Analysis of gene expression in Ws-0 lec1 (LEAFY COTYLEDON1) mutant Arabidopsis thaliana. Developmental stages studied includes 24-Hr post-fertilization, globular stage, cotyledon stage, mature green stage, post-mature green stage, and seedlings.
LEC1 sequentially regulates the transcription of genes involved in diverse developmental processes during seed development.
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View SamplesExamined the expression effects of supplementing Drosophila food on heart and nephrocyte complexes
Diet-Induced Podocyte Dysfunction in Drosophila and Mammals.
Sex, Specimen part, Treatment
View SamplesMitochondrial DNA (mtDNA) encodes essential components of the respiratory chain and loss of mtDNA leads to mitochondrial dysfunction and neurodegeneration. Mitochondrial transcription factor A (TFAM) is an essential component of mtDNA replication and a regulator of mitochondrial copy number in cells. Studies have shown that TFAM knockdown leads to mitochondrial dysfunction and respiratory chain deficiencies. ATP synthase is Complex V of the mitochondrial respiratory chain. It is driven by a proton gradient between the intermembrane space and the mitochondrial matrix and generates the majority of cellular ATP. The knockdown of coupling factor 6 (Cf6), one of the components of the proton channel F0, causes dysfunction in the complex, leading to mitochondrial dysfunction and respiratory chain deficiencies. Using gene expression analysis, we aimed to investigate the effects of mtDNA dysfunction in the CNS at the molecular level.
Mitochondrial retrograde signaling regulates neuronal function.
Specimen part
View SamplesChronic high sugar feeding induces obesity, hyperglycemia, and insulin resistance in flies and mammals. To gain insight into the mechanisms underlying this response, we profiled gene expression in chronically high sugar fed, wandering (post-prandial) third instar wild type larvae (L3). These data were compared to control-fed larvae as well as those (mid-L3) actively feeding for twelve hours on both diets.
A high-sugar diet produces obesity and insulin resistance in wild-type Drosophila.
Sex, Specimen part
View SamplesExpression profiles of wild type migratory border cells (WTBC), non-migrating slbo mutant border cells (slboBC) and non-migrating follicle cells (FC)
Systematic analysis of the transcriptional switch inducing migration of border cells.
Sex, Specimen part
View SamplesWe generated single and double knockouts of AtNHX5 and AtNHX6 in order to invesigate possible functions in Arabidopsis. nhx5/nhx6 exhibited severe growth retardation related to cell size and proliferation, as well as endosomal trafficking perutrbations. The results implicate endosomal NHX antiporters in novel cellular functions. In order to investigate further the possible functions of AtNHX5 and AtNHX6, we compared the transcrptional profiles of single and double AtNHX5 and AtNHX6 knockouts. We looked for changes in gene expression might help us to elucidate the molecular events associated with the apparent requirement of AtNHX5 and AtNHX6 for normal growth and development.
The Arabidopsis intracellular Na+/H+ antiporters NHX5 and NHX6 are endosome associated and necessary for plant growth and development.
Specimen part
View SamplesThe exposure to and contamination by Persistent Organic Pollutants (POPs), which include pesticides used worldwide and polyaromatic hydrocarbons, is detrimental to human health and diverse ecosystems. Although most mechanistic studies have focused on single compounds, living organisms are exposed to multiple environmental xenobiotics, simultaneously, throughout their lives. The experimental evidence useful for assessing the effects of exposure to pollutant mixtures is scarce. We investigated the effects of exposure to a combination of two POPs, which employ different xenosensors, on global gene expression in a human hepatocyte cell model, HepaRG.
Two persistent organic pollutants which act through different xenosensors (alpha-endosulfan and 2,3,7,8 tetrachlorodibenzo-p-dioxin) interact in a mixture and downregulate multiple genes involved in human hepatocyte lipid and glucose metabolism.
Specimen part
View SamplesAutism spectrum disorders (ASD) are a group of genetic disorders often overlapping with other neurological conditions. We previously described abnormalities in the branched chain amino acid (BCAA) catabolic pathway as a cause of ASD. Here we show that the solute carrier transporter 7a5 (SLC7A5), a large neutral amino acid transporter localized at the blood brain barrier (BBB), has an essential role in maintaining normal levels of brain BCAAs. In mice, deletion of Slc7a5 from the endothelial cells of the BBB leads to decreased levels of brain BCAAs, abnormal mRNA translation and severe neurological abnormalities. Furthermore, we identified several patients with autistic traits and motor delay carrying deleterious homozygous mutations in the SLC7A5 gene. Finally, we demonstrate that BCAA intracerebroventricular administration ameliorates abnormal behaviors in adult mutant mice. Our data elucidate a neurological syndrome defined by SLC7A5 mutations and support an essential role for the BCAA in human brain function. Overall design: RNA-sequencing of cerebellum from 3 wildtype mice and 3 Slc7a5 KO mice
Impaired Amino Acid Transport at the Blood Brain Barrier Is a Cause of Autism Spectrum Disorder.
Specimen part, Subject
View SamplesGGF2 is a recombinant human neuregulin-1 in development for chronic heart failure. Phase 1 clinical trials of GGF2 were put on hold when transient elevations in serum aminotransferases and total bilirubin were observed in 2 of 43 subjects receiving GGF2. However, aminotransferase elevations were modest and not typical of liver injury sufficient to result in elevated serum bilirubin. Several translational approaches were used to understand the liver response associated with GGF2.
Transient Changes in Hepatic Physiology That Alter Bilirubin and Bile Acid Transport May Explain Elevations in Liver Chemistries Observed in Clinical Trials of GGF2 (Cimaglermin Alfa).
Treatment
View SamplesDespite substantial investments, tuberculosis remains one of the biggest challenges in public health.
Synergy of chemotherapy and immunotherapy revealed by a genome-scale analysis of murine tuberculosis.
Sex, Specimen part
View Samples