Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcriptome profile of peripheral blood mononuclear cells in patients with type I diabetes and their first grade relatives

ABSTRACT: Type 1 Diabetes (T1D) is considered to be a Th1 autoimmune disease characterised by an absolute lack of insulin caused by an autoimmune destruction of the insulin producing pancreatic beta cells. Th1 lymphocytes are responsible for the infiltration of the islets of Langerhans and for the cytokine release that supports cytotoxic (Tc) lymphocytes to mediate destruction of the beta cells. The preclinical disease stage is characterized by the generation of the self-reactive lymphocytes that infiltrate the pancreas and selectively destroy the insulin-producing beta cells present in the islets. Other cellular immune mechanisms regarding immunoregulation and antigen presentation and processing are involved in T1D pathogenesis as well. Our aim was to identify genes involved in the corresponding signalling cascades, especially those which may serve as promising diagnostic tools for the identification of persons in the prediabetic phase of the disease. We addressed the question by analysing gene expression profiles of freshly isolated peripheral blood mononuclear cells in type 1 diabetes patients, their first degree relatives divided according to their autoantibody status, and healthy controls. 9 T1D-patients versus 10 first degree relatives versus 10 healthy controls

ORGANISM(S): Homo sapiens

SUBMITTER: Katerina Stechova

PROVIDER: E-GEOD-29142 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Healthy first-degree relatives of patients with type 1 diabetes exhibit significant differences in basal gene expression pattern of immunocompetent cells compared to controls: expression pattern as predeterminant of autoimmune diabetes.

Stechova K K Kolar M M Blatny R R Halbhuber Z Z Vcelakova J J Hubackova M M Petruzelkova L L Sumnik Z Z Obermannova B B Pithova P P Stavikova V V Krivjanska M M Neuwirth A A Kolouskova S S Filipp D D

Scandinavian journal of immunology 20120201 2

Expression features of genetic landscape which predispose an individual to the type 1 diabetes are poorly understood. We addressed this question by comparing gene expression profile of freshly isolated peripheral blood mononuclear cells isolated from either patients with type 1 diabetes (T1D), or their first-degree relatives or healthy controls. Our aim was to establish whether a distinct type of 'prodiabetogenic' gene expression pattern in the group of relatives of patients with T1D could be id ...[more]

PMID: 21923738

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Project description:Context: Exercise training is a plausible model for identification of molecular mechanisms that cause metabolic-related changes in human skeletal muscle. Objective: The goal was to explore the molecular basis of the adaptation of skeletal muscle to exercise training. Design and Intervention: Obese male subjects were subjected to an individualized supervised training program targeted in order to optimize lipid oxidation during 8 weeks. Main Outcome Measures: Primary outcome measures were gene expression profiling of skeletal muscle. Body composition, oral glucose tolerance test, Resting metabolic rate, respiratory quotient, maximal oxygen uptake and metabolic biochemistry were also assessed. Overall Design The obese (BMI 30-36) male volunteers (age 32-42) were asked to refrain from vigorous physical activity 48h before presenting to the clinical investigation centre, and ate a weight-maintaining diet consisting of 35% fat, 16% protein, and 49% carbohydrates two days before the experiment. Muscle biopsies of Vastus Lateralis weighing 60–100 mg were obtained using the Bergstrom technique, cleaned and snap-frozen in liquid nitrogen. Resting metabolic rate, respiratory quotient and maximal oxygen uptake were assessed. The subjects were investigated at baseline and after 8 weeks of supervised aerobic exercise training program consisting of daily sessions of 45-60 min of endurance exercise, 5 days a week, at least 48-72h after the last acute exercise bout. Skeletal muscle biopsies were obtained at the beginning and at the end of the protocol. Transcriptome analysis compared 8 subjects before vs. after training using arrays using a common reference design (Cy5 dye was incorporated into all muscle RNA samples, while a reference RNA pool made of the mix of commercial human liver, adipose tissue and skeletal muscle RNA was labelled with Cy3 dye (Applied Biosystems/Ambion, Foster City, USA)( and whole genome 4x44k oligonucleotide arrays (Agilent Technologies).

Dataset Information

Transcriptome profile of peripheral blood mononuclear cells in patients with type I diabetes and their first grade relatives

Publications

Healthy first-degree relatives of patients with type 1 diabetes exhibit significant differences in basal gene expression pattern of immunocompetent cells compared to controls: expression pattern as predeterminant of autoimmune diabetes.

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