This dataset contains microarray data from normal controls (aged 20-99 yrs) and Alzheimer's disease cases, from 4 brain regions: hippocampus, entorhinal cortex, superior frontal cortex, post-central gyrus. Changes in expression of synaptic and immune related genes were analyzed, investigating age-related changes and AD-related changes, and region-specific patterns of change.
Gene expression changes in the course of normal brain aging are sexually dimorphic.
Sex, Subject
View SamplesThis dataset of cognitively normal controls is a subset of the GSE48350 dataset, which additionally contains microarray data from AD brains.
Gene expression changes in the course of normal brain aging are sexually dimorphic.
Sex, Subject
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Maternal influences on the transmission of leukocyte gene expression profiles in population samples from Brisbane, Australia.
Sex, Age, Specimen part
View SamplesThis is a companion study to (GSE21342). Peripheral blood leukocyte samples were obtained with consent from 100 red cross blood donors sampled cross-sectionally across the city of Brisbane, Australia. After correction for RNA integrity values, individuals fall into major profiles of expression variation suggesting environmental and cultural influences on immune gene expression.
Maternal influences on the transmission of leukocyte gene expression profiles in population samples from Brisbane, Australia.
Sex, Age
View SamplesThis study contrasts the expression profiles of peripheral blood leukocytes from third trimester pregnant mothers, with cord blood leukocytes from their newborn children. It is a companion to (GSE21311). After normalization for RNA integrity, major principal components of the variation were found to distinguish individuals. Transmission of gene expression profiles from mother to child was documented, along with differences between gestational diabetic, obese, and normal weight mothers and their children.
Maternal influences on the transmission of leukocyte gene expression profiles in population samples from Brisbane, Australia.
Specimen part
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Modeling a lethal prostate cancer variant with small-cell carcinoma features.
Specimen part, Disease
View SamplesPurpose: Small-cell prostate carcinoma (SCPC) morphology predicts for a distinct clinical behavior, resistance to androgen ablation, and frequent but short responses to chemotherapy. The model systems we report reflect the biology of the human disease and can be used to improve our understanding of SCPC and to develop new therapeutic strategies for it.
Modeling a lethal prostate cancer variant with small-cell carcinoma features.
Specimen part
View SamplesIn order to identify transcript changes in response to DEF , we used human macrophages with or without DEF treatment. In order to study the effect of iron chelation on LPS-polarized macrophage transcriptome, we exposed DEF-treated or control macrophages to short time exposure to LPS. We then performed whole-genome transcriptome sequencing by RNA-sequencing (RNA-seq). Overall design: Macrophages from 3 healthy donors were either treated with DEF (500 µM - designated as DEF) or left unstimulated (CONTROL). LPS treatment (100 ng/ml, 3 hours) was performed in cells with DEF (designated as LPS+DEF) or without (LPS). RNA-seq was performed on Illumina Hiseq 2500
Acute Iron Deprivation Reprograms Human Macrophage Metabolism and Reduces Inflammation In Vivo.
Specimen part, Treatment, Subject
View SamplesA fundamental challenge in the post-genome era is to understand and annotate the consequences of genetic variation, particularly within the context of human tissues. We describe a set of integrated experiments designed to investigate the effects of common genetic variability on DNA methylation, mRNA expression and microRNA (miRNA) expression in four distinct human brain regions. We show that brain tissues may be readily distinguished based on methylation status or expression profile. We find an abundance of genetic cis regulation mRNA expression and show for the first time abundant quantitative trait loci for DNA CpG methylation. We observe that the largest magnitude effects occur across distinct brain regions. We believe these data, which we have made publicly available, will be useful in understanding the biological effects of genetic variation.
Abundant quantitative trait loci exist for DNA methylation and gene expression in human brain.
Sex, Age, Specimen part
View SamplesTranscriptional dysregulation is an early feature of Huntington''s disease (HD). We observed gene-specific changes in H3K4me3 at transcriptionally repressed promoters in R6/2 mouse and human HD brain. Genome-wide analysis showed a novel chromatin signature for this mark. Reducing the levels of the H3K4 demethylase SMCX/Jarid1c in primary neurons reversed down-regulation of key neuronal genes caused by mutant Huntingtin (Htt) expression. Finally, reduction of SMCX/Jarid1c in primary neurons from BACHD mice or the single Jarid1 in a Drosophila HD model was protective. Therefore, targeting this epigenetic signature may be an effective strategy to ameliorate the consequences of HD. Overall design: mRNA-seq in wild type and R6/2 cortex and striatum at 8 and 12 weeks.
Targeting H3K4 trimethylation in Huntington disease.
Age, Specimen part, Subject
View Samples