Download or read book Toxin Antitoxin Systems in Pathogenic Bacteria written by Juan Carlos Alonso and published by Mdpi AG. This book was released on 2021-06-17 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bacterial toxin-antitoxin (TA) systems, which are ubiquitously present in bacterial genomes, are not essential for normal cell proliferation. The TA systems regulate fundamental cellular processes, facilitate survival under stress conditions, have essential roles in virulence and represent potential therapeutic targets. These genetic TA loci are also shown to be involved in the maintenance of successful multidrug-resistant mobile genetic elements. The TA systems are classified as types I to VI, according to the nature of the antitoxin and to the mode of toxin inhibition. Type II TA systems encode a labile antitoxin and its stable toxin; degradation of the antitoxin renders a free toxin, which is bacteriostatic by nature. A free toxin generates a reversible state with low metabolic activity (quiescence) by affecting important functions of bacterial cells such as transcription, translation, DNA replication, replication and cell-wall synthesis, biofilm formation, phage predation, the regulation of nucleotide pool, etc., whereas antitoxins are toxin inhibitors. Under stress conditions, the TA systems might form networks. To understand the basis of the unique response of TA systems to stress, the prime causes of the emergence of drug-resistant strains, and their contribution to therapy failure and the development of chronic and recurrent infections, must be known in order to grasp how TA systems contribute to the mechanisms of phenotypic heterogeneity and pathogenesis that will enable the rational development of new treatments for infections caused by pathogens.

Download or read book Bacterial Persistence written by Jan Michiels and published by Humana. This book was released on 2015-10-15 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents a comprehensive collection of methods that have been instrumental to the current understanding of bacterial persisters. Chapters in the book cover topics ranging from general methods for measuring persister levels in Escherichia coli cultures, protocols for the determination of the persister subpopulation in Candida albicans, quantitative measurements of Type I and Type II persisters using ScanLag, to in vitro and in vivo models for the study of the intracellular activity of antibiotics. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Authoritative and cutting-edge, Bacterial Persistence: Methods and Protocols brings together the most respected researchers in bacterial persistence whose studies will remain vital to understanding this field for many years to come.

Download or read book Toxin Antitoxin Systems in Pseudomonas aeruginosa written by Mina Mahmoudi and published by Bentham Science Publishers. This book was released on 2021-05-06 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pseudomonas aeruginosa is known as a persistent bacterial pathogen. Antibiotics are currently the most common bacterial treatment for related infections but cases of microbial resistance are on the rise. Toxin-Antitoxin Systems in Pseudomonas aeruginosa describes one of the most important antimicrobial targets in the bacterium species. The contributors have compiled comprehensive information on the subject. The reference initially acquaints the reader with key topics about P. aeruginosa infection including virulence factors, pathogenicity, epidemiology, laboratory diagnosis and antibiotic resistance. This is followed by detailed chapters on toxin-antitoxin systems which explain their role in the bacterial pathogenesis with reference to P. aeruginosa. The comprehensive information on the subject makes this an ideal reference for newcomers to the field of bacteriology and target discovery. Students of medical microbiology and medical professionals who are interested in the finer details of P. aeruginosa pathogenicity will also be equipped with sufficient information to join the discussion on this topic with fellow researchers.

Download or read book Persister Cells and Infectious Disease written by Kim Lewis and published by Springer Nature. This book was released on 2019-11-13 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is a collection of chapters from the leading experts in the relatively new and burgeoning field of persister cell studies. Persisters play a leading role in the recalcitrance of chronic infections, and enable the development of classical antibiotic resistance. The focus of the book is on studies that provide an understanding of the mechanisms of persister formation, antibiotic tolerance and role in disease, at the molecular level.

Download or read book Stress and Environmental Regulation of Gene Expression and Adaptation in Bacteria written by Frans J. de Bruijn and published by John Wiley & Sons. This book was released on 2016-07-13 with total page 1472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bacteria in various habitats are subject to continuously changing environmental conditions, such as nutrient deprivation, heat and cold stress, UV radiation, oxidative stress, dessication, acid stress, nitrosative stress, cell envelope stress, heavy metal exposure, osmotic stress, and others. In order to survive, they have to respond to these conditions by adapting their physiology through sometimes drastic changes in gene expression. In addition they may adapt by changing their morphology, forming biofilms, fruiting bodies or spores, filaments, Viable But Not Culturable (VBNC) cells or moving away from stress compounds via chemotaxis. Changes in gene expression constitute the main component of the bacterial response to stress and environmental changes, and involve a myriad of different mechanisms, including (alternative) sigma factors, bi- or tri-component regulatory systems, small non-coding RNA’s, chaperones, CHRIS-Cas systems, DNA repair, toxin-antitoxin systems, the stringent response, efflux pumps, alarmones, and modulation of the cell envelope or membranes, to name a few. Many regulatory elements are conserved in different bacteria; however there are endless variations on the theme and novel elements of gene regulation in bacteria inhabiting particular environments are constantly being discovered. Especially in (pathogenic) bacteria colonizing the human body a plethora of bacterial responses to innate stresses such as pH, reactive nitrogen and oxygen species and antibiotic stress are being described. An attempt is made to not only cover model systems but give a broad overview of the stress-responsive regulatory systems in a variety of bacteria, including medically important bacteria, where elucidation of certain aspects of these systems could lead to treatment strategies of the pathogens. Many of the regulatory systems being uncovered are specific, but there is also considerable “cross-talk” between different circuits. Stress and Environmental Regulation of Gene Expression and Adaptation in Bacteria is a comprehensive two-volume work bringing together both review and original research articles on key topics in stress and environmental control of gene expression in bacteria. Volume One contains key overview chapters, as well as content on one/two/three component regulatory systems and stress responses, sigma factors and stress responses, small non-coding RNAs and stress responses, toxin-antitoxin systems and stress responses, stringent response to stress, responses to UV irradiation, SOS and double stranded systems repair systems and stress, adaptation to both oxidative and osmotic stress, and desiccation tolerance and drought stress. Volume Two covers heat shock responses, chaperonins and stress, cold shock responses, adaptation to acid stress, nitrosative stress, and envelope stress, as well as iron homeostasis, metal resistance, quorum sensing, chemotaxis and biofilm formation, and viable but not culturable (VBNC) cells. Covering the full breadth of current stress and environmental control of gene expression studies and expanding it towards future advances in the field, these two volumes are a one-stop reference for (non) medical molecular geneticists interested in gene regulation under stress.

Download or read book Microbial Toxins written by P. Gopalakrishnakone and published by Springer. This book was released on 2018-03-14 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, the field of Toxinology has expanded substantially. On the one hand it studies venomous animals, plants and micro organisms in detail to understand their mode of action on targets. While on the other, it explores the biochemical composition, genomics and proteomics of toxins and venoms to understand their three interaction with life forms (especially humans), development of antidotes and exploring their pharmacological potential. Therefore, Toxinology has deep linkages with biochemistry, molecular biology, anatomy and pharmacology. In addition, there is a fast developing applied subfield, clinical toxinology, which deals with understanding and managing medical effects of toxins on human body. Given the huge impact of toxin-based deaths globally, and the potential of venom in generation of drugs for so-far incurable diseases (for example, Diabetes, Chronic Pain), the continued research and growth of the field is imminent. This has led to the growth of research in the area and the consequent scholarly output by way of publications in journals and books. Despite this ever growing body of literature within biomedical sciences, there is still no all-inclusive reference work available that collects all of the important biochemical, biomedical and clinical insights relating to Toxinology. The Handbook of Toxinology aims to address this gap and cover the field of Toxinology comprehensively.

Download or read book Toxin Antitoxin Systems in Pseudomonas Aeruginosa written by Mina Mahmoudi: Sobhan and published by . This book was released on 2021-05-06 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pseudomonas aeruginosa is known as a persistent bacterial pathogen. Antibiotics are currently the most common bacterial treatment for related infections but cases of microbial resistance are on the rise. Toxin-Antitoxin Systems in Pseudomonas aeruginosa describes one of the most important antimicrobial targets in the bacterium species. The contributors have compiled comprehensive information on the subject. The reference initially acquaints the reader with key topics about P. aeruginosa infection including virulence factors, pathogenicity, epidemiology, laboratory diagnosis and antibiotic resistance. This is followed by detailed chapters on toxin-antitoxin systems which explain their role in the bacterial pathogenesis with reference to P. aeruginosa. The comprehensive information on the subject makes this an ideal reference for newcomers to the field of bacteriology and target discovery. Students of medical microbiology and medical professionals who are interested in the finer details of P. aeruginosa pathogenicity will also be equipped with sufficient information to join the discussion on this topic with fellow researchers.

