Helicobacter Pylori Infection and Its Interaction with Other Environmental Factors on the Development of Gastric Cancer PDF Download
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Author: Chiao-Jung Tsai
Publisher:
ISBN:
Category :
Languages : en
Pages : 158
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Book Description
Author: Chiao-Jung Tsai
Publisher:
ISBN:
Category :
Languages : en
Pages : 158
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Book Description
Author: Steffen Backert
Publisher: Springer Nature
ISBN: 3031473310
Category : Medical
Languages : en
Pages : 328
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Book Description
This volume explores in detail the molecular biology, genetics and immunology of the bacterium Helicobacter pylori that causes serious gastric diseases such as gastric cancer. The book provides in-depth insights into the mechanisms of H. pylori-induced pathogenicity, gives an overview of how the bacterium colonizes the human gut, how it manages to persist in the body and which factors play a role in the development of H. pylori-induced gastric cancer. Furthermore, the interaction between the Gram-negative bacterium and the human gut microbiome is explored, and clinical management and treatment strategies to combat gastric cancer are discussed. Helicobacter pylori is an extremely successful pathogen that persistently colonizes the gut of about 50% of the world’s population. H. pylori and its human host share a long co-evolutionary relationship that dates back for at least last 100,000 years and possibly longer. Infection by this bacterium is a high-risk factor for the development of gastric diseases, including gastric cancer. Gastric cancer is associated with high morbidity and mortality and represents the 5th most common malignant tumour and the 4th leading cause of cancer-related death worldwide. H. pylori is the first bacterium that has been classified as a type-I carcinogen by the International Agency for Research on Cancer (IARC). Recent research progress identified crucial bacterial, host and environmental factors which control H. pylori-induced gastric malignancy. New studies also suggest that specific human germline mutations and other genetic aberrations have an important impact on H. pylori-induced pathology. In this volume, all these recently discovered mechanisms are reviewed in the light of gastric cancer development, and H. pylori epidemiology, virulence factors, immune evasion, pathophysiology, cancer signalling and novel therapeutic protocols are presented. This volume is aimed at researchers in the fields of immunology, genetics, microbiology and medicine who are interested in the detailed mechanisms of the pathogenicity of this carcinogenic stomach bacterium.
Author: Mohamed Tarek Badr
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Abstract: Helicobacter pylori is a gram-negative bacterium that colonizes the human gastric mucosa and can lead to gastric inflammation, ulcers, and stomach cancer. Due to the increase in H. pylori antimicrobial resistance new methods to identify the molecular mechanisms of H. pylori-induced pathology are urgently needed. Here we utilized a computational biology approach, harnessing genome-wide association and gene expression studies to identify genes and pathways determining disease development. We mined gene expression data related to H. pylori-infection and its complications from publicly available databases to identify four human datasets as discovery datasets and used two different multi-cohort analysis pipelines to define a H. pylori-induced gene signature. An initial Helicobacter-signature was curated using the MetaIntegrator pipeline and validated in cell line model datasets. With this approach we identified cell line models that best match gene regulation in human pathology. A second analysis pipeline through NetworkAnalyst was used to refine our initial signature. This approach defined a 55-gene signature that is stably deregulated in disease conditions. The 55-gene signature was validated in datasets from human gastric adenocarcinomas and could separate tumor from normal tissue. As only a small number of H. pylori patients develop cancer, this gene-signature must interact with other host and environmental factors to initiate tumorigenesis. We tested for possible interactions between our curated gene signature and host genomic background mutations and polymorphisms by integrating genome-wide association studies (GWAS) and known oncogenes. We analyzed public databases to identify genes harboring single nucleotide polymorphisms (SNPs) associated with gastric pathologies and driver genes in gastric cancers. Using this approach, we identified 37 genes from GWA studies and 61 oncogenes, which were used with our 55-gene signature to map gene-gene interaction networks. In conclusion, our analysis defