Objetivo During the project the collaborating laboratories integrated their research in a manner which allowed the investigation of the induction of numerical chromosome changes using mouse/human cell hybrids, hamster and human fibroblasts and human lymphocytes. These cell types were utilized with a variety of protocol variations which included: 1) Time of exposure in the cell cycle 2) Sampling and fixation times The endpoints developed and evaluated for the quantification of the induction of numerical changes included: i) Micronucleus induction, with evaluation of the nature of the chromosomal material using the antikinetochore Crest antibody and centromeric probes ii) Chromosome counts of the whole karyotype iii) Counts of specific chromosomes using whole chromosome paints in metaphase cells and centromeric probes in interphase cells. The results obtained demonstrated that micronuclei may be induced by ionising radiation at doses as low as 0.5Gy of both X-ray and proton irradiation. The micronuclei induced were predominantly kinetochore and centromere negative, indicating that they arose from chromosome structural aberrations. When micronuclei were classified into those arising from structural aberrations and those arising from whole chromosome loss it is clear that both types are induced by ionising radiation in a dose-dependent manner. Ámbito científico ciencias naturalesciencias biológicasgenéticacromosoma Programa(s) FP3-NFS 1 - Research and education programme (Euratom) in the field of nuclear fission safety, 1990-1994 Tema(s) Data not available Convocatoria de propuestas Data not available Régimen de financiación CSC - Cost-sharing contracts Coordinador UNIVERSITY OF WALES SWANSEA Dirección Singleton park SA2 8PP Swansea Reino Unido Ver en el mapa Aportación de la UE Sin datos Participantes (2) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo Consiglio Nazionale delle Ricerche (CNR) Italia Aportación de la UE € 0,00 Dirección Piazzale aldo moro 5 00185 Roma Ver en el mapa Otras fuentes de financiación Sin datos Vrije Universiteit Brussel Bélgica Aportación de la UE € 0,00 Dirección 2,pleinlaan 1050 Bruxelles Ver en el mapa Otras fuentes de financiación Sin datos
