The mammalian brain is complex, with multiple cell types performing a variety of diverse functions, but exactly how each cell type is affected in aging remains largely unknown. Here we performed a single-cell transcriptomic analysis of young and old mouse brains. We provide comprehensive datasets of aging-related genes, pathways and ligand–receptor interactions in nearly all brain cell types. Our analysis identified gene signatures that vary in a coordinated manner across cell types and gene sets that are regulated in a cell-type specific manner, even at times in opposite directions. These data reveal that aging, rather than inducing a universal program, drives a distinct transcriptional course in each cell population, and they highlight key molecular processes, including ribosome biogenesis, underlying brain aging. Overall, these large-scale datasets provide a resource for the neuroscience community that will facilitate additional discoveries directed towards understanding and modifying the aging process. Overall design: Total of 16 mice brains with raw data for 50,212 single cells and processed data for 37,089 single cells
Single-cell transcriptomic profiling of the aging mouse brain.
Specimen part, Subject
View SamplesGenome-wide alternative splice analysis of RNA from lupus and its severe form lupus nephritis
Genome-wide peripheral blood transcriptome analysis of Arab female lupus and lupus nephritis.
Sex, Specimen part, Disease stage
View SamplesOne of the critical substances that mammals highly regulate via the respiratory, cardiovascular and neurologic systems is O2. Both low and high O2 levels can induce major morbidities as well as mortality. Indeed, O2 has been often considered as both an elixir and a poison in humans. In current study, we have used an experimental selection approach to generate Drosophila strains that are tolerant to severe hyperoxic environment. Gene expression profiling is then applied to investigate the mechanisms underlying hyperoxia tolerance in the newly generated strains.
Experimental selection for Drosophila survival in extremely high O2 environments.
Specimen part
View SamplesUpon induction of DNA damage Arabidopsis thaliana plants initiate a transcriptional response program governed by signalling cascades which are activated by the ATM and ATR kinases
GMI1, a structural-maintenance-of-chromosomes-hinge domain-containing protein, is involved in somatic homologous recombination in Arabidopsis.
Specimen part
View SamplesIn this study, we describe the impact of genetic variation on transcript abundance in an F2 population of Arabidopsis thaliana. The RNA-seq resource generated by this study is suitable for expression quantitative trait locus (eQTL) mapping. From the aligned RNA-seq reads, and available genomic data for each of the parents of the cross, we imputed the genomes of each F2 individual (to allow genetic mapping of RNA abundance traits; briefly, genetic differences in aligned RNA-seq reads were used to impute each F2 genome). Our results show that heritable differences on gene expression can be detected using F2 populations (that is, single F2 plants), and shed light on the control of expression differences among strains of this reference plant. Overall design: 183 samples consisting of single F2 plants of a cross between Arabidopsis thaliana accessions 8230 and 6195 were generated. For each sample, RNA was collected from the aerial shoot at the 9th true leaf stage, and Illumina mRNA-seq libraries were constructed. Using these libraries, 50 bp single end RNA-seq Illumina reads were generated for each sample, and used to quantify gene expresison in each individual. The resulting expression phenotypes are suitable for genetic mapping of the control of gene expression differences in the species.
Epistatic and allelic interactions control expression of ribosomal RNA gene clusters in Arabidopsis thaliana.
Specimen part, Subject
View SamplesAn efficient innate immune recognition of the intracellular parasite T. cruzi is crucial for host protection against development of Chagas disease, which often leads to multiple organ damage, particularly the heart leading to cardiomyopathy. Mechanisms modulated by MyD88 have been shown to be necessary for resistance against T, cruzi infection. Recently, Nod-like receptors have been shown to play an important role as innate immune sensors, particularly as they relate to inflammasome function, caspase activation, and inflammatory cytokine production. In this study, we aimed to investigate the participation of innate immune responses in general, and inflammasomes in particular, in heart inflammation and cardiac damage upon infection with the T. cruzi parasite.
Apoptosis-associated speck-like protein containing a caspase recruitment domain inflammasomes mediate IL-1β response and host resistance to Trypanosoma cruzi infection.
Specimen part
View SamplesmiRNA-Sequencing was performed on human aortic valve interestitial cells (AVICs) exposed to 14% stretch at 1 hz or static conditions for 24h. Overall design: Six static control and six samples exposed to cyclic stretch 14% for 24h
The stretch responsive microRNA miR-148a-3p is a novel repressor of IKBKB, NF-κB signaling, and inflammatory gene expression in human aortic valve cells.
Specimen part, Subject
View SamplesAVICs were exposed to cyclic stretch to examine the role of mechanical stimuli on gene expression
The stretch responsive microRNA miR-148a-3p is a novel repressor of IKBKB, NF-κB signaling, and inflammatory gene expression in human aortic valve cells.
Specimen part
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Genetic correction of human induced pluripotent stem cells from patients with spinal muscular atrophy.
Specimen part
View SamplesSpinal Muscular Atrophy (SMA) is an autosomal recessive motor neuron disease and is the second most common genetic disorder leading to death in childhood. Motoneurons derived from induced pluripotent stem cells (iPS cells) obtained by reprogramming SMA patient and his healthy father fibroblasts, and genetically corrected SMA-iPSC obtained converting SMN2 into SMN1 with target gene correction (TGC), were used to study gene expression and splicing events linked to pathogenetic mechanisms.
Genetic correction of human induced pluripotent stem cells from patients with spinal muscular atrophy.
Specimen part
View Samples