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Genomic copy number alterations as predictive markers of neoadjuvant chemotherapy response in breast cancer

ABSTRACT: Array CGH containing 4,044 human bacterial artificial chromosome clones was used to assess different copy number changes between chemotherapy responsive and non-resposive breast cancer tissues. Keywords: Array CGH

ORGANISM(S): Homo sapiens

PROVIDER: GSE10129 | GEO | 2008/01/17

SECONDARY ACCESSION(S): PRJNA108979

REPOSITORIES: GEO

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Genomic copy number alterations as predictive markers of neoadjuvant chemotherapy response in breast cancer

Project description:Array CGH containing 4,044 human bacterial artificial chromosome clones was used to assess different copy number changes between chemotherapy responsive and non-resposive breast cancer tissues. Array CGH containing 4,044 human bacterial artificial chromosome clones was used to assess different copy number changes between chemotherapy responsive and non-resposive breast cancer tissues.

2010-05-26 | E-GEOD-10129 | biostudies-arrayexpress

Genomic copy number alterations as predictive markers of systemic recurrence in breast cancer

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Genomic copy number alterations as predictive markers of systemic recurrence in breast cancer

Project description:Array CGH containing 4,044 human bacterial artificial chromosome clones was used to assess copy number changes in 31 pairs of clinicopathologically well matched recurred / nonrecurred breast cancer tissues. Array CGH containing 4,044 human bacterial artificial chromosome clones was used to assess copy number changes in 31 pairs of clinicopathologically well matched recurred / nonrecurred breast cancer tissues.

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Genomic copy number alterations as predictive markers in breast cancer

Project description:This SuperSeries is composed of the SubSeries listed below.

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Genomic copy number alterations as predictive markers in breast cancer

Project description:This SuperSeries is composed of the following subset Series: GSE10128: Genomic copy number alterations as predictive markers of systemic recurrence in breast cancer GSE10129: Genomic copy number alterations as predictive markers of neoadjuvant chemotherapy response in breast cancer Refer to individual Series

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Genomic copy number alterations as predictive markers in breast cancer

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DNA copy-number changes

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

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Somatic copy number alterations associated with populations and clinical characteristics in ovarian clear cell adenocarcinoma

Project description:Background: Clinical characteristics of ovarian clear cell adenocarcinoma (CCC) include 1) higher incidence among Japanese, 2) association with endometriosis, 3) poor prognosis in advanced stage, 4) higher incidence of thrombosis as complication. We applied high resolution comparative genomic hybridization (CGH) array to screen somatic copy number alterations (SCNAs) associated with these clinical characteristics. Methods: We conducted a prospective cohort study. DNA obtained from tumors was assayed by array comparative genomic hybridization using Agilent Whole Human Genome 244K.

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