Project description:Gene expression level in PBLs (peripheral blood leukocytes) could serve as biomarkers for symptomatic knee osteroarthritis (OA). We used microarrays to detail the significant genes that are down/up regulated in OA PBLs by studying both the control and OA groups. We would like to acknowledge NIAMS support through (AR052873 & AR054817) and U01-AR050911.
Project description:The Amish and Hutterites are U.S. farming populations with remarkably similar lifestyles. However, the Amish follow traditional farming practices, while the Hutterites employ modern farming techniques, and also show striking differences in asthma prevalence. Little is known about immune responses underlying these differences. To address this, we obtained genome-wide gene expression data in peripheral blood leukocytes from Amish and Hutterite schoolchildren.
Project description:Gene expression profiling was carried out on peripheral blood leukocytes from 14 healthy older adults. The primary research question is whether gene expression differs in individuals experiencing chronically high levels of social isolation (by UCLA Loneliness Scale) vs chronically low levels of social isolation. Experiment Overall Design: Gene expression profiling was carried out on peripheral blood leukocytes from 14 healthy older adults. The primary research question is whether gene expression differs in individuals experiencing chronically high levels of social isolation (by UCLA Loneliness Scale) vs chronically low levels of social isolation.
Project description:Gene expression profiling was carried out on peripheral blood CD2+ leukocytes from 29 children with asthma. The primary research question is whether gene expression differs in individuals from high socioeconomic status environments vs low socioeconomic status environments. Experiment Overall Design: Gene expression profiling was carried out on peripheral blood CD2+ leukocytes from 29 children with asthma. The primary research question is whether gene expression differs in individuals from high socioeconomic status environments vs low socioeconomic status environments.
Project description:Gene expression profiling was carried out on peripheral blood leukocytes from 14 healthy older adults. The primary research question is whether gene expression differs in individuals experiencing chronically high levels of social isolation (by UCLA Loneliness Scale) vs chronically low levels of social isolation. Keywords: Risk prediction
Project description:Gene expression profiling was carried out on peripheral blood CD2+ leukocytes from 29 children with asthma. The primary research question is whether gene expression differs in individuals from high socioeconomic status environments vs low socioeconomic status environments. Keywords: Risk prediction
Project description:Peripheral blood leukocytes are the most commonly used surrogates to study epigenome-induced risk and epigenomic response to disease related stress. We considered the hypothesis that the TET enzyme catalyzed hydroxymethylation of 5mC to 5hmC might vary among peripheral blood leukocytes and reflect their responsiveness to environment. Reduction in TET1 and/or TET2 activity leads to the over-proliferation of various leukocyte precursors in bone marrow and acute leukemia, yet, the role of 5mC hydroxymethylation in peripheral blood is less well studied. We developed simplified protocols to rapidly and reiteratively isolate mostly non-overlapping leukocyte populations from a single small sample of fresh or frozen whole blood. Among peripheral leukocyte types we found extreme variation in the levels of transcripts encoding proteins involved in cytosine methylation (DNMT1, 3A, 3B) and turnover by de-methylation (TET1, 2, 3) and DNA repair (GADD45a, b, g) and in the gene-region-specific levels of DNA 5hmC (CD4 T cells >> CD14 monocytes > CD16 neutrophils > CD19 B cells > CD56 NK cells > Siglec 8 eosinophils > CD8 T cells). Taken together our results suggest a hierarchy of responsiveness among classes of leukocytes with CD4+ and CD8+ T cells and CD14 monocytes being the most distinctly potentiated for a rapid methylome response to physiological stress and disease. TAB-seq data on 5-hydroxymehtylcytosine (Yu, M. et al. 2012. Cell 149, 1368-1380.) was collected from seven leukocyte types (CD4+ T cells, CD8+ T cells, CD14+ monocytes, CD16+ neutrophils, CD19+ B cells, CD56+ natural killer cells, and Siglec-8+ eosinophils) reiteratively isolated from peripheral blood collected from a healthy male.
Project description:Peripheral blood leukocytes are the most commonly used surrogates to study epigenome-induced risk and epigenomic response to disease related stress. We considered the hypothesis that the TET enzyme catalyzed hydroxymethylation of 5mC to 5hmC might vary among peripheral blood leukocytes and reflect their responsiveness to environment. Reduction in TET1 and/or TET2 activity leads to the over-proliferation of various leukocyte precursors in bone marrow and acute leukemia, yet, the role of 5mC hydroxymethylation in peripheral blood is less well studied. We developed simplified protocols to rapidly and reiteratively isolate mostly non-overlapping leukocyte populations from a single small sample of fresh or frozen whole blood. Among peripheral leukocyte types we found extreme variation in the levels of transcripts encoding proteins involved in cytosine methylation (DNMT1, 3A, 3B) and turnover by de-methylation (TET1, 2, 3) and DNA repair (GADD45a, b, g) and in the gene-region-specific levels of DNA 5hmC (CD4 T cells >> CD14 monocytes > CD16 neutrophils > CD19 B cells > CD56 NK cells > Siglec 8 eosinophils > CD8 T cells). Taken together our results suggest a hierarchy of responsiveness among classes of leukocytes with CD4+ and CD8+ T cells and CD14 monocytes being the most distinctly potentiated for a rapid methylome response to physiological stress and disease.