CGHarray profiling of adrenocortical tumors (ACTs)
ABSTRACT: A Cartes dIdentite des Tumeurs (CIT) project from the french Ligue Nationale Contre le Cancer (http://cit.ligue-cancer.net) | IntegraChipTM BAC pangenomic arrays (IntegraGen, Evry, France) : 59 ACTs samples including adrenocortical carcinomas (n=21) and adenomas (n=38) | Submitter : Olivia Barreau | Project leader : Jerome Bertherat .
Project description:To prospectively identify new oncogenes implicated in lung Squamous Cell Carcinoma pathogenesis, we investigated chromosome 3 aberrations in advanced tumours using arrayCGH. Chromosome 3 aberrations are indeed among the most frequent alterations in lung SCC and correlate with SCC patient's poor prognosis. We have precisely mapped regions of recurrent losses at 3p and gains at 3q25-qter in a series of lung SCC (GSE14859) amd moreover uncover 3q26.3-q27 high level amplifications in 20% of tumours. These amplicons were precisely mapped in these tumors using arraCGH with a 3q26.3 dedicated tiling array. Keywords : ArrayCGH, lung Squamous Cell Carcinoma, 3q26.3, SOX2 Keywords: ArrayCGH Profiling of 5 advanced (stage III) lung SCC using a chromosome 3 array providing 3q26.3-q27 tiling coverage. Replicates : each array contains three replicates per clone and each sample is hybridized to two arrays, results are subsequently averaged.
Project description:To prospectively identify new oncogenes implicated in lung Squamous Cell Carcinoma pathogenesis, we investigated chromosome 3 aberrations in advanced tumours using arrayCGH. These aberrations are indeed among the most frequent aberrations in lung SCC and correlate with SCC patient's poor prognosis. We precisely map regions of recurrent losses at 3p and gains at 3q25-qter in a series of lung SCC. We moreover uncover 3q26.3-q27 high level amplifications in 20% of tumours. Keywords: ArrayCGH, Lung Squamous Cell Carcinoma, 3q26.3, SOX2 Profiling of 26 advanced (stage III) lung SCC. Replicates : each tumor sample is hybridized together with a normal dna sample to one microarray. Each microarray contain 3 replicates per BAC clone.
Project description:This SuperSeries is composed of the following subset Series: GSE14859: ArrayCGH mapping of chromosome 3 aberrations in lung Squamous Cell Carcinoma (SCC) GSE14883: SOX2 overexpression effect on human lung squamous cells GSE15079: ArrayCGH mapping of the recurrent 3q26.3-q27mplifications in lung Squamous Cell Carcinoma (SCC) Refer to individual Series
Project description:We have enginereed S. cerevisiae to produce high titers of Artemisinic acid, an anti-malarial drug precursor. Here we compare the gene expression profiles of the producer strain (EPY330) and a strain in which the last enzyme of the pathway (CYP71AV1, AMO) was inactivated by a point mutation (EPY338). 5 independent clones of each strain were precultured and inoculated in galactose-inducing medium for production. Each clone was harvested after 24, 48 and 72h of induction and total RNA was extracted. RNA from replicate clones was pooled in equal proportions and used for labeling and hybridization of 4 or 5 replicate slides for each time point.
Project description:We report the discovery of a beta-glucosidase gene (Pgβglu-1) whose expression underpins natural resistance to a major forest pest, the spruce budworm (SBW) in white spruce (Picea glauca (Voss.) Moench). We performed a microarray experiment to compare resistant (R) and non-resistant (N-R) trees. Pgβglu-1 transcripts levels uniquely were up to 1000 times higher in phenotypically resistant trees and correlated with accumulation of acetophenones compounds that reduce SBW development. These resistance traits were heritable, temporally correlated with the emergence of the most damaging larval stages and were highly variable in the natural population across a large geographic area. The recombinant gene product specifically catalyzed the release of biologically active acetophenones from their glucoside precursors. SBW outbreaks have become more frequent and intense; therefore, the phenotypic diversity resulting from variation in Pgβglu-1 expression may be a key for the adaptability of spruce populations. Transcriptome profiling was carried out with needles from 7 resistant and 7 non-resistant trees (harvested on June 17th, 2010), and 3 samples per tree (n=42) with a custom microarray developed for spruce species and comprising oligonucleotide probes for 23,853 unique P. glauca gene sequences (Raherison et al., 2012).
Project description:The goal of this experiment is to evaluate the potential for utilising this oligonucleotide microarray in other species and genera of the Pinaceae family by using comparative RNA hybridizations in four different spruces (Picea spp), two pines (Pinus spp.) and a larch (Larix laricina), across two tissues, xylem and phelloderm. One-color comparison of 7 conifer species in 2 tissue types: xylem and phelloderm. Between 4 and 28 biological repetitions per sample type, depending on the species, for a total of 142 slides.
Project description:The goal of this experiment is to assess tissue preferential transcript accumulation and fold difference between two tissues that support secondary vascular growth in three spruces: Picea glauca, Picea sitchensis and Picea mariana. Tissues compared are secondary xylem (wood forming tissue located on the internal side of the cambial meristem) and phelloderm (composite sample of the phloem and phelloderm tissues located on the outer side of the cambial meristem). One-color comparison of 3 spruce species in 2 tissue types: xylem and phelloderm. 20 biological repetitions per tissue for Picea glauca and 15 for Picea sitchensis and Picea mariana, for a total of 100 slides.
Project description:A small database of transcription profiles called PgGenExpress was developed from over 150 hybridizations spanning eight major tissue types. In total, transcripts were detected for 92% of the genes on the microarray, in at least one tissue. Non-annotated genes were predominantly expressed at low levels in fewer tissues than genes of known or predicted function. Diversity of expression within gene families may be rapidly assessed from PgGenExpress. In conifer trees, dehydrins and late embryogenesis (LEA) osmotic regulation proteins occur in large gene families compared to angiosperms. Strong contrasts and low diversity was observed in the dehydrin family, while diverse patterns suggested a greater degree of diversification among LEAs. This is a one-color meta-analysis of tissues from 5 separate experiments. There are 8 different tissue types. Each tissue is represented by a variable number of slides, each slide being a biological repetition, for a total of 149 slides.
Project description:B. burgdorferi isolates differ in pathogenicity, and a correlation between RST type and pathogenicity was observed: the most invasive of the isolates are associated with RST1 and the least invasive with RST3 (Wang et al. 2001, Wang et al. 2002, Wormser et al. 1999). Comparative genome hybridization employing custom B. burgdorferi 70mer oligonucleotide microarrays representing all reference strain B31MI ORFs was used to assess genome plasticity, to reveal genes that are conserved and thus may encode essential functions and to reveal elements encoding potential virulence factors in 15 B. burgdorferi isolates (B479, B515, BL206, 297, B376, B379, BL224, B331, B348, B356, B408, B418, B500, JD1, N40) representing all three RST types. Total genomic DNA for each isolate was labeled with cy3 and hybridized simultaneously with cy5-labeled B31MI DNA as reference. Each hybridization was performed in duplicate.<br> Microarray quality was determined by preliminary hybridizations with reference B31MI DNA labeled with both cy3 and cy5. The specificity of the arrays was assessed by cohybridization of cy-3 labeled DNA from strain B314, a B31 derivative lacking linear plasmids (Sadziene et al. 1993), with cy5-labeled B31MI DNA.
Project description:The goal is to identify tissue specific patterns of expression in Picea glauca seedlings One-color comparison of seven tissues of white spruce. Four biological repetitions per tissue (non-related trees), repeated in two channels as technical replicates, for a total of 56 slides.