Download or read book Mapping Metabolic Pathways for Mucosal Health at the Host microbe Interface written by Katti R. Crakes and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Background: Human body surfaces are lined by mucosal membranes composed of epithelial cells which serve as the primary barrier for protection against pathogens. These mucous membranes function in a shared environment with resident microbes, creating a complex ecosystem with communal sources of nutrients for the host as well as its microbes. Encounters with viral, fungal, and bacterial pathogens can directly or indirectly damage epithelial cells, disrupting tight junctions that keep mucosal barriers intact. Disruption of epithelial barriers lead to downstream inflammation, translocation of microbial products into the bloodstream, and exacerbation of disease. For example, Human immunodeficiency virus-1 (HIV) proteins can target zonula occludens for viral entry and dissemination, Clostridium perfringens utilizes claudin proteins as receptors for entry, and candidalysin toxin from Candida albicans targets junctional complexes for translocation, all of which induce permeability in epithelial barriers. Furthermore, autoimmune diseases such as inflammatory bowel disease and diabetes exhibit similar pathologies in intestinal barrier disruption and microbial dysbiosis. While these barrier defects have been observed across a broad range of diseases, there is a lack of understanding in how tight junctions are regulated by epithelial cells and which therapeutic targets will be effective. My dissertation takes two approaches to address this issue: 1) mucosal repair in chronic inflammation and 2) mucosal protection against pathogens. I hypothesized that strategies targeting entry of pathogens and cellular metabolism at mucosal sites will be fundamental for effective prevention and treatment of chronic diseases. This dissertation presents three studies that advance our knowledge about mucosal repair/protection by leveraging host-microbial metabolic pathways and mucoadhesive drug delivery systems. 1: Repair of gut epithelial barriers during SIV-induced chronic gut inflammation through the mitochondria-microbiota crosstalk. Chronic gut inflammatory diseases are associated with disruption of intestinal epithelial barriers and impaired mucosal immunity. HIV causes depletion of mucosal CD4+ T cells early in infection and disruption of gut epithelium, resulting in chronic inflammation and immunodeficiency. Although antiretroviral therapy is effective in suppressing viral replication, it is incapable of restoring the "leaky gut," which poses an impediment for HIV cure efforts. Using the intestinal loop model in SIV-infected rhesus macaques, we found rapid repair of gut epithelial barriers within five hours of administering Lactobacillus plantarum into virally inflamed gut. The rapid recovery was driven by peroxisome proliferator-activated receptor (PPAR[alpha]) activation and occurred independent of mucosal CD4+ T cell recovery, highlighting a metabolic repair pathway in mitochondrial [beta]-oxidation that can be targeted for epithelial repair prior to complete immune recovery. These findings highlight the critical role of PPAR[alpha] at the intersection between microbial metabolism and epithelial repair in virally inflamed gut and as a potential mitochondrial target for restoring gut barriers in infectious or inflammatory diseases. Study 2: Renewal of gut epithelial barriers in metabolic disease through PPAR[alpha] signaling at the host-microbe interface in metabolic disease. Metabolic disease affects approximately one-third of the US adult population, and is defined by pathological conditions associated with obesity, insulin resistance, hypertension, and hyperlipidemia. Metabolic disease is concomitant to dysfunctions in the intestinal barrier and an increased risk for mucosal infection and systemic inflammation, all of which are poorly understood. Using a canine model of diabetes mellitus (DM), we translated our findings in Study 1 and tested the clinical translation of PPAR[alpha] activation on gut epithelial barriers using fenofibrate, a known PPAR[alpha] agonist. We found that a 3-week oral dosage of fenofibrate alleviates small intestinal barrier disruption and improves lipid metabolism in dogs with DM. Reduction of plasma triglycerides after 3 weeks correlated with lower immune activation and reduction of intraepithelial T lymphocytes in the duodenum. The gut microbial composition remained stable after fenofibrate administration, suggesting that repair of intestinal barriers can be achieved independent of surrounding microbiota. These findings indicate that lipid metabolism is essential to functionality of the gut epithelium, which can be rescued by PPAR[alpha] activation in DM. Study 3: Protection of genital mucosal surfaces against HIV and SHIV viruses using Silk fibroin mucoadhesive delivery platform. Efforts to end the AIDS epidemic using anti-retroviral therapy have been widely successful in reducing HIV-related deaths. However, challenges for the prevention of new HIV infections have not been fully resolved. Most new HIV infections occur through mucosal transmission, so it is imperative that HIV prevention platforms are effective at mucosal sites, can be produced inexpensively, and are accessible to vulnerable populations. In these cases, protection against HIV transmission must overcome individual-to-individual variation in the context of mucosal microbiota composition, host metabolic status, and immune response. In this study, we developed a silk fibroin (SF)-based drug delivery platform that encapsulates a potent HIV entry inhibitor Griffithsin (Grft) that can be readily administered into genital mucosal sites for HIV prevention. The SF formulation, capable of holding several anti-HIV proteins, is thermodynamically stable for over one year, can be released over the course of one month, and provides an innovative platform that is safe and effective against transmission of HIV. We demonstrate the safety and efficacy of SF-Grft in both vaginal and rectal compartments using a non-human primate model in vivo and human explant cultures ex vivo. Effective release and mucosal adherence of SF-Grft protected against HIV and SHIV challenge with negligible changes in local microbiota or inflammatory responses. These findings provide support for the development of SF as an effective HIV prevention modality at mucosal sites to help address the global disparity in HIV infection. Conclusion: These studies provide novel insights into new metabolic targets to repair inflamed gut mucosa and impart protection against pathogens at mucosal surfaces through innovative mucoadhesive technology. This dissertation deciphers the molecular, cellular, and microbial components involved in chronic gut inflammatory diseases, identifies molecular mechanisms of reversing mucosal damage, and defines the significance of addressing this complexity to bolster systemic and mucosal health.