Download or read book Antibiotic Resistance written by Anthony R.M. Coates and published by Springer Science & Business Media. This book was released on 2012-10-22 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes antibiotic resistance amongst pathogenic bacteria. It starts with an overview of the erosion of the efficacy of antibiotics by resistance and the decrease in the rate of replacement of redundant compounds. The origins of antibiotic resistance are then described. It is proposed that there is a large bacterial resistome which is a collection of all resistance genes and their precursors in both pathogenic and non-pathogenic bacteria. Ongoing resistance surveillance programs are also discussed, together with the perspective of a clinical microbiologist. The book then turns to specific themes such as the most serious area of resistance in pathogens, namely in Gram-negative organisms. The role of combinations of antibiotics in combating resistance emergence is discussed, particularly in the tuberculosis field, and then the importance of non-multiplying and persistent bacteria which are phenotypically resistant to antibiotics and prolong the duration of therapy of antibiotics which leads to poor compliance and resistance emergence. The role of anti-microbial compounds in textiles is covered, with its potential to exacerbate the spread of resistance. Then, efflux pumps are discussed. The final chapter describes the compounds which are in late stage clinical development, illustrating the paucity of the antibiotic pipeline, especially for Gram-negative bacteria.

Download or read book RNA Damage and Repair written by Ioly Kotta-Loizou and published by Springer. This book was released on 2022-07-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ribonucleic acid (RNA) is a macromolecule that plays a central role in cell physiology: RNA molecules act as intermediates between the deoxyribonucleic acid (DNA), where genetic information is stored, and proteins, which perform the necessary functions within the cell. Traditionally, the structural and functional properties of RNA are closely linked to gene expression. However, RNA-based enzymes, called ribozymes, are also involved in catalysis and small RNAs regulate key cellular processes, such as cell growth, division, differentiation, aging and death. RNA is a sensitive macromolecule that can be easily damaged by environmental conditions (ultraviolet radiation, oxidative stress) and biological factors (ribonucleases, ribotoxins, CRISPR-Cas systems). Therefore, cells have developed mechanisms to protect and/or repair RNA molecules. This book presents an overview of the biology of RNA damage, protection and repair in prokaryotes and eukaryotes. Individual chapters cover the expression regulation, enzymology and physiological role of such systems, and link them to important human diseases such as cancer and degenerative diseases.

Download or read book Microbial Megaplasmids written by Edward Schwartz and published by Springer Science & Business Media. This book was released on 2009-01-29 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Megaplasmids are extrachromosomal genetic elements in the size range of 100 kb and larger. They are found in physiologically and phylogenetically diverse groups of bacteria and archaea. By definition, megaplasmids are not essential for the viability of their hosts under all growth conditions, but paradoxically many megaplasmids carry the genetic information for the defining and characteristic traits of the organism in which they reside. Microbial Megaplasmids reviews our knowledge of the extensively studied representatives, such as the catabolic plasmids of the pseudomonads, the rhizobial Sym plasmids, the Ti plasmids of the genus Agrobacterium and the giant enterobacterial virulence plasmids. It also presents snapshots of more recently discovered megaplasmids. The contribution of megaplasmids to the biology of their hosts is described, highlighting the interactions between megaplasmid and chromosomal genes.

Download or read book Biological Mass Spectrometry written by A.L. Burlingame and published by Gulf Professional Publishing. This book was released on 2005-11-28 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes and integrates the techniques of many advances in both chromatographic and mass spectrometric technologies. This book also covers various biophysical applications, such as H/D exchange for study of conformations, protein-protein and protein-metal and ligand interactions. It also describes atto-to-zepto-mole quantitation of 14C and 3H.

Download or read book Prokaryotic Metabolism and Physiology written by Byung Hong Kim and published by Cambridge University Press. This book was released on 2019-05-16 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extensive and up-to-date review of key metabolic processes in bacteria and archaea and how metabolism is regulated under various conditions.

