The labeled cRNAs were purified with the RNeasy Mini kit (Qiagen, Hilden, Germany) and quantified using NanoDrop ND-1000 UV-VIS spectrophotometer. Aliquots (600 ng) of Cy3-labeled cRNAs were fragmented and hybridized for 17 h at 65°C to each array using the Gene Expression Hybridization Quisinostat order kit (Agilent Technologies) and according to the manufacturer’s instructions. Microarray imaging and data analysis Slides were washed and processed according to the Agilent 60-mer Oligo Microarray
Processing protocol and scanned on a Agilent microarray scanner G2565BA (Agilent Technologies). Data were extracted from the images with Feature Extraction (FE) software (Agilent Technologies). FE software flags outlier features, and detects and removes spatial gradients and local backgrounds. Data were normalized using a combined rank consistency
filtering with LOWESS intensity normalization. The gene expression values obtained from FE software were imported into GeneSpring 10.0.2 software (Agilent Technologies) for pre-processing and data analysis. For inter-array comparisons, a linear scaling of the data was performed using the 75th percentile signal value of all of non-control probes on the microarray to normalize one-colour signal values. Probe sets with a signal intensity value below the 20th percentile were considered as absent and discarded from subsequent analysis. The expression of each gene was normalized by its median expression across all samples. Genes were included in the final data set if their expression changed by at least twofold between strain H99 FLC-exposed or -not exposed (control sample) in selleck kinase inhibitor at least two independent experiments, together GPX6 with a P-value cut-off of < 0.05 (by one-way analysis of variance [ANOVA] corrected). Genes listed in Table 1 were categorized by reported or putative functions by the BROAD Institute database with NCBI blastP http://www.ncbi.nlm.nih.gov/BLAST/ editing, and also by the Uniprot http://www.uniprot.org/ and Saccharomyces
genome http://www.yeastgenome.org/cgi-bin/blast-sgd.pl databases. As indicated in Table 1, each S. cerevisiae gene name was assigned by blastP search with the C. neoformans H99 gene sequence (e-value cutoff: e-6) according to Kim et al. [24]. Gene Ontology (GO) term analysis was carried to help categorize a list of genes into functional groups. The whole microarray data have been deposited in National Center for 4SC-202 concentration Biotechnology Information’s Gene Expression Omnibus [25] and are accessible through GEO Series accession number GSE24927. Table 1 Changes in the gene expression of C. neoformans H99 cells exposed to FLC BROAD ID (CNAG_*****) C. n. gene name S. c. gene name Description Fold change Ergosterol biosynthesis 04804 SRE1 Sterol regulatory element-binding protein 1 + 4.04 01737 ERG25 C-4 methyl sterol oxidase + 3.95 00854 ERG2 C-8 sterol isomerase + 3.