Download or read book Metagenomic Systems Biology written by Shailza Singh and published by Springer Nature. This book was released on 2020-12-07 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book serves as an amalgamation of knowledge and principles used in the area of systems and synthetic biology, and targets inter-disciplinary research groups. The readers from diversified areas would be benefited by the valuable resources and information available in one book. Microbiome projects with efficient data handling can fuel progress in the area of microbial synthetic biology by providing a ready to use plug and play chassis. Advances in gene editing technology such as the use of tailor made synthetic transcription factors will further enhance the availability of synthetic devices to be applied in the fields of environment, agriculture and health. The different chapters of the book reviews a broad range of topics, including food microbiome in ecology, use of microbiome in personalized medicine, machine learning in biomedicine. The book also describes ways to harness and exploit the incredible amounts of genomic data. The book is not only limited to medicine but also caters to the needs of environmentalists, biochemical engineers etc. It will be of interest to advanced students and researchers in life sciences, computational biology, microbiology and other inter-disciplinary areas.

Download or read book Systems Biology written by Bernhard Ø. Palsson and published by Cambridge University Press. This book was released on 2006-01-16 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genome sequences are now available that enable us to determine the biological components that make up a cell or an organism. The discipline of systems biology examines how these components interact and form networks, and how the networks generate whole cell functions corresponding to observable phenotypes. This textbook, devoted to systems biology, describes how to model networks, how to determine their properties, and how to relate these to phenotypic functions. The prerequisites are some knowledge of linear algebra and biochemistry. Though the links between the mathematical ideas and biological processes are made clear, the book reflects the irreversible trend of increasing mathematical content in biology education. Therefore to assist both teacher and student, in an associated website Palsson provides problem sets, projects and Powerpoint slides, and keeps the presentation in the book concrete with illustrative material and experimental results.

Download or read book The Social Biology of Microbial Communities written by Institute of Medicine and published by National Academies Press. This book was released on 2013-01-10 with total page 633 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning with the germ theory of disease in the 19th century and extending through most of the 20th century, microbes were believed to live their lives as solitary, unicellular, disease-causing organisms . This perception stemmed from the focus of most investigators on organisms that could be grown in the laboratory as cellular monocultures, often dispersed in liquid, and under ambient conditions of temperature, lighting, and humidity. Most such inquiries were designed to identify microbial pathogens by satisfying Koch's postulates.3 This pathogen-centric approach to the study of microorganisms produced a metaphorical "war" against these microbial invaders waged with antibiotic therapies, while simultaneously obscuring the dynamic relationships that exist among and between host organisms and their associated microorganisms-only a tiny fraction of which act as pathogens. Despite their obvious importance, very little is actually known about the processes and factors that influence the assembly, function, and stability of microbial communities. Gaining this knowledge will require a seismic shift away from the study of individual microbes in isolation to inquiries into the nature of diverse and often complex microbial communities, the forces that shape them, and their relationships with other communities and organisms, including their multicellular hosts. On March 6 and 7, 2012, the Institute of Medicine's (IOM's) Forum on Microbial Threats hosted a public workshop to explore the emerging science of the "social biology" of microbial communities. Workshop presentations and discussions embraced a wide spectrum of topics, experimental systems, and theoretical perspectives representative of the current, multifaceted exploration of the microbial frontier. Participants discussed ecological, evolutionary, and genetic factors contributing to the assembly, function, and stability of microbial communities; how microbial communities adapt and respond to environmental stimuli; theoretical and experimental approaches to advance this nascent field; and potential applications of knowledge gained from the study of microbial communities for the improvement of human, animal, plant, and ecosystem health and toward a deeper understanding of microbial diversity and evolution. The Social Biology of Microbial Communities: Workshop Summary further explains the happenings of the workshop.

Download or read book Microbiome Host Interactions written by D. Dhanasekaran and published by CRC Press. This book was released on 2021-04-01 with total page 863 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microbiota are a promising and fascinating subject in biology because they integrate the microbial communities in humans, animals, plants, and the environment. In humans, microbiota are associated with the gut, skin, and genital, oral, and respiratory organs. The plant microbial community is referred to as "holobiont," and it is influential in the maintenance and health of plants, which themselves play a role in animal health and the environment. The contents of Microbiome-Host Interactions cover all areas as well as new research trends in the fields of plant, animal, human, and environmental microbiome interactions. The book covers microbiota in polar soil environments, in health and disease, in Caenorhabditis elegans, and in agroecosystems, as well as in rice root and actinorhizal root nodules, speleothems, and marine shallow-water hydrothermal vents. Moreover, this book provides comprehensive accounts of advanced next-generation DNA sequencing, metagenomic techniques, high-throughput 16S rRNA sequencing, and understanding nucleic acid sequence data from fungal, algal, viral, bacterial, cyanobacterial, actinobacterial, and archaeal communities using QIIME software (Quantitative Insights into Microbial Ecology). FEATURES Summarizes recent insight in microbiota and host interactions in distinct habitats, including Antarctic, hydrothermal vents, speleothems, oral, skin, gut, feces, reproductive tract, soil, root, root nodules, forests, and mangroves Illustrates the high-throughput amplicon sequencing, computational techniques involved in the microbiota analysis, downstream analysis and visualization, and multivariate analysis commonly used for microbiome analysis Describes probiotics and prebiotics in the composition of the gut microbiota, skin microbiome impact in dermatologic disease prevention, and microbial communities in the reproductive tract of humans and animals Presents information in a reachable way for students, teachers, researchers, microbiologists, computational biologists, and other professionals who are interested in strengthening or enlarging their knowledge about microbiome analysis with next-generation DNA sequencing in the different branches of the sciences

Download or read book Microbial Ecology in States of Health and Disease written by Institute of Medicine and published by National Academies Press. This book was released on 2014-02-18 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: Individually and collectively, resident microbes play important roles in host health and survival. Shaping and shaped by their host environments, these microorganisms form intricate communities that are in a state of dynamic equilibrium. This ecologic and dynamic view of host-microbe interactions is rapidly redefining our view of health and disease. It is now accepted that the vast majority of microbes are, for the most part, not intrinsically harmful, but rather become established as persistent, co-adapted colonists in equilibrium with their environment, providing useful goods and services to their hosts while deriving benefits from these host associations. Disruption of such alliances may have consequences for host health, and investigations in a wide variety of organisms have begun to illuminate the complex and dynamic network of interaction - across the spectrum of hosts, microbes, and environmental niches - that influence the formation, function, and stability of host-associated microbial communities. Microbial Ecology in States of Health and Disease is the summary of a workshop convened by the Institute of Medicine's Forum on Microbial Threats in March 2013 to explore the scientific and therapeutic implications of microbial ecology in states of health and disease. Participants explored host-microbe interactions in humans, animals, and plants; emerging insights into how microbes may influence the development and maintenance of states of health and disease; the effects of environmental change(s) on the formation, function, and stability of microbial communities; and research challenges and opportunities for this emerging field of inquiry.

Download or read book Microbiome and Cancer written by Erle S. Robertson and published by Springer. This book was released on 2019-02-20 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book ventures into a new and exciting area of discovery that directly ties our current knowledge of cancer to the discovery of microorganisms associated with different types of cancers. Recent studies demonstrate that microorganisms are directly linked to the establishment of cancers and that they can also contribute to the initiation, as well as persistence of, the cancers. Microbiome and Cancer covers the current knowledge of microbiome and its association with human cancers. It provides important reading for novices, senior undergraduates in cancer and microbiology, graduate students, junior investigators, residents, fellows and established investigators in the fields of cancer and microbiology. We cover areas related to known, broad concepts in microbiology and how they can relate to the ongoing discoveries of the micro-environment and the changes in the metabolic and physiologic states in that micro-environment, which are important for the ongoing nurturing and survival of the poly-microbial content that dictates activities in that micro-environment. We cover the interactions of microorganisms associated with gastric carcinomas, which are important for driving this particular cancer. Additional areas include oral cancers, skin cancers, ovarian cancers, breast cancers, nasopharyngeal cancers, lung cancers, mesotheliomas, Hodgkin’s and non-Hodgkin’s lymphomas, glioblastoma multiforme, hepatocellular carcinomas, as well as the inflammatory response related to the infectious agents in cancers. This book covers the metabolic changes that occur because of infection and their support for development of cancers, chronic infection and development of therapeutic strategies for detection and control of the infection. The field of microbiome research has exploded over the last five years, and we are now understanding more and more about the context in which microorganisms can contribute to the onset of cancers in humans. The field of microbiome research has demonstrated that the human body has specific biomes for tissues and that changes in these biomes at the specific organ sites can result in disease. These changes can result in dramatic differences in metabolic shifts that, together with genetic mutations, will produce the perfect niche for establishment of the particular infection programmes in that organ site. We are just beginning to understand what those changes are and how they influence the disease state. Overall, we hope to bring together the varying degrees of fluctuations in the microbiome at the major organ sites and how these changes affect the normal cellular processes because of dysregulation, leading to proliferation of the associated tissues.

Download or read book Physiological and Clinical Aspects of Short Chain Fatty Acids written by John H. Cummings and published by Cambridge University Press. This book was released on 2004-12-02 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first comprehensive volume to look at the importance of short-chain fatty acids in digestion, the function of the large intestine and their role in human health. Short-chain fatty acids are the major product of bacterial fermentation of dietary carbohydrates in the human and animal large intestine. They represent the major end products of digestive processes occurring in the caecum and large intestine. As such, they form an important dietary component and it is increasingly recognised that they may have a significant role in protecting against large bowel cancer and in metabolism. Prepared by an international team of contributors who are at the forefront of this area of research, this volume will be an essential source of reference for gastroenterologists, nutritionists and others active in this area.

Download or read book Geriatric Gastroenterology written by C. S. Pitchumoni and published by Springer Science & Business Media. This book was released on 2012-07-26 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt: As aging trends in the United States and Europe in particular are strongly suggestive of increasingly older society, it would be prudent for health care providers to better prepare for such changes. By including physiology, disease, nutrition, pharmacology, pathology, radiology and other relevant associated topics, Geriatric Gastroenterology fills the void in the literature for a volume devoted specifically to gastrointestinal illness in the elderly. This unique volume includes provision of training for current and future generations of physicians to deal with the health problems of older adults. It will also serve as a comprehensive guide to practicing physicians for ease of reference. Relevant to the geriatric age group, the volume covers epidemiology, physiology of aging, gastrointestinal physiology, pharmacology, radiology, pathology, motility disorders, luminal disorders, hepato-biliary disease, systemic manifestations, neoplastic disorders, gastrointestinal bleeding, cancer and medication related interactions and adverse events, all extremely common in older adults; these are often hard to evaluate and judge, especially considering the complex aging physiology. All have become important components of modern medicine. Special emphasis is be given to nutrition and related disorders. Capsule endoscopy and its utility in the geriatric population is also covered. Presented in simple, easy to read style, the volume includes numerous tables, figures and key points enabling ease of understanding. Chapters on imaging and pathology are profusely illustrated. All chapters are written by specialists and include up to date scientific information. Geriatric Gastroenterology is of great utility to residents in internal medicine, fellows in gastroenterology and geriatric medicine as well as gastroenterologists, geriatricians and practicing physicians including primary care physicians caring for older adults.

Download or read book Human Microbiome written by and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metagenomics of the Human Body written by Karen E. Nelson and published by Springer Science & Business Media. This book was released on 2010-11-16 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book brings a completely different perspective than available books by combining the information gained from the human genome with that derived from parallel metagenomic studies, and new results from investigating the effects of these microbes on the host immune system. Although there are a number of books that focus on the human genome that are currently available, there are no books that bring to the forefront the mix of the human genome and the genomes and metagenomes of the microbial species that live within and on us.

Download or read book Gnotobiotics written by Trenton R Schoeb and published by Academic Press. This book was released on 2017-08-11 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gnotobiotics summarizes and analyzes the research conducted on the use of gnotobiotes, providing detailed information regarding actual facility operation and derivation of gnotobiotic animals. In response to the development of new tools for microbiota and microbiome analysis, the increasing recognition of the various roles of microbiota in health and disease, and the consequent expanding demand for gnotobiotic animals for microbiota/microbiome related research, this volume collates the research of this expanding field into one definitive resource. Reviews and defines gnotobiotic animal species Analyzes microbiota in numerous contexts Presents detailed coverage of the protocols and operation of a gnotobiotic facility

Download or read book Encyclopedia of Geobiology written by Joachim Reitner and published by Springer. This book was released on 2011-03-10 with total page 927 pages. Available in PDF, EPUB and Kindle. Book excerpt: The interplay between Geology and Biology has shaped the Earth from the early Precambrian, 4 billion years ago. Moving beyond the borders of the classical core disciplines, Geobiology strives to identify chains of cause-and-effect and synergisms between the geo- and the biospheres that have been driving the evolution of life in modern and ancient environments. Combining modern methods, geobiological information can be extracted not only from visible remains of organisms, but also from organic molecules, rock fabrics, minerals, isotopes and other tracers. An understanding of these processes and their signatures reveals enormous applied potentials with respect to issues of environment protection, public health, energy and resource management. The Encyclopedia of Geobiology has been designed to act as a key reference for students, researchers, teachers, and the informed public and to provide basic, but comprehensible knowledge on this rapidly expanding discipline that sits at the interface between modern geo- and biosciences.

Download or read book Obesity written by Gareth Williams and published by John Wiley & Sons. This book was released on 2009-07-08 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive textbook addresses one of the major public health concerns of our era – obesity. Clearly and simply, Obesity: science to practice provides a balanced, coherent account of obesity: how to define and measure it, its epidemiology, the physiological basis, associated diseases, how to assess, manage and treat it, and also strategies for prevention. The book is generously illustrated, including graphs and flow charts for easy reference. The chapters cite key references so that interested readers may pursue a given topic in more detail. Well presented and thoroughly edited by one of the leading experts in the field, this is the textbook of choice for anyone working in obesity.

Download or read book Methodologies for Metabolomics written by Norbert W. Lutz and published by Cambridge University Press. This book was released on 2013-01-21 with total page 641 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metabolomics, the global characterisation of the small molecule complement involved in metabolism, has evolved into a powerful suite of approaches for understanding the global physiological and pathological processes occurring in biological organisms. The diversity of metabolites, the wide range of metabolic pathways and their divergent biological contexts require a range of methodological strategies and techniques. Methodologies for Metabolomics provides a comprehensive description of the newest methodological approaches in metabolomic research. The most important technologies used to identify and quantify metabolites, including nuclear magnetic resonance and mass spectrometry, are highlighted. The integration of these techniques with classical biological methods is also addressed. Furthermore, the book presents statistical and chemometric methods for evaluation of the resultant data. The broad spectrum of topics includes a vast variety of organisms, samples and diseases, ranging from in vivo metabolomics in humans and animals to in vitro analysis of tissue samples, cultured cells and biofluids.

Download or read book Neuroinflammation and Cognition written by Ashok Kumar and published by Frontiers Media SA. This book was released on 2019-03-22 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aging is one of the major risk factors for the onset and progression of various neurodegenerative diseases. Neuroinflammation is a common feature of virtually every central nervous system disease, and is acknowledged as a likely mediator of cognitive impairments. Systemic inflammation levels are augmented with advanced age and neurodegeneration. The influence of age on neuroinflammatory responses including glial activation, increased production of proinflammatory cytokines, and aberrant neuronal signaling could magnify the deterioration of the central nervous system microenvironment in disease, and may contribute to enhanced cognitive impairment. This eBook is a collection of highly informative original research articles, providing comprehensive aspect of neuroinflammation and possible therapeutic interventions in rescuing cognitive impairments.

Download or read book Statistical Methods in Molecular Biology written by Heejung Bang and published by Humana. This book was released on 2016-08-23 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: This progressive book presents the basic principles of proper statistical analyses. It progresses to more advanced statistical methods in response to rapidly developing technologies and methodologies in the field of molecular biology.