Please note that we have stopped the regular imports of Gene Expression Omnibus (GEO) data into ArrayExpress. This may not be the latest version of this experiment.

E-GEOD-14960 - Affymetrix SNP array data for low-grade astrocytoma samples

Submitted on 23 February 2009, released on 9 April 2010, last updated on 4 May 2014
Homo sapiens
Samples (23)
Array (1)
Protocols (6)
Copy number analysis of 21 paediatric low-grade astrocytomas identified a discrete copy number gain of 1.9Mb in chromosome band 7q34. The gain was present in 12/14 cerebellar pilocytic astrocytomas. Subsequent analysis of tumour cDNA indentified a novel gene fusion between KIAA1549 and BRAF in these tumours. Copy number analysis of 21 paediatric low-grade astrocytomas using the Affymetrix GeneChip Human Mapping 250K Nsp Array. This study comprised 14 pilocytic astrocytomas, 4 diffuse astrocytomas, one pilomyxoid astrocytoma, one pilomyxoid glioma and one pleomorphic xanthoastrocytoma. Tumours were compared to the mean of two normal male DNA controls.
Experiment types
genotyping by array, comparative genomic hybridization by array 
Tim Forshew <>, Andrew R Lawson, Bryan D Young, David W Ellison, Denise Sheer, Ruth G Tatevossian, Tracy Chaplin
Activation of the ERK/MAPK pathway: a signature genetic defect in posterior fossa pilocytic astrocytomas. Forshew T, Tatevossian RG, Lawson AR, Ma J, Neale G, Ogunkolade BW, Jones TA, Aarum J, Dalton J, Bailey S, Chaplin T, Carter RL, Gajjar A, Broniscer A, Young BD, Ellison DW, Sheer D.