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Immunology and Infectious Disease Commons™
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Articles 31 - 37 of 37
Full-Text Articles in Immunology and Infectious Disease
Cftr Deletion In Mouse Epithelial And Immune Cells Differentially Influence The Intestinal Microbiota, Callie E. Scull, Meng Luo, Scott Jennings, Christopher M. Taylor, Guoshun Wang
Cftr Deletion In Mouse Epithelial And Immune Cells Differentially Influence The Intestinal Microbiota, Callie E. Scull, Meng Luo, Scott Jennings, Christopher M. Taylor, Guoshun Wang
School of Medicine Faculty Publications
Cystic fibrosis (CF) is a life-threatening genetic disorder, caused by mutations in the CF transmembrane-conductance regulator gene (cftr) that encodes CFTR, a cAMP-activated chloride and bicarbonate channel. Clinically, CF lung disease dominates the adult patient population. However, its gastrointestinal illness claims the early morbidity and mortality, manifesting as intestinal dysbiosis, inflammation and obstruction. As CF is widely accepted as a disease of epithelial dysfunction, it is unknown whether CFTR loss-of-function in immune cells contributes to these clinical outcomes. Using cftr genetic knockout and bone marrow transplantation mouse models, we performed 16S rRNA gene sequencing of the intestinal microbes. Here we …
Solid-State Nmr Analysis Of Unlabeled Fungal Cell Walls From Aspergillus And Candida Species, Liyanage D. Fernando, Malitha C. Dickwella Widanage, S. Chandra Shekar, Frederic Mentink-Vigier, Ping Wang, Sungsool Wi, Tuo Wang
Solid-State Nmr Analysis Of Unlabeled Fungal Cell Walls From Aspergillus And Candida Species, Liyanage D. Fernando, Malitha C. Dickwella Widanage, S. Chandra Shekar, Frederic Mentink-Vigier, Ping Wang, Sungsool Wi, Tuo Wang
School of Medicine Faculty Publications
Fungal infections cause high mortality in immunocompromised individuals, which has emerged as a significant threat to human health. The efforts devoted to the development of antifungal agents targeting the cell wall polysaccharides have been hindered by our incomplete picture of the assembly and remodeling of fungal cell walls. High-resolution solid-state nuclear magnetic resonance (ss NMR) studies have substantially revised our understanding of the polymorphic structure of polysaccharides and the nanoscale organization of cell walls in Aspergillus fumigatus and multiple other fungi. However, this approach requires 13C/15N-enrichment of the sample being studied, severely restricting its application. Here we employ the dynamic …
Gut Microbiota Composition And Predicted Microbial Metabolic Pathways Of Obesity Prone And Obesity Resistant Outbred Sprague-Dawley Cd Rats May Account For Differences In Their Phenotype, Diana N. Obanda, Michael J. Keenan, Ryan Page, Anne M. Raggio, Christopher Taylor, Brian D. Marx, Rhett W. Stout, Justin Guice, Meng Luo, David A. Welsh, Diana Coulon, Claudia Husseneder
Gut Microbiota Composition And Predicted Microbial Metabolic Pathways Of Obesity Prone And Obesity Resistant Outbred Sprague-Dawley Cd Rats May Account For Differences In Their Phenotype, Diana N. Obanda, Michael J. Keenan, Ryan Page, Anne M. Raggio, Christopher Taylor, Brian D. Marx, Rhett W. Stout, Justin Guice, Meng Luo, David A. Welsh, Diana Coulon, Claudia Husseneder
School of Graduate Studies Faculty Publications
Like humans, outbred Sprague-Dawley CD rats exhibit a polygenic pattern of inheritance of the obese phenotype and not all individuals exposed to a high calorie intake develop obesity. We hypothesized that differences in gut microbiota composition account for phenotype differences between obese prone (OP) and obese resistant (OR) rats. We studied the gut microbiota composition of OPand OR rats after a high fat (HF) diet and how they respond to fermentation of resistant starch (RS). In phase 1 of the study 28 OP and 28 OR rats were fed a HF diet. In order to determine causal role of microbiota …
Moerv29 Promotes Apoplastic Effector Secretion Contributing To Virulence Of The Rice Blast Fungus Magnaporthe Oryzae, Bin Qian, Xiaotong Su, Ziyuan Ye, Xinyu Liu, Muxing Liu, Danyu Shen, Han Chen, Haifeng Zhang, Ping Wang, Zhengguang Zhang
Moerv29 Promotes Apoplastic Effector Secretion Contributing To Virulence Of The Rice Blast Fungus Magnaporthe Oryzae, Bin Qian, Xiaotong Su, Ziyuan Ye, Xinyu Liu, Muxing Liu, Danyu Shen, Han Chen, Haifeng Zhang, Ping Wang, Zhengguang Zhang
School of Medicine Faculty Publications
During plant-pathogenic fungi and host plants interactions, numerous pathogen-derived proteins are secreted resulting in the activation of the unfolded protein response (UPR) pathway. For efficient trafficking of secretory proteins, including those important in disease progression, the cytoplasmic coat protein complex II (COPII) exhibits a multifunctional role whose elucidation remains limited. Here, we discovered that the COPII cargo receptor MoErv29 functions as a target of MoHac1, a previously identified transcription factor of the UPR pathway. In Magnaporthe oryzae, deletion of MoERV29 severely affected the vegetative growth, conidiation and biotrophic invasion of the fungus in susceptible rice hosts. We demonstrated that MoErv29 …
Chain-Selective Isotopic Labeling Of The Heterodimeric Type Iii Secretion Chaperone, Scc4:Scc1, Reveals The Total Structural Rearrangement Of The Chlamydia Trachomatis Bi-Functional Protein, Scc4, Thilini O. Ukwaththage, Samantha M. Keane, Li Shen, Megan A. Macnaughtan
Chain-Selective Isotopic Labeling Of The Heterodimeric Type Iii Secretion Chaperone, Scc4:Scc1, Reveals The Total Structural Rearrangement Of The Chlamydia Trachomatis Bi-Functional Protein, Scc4, Thilini O. Ukwaththage, Samantha M. Keane, Li Shen, Megan A. Macnaughtan
School of Medicine Faculty Publications
Scc4 is an unusual bi-functional protein from Chlamydia trachomatis (CT) that functions as a type III secretion system (T3SS) chaperone and an RNA polymerase (RNAP)-binding protein. Both functions require interactions with protein partners during specific stages of the CT developmental cycle. As a T3SS chaperone, Scc4 binds Scc1 during the late stage of development to form a heterodimer complex, which chaperones the essential virulence effector, CopN. During the early-middle stage of development, Scc4 regulates T3SS gene expression by binding the σ66-containing RNAP holoenzyme. In order to study the structure and association mechanism of the Scc4:Scc1 T3SS chaperone complex using nuclear …
Changes In The Gut Microbial Communities Following Addition Of Walnuts To The Diet, Lauri O. Byerley, Derrick Samuelson, Eugene Blanchard, Meng Luo, Brittany N. Lorenzen, Shelia Banks, Monica A. Ponder, David A. Welsh, Christopher M. Taylor
Changes In The Gut Microbial Communities Following Addition Of Walnuts To The Diet, Lauri O. Byerley, Derrick Samuelson, Eugene Blanchard, Meng Luo, Brittany N. Lorenzen, Shelia Banks, Monica A. Ponder, David A. Welsh, Christopher M. Taylor
School of Graduate Studies Faculty Publications
Walnuts are rich in omega-3 fatty acids, phytochemicals and antioxidants making them unique compared to other foods. Consuming walnuts has been associated with health benefits including a reduced risk of heart disease and cancer. Dysbiosis of the gut microbiome has been linked to several chronic diseases. One potential mechanism by which walnuts may exert their health benefit is through modifying the gut microbiome. This study identified the changes in the gut microbial communities that occur following the inclusion of walnuts in the diet. Male Fischer 344 rats (n=20) were randomly assigned to one of two diets for as long as …
Hiv-1 Tat Protein Promotes Neuronal Dysfunction Through Disruption Of Micrornas, J Robert Chang, Ruma Mukerjee, Asen Bagashev, Luis Del Valle, Tinatin Chabrashvili, Brian J. Hawkins, Johnny J. He, Bassel E. Sawaya
Hiv-1 Tat Protein Promotes Neuronal Dysfunction Through Disruption Of Micrornas, J Robert Chang, Ruma Mukerjee, Asen Bagashev, Luis Del Valle, Tinatin Chabrashvili, Brian J. Hawkins, Johnny J. He, Bassel E. Sawaya
School of Medicine Faculty Publications
Over the last decade, small noncoding RNA molecules such as microRNAs (miRNAs) have emerged as critical regulators in the expression and function of eukaryotic genomes. It has been suggested that viral infections and neurological disease outcome may also be shaped by the influence of small RNAs. This has prompted us to suggest that HIV infection alters the endogenous miRNA expression patterns, thereby contributing to neuronal deregulation and AIDS dementia. Therefore, using primary cultures and neuronal cell lines, we examined the impact of a viral protein (HIV-1 Tat) on the expression of miRNAs due to its characteristic features such as release …