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Articles 61 - 70 of 70
Full-Text Articles in Molecular Biology
Transcriptomic Analysis Of Staphylococcal Srnas: Insights Into Species-Specific Adaption And The Evolution Of Pathogenesis, William H. Broach, Andy Weiss, Lindsey N. Shaw
Transcriptomic Analysis Of Staphylococcal Srnas: Insights Into Species-Specific Adaption And The Evolution Of Pathogenesis, William H. Broach, Andy Weiss, Lindsey N. Shaw
Molecular Biosciences Faculty Publications
Next-generation sequencing technologies have dramatically increased the rate at which new genomes are sequenced. Accordingly, automated annotation programs have become adept at identifying and annotating protein coding regions, as well as common and conserved RNAs. Additionally, RNAseq techniques have advanced our ability to identify and annotate regulatory RNAs (sRNAs), which remain significantly understudied. Recently, our group catalogued and annotated all previously known and newly identified sRNAs in several Staphylococcus aureus strains. These complete annotation files now serve as tools to compare the sRNA content of S. aureus with other bacterial strains to investigate the conservation of their sRNomes. Accordingly, in …
Effect Of Two-Year Caloric Restriction On Bone Metabolism And Bone Mineral Density In Non-Obese Younger Adults: A Randomized Clinical Trial., Dt Villareal, L Fontana, Sk Das, Et Al.
Effect Of Two-Year Caloric Restriction On Bone Metabolism And Bone Mineral Density In Non-Obese Younger Adults: A Randomized Clinical Trial., Dt Villareal, L Fontana, Sk Das, Et Al.
Faculty Publications
Although caloric restriction (CR) could delay biologic aging in humans, it is unclear if this would occur at the cost of significant bone loss. We evaluated the effect of prolonged CR on bone metabolism and bone mineral density (BMD) in healthy younger adults. Two-hundred eighteen non-obese (body mass index [BMI] 25.1?±?1.7?kg/m(2) ), younger (age 37.9?±?7.2 years) adults were randomly assigned to 25% CR (CR group, n?=?143) or ad libitum (AL group, n?=?75) for 2 years. Main outcomes were BMD and markers of bone turnover. Other outcomes included body composition, bone-active hormones, nutrient intake, and physical activity. Body weight (-7.5?±?0.4 versus …
Local Corticotropin Releasing Hormone (Crh) Signals To Its Receptor Crhr1 During Postnatal Development Of The Mouse Olfactory Bulb., Isabella Garcia, Paramjit K Bhullar, Burak Tepe, Joshua Ortiz-Guzman, Longwen Huang, Alexander M Herman, Lesley Chaboub, Benjamin Deneen, Nicholas J Justice, Benjamin R Arenkiel
Local Corticotropin Releasing Hormone (Crh) Signals To Its Receptor Crhr1 During Postnatal Development Of The Mouse Olfactory Bulb., Isabella Garcia, Paramjit K Bhullar, Burak Tepe, Joshua Ortiz-Guzman, Longwen Huang, Alexander M Herman, Lesley Chaboub, Benjamin Deneen, Nicholas J Justice, Benjamin R Arenkiel
Faculty Publications
Neuropeptides play important physiological functions during distinct behaviors such as arousal, learning, memory, and reproduction. However, the role of local, extrahypothalamic neuropeptide signaling in shaping synapse formation and neuronal plasticity in the brain is not well understood. Here, we characterize the spatiotemporal expression profile of the neuropeptide corticotropin-releasing hormone (CRH) and its receptor CRHR1 in the mouse OB throughout development. We found that CRH-expressing interneurons are present in the external plexiform layer, that its cognate receptor is expressed by granule cells, and show that both CRH and CRHR1 expression enriches in the postnatal period when olfaction becomes important towards olfactory-related …
Utility And Origin Of Blood-Based Autoantibodies For Early Detection And Diagnosis Of Neurodegenerative Diseases, Cassandra Demarshall
