling to ODNs via an intermediate phosphothioate in the 3'-position. Biological models will be conceived to test the labelled ODNs produced by the chemists. The INSERM U.334 unit of Orsay will develop a cellular and a mouse model. The cellular model will be the retina, which offers the advantage of a stratified structure of different cell families and requires small amounts of labelled ODN injected into the eye. The mouse model will consist in a viral infection (Friend's Virus) concentrated in a target organ (the spleen).

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.

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

Université de Paris-Sud XI
Aportación de la UE
Sin datos
Dirección
4,Place du Général Leclerc
91405 Orsay
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 (6)

Mi folleto 0 0