Download or read book Growing and Handling of Bacterial Cultures written by Madhusmita Mishra and published by . This book was released on 2019-12-04 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mycobacterium Tuberculosis Molecular Infection Biology Pathogenesis Diagnostics and New Interventions written by Seyed Ehtesham Hasnain and published by Springer. This book was released on 2019-12-11 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews recent advances in the molecular and infection biology, pathology, and molecular epidemiology of Mycobacterium tuberculosis, as well as the identification and validation of novel molecular drug targets for the treatment of this mycobacterial disease. Despite being completely curable, tuberculosis is still one of the leading global causes of death. M. tuberculosis, the causative organism – one of the smartest pathogens known – adopts highly intelligent strategies for survival and pathogenesis. Presenting a wealth of information on the molecular infection biology of M. tuberculosis, as well as nontuberculous mycobacteria (NTM), the book provides an overview of the functional role of the PE/PPE group of proteins, which is exclusive to the genus Mycobacteria, of host-pathogen interactions, and virulence. It also explores the pathogenesis of the infection, pathology, epidemiology, and diagnosis of NTM. Finally it discusses current and novel approaches in vaccine development against tuberculosis, including the role of nanotechnology. With state-of-the-art contributions from experts in the respective domains, this book is an informative resource for practitioners as well as medical postgraduate students and researchers.

Download or read book Bacterial Biofilms written by Tony Romeo and published by Springer Science & Business Media. This book was released on 2008-02-26 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Throughout the biological world, bacteria thrive predominantly in surface-attached, matrix-enclosed, multicellular communities or biofilms, as opposed to isolated planktonic cells. This choice of lifestyle is not trivial, as it involves major shifts in the use of genetic information and cellular energy, and has profound consequences for bacterial physiology and survival. Growth within a biofilm can thwart immune function and antibiotic therapy and thereby complicate the treatment of infectious diseases, especially chronic and foreign device-associated infections. Modern studies of many important biofilms have advanced well beyond the descriptive stage, and have begun to provide molecular details of the structural, biochemical, and genetic processes that drive biofilm formation and its dispersion. There is much diversity in the details of biofilm development among various species, but there are also commonalities. In most species, environmental and nutritional conditions greatly influence biofilm development. Similar kinds of adhesive molecules often promote biofilm formation in diverse species. Signaling and regulatory processes that drive biofilm development are often conserved, especially among related bacteria. Knowledge of such processes holds great promise for efforts to control biofilm growth and combat biofilm-associated infections. This volume focuses on the biology of biofilms that affect human disease, although it is by no means comprehensive. It opens with chapters that provide the reader with current perspectives on biofilm development, physiology, environmental, and regulatory effects, the role of quorum sensing, and resistance/phenotypic persistence to antimicrobial agents during biofilm growth.

Download or read book Molecular Biology of Bacteriophage T4 written by Jim D. Karam and published by ASM Press. This book was released on 1994 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new text highlights the value of this biological system as a research and teaching tool. The book is a sequel to the 1983 edition and is organized into 6 major sections: DNA metabolism, regulation of gene expression, morphogenesis, structure of selected proteins, host–phage interactions, and laboratory experiments in T4 molecular genetics. Since T4 has played a central role in the development of molecular biology as an academic discipline, the themes presented in this book provide a framework for designing graduate and undergraduate courses in prokaryotic genetics and biochemistry.

Download or read book Bad Bug Book written by Mark Walderhaug and published by Createspace Independent Publishing Platform. This book was released on 2014-01-14 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bad Bug Book 2nd Edition, released in 2012, provides current information about the major known agents that cause foodborne illness.Each chapter in this book is about a pathogen—a bacterium, virus, or parasite—or a natural toxin that can contaminate food and cause illness. The book contains scientific and technical information about the major pathogens that cause these kinds of illnesses.A separate “consumer box” in each chapter provides non-technical information, in everyday language. The boxes describe plainly what can make you sick and, more important, how to prevent it.The information provided in this handbook is abbreviated and general in nature, and is intended for practical use. It is not intended to be a comprehensive scientific or clinical reference.The Bad Bug Book is published by the Center for Food Safety and Applied Nutrition (CFSAN) of the Food and Drug Administration (FDA), U.S. Department of Health and Human Services.