Project description:the protrotophic laboratory strain CEN.PK113-7D (MAT a) was grown in laboratory fermentors with a working volume of 1 litre at dilution rates of 0.02, 0.05, 0.10 (in triplicate), 0.20 (in triplicate), 0.25, and 0.33 per hour (in triplicate). At steady state, samples from each of the 12 continuous cultures were taken and cooled below 2 degree C within ten seconds by mixing 50\% sample and 50\% crushed ice.
Project description:Gene transcription in a set of 49 human primary lung adenocarcinomas and 9 normal lung tissue samples was examined using Affymetrix GeneChip technology. We aimed to investigate differential gene expression between the two tissue types. A total of 3,442 genes, called the set MAD, were found to be either up- or down-regulated by at least two fold between the two phenotypes. Genes assigned to a particular gene ontology term were found, in many cases, to be significantly unevenly distributed between the genes in and outside MAD. Terms that were overrepresented in MAD included functions directly implicated in cancer cell metabolism. Based on their functional roles and expression profiles, genes in MAD were grouped into likely co-regulated gene sets.
Project description:Response of Saccharomyces cerevisiae to Ammonium, L-alanine, or L-glutamine Limitation. The protrotophic laboratory strain CEN.PK113-7D (MAT a) was grown in laboratory fermentors with a working volume of 1 litre at dilution rate (D) of 0.20 per hour (in triplicate for each nitrogen limited condition). At steady state, samples from each of the 12 continuous cultures were taken and cooled below 2 degree C within ten seconds by mixing 40% sample and 60% crushed ice.
Project description:Haemophilus parasuis(HPS) is a prominent swine pathogen that causes Glässer's disease characterized by fibrinous polyserositis, meningitis and arthritis; however, the molecular mechanisms underlying disease pathogenesis remains poorly understood, particularly the host counteraction to HPS invasion by the immune system. Here, we investigated the global expression changes in spleen following HPS infection using the Affymetrix Porcine Genechip.Our findings indicate previously unrecognized gene transcription changes in case of HPS infection in vivo and many presumed cascades in the study are clearly merit further investigation. Our data should provide new clues for immune response in mammals and identification of candidate genes related to HPS resistance. All animal tissue collection procedures were performed according to protocols approved by The Hubei Province, PR China for Biological Studies Animal Care and Use Committee. Piglets at 30 days old were determined to be HPS-free by serum indirect haemagglutination test before artificial bacterial challenges. Each piglet was intratracheally challenged with 5×108 colony-forming units (CFU) per millilitre of HPS strain 0165 (serotype 5) . A total of 5 piglets were challenged, and 5 pigs were used as controls. These two groups were raised in isolated facilities. Six microarrays were used in the experiment, corresponding to the RNAs from spleen tissues of three most severe piglets with fibrinous polyserositis, meningitis and arthritis after HPS infection and three controls.
Project description:Streptococcus suis serotype 2 (SS2), a major swine pathogen and an emerging zoonotic agent, has greatly challenged global public health. Systematical information about host immune response to the infection is important for understanding the molecular mechanism of diseases. Here, we investigated the global expression changes in spleen following SS2 infection using the Affymetrix Porcine Genechip. Our findings indicate previously unrecognized gene transcription changes in case of SS infection in vivo. Our data should provide new clues for immune response in mammals and identification of candidate genes related to SS resistance. All animal tissue collection procedures were performed according to protocols approved by The Hubei Province, PR China for Biological Studies Animal Care and Use Committee. Piglets at 35 days old were determined to be S.suis 2-free by antibody-based ELISA before artificial bacterial challenges. Each piglet was intranasally challenged with 2×106 colony-forming units (CFU) per millilitre of SS2 strain 05ZY or ΔHP0197. A total of 4 piglets were challenged with 05ZY, 4 were challenged with ΔHP0197, and 4 pigs were used as controls. These three groups were raised in isolated facilities. Nine microarrays were used in the experiment, corresponding to the RNAs from spleen tissues of piglets with arthritis after SS2 infection and spleen tissues of piglets with no clinical signs and three controls.
Project description:High-throughput gene expression profiling has become an important tool for investigating transcriptional activity in a variety of biological samples. To date, the vast majority of these experiments have focused on specific biological processes and perturbations. Here, we have generated and analyzed gene expression from a set of samples spanning a broad range of biological conditions. Specifically, we profiled gene expression from 91 human and mouse samples across a diverse array of tissues, organs, and cell lines. Because these samples predominantly come from the normal physiological state in the human and mouse, this dataset represents a preliminary, but substantial, description of the normal mammalian transcriptome. We have used this dataset to illustrate methods of mining these data, and to reveal insights into molecular and physiological gene function, mechanisms of transcriptional regulation, disease etiology, and comparative genomics. Finally, to allow the scientific community to use this resource, we have built a free and publicly accessible website (http://expression.gnf.org) that integrates data visualization and curation of current gene annotations. The terms of the Novartis data release policy prevent us from redistributing .cel files for this experiment, therefore there is no raw data, we hope to be able to release this in future.
Project description:1. Comparison of gene expression profiles of normal prostates and prostates isolated from 4-5 months old PSA-Cre;Pten-loxP/loxP mice<br>2.Comparison of the gene expression profile in the proximal and distal part of normal prostates
Project description:RNA pools were labeled and hybridized to an Affymetrix HG-U133 Plus 2.0 array (Affymetrix, USA). Results derived from untreated OCI-AML cells (sample) were compared to results from OCI-AML treated with TAT-2 (1 mg/mL) for 3 h by comparative analysis with GCOS software. Data were then analyzed using GenePicker software, using a fold change cutoff >1.5 and a p-value of 0.05.
Project description:Each labeled cDNA sample constituted a unique combination of UV dose (2J, 4J or 8J), time point (-30min, 0h, 2h, 4h, 8h and 24h) and photoreactivation status (PR or non-PR) that defined a distinctive matrix point. All samples were hybridized to non-irradiated, non-photoreactivated MDFs of the pertinent time point. As a consequence, the net observed differences in gene expression profiles between treated and non-treated cells depicted only the time-dependent expression profiles of significant gene entries upon a 2J, 4J or 8J of UV-C irradiation and subsequent photoreactivation or not. <br> To allow for the estimation and removal of gene specific dye effects, all samples were reversed labeled during the total RNA reverse transcription step. A pair of self-hybridizations (dye-reversed) preceded each batch of six microarrays. <br> Any deviation from a ratio of 1 (centered to 0 for log ratio data) in self-hybridizations was therefore assigned to either dye effect or residual error. <br> Dye-reversed hybridizations were considered as technical replicates that allowed gene-specific dye effects to be averaged out during clustering while enabled us to <br> exclude dye-dependent variances during the ANOVA analysis. In order to assure a balanced design, the same number of technical dye-reversed replicates was used for all samples and experimental conditions. <br> To account for inherent experimental variation, all samples were each represented by a pool of five <br> (occasionally six) MDF culture dishes that were subjected under identical experimental conditions.