The 6-hydroxydopamine (6OHDA) rat model of parkinsonism is among the first, and most commonly used, animal models of Parkinsons disease. It provides insight into the compensatory changes that occur in the brain after dopamine (DA) neuron degeneration. In order to better define the consequences of substantia nigra DA neuron loss on the neural and glial populations during and following nigrostriatal degeneration, tissue was collected and evaluated from the substantia nigra of 6OHDA or vehicle treated, or nave rats at 1, 2, 4, 6 & 16 weeks.
The longitudinal transcriptomic response of the substantia nigra to intrastriatal 6-hydroxydopamine reveals significant upregulation of regeneration-associated genes.
Sex, Specimen part
View SamplesThe Affymetrix Human Gene 2.0 ST array was used to measure differential expression of RNA isolated from normal and Diamond Blackfan anemia (DBA) erythroid progenitors after ex vivo expansion of circulating, peripheral blood derived hematopoietic stem cells under erythroid growth conditions. The gene-level probe summaries reported in this series were computed using RMA as implemented in the Bioconductor package Oligo v1.36.1.
Molecular convergence in ex vivo models of Diamond-Blackfan anemia.
Specimen part
View SamplesSamples were taken from colorectal cancers in surgically resected specimens in 155 colorectal cancer patients. The expression profiles were determined using Affymetrix Human Genome U133Plus 2.0 arrays. Our MSI/MSS classifier was applied to these samples.
DNA copy-number alterations underlie gene expression differences between microsatellite stable and unstable colorectal cancers.
No sample metadata fields
View SamplesSamples were taken from colorectal cancers in surgically resected specimens from 74 patients. The expression profiles were determined using Affymetrix Human Genome U133Plus 2.0 arrays. Our MSI/MSS classifer was applied to these samples.
DNA copy-number alterations underlie gene expression differences between microsatellite stable and unstable colorectal cancers.
No sample metadata fields
View SamplesDiamond Blackfan anemia is a congenital bone marrow failure syndrome characterized by hypoproliferative anemia, often with associated physical abnormalities. Perturbations of the ribosome appear critically important to the development of DBA, as alterations in 9 different ribosomal protein genes have been identified in multiple unrelated families, along with rarer abnormalities of additional ribosomal proteins. However, presently only 50-60% of patients have an identifiable genetic lesion by ribosomal protein gene sequencing. Using genome-wide SNP array to evaluate for regions of recurrent copy variation, we identified 2 patients with mosaic loss in the region of the the chromosome 5-deleted region involved in somatically-acquired 5q- myelodysplastic syndrome.
Diminutive somatic deletions in the 5q region lead to a phenotype atypical of classical 5q- syndrome.
Sex, Specimen part, Disease, Disease stage, Treatment
View SamplesSamples were taken from colorectal cancers in surgically resected specimens in 290 colorectal cancer patients. The expression profiles were determined using Affymetrix Human Genome U133Plus 2.0 arrays. The training set of our prognosis classifier included the stage A and D samples. Validation used our stage B and C samples.
Metastasis-Associated Gene Expression Changes Predict Poor Outcomes in Patients with Dukes Stage B and C Colorectal Cancer.
No sample metadata fields
View SamplesIn order to better understand signaling events following receptor dimerization involving HER2, we have generated an experimental system in which ErbB dimerization can be controlled.
Trastuzumab has preferential activity against breast cancers driven by HER2 homodimers.
Disease, Cell line, Treatment
View SamplesSamples were taken from surgically resected tumor specimens from patients with proximal colon cancer. The expression profiles were determined using the Affymetrix GeneChip Human Exon 1.0 ST Array version 2. APC gene mutation status was determined using Sanger sequencing. A classifier for APC mutation status was trained using these expression data.
Wild-type APC predicts poor prognosis in microsatellite-stable proximal colon cancer.
Specimen part
View SamplesRecent advances in direct reprogramming using cell type-specific transcription factors provide an unprecedented opportunity for rapid generation of desired human cell types from easily accessible tissues. However, due to the diversity of conversion factors that facilitate the process, an arduous screening step is inevitable to find the appropriate combination(s). Here, we show that under chemically defined conditions minimal pluripotency factors are sufficient to directly reprogram human fibroblasts into stably self-renewing neural progenitor/stem cells (NSCs), but without passing through a pluripotent intermediate stage. These NSCs can be expanded and propagated in vitro without losing their potential to differentiate into various neuronal subtypes and glia. Our direct reprogramming strategy represents a simple and advanced paradigm of direct conversion that will provide an unlimited source of human neural cells for cell therapy, disease modeling, and drug screening.
Small molecules enable OCT4-mediated direct reprogramming into expandable human neural stem cells.
No sample metadata fields
View SamplesCD25+ regulatory T cells develop in the thymus (nTregs), but may also be generated in the periphery upon stimulation of naive CD4 T cells under appropriate conditions (iTregs). The mechanisms that regulate the generation of peripheral iTregs are largely unknown.
Analysis of the transcriptional program of developing induced regulatory T cells.
Specimen part, Treatment, Subject, Time
View Samples