Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Array-CGH of malignant peripheral nerve sheath tumors (MPNST)

ABSTRACT: Comparison of copy number changes in MPNST samples against benign neurofibromas in NF1 patients 24 MPNSTs and 3 NF samples were hybridised to the human 32K BAC tiling path array

ORGANISM(S): Homo sapiens

SUBMITTER: Meena Upadhyaya

PROVIDER: E-GEOD-16041 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

ACCESS DATA

Publications

Genome-wide high-resolution analysis of DNA copy number alterations in NF1-associated malignant peripheral nerve sheath tumors using 32K BAC array.

Mantripragada Kiran K KK Díaz de Ståhl Teresita T Patridge Chris C Menzel Uwe U Andersson Robin R Chuzhanova Nadia N Kluwe Lan L Guha Abhijit A Mautner Victor V Dumanski Jan P JP Upadhyaya Meena M

Genes, chromosomes & cancer 20091001 10

Neurofibromatosis Type I (NF1) is an autosomal dominant disorder characterized by the development of both benign and malignant tumors. The lifetime risk for developing a malignant peripheral nerve sheath tumor (MPNST) in NF1 patients is approximately 10% with poor survival rates. To date, the molecular basis of MPNST development remains unclear. Here, we report the first genome-wide and high-resolution analysis of DNA copy number alterations in MPNST using the 32K bacterial artificial chromosome ...[more]

PMID: 19603524

Similar Datasets

Project description:Genetic variation is responsible for the generation of phenotypic diversity, including susceptibility to disease. Two major types of variation are known: single nucleotide polymorphisms (SNPs) and a more recently discovered structural variation, involving changes in copy number (CNVs) of kilobase- to megabase-sized chromosomal segments. Variation caused by CNVs has exceeded the amount of SNP-based differences expected to exist between two unrelated humans. Furthermore, many CNVs have been associated with disease predisposition. It is unknown whether CNVs arise in somatic cells, but it is, however, generally assumed that normal cells are genetically identical. Here we show that CNVs are frequent in healthy somatic cells of adult humans. We tested 34 tissue samples from three subjects and, having analyzed for each tissue <10-6 of all cells expected in an adult human, we observed at least six CNVs, affecting a single organ or one or more tissues of the same subject. The CNVs ranged from 82-176 kb, often encompassing known genes, potentially affecting gene function. Our results point to a paradigm shift in the genetics of somatic cells and indicate that humans are commonly affected by somatic mosaicism for stochastic CNVs, which occur in a substantial fraction of cells. A considerable number of phenotypes and diseases affecting humans are a consequence of a somatic process. Thus, our conclusions will be important for the delineation of genetic factors behind these phenotypes. Consequently, biobanks should consider sampling multiple tissues in order to better address mosaicism in the studies of somatic disorders. Furthermore, forensic medicine laboratories should be sensitized to the issue of underestimated frequency of somatic CNV mosaicism. Keywords: copy number variation (CNV), phenotype diversity, somatic cells 31 experiments; each experiment consists of two hybridizations, i.e. regular and dye-swap (62 hybridizations in total); cerebellum from corresponding subject was used as a reference; additionally 12 control self-self hybridizations are included (cerrebellum vs self)

Dataset Information

Array-CGH of malignant peripheral nerve sheath tumors (MPNST)

Publications

Genome-wide high-resolution analysis of DNA copy number alterations in NF1-associated malignant peripheral nerve sheath tumors using 32K BAC array.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets