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Articles 91 - 100 of 100
Full-Text Articles in Virology
Tdrd3 Is An Antiviral Restriction Factor That Promotes Ifn Signaling With G3bp1, Matthew Deater, Manasi Tamhankar, Richard E Lloyd
Tdrd3 Is An Antiviral Restriction Factor That Promotes Ifn Signaling With G3bp1, Matthew Deater, Manasi Tamhankar, Richard E Lloyd
Faculty, Staff and Students Publications
Stress granules (SGs) are highly dynamic cytoplasmic foci that form in response to activation of the integrated stress response (ISR) that results in eIF2α phosphorylation and global translation shutdown. Stress granules, which are largely nucleated by G3BP1, serve as hubs for mRNA triage, but there is mounting evidence that they also perform cell signaling functions that are vital to cell survival, particularly during viral infection. We previously showed that SG formation leads to NFκB activation and JNK signaling and that this association may be due in part to G3BP1-dependent recruitment of PKR to SGs. Others have reported close associations between …
Development Of Phage Cocktails To Treat E Coli Catheter-Associated Urinary Tract Infection And Associated Biofilms, Belkys C Sanchez, Emmaline R Heckmann, Sabrina I Green, Justin R Clark, Heidi B Kaplan, Robert F Ramig, Casey Hines-Munson, Felicia Skelton, Barbara W Trautner, Anthony W Maresso
Development Of Phage Cocktails To Treat E Coli Catheter-Associated Urinary Tract Infection And Associated Biofilms, Belkys C Sanchez, Emmaline R Heckmann, Sabrina I Green, Justin R Clark, Heidi B Kaplan, Robert F Ramig, Casey Hines-Munson, Felicia Skelton, Barbara W Trautner, Anthony W Maresso
Faculty, Staff and Students Publications
High rates of antimicrobial resistance and formation of biofilms makes treatment of Escherichia coli catheter-associated urinary tract infections (CAUTI) particularly challenging. CAUTI affect 1 million patients per year in the United States and are associated with morbidity and mortality, particularly as an etiology for sepsis. Phage have been proposed as a potential therapeutic option. Here, we report the development of phage cocktails that lyse contemporary E. coli strains isolated from the urine of patients with spinal cord injury (SCI) and display strong biofilm-forming properties. We characterized E. coli phage against biofilms in two in vitro CAUTI models. Biofilm viability was …
Gut Microbiota From Sjögren Syndrome Patients Causes Decreased T Regulatory Cells In The Lymphoid Organs And Desiccation-Induced Corneal Barrier Disruption In Mice, Laura Schaefer, Claudia M Trujillo-Vargas, Firas S Midani, Stephen C Pflugfelder, Robert A Britton, Cintia S De Paiva
Gut Microbiota From Sjögren Syndrome Patients Causes Decreased T Regulatory Cells In The Lymphoid Organs And Desiccation-Induced Corneal Barrier Disruption In Mice, Laura Schaefer, Claudia M Trujillo-Vargas, Firas S Midani, Stephen C Pflugfelder, Robert A Britton, Cintia S De Paiva
Faculty, Staff and Students Publications
Sjögren syndrome (SS) is an autoimmune inflammatory disorder characterized by secretory dysfunction in the eye and mouth; in the eye, this results in tear film instability, reduced tear production, and corneal barrier disruption. A growing number of studies show that homeostasis of the ocular surface is impacted by the intestinal microbiome, and several 16S sequencing studies have demonstrated dysbiosis of the intestinal microbiota in SS patients. In this study, we utilized metagenomic sequencing to perform a deeper analysis of the intestinal microbiome using stools collected from sex- and age-matched healthy (n = 20), dry eye (n = 4) …
Modeling Nonsegmented Negative-Strand Rna Virus (Nnsv) Transcription With Ejective Polymerase Collisions And Biased Diffusion, Felipe-Andrés Piedra, David Henke, Anubama Rajan, Donna M Muzny, Harsha Doddapaneni, Vipin K Menon, Kristi L Hoffman, Matthew C Ross, Sara J Javornik Cregeen, Ginger Metcalf, Richard A Gibbs, Joseph F Petrosino, Vasanthi Avadhanula, Pedro A Piedra
Modeling Nonsegmented Negative-Strand Rna Virus (Nnsv) Transcription With Ejective Polymerase Collisions And Biased Diffusion, Felipe-Andrés Piedra, David Henke, Anubama Rajan, Donna M Muzny, Harsha Doddapaneni, Vipin K Menon, Kristi L Hoffman, Matthew C Ross, Sara J Javornik Cregeen, Ginger Metcalf, Richard A Gibbs, Joseph F Petrosino, Vasanthi Avadhanula, Pedro A Piedra
Faculty, Staff and Students Publications
Infections by non-segmented negative-strand RNA viruses (NNSV) are widely thought to entail gradient gene expression from the well-established existence of a single promoter at the 3' end of the viral genome and the assumption of constant transcriptional attenuation between genes. But multiple recent studies show viral mRNA levels in infections by respiratory syncytial virus (RSV), a major human pathogen and member of NNSV, that are inconsistent with a simple gradient. Here we integrate known and newly predicted phenomena into a biophysically reasonable model of NNSV transcription. Our model succeeds in capturing published observations of respiratory syncytial virus and vesicular stomatitis …
Whole Lung Lavage: Treating Pulmonary Alveolar Proteinosis At The Time Of Covid Pandemic, Katherine Jean Powers, Vasanthi Avadhanula, Purvesh R Patel, Pralay Kumar Sarkar, Pedro Piedra, Neda Zarrin-Khameh
Whole Lung Lavage: Treating Pulmonary Alveolar Proteinosis At The Time Of Covid Pandemic, Katherine Jean Powers, Vasanthi Avadhanula, Purvesh R Patel, Pralay Kumar Sarkar, Pedro Piedra, Neda Zarrin-Khameh
Faculty, Staff and Students Publications
Pulmonary alveolar proteinosis (PAP) is a rare syndrome due to increased production or decreased clearance of surfactant in alveoli and terminal bronchi that cause hypoxemic respiratory insufficiency. Here we present a patient with PAP whose disease was exacerbated by superimposed COVID-19 pneumonia. He underwent whole lung lavage (WLL). Evaluation of the viral count of the first and the last lavage of the left lung showed viral load in the alveolar space dropped by approximately 10-folds, however the magnitude of the viral load was substantial in both lavage samples. Whole pulmonary lavage may be used as a treatment option on patients …
Development Of Phage Cocktails To Treate Coli Catheter-Associated Urinary Tract Infection And Associated Biofilms, Belkys C Sanchez, Emmaline R Heckmann, Sabrina I Green, Justin R Clark, Heidi B Kaplan, Robert F Ramig, Casey Hines-Munson, Felicia Skelton, Barbara W Trautner, Anthony W Maresso
Development Of Phage Cocktails To Treate Coli Catheter-Associated Urinary Tract Infection And Associated Biofilms, Belkys C Sanchez, Emmaline R Heckmann, Sabrina I Green, Justin R Clark, Heidi B Kaplan, Robert F Ramig, Casey Hines-Munson, Felicia Skelton, Barbara W Trautner, Anthony W Maresso
Faculty, Staff and Students Publications
High rates of antimicrobial resistance and formation of biofilms makes treatment of Escherichia coli catheter-associated urinary tract infections (CAUTI) particularly challenging. CAUTI affect 1 million patients per year in the United States and are associated with morbidity and mortality, particularly as an etiology for sepsis. Phage have been proposed as a potential therapeutic option. Here, we report the development of phage cocktails that lyse contemporary E. coli strains isolated from the urine of patients with spinal cord injury (SCI) and display strong biofilm-forming properties. We characterized E. coli phage against biofilms in two in vitro CAUTI models. Biofilm viability was …
Rotavirus-Induced Lipid Droplet Biogenesis Is Critical For Virus Replication, Jeanette M Criglar, Mary K Estes, Sue E Crawford
Rotavirus-Induced Lipid Droplet Biogenesis Is Critical For Virus Replication, Jeanette M Criglar, Mary K Estes, Sue E Crawford
Faculty, Staff and Students Publications
A variety of pathogens, including viruses, bacteria and parasites, target cellular lipid droplets for their replication. Rotaviruses (RVs) infect the villous epithelium of the small intestine and are a major cause of acute gastroenteritis in infants and young children worldwide. RVs induce and require lipid droplets for the formation of viroplasms, sites of virus genome replication, and nascent particle assembly. Here we review the role of lipid droplets in RV replication. Inhibitors of fatty acid synthesis or chemicals that interfere with lipid droplet homeostasis decrease the number and size of viroplasms and the yield of infectious virus. We used a …
Modified Vaccinia Ankara Expressing Eehv1a Glycoprotein B Elicits Humoral And Cell-Mediated Immune Responses In Mice, Taylor Pursell, Jennifer L Spencer Clinton, Jie Tan, Rongsheng Peng, Paul D Ling
Modified Vaccinia Ankara Expressing Eehv1a Glycoprotein B Elicits Humoral And Cell-Mediated Immune Responses In Mice, Taylor Pursell, Jennifer L Spencer Clinton, Jie Tan, Rongsheng Peng, Paul D Ling
Faculty, Staff and Students Publications
Elephant endotheliotropic herpesvirus (EEHV) can cause lethal hemorrhagic disease (EEHV-HD) in Asian elephants and is the largest cause of death in captive juvenile Asian elephants in North America and Europe. EEHV-HD also has been documented in captive and wild elephants in their natural range countries. A safe and effective vaccine to prevent lethal EEHV infection would significantly improve conservation efforts for this endangered species. Recent studies from our laboratory suggest that EEHV morbidity and mortality are often associated with primary infection. Therefore, we aim to generate a vaccine, particularly for EEHV1 naïve animals, with the goal of preventing lethal EEHV-HD. …
Interleukin-1Β Secretion Induced By Mucosa-Associated Gut Commensal Bacteria Promotes Intestinal Barrier Repair, Wan-Jung H Wu, Myunghoo Kim, Lin-Chun Chang, Adrien Assie, Fatima B Saldana-Morales, Daniel F Zegarra-Ruiz, Kendra Norwood, Buck S Samuel, Gretchen E Diehl
Interleukin-1Β Secretion Induced By Mucosa-Associated Gut Commensal Bacteria Promotes Intestinal Barrier Repair, Wan-Jung H Wu, Myunghoo Kim, Lin-Chun Chang, Adrien Assie, Fatima B Saldana-Morales, Daniel F Zegarra-Ruiz, Kendra Norwood, Buck S Samuel, Gretchen E Diehl
Faculty, Staff and Students Publications
The gut microbiota is essential for maintenance and repair of the intestinal epithelial barrier. As shifts in both intestinal epithelial barrier function and microbiota composition are found in inflammatory bowel disease patients, it is critical to understand the role of distinct bacteria in regulating barrier repair. We identified a mouse commensal E. coli isolate, GDAR2-2, that protects mice from Citrobacter rodentium infection and dextran sulfate sodium-induced colitis. Colonization with GDAR2-2 in mice resulted in expansion of CX3CR1+ mononuclear phagocytes, including CX3CR1+ macrophages/dendritic cells and monocytes, along with IL-22-secreting type 3 innate lymphoid cells and improved epithelial barrier function. In vitro …
Role Of Host Restriction Factors On Porcine Reproductive And Respiratory Syndrome Virus (Prrsv) Replication, Pratik Katwal
Role Of Host Restriction Factors On Porcine Reproductive And Respiratory Syndrome Virus (Prrsv) Replication, Pratik Katwal
Electronic Theses and Dissertations
In this study, the role of IFITM3 on PRRSV replication was studied in vitro by expressing exogenous IFITM3 in MARC-145 cells. An average of 31% reduction in PRRSV N protein expression and an average of 5.4 fold decrease in virus titer in the supernatant were observed in IFITM3 overexpressing cells as compared to vector control cells at 24 hours post infection (hpi). Moreover, there was a positive correlation between interferon- induced IFITM3 up-regulation and reduced PRRSV replication. To determine the role of endogenous IFITM3 in PRRSV replication, siRNA induced knockdown of IFITM3 was employed. RT-PCR validated the successful silencing of …