Utility And Origin Of Blood-Based Autoantibodies For Early Detection And Diagnosis Of Neurodegenerative Diseases, Cassandra Demarshall
Graduate School of Biomedical Sciences Theses and Dissertations
Autoantibodies are self-reactive antibodies that have been widely implicated as causal agents of autoimmune diseases. They are found in the blood of all human sera, regardless of age, gender, or the presence or absence of disease. While the underlying reason for their ubiquity remains unknown, it has been hypothesized that they participate in the clearance of blood-borne cell and tissue debris generated in both healthy and diseased individuals on a daily basis. Although much evidence supports this debris clearance role, recent studies also suggest a causal role for autoantibodies in disease. My thesis work has focused on this "cause and/or …
Efficiency Of The Targetron Gene Knockout System As A Transformative Protocol For The Mutagenesis Of Listeria Monocytogenes, Hilaree Noele Frazier
Efficiency Of The Targetron Gene Knockout System As A Transformative Protocol For The Mutagenesis Of Listeria Monocytogenes, Hilaree Noele Frazier
Online Theses and Dissertations
The process of using electroporation to introduce plasmid DNA into host cells is a valuable molecular technique that is increasingly employed in labs worldwide. Electroporators are generally small and relatively inexpensive, making them attractive systems to use for a variety of purposes. Electroporation protocols are numerous in the published literature and encompass all cell types, from prokaryotic bacterial cells to eukaryotic human cells. The TargeTron Gene Knockout System by Sigma-Aldrich is an affordable option for the electroporation of numerous bacterial species. However, its use in Listeria monocytogenes has not been extensively characterized. Here we sought to discuss the effectiveness of …
Towards The Complete Small Rnome Of Acinetobacter Baumannii, Andy Weiss, William H. Broach, Mackenzie C. Lee, Lindsey N. Shaw
Towards The Complete Small Rnome Of Acinetobacter Baumannii, Andy Weiss, William H. Broach, Mackenzie C. Lee, Lindsey N. Shaw
Molecular Biosciences Faculty Publications
In recent years, the Gram-negative bacterium Acinetobacter baumannii has garnered considerable attention for its unprecedented capacity to rapidly develop resistance to antibacterial therapeutics. This is coupled with the seemingly epidemic emergence of new hyper-virulent strains. Although strain-specific differences for A. baumannii isolates have been well described, these studies have primarily focused on proteinaceous factors. At present, only limited publications have investigated the presence and role of small regulatory RNA (sRNA) transcripts. Herein, we perform such an analysis, describing the RNA-seq-based identification of 78 A. baumannii sRNAs in the AB5075 background. Together with six previously identified elements, we include each of …
Potential Role Of Pctaire-2, Pctaire-3 And P-Histone H4 In Amyloid Precursor Protein-Dependent Alzheimer Pathology, Dale Chaput, Lisa Kirouac, Stanley M. Stevens Jr., Jaya Padmanabhan
Potential Role Of Pctaire-2, Pctaire-3 And P-Histone H4 In Amyloid Precursor Protein-Dependent Alzheimer Pathology, Dale Chaput, Lisa Kirouac, Stanley M. Stevens Jr., Jaya Padmanabhan
Molecular Biosciences Faculty Publications
Amyloid Precursor Protein (APP) is regulated in a mitosis-specific manner and plays a role in proliferative signaling in cells. Though APP-derived Aβ generation has a well-established role in neurodegeneration, the mechanistic role of APP in this process is not fully understood. Here, we performed an unbiased, comprehensive analysis of the phosphoproteome signature in APP-null neuroblastoma cells (B103) compared to those expressing APP-695 isoform (B103-695) to determine if APP expression affects protein phosphorylation. Stable isotope labeling by amino acids in cell culture (SILAC) followed by mass spectrometry-based phosphoproteomic analysis with PolyMAC identified a total of 2,478 phosphopeptides in the B103 and …
