Project description:PCR based detection of trisomy 18 and trisomy 21 compared against results obtained by CGH microarrrays in Preimplantation Genetic Screening
Project description:Trisomy mapping has long been a powerful means for assigning genes to chicken microchromosome 16 (GGA16). The major histocompatibility complex (MHC-Y, MHC-B) and CD1 genes were previously assigned to GGA16 by trisomy mapping. Here we combined array comparative genomic hybridization (aCGH) with trisomy mapping to investigate unassigned genomic contigs (temporarily assigned to chrUn_random) by the chicken genome sequencing projects for sequences originating from GGA16. We used the Cornell Trisomy chicken line in our study, as this line contains an extra copy of GGA16 and crosses between these individuals generate disomic, trisomic, and tetrasomic GGA16 offspring. Through the analysis of these individuals with aCGH, we compare signal intensities from unknowns to those expected based on copy number, and putatively assign or reject assignment to GGA16 accordingly.
Project description:41 lung adenocarcinoma from never-smokers hybridized on Illumina SNP arrays on 13 HumanCNV370-Quadv3 chips. High-resolution array comparative genomic hybridization analysis of lung adenocarcinoma in 41 never smokers for identification of new minimal common regions (MCR) of gain or loss. The SNP array analysis validated copy-number aberrations and revealed that RB1 and WRN were altered by recurrent copy-neutral loss of heterozygosity.The present study has uncovered new aberrations containing cancer genes. The oncogene FUS is a candidate gene in the 16p region that is frequently gained in never smokers. Multiple genetic pathways defined by gains of MYC, deletions of RB1 and WRN or gains on 7p and 7q are involved in lung adenocarcinoma in never smokers. A 'Cartes d'Identite des Tumeurs' (CIT) project from the French National League Against Cancer (http://cit.ligue-cancer.net) 41 samples hybridized on Illumina SNP arrays. Submitter : Fabien PETEL petelf@ligue-cancer.net . Project leader : Pr Pierre FOURET pierre.fouret@psl.aphp.fr