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Affymetrix 6.0 study of sporadic motor neuron disease patients and controls.

ABSTRACT: This data was divided into three experiment sets: 1. A somatic study of sporadic motor neuron disease (SMND) brain samples that were compared to the blood from the same individual, normal control brains and disease control brans (Parkinson Disease patients); 2. A twin study comparing blood and other tissue samples from twins that were discordant for MND, concordant for MND and control twins and 3. A trio study of blood samples MND patients compared to their unaffected parents.

ORGANISM(S): Homo sapiens

PROVIDER: GSE15826 | GEO | 2010/07/31

SECONDARY ACCESSION(S): PRJNA116749

REPOSITORIES: GEO

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Affymetrix 6.0 study of sporadic motor neuron disease patients and controls.

Project description:This data was divided into three experiment sets: 1. A somatic study of sporadic motor neuron disease (SMND) brain samples that were compared to the blood from the same individual, normal control brains and disease control brans (Parkinson Disease patients); 2. A twin study comparing blood and other tissue samples from twins that were discordant for MND, concordant for MND and control twins and 3. A trio study of blood samples MND patients compared to their unaffected parents. Study 1: 36 sporadic motor neuron disease brain (lateral frontal cortex, Brodmann area 46), 34 matched sporadic motor neuron disease blood, 26 control brain (lateral frontal cortex, Brodmann area 46), 9 Parkinson Disease brain (disease controls, lateral frontal cortex, Brodmann area 46). Study 2 and study 3: 52 twin or trio blood, 4 twin hair, 1 twin sperm. 2 replicate twin blood and 1 replicate trio blood repeated at a different time. External control blood from Coriell GM15510 and GM10851.

2010-07-31 | E-GEOD-15826 | biostudies-arrayexpress

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Altered DNA methylation profiles in blood from patients with sporadic Creutzfeldt-Jakob disease

Project description:Prion diseases are fatal and transmissible neurodegenerative disorders caused by the misfolding and aggregation of prion protein. Although recent studies have implicated epigenetic variation in common neurodegenerative disorders, no study has yet explored their role in human prion diseases. Here we profiled genome-wide blood DNA methylation in the most common human prion disease, sporadic Creutzfeldt-Jakob disease (sCJD). Our case-control study (n=219), when accounting for differences in cell type composition between individuals, identified 38 probes at genome-wide significance (p < 1.24x10-7). Nine of these sites were taken forward in a replication study, performed in an independent case-control (n=186) cohort using pyrosequencing. Sites in or close to FKBP5, AIM2 (2 probes), UHRF1, KCNAB2, PRNP, ANK1 successfully replicated. The blood-based DNA methylation signal was tissue- and disease-specific, in that the replicated probe signals were unchanged in case-control studies using sCJD frontal-cortex (n=84), blood samples from patients with Alzheimer’s disease, and from inherited and acquired prion diseases. Machine learning algorithms using blood DNA methylation array profiles accurately distinguished sCJD patients and controls. Finally, we identified sites whose methylation levels associated with prolonged survival in sCJD patients. Altogether, this study has identified a peripheral DNA methylation signature of sCJD with a variety of potential biomarker applications.

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Project description:High throughput sequencing of coding exome RNA from cingylate gyrus brain tissue obtained from control- and Parkinson´s disease patients. In the Parkinson´s disease affected tissue, changes are present that are known to be related to the pathogenesis of neurodegenerative diseases.

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Whole Blood RNA Expression in Pink1-/- and Wildtype Rats

Project description:Early-onset pathology and reliable disease biomarkers for diagnostics are poorly understood for progressive degenerative disorders such as Parkinson disease (PD). PD is the second most common age-related degenerative disorder. The Pink1-/- rat is a mitochondrial dysfunction model of prodromal PD. In this study, we used RNA sequencing to examine gene expression within whole blood samples of young and old Pink1-/- rats as compared to age-matched wildtype controls.

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