Peptidoglycan Recycling In Gram-Positive Bacteria Is Crucial For Survival In Stationary Phase, Marina Borisova, Rosmarie Gaupp, Amanda Duckworth, Alexander Schneider, Désirée Dalügge, Maraike Mühleck, Denise Deubel, Sandra Unsleber, Wenqi Yu, Günther Muth, Markus Bischoff, Friedrich Götz, Christoph Mayer
Peptidoglycan Recycling In Gram-Positive Bacteria Is Crucial For Survival In Stationary Phase, Marina Borisova, Rosmarie Gaupp, Amanda Duckworth, Alexander Schneider, Désirée Dalügge, Maraike Mühleck, Denise Deubel, Sandra Unsleber, Wenqi Yu, Günther Muth, Markus Bischoff, Friedrich Götz, Christoph Mayer
Molecular Biosciences Faculty Publications
Peptidoglycan recycling is a metabolic process by which Gram-negative bacteria reutilize up to half of their cell wall within one generation during vegetative growth. Whether peptidoglycan recycling also occurs in Gram-positive bacteria has so far remained unclear. We show here that three Gram-positive model organisms, Staphylococcus aureus, Bacillus subtilis, and Streptomyces coelicolor, all recycle the sugar N-acetylmuramic acid (MurNAc) of their peptidoglycan during growth in rich medium. They possess MurNAc-6-phosphate (MurNAc-6P) etherase (MurQ in E. coli) enzymes, which are responsible for the intracellular conversion of MurNAc-6P to N-acetylglucosamine-6-phosphate and d-lactate. By applying mass spectrometry, we observed accumulation of MurNAc-6P in …
Antibodies Against A Secreted Product Of Staphylococcus Aureus Trigger Phagocytic Killing, Lena Thomer, Carla Emolo, Vilasack Thammavongsa, Hwan Keun Kim, Molly E. Mcadow, Wenqi Yu, Matthew Kieffer, Olaf Schneewind, Dominique Missiakas
Antibodies Against A Secreted Product Of Staphylococcus Aureus Trigger Phagocytic Killing, Lena Thomer, Carla Emolo, Vilasack Thammavongsa, Hwan Keun Kim, Molly E. Mcadow, Wenqi Yu, Matthew Kieffer, Olaf Schneewind, Dominique Missiakas
Molecular Biosciences Faculty Publications
Host immunity against bacteria typically involves antibodies that recognize the microbial surface and promote phagocytic killing. Methicillin-resistant Staphylococcus aureus (MRSA) is a frequent cause of lethal bloodstream infection; however, vaccines and antibody therapeutics targeting staphylococcal surface molecules have thus far failed to achieve clinical efficacy. S. aureus secretes coagulase (Coa), which activates host prothrombin and generates fibrin fibrils that protect the pathogen against phagocytosis by immune cells. Because of negative selection, the coding sequence for the prothrombin-binding D1-D2 domain is highly variable and does not elicit cross-protective immune responses. The R domain, tandem repeats of a 27-residue peptide that bind …
Molecular And Biochemical Signaling Underlying Arabidopsis-Bacterial/Virus/Fungal Interactions, Mohamed H. El-Shetehy
Molecular And Biochemical Signaling Underlying Arabidopsis-Bacterial/Virus/Fungal Interactions, Mohamed H. El-Shetehy
Theses and Dissertations--Plant Pathology
Systemic acquired resistance (SAR) is a form of inducible defense response triggered upon localized infection that confers broad-spectrum disease resistance against secondary infections. Several factors are known to regulate SAR and these include phenolic phytohormone salicylic acid (SA), phosphorylated sugar glycerol-3-phosphate (G3P), and dicarboxylic acid azelaic acid (AzA). This study evaluated a role for free radicals nitric oxide (NO) and reactive oxygen species (ROS) in SAR. Normal accumulation of both NO and ROS was required for normal SAR and mutations preventing NO/ROS accumulation and/or biosynthesis compromised SAR. A role for NO and ROS was further established using pharmacological approaches. Notably, …