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Articles 1 - 8 of 8
Full-Text Articles in Medicine and Health Sciences
Acidosis Potentiates The Host Proinflammatory Interleukin-1Β Response To Pseudomonas Aeruginosa Infection, I. M. Torres, Y. R. Patankar, Tamer B. Shabaneh, E. Dolben, Deborah Hogan, David Leib, Brent L. Berwin
Acidosis Potentiates The Host Proinflammatory Interleukin-1Β Response To Pseudomonas Aeruginosa Infection, I. M. Torres, Y. R. Patankar, Tamer B. Shabaneh, E. Dolben, Deborah Hogan, David Leib, Brent L. Berwin
Dartmouth Scholarship
Infection by Pseudomonas aeruginosa, and bacteria in general, frequently promotes acidification of the local microenvironment, and this is reinforced by pulmonary exertion and exacerbation. However, the consequence of an acidic environment on the host inflammatory response to P. aeruginosa infection is poorly understood. Here we report that the pivotal cellular and host proinflammatory interleukin-1β (IL-1β) response, which enables host clearance of the infection but can produce collateral inflammatory damage, is increased in response to P. aeruginosa infection within an acidic environment. Synergistic mechanisms that promote increased IL-1β release in response to P. aeruginosa infection in an acidic environment are …
Smarter Vaccine Design Will Circumvent Regulatory T Cell-Mediated Evasion In Chronic Hiv And Hcv Infection, Leonard Moise, Frances Terry, Andres H. Gutierrez, Ryan Tassone, Phyllis Losikoff, Stephen H. Gregory, Chris Bailey-Kellogg
Smarter Vaccine Design Will Circumvent Regulatory T Cell-Mediated Evasion In Chronic Hiv And Hcv Infection, Leonard Moise, Frances Terry, Andres H. Gutierrez, Ryan Tassone, Phyllis Losikoff, Stephen H. Gregory, Chris Bailey-Kellogg
Dartmouth Scholarship
Despite years of research, vaccines against HIV and HCV are not yet available, due largely to effective viral immunoevasive mechanisms. A novel escape mechanism observed in viruses that cause chronic infection is suppression of viral-specific effector CD4(+) and CD8(+) T cells by stimulating regulatory T cells (Tregs) educated on host sequences during tolerance induction. Viral class II MHC epitopes that share a T cell receptor (TCR)-face with host epitopes may activate Tregs capable of suppressing protective responses. We designed an immunoinformatic algorithm, JanusMatrix, to identify such epitopes and discovered that among human-host viruses, chronic viruses appear more human-like than viruses …
Enhanced Expression Of Codon Optimized Mycobacterium Avium Subsp. Paratuberculosis Antigens In Lactobacillus Salivarius, Christopher D. Johnston, John P. Bannatine, Rodney Govender, Lorraine Endersen, Daniel Pletzer, Helge Weingart, Aidan Coffey, Jim O'Mahony, Roy D. Sleator
Enhanced Expression Of Codon Optimized Mycobacterium Avium Subsp. Paratuberculosis Antigens In Lactobacillus Salivarius, Christopher D. Johnston, John P. Bannatine, Rodney Govender, Lorraine Endersen, Daniel Pletzer, Helge Weingart, Aidan Coffey, Jim O'Mahony, Roy D. Sleator
Department of Biological Sciences Publications
It is well documented that open reading frames containing high GC content show poor expression in A+T rich hosts. Specifically, G+C-rich codon usage is a limiting factor in heterologous expression of Mycobacterium avium subsp. paratuberculosis (MAP) proteins using Lactobacillus salivarius. However, re-engineering opening reading frames through synonymous substitutions can offset codon bias and greatly enhance MAP protein production in this host. In this report, we demonstrate that codon-usage manipulation of MAP2121c can enhance the heterologous expression of the major membrane protein (MMP), analogous to the form in which it is produced natively by MAP bacilli. When heterologously over-expressed, antigenic determinants …
Probiotics: Achieving A Better Regulatory Fit, Diane E. Hoffmann, Claire M. Fraser, Francis Palumbo, Jacques Ravel, Virginia Rowthorn, Jack Schwartz
Probiotics: Achieving A Better Regulatory Fit, Diane E. Hoffmann, Claire M. Fraser, Francis Palumbo, Jacques Ravel, Virginia Rowthorn, Jack Schwartz
Diane Hoffmann
In 2007, the National Institutes of Health (NIH) launched the Human Microbiome Project (HMP), a $150 million initiative to characterize the microbial communities found at several different sites on the human body and to analyze the role of these microbes in human health and disease. Many lines of research have demonstrated the significant role of the microbiota in human physiology. The microbiota is involved, for example, in the healthy development of the immune system, prevention of infection from pathogenic or opportunistic microbes, and maintenance of intestinal barrier function. The HMP findings are helping us understand the role and variation of …
Probiotics: Achieving A Better Regulatory Fit, Diane E. Hoffmann, Claire M. Fraser, Francis Palumbo, Jacques Ravel, Virginia Rowthorn, Jack Schwartz
Probiotics: Achieving A Better Regulatory Fit, Diane E. Hoffmann, Claire M. Fraser, Francis Palumbo, Jacques Ravel, Virginia Rowthorn, Jack Schwartz
Virginia Rowthorn
In 2007, the National Institutes of Health (NIH) launched the Human Microbiome Project (HMP), a $150 million initiative to characterize the microbial communities found at several different sites on the human body and to analyze the role of these microbes in human health and disease. Many lines of research have demonstrated the significant role of the microbiota in human physiology. The microbiota is involved, for example, in the healthy development of the immune system, prevention of infection from pathogenic or opportunistic microbes, and maintenance of intestinal barrier function. The HMP findings are helping us understand the role and variation of …
The Microbiome In Pediatric Cystic Fibrosis Patients: The Role Of Shared Environment Suggests A Window Of Intervention, Thomas H. Hampton, Deanna M. Green, Garry R. Cutting, Hilary G. Morrison, Mitchell L. Sogin, Alex H. Gifford, Bruce A. Stanton, George A. O’Toole
The Microbiome In Pediatric Cystic Fibrosis Patients: The Role Of Shared Environment Suggests A Window Of Intervention, Thomas H. Hampton, Deanna M. Green, Garry R. Cutting, Hilary G. Morrison, Mitchell L. Sogin, Alex H. Gifford, Bruce A. Stanton, George A. O’Toole
Dartmouth Scholarship
Cystic fibrosis (CF) is caused by mutations in the CFTR gene that predispose the airway to infection. Chronic infection by pathogens such as Pseudomonas aeruginosa leads to inflammation that gradually degrades lung function, resulting in morbidity and early mortality. In a previous study of CF monozygotic twins, we demonstrate that genetic modifiers significantly affect the establishment of persistent P. aeruginosa colonization in CF. Recognizing that bacteria other than P. aeruginosa contribute to the CF microbiome and associated pathology, we used deep sequencing of sputum from pediatric monozygotic twins and nontwin siblings with CF to characterize pediatric bacterial communities and the …
Human And Helicobacter Pylori Coevolution Shapes The Risk Of Gastric Disease, Nuri Kodaman, Alvaro Pazos, Barbara G. Schneider, M. Blanca Piazuelo, Robertino Mera, Rafal S. Sobota
Human And Helicobacter Pylori Coevolution Shapes The Risk Of Gastric Disease, Nuri Kodaman, Alvaro Pazos, Barbara G. Schneider, M. Blanca Piazuelo, Robertino Mera, Rafal S. Sobota
Dartmouth Scholarship
Helicobacter pylori is the principal cause of gastric cancer, the second leading cause of cancer mortality worldwide. However, H. pylori prevalence generally does not predict cancer incidence. To determine whether coevolution between host and pathogen influences disease risk, we examined the association between the severity of gastric lesions and patterns of genomic variation in matched human and H. pylori samples. Patients were recruited from two geographically distinct Colombian populations with significantly different incidences of gastric cancer, but virtually identical prevalence of H. pylori infection. All H. pylori isolates contained the genetic signatures of multiple ancestries, with an ancestral African cluster …
Probiotics: Achieving A Better Regulatory Fit, Diane E. Hoffmann, Claire M. Fraser, Francis Palumbo, Jacques Ravel, Virginia Rowthorn, Jack Schwartz
Probiotics: Achieving A Better Regulatory Fit, Diane E. Hoffmann, Claire M. Fraser, Francis Palumbo, Jacques Ravel, Virginia Rowthorn, Jack Schwartz
Faculty Scholarship
In 2007, the National Institutes of Health (NIH) launched the Human Microbiome Project (HMP), a $150 million initiative to characterize the microbial communities found at several different sites on the human body and to analyze the role of these microbes in human health and disease. Many lines of research have demonstrated the significant role of the microbiota in human physiology. The microbiota is involved, for example, in the healthy development of the immune system, prevention of infection from pathogenic or opportunistic microbes, and maintenance of intestinal barrier function. The HMP findings are helping us understand the role and variation of …