Project description:This study includes the whole-genome screening of unbalanced chromosomal rearrangements (copy-number variants; CNV) in children with ID/DD, ASD and MCA. We identified a broad range of pathogenic/likely pathogenic CNVs as well as variants of unclear significance and likely benign variants. Our results confirm the benefit of array-CGH in the current clinical genetic diagnostics through the identification of genetic cause of ID/DD in the high proportion of affected children.
Project description:This study includes the whole-genome screening of unbalanced chromosomal rearrangements (copy-number variants; CNV) in children with ID/DD, ASD and MCA. We identified a broad range of pathogenic/likely pathogenic CNVs as well as variants of unclear significance and likely benign variants. Our results confirm the benefit of array-CGH in the current clinical genetic diagnostics through the identification of genetic cause of ID/DD in the high proportion of affected children.
Project description:This study includes the whole-genome screening of unbalanced chromosomal rearrangements (copy-number variants; CNV) in children with ID/DD, ASD and MCA. We identified a broad range of pathogenic/likely pathogenic CNVs as well as variants of unclear significance and likely benign variants. Our results confirm the benefit of array-CGH in the current clinical genetic diagnostics through the identification of genetic cause of ID/DD in the high proportion of affected children.
Project description:This study includes the whole-genome screening of unbalanced chromosomal rearrangements (copy-number variants; CNV) in children with ID/DD, ASD and MCA. We identified a broad range of pathogenic/likely pathogenic CNVs as well as variants of unclear significance and likely benign variants. Our results confirm the benefit of array-CGH in the current clinical genetic diagnostics through the identification of genetic cause of ID/DD in the high proportion of affected children.
Project description:This study includes the whole-genome screening of unbalanced chromosomal rearrangements (copy-number variants; CNV) in children with ID/DD, ASD and MCA. We identified a broad range of pathogenic/likely pathogenic CNVs as well as variants of unclear significance and likely benign variants. Our results confirm the benefit of array-CGH in the current clinical genetic diagnostics through the identification of genetic cause of ID/DD in the high proportion of affected children.
Project description:This study includes the whole-genome screening of unbalanced chromosomal rearrangements (copy-number variants; CNV) in children with ID/DD, ASD and MCA. We identified a broad range of pathogenic/likely pathogenic CNVs as well as variants of unclear significance and likely benign variants. Our results confirm the benefit of array-CGH in the current clinical genetic diagnostics through the identification of genetic cause of ID/DD in the high proportion of affected children.
Project description:This study includes the whole-genome screening of unbalanced chromosomal rearrangements (copy-number variants; CNV) in children with ID/DD, ASD and MCA. We identified a broad range of pathogenic/likely pathogenic CNVs as well as variants of unclear significance and likely benign variants. Our results confirm the benefit of array-CGH in the current clinical genetic diagnostics through the identification of genetic cause of ID/DD in the high proportion of affected children.
Project description:Products of conception that were diagnosed either euploid or aneuploid during routine cytogenetic analysis were analysed by a novel CGH+SNP array for the evaluation of its usefulness in clinical diagnostics.
Project description:Gene amplifications and deletions frequently contribute to tumorigenesis. Characterization of these DNA copy-number changes is important for both the basic understanding of cancer and its diagnosis. Comparative genomic hybridization (CGH) was developed to survey DNA copy-number variations across a whole genome. With CGH, differentially labelled test and reference genomic DNAs are co-hybridized to normal metaphase chromosomes, and fluorescence ratios along the length of chromosomes provide a cytogenetic representation of DNA copy-number variation. CGH, however, has a limited ( approximately 20 Mb) mapping resolution, and higher-resolution techniques, such as fluorescence in situ hybridization (FISH), are prohibitively labour-intensive on a genomic scale. Array-based CGH, in which fluorescence ratios at arrayed DNA elements provide a locus-by-locus measure of DNA copy-number variation, represents another means of achieving increased mapping resolution. Published array CGH methods have relied on large genomic clone (for example BAC) array targets and have covered only a small fraction of the human genome. cDNAs representing over 30,000 radiation-hybrid (RH)-mapped human genes provide an alternative and readily available genomic resource for mapping DNA copy-number changes. Although cDNA microarrays have been used extensively to characterize variation in human gene expression, human genomic DNA is a far more complex mixture than the mRNA representation of human cells. Therefore, analysis of DNA copy-number variation using cDNA microarrays would require a sensitivity of detection an order of magnitude greater than has been routinely reported. We describe here a cDNA microarray-based CGH method, and its application to DNA copy-number variation analysis in breast cancer cell lines and tumours. This study is described more fully in Pollack JR et al.(1999) Nat Genet 23:41-6 Keywords: other
Project description:In the study, researchers investigated acral melanomas, particularly subungual melanomas (SUM), which are primarily characterized by whole genome copy number variations (CNV) such as amplifications, gains, and losses. Previous research has utilized various cytogenetic or molecular analyses ranging from targeted methods focused on specific genes to comprehensive whole genome and whole transcriptome sequencing techniques. To differentiate between malignant and benign lesions, fluorescence in situ hybridization (FISH) methods have been commonly employed, utilizing probes targeting genes like CCND1, RREB1, MYB, CDKN2A, or MYC either individually or in combination.In this study a Comparative Genomic Hybridization on array (array-CGH) was performed to detect whole genome CNV. This approach aimed to improve the classification of malignant and benign lesions in a cohort consisting of 31 SUM cases and 8 subungual lentiginous melanocytic proliferations with or without atypia.
