Diagnostic utility of high quality RNA in diverse clinical semen and sperm samples
ABSTRACT: We report quantitation of specific mRNAs in two RNA samples isolated from normozoospermic whole semen Examination of 2 different normozoospermic semen samples by RNA-seq Please note that raw data for 'GSM1273824: AY4' is incomplete.
Project description:Analysis of ejaculated spermatozoav from normozoospermic men and asthenozoospermic men. Some of genes were up-regulated or down-regulated in asthenozoospermia, and their abnormal expression were the causes of the impaired sperm motility. Results provide insight into the mechanisms by which asthenozoospermia is controlled. We used microarrays to detail the global programme of gene expression of ejaculated spermatozoa between normozoospermic and asthenozoospermic men and identified distinct classes of genes expressed differentially in two groups. Overall design: The liquefied semen samples from normozoospermic and asthenozoospermic men were purified by Percoll on a discontinuous density gradients for RNA extraction and hybridization on Affymetrix microarrays. 30 sperm samples of each group were pooled to abtain enough total RNA.
Project description:Analysis of ejaculated spermatozoav from normozoospermic men and asthenozoospermic men. Some of genes were up-regulated or down-regulated in asthenozoospermia, and their abnormal expression were the causes of the impaired sperm motility. Results provide insight into the mechanisms by which asthenozoospermia is controlled. We used microarrays to detail the global programme of gene expression of ejaculated spermatozoa between normozoospermic and asthenozoospermic men and identified distinct classes of genes expressed differentially in two groups. The liquefied semen samples from normozoospermic and asthenozoospermic men were purified by Percoll on a discontinuous density gradients for RNA extraction and hybridization on Affymetrix microarrays. 30 sperm samples of each group were pooled to abtain enough total RNA.
Project description:The widespread commercial use of TiO2-NPs, such as in medical stents, has led to extensive investigations on their toxicity and biological impact but lacks a detailed study on their effects. Proteomics and transcriptomics are key methodologies to unravel cellular dynamics, macromolecular interactions and biological response to NP exposure through the protein or gene identification and quantification. We focus on integration of several Omics strategies that could offer a more complex understanding of the impact. In this study, our goal was to gain insight into the cellular response after the exposure to sublethal concentration of TiO2-ultra small nanoparticles (USNPs) and NPs by analyzing the modification on the genomic and proteomic expression in human microdermal endothelial cells (HMEC-1). We investigated the correlation between the NP size and the cellular response to the exposure. We evaluated if multiOmics approaches could thus reveal more extensive information on the potential cellular responses to NPs exposure.
Project description:To study protein-RNA interactions at single amino acid and single nucleotide resolution we developed a new approach, termed cross-linking of segmentally isotope labeled RNA and tandem mass spectrometry (CLIR-MS/MS). The method was developed using the PTBP1-EMCV IRES complex as a model system and additionally applied to the U1 snRNP complex. Data from both complexes are included in this submission.
Project description:Aberrant DNA methylation profiles have been associated with male infertility and some semen parameters. However, few studies systematically surveyed DNA methylation profiles associated with sperm motility in normozoospermia and asthenozoospermia. In this study, based on promoter targeted bisulfite sequencing technology, we provided a quantitative description on global DNA methylation profiles. The average global methylation values were 24.7% and the inter-individual variance was about 14.4%, while the intra-individual variance was about 3.9%. The difference between different motile sperm population or different participant groups was subtle and not significant. Furthermore, we identified 134 differentially methylated CpGs and 134 differentially variable CpGs in low motile sperm from asthenozoospermic patient (P < 0.05). Based on the literature, we further found 16 differentially methylated or variable genes which were required for spermatogenesis or sperm motility or dominantly expressed in testis. This study will provide potential markers for clinical diagnosis and a promising basis for understanding the effect of DNA methylation on asthenozoospermia. Overall design: This is case-control study investigating DNA methylation of CpGs in functionally important regions of high and low motile sperm population from normozoospermic controls (n=8) and asthenozoospermic cases (n=7).
Project description:Herbaspirillum seropedicae is a diazotrophic bacterium which associates endophytically with economically important gramineae. Flavonoids such as naringenin, have been shown to have an effect on the interaction between H. seropedicae and its host plants. We used a high-throughput sequencing based method (RNA-Seq) to access the influence of naringenin on the whole transcriptome profile of H. seropedicae.
Project description:Diatoms are responsible for ~40% of marine primary productivity1, fueling the oceanic carbon cycle and contributing to natural carbon sequestration in the deep ocean2. Diatoms rely on energetically expensive carbon concentrating mechanisms (CCMs) to fix carbon efficiently at modern levels of CO23–5. How diatoms may respond over the short and long-term to rising atmospheric CO2 remains an open question. Here we use nitrate-limited chemostats to show that the model diatom Thalassiosira pseudonana rapidly responds to increasing CO2 by differentially expressing gene clusters that regulate transcription and chromosome folding and subsequently reduces transcription of photosynthesis and respiration gene clusters under steady-state elevated CO2. These results suggest that exposure to elevated CO2 first causes a shift in regulation and then a metabolic rearrangement. Genes in one CO2-responsive cluster included CCM and photorespiration genes that share a putative cyclic-AMP responsive cis-regulatory sequence, implying these genes are co-regulated in response to CO2 with cAMP as an intermediate messenger. We verified cAMP-induced down-regulation of CCM gene δ-CA3 in nutrient-replete diatom cultures by inhibiting the hydrolysis of cAMP. These results indicate an important role for cAMP in down-regulating CCM and photorespiration genes under elevated CO2 and provide insights into mechanisms of diatom acclimation in response to climate change. In steady-state experiments: axenic T. pseudonana cells in four biological replicates (duplicate chemostats x 2 experimental runs) were acclimated to nitrate-limitation at 70% (1.5 day-1) of max growth rate for >10 days (>15 generations) under continuous light of 80 µmol photons·m−2·s−1. Cell biomass was maintained at ~2 x 105 cells·mL−1 by 10 μM nitrate and carbonate chemistry stabilized to 300, 475 or 800 μatm CO2, verified by pH and DIC measurements. Transition samples and carbonate chemistry were collected daily from chemostat cultures as CO2 levels were increased from ~300-800 μatm at a rate ≤ 0.2 μatm·min−1 over four consecutive days (6 generations) after pre-acclimation to 300 μatm CO2 and nitrate-limitation.
Project description:Herbaspirillum seropedicae SmR1 was grown in NFbHPN medium until OD600nm of 0.6, when 5mM phenol or 2,5mM benzoic acid was added to the medium. After 30 minutes of growth, the cells were collected by centrifugation and total RNA was extracted with RiboPureBacteria. Also, a derivative strain from Herbaspirillum seropedicae SmR1 resistant to 1mM phenol (named strain RP) was grown in NFbHPN medium containing 1mM phenol until OD600nm of 0.6, then 5mM phenol was added to the medium. After 30 minutes of growth, the cells were collected by centrifugation and total RNA was extracted with RiboPureBacteria. All samples were depleted for ribossomal RNA e sequenced with Solid plataform.
Project description:In all domains of life, the catalysed degradation of RNA facilitates rapid adaption to changing environmental conditions. We identified a virus-encoded protein that directly binds and inhibits the RNA degradation machinery of its bacterial host, allowing efficient accumulation of viral RNA in the infected cell. Encoded by the giant phage фKZ, KZ37/Dip associates with two RNA binding sites of the RNase E component of the Pseudomonas aeruginosa RNA degradosome. Thereby, KZ37/Dip competes with the binding of RNA substrates, resulting in effective inhibition of RNA degradation. The crystal structure of KZ37/Dip (2.2 Å) reveals an unprecedented fold for which there are no identified structural homologues. The protein forms a homo-dimer that resembles a partially opened scroll and binds RNase E through exposed acidic patches on its convex outer surface. Through the activity of KZ37/Dip, фKZ has evolved a unique mechanism to down regulate a key process of its host.
Project description:Short-read NGS technology (SOLIDTM, Life Technologies) was used to establish a comprehensive repertoire of miRNA expressed in either equine cartilage or subchondral bone. Undamaged cartilage and subchondral bone samples from 10-month Anglo-Arabian foals affected by osteochondrosis (OC) were analyzed and compared with samples from healthy foals. Samples were also subjected or not to an experimental mechanical loading to evaluate the role of miRNAs in the regulation of mechano-transduction pathways. Epiphyseal cartilage and subchondral bone miRNome were defined, including about 300 new miRNAs. Differentially expressed miRNAs were identified between bone and cartilage from healthy and OC foals, as well as after the experimental mechanical loading, suggesting that miRNAs play a role in equine OC physiopathology and in the cellular response to biomechanical stress in cartilage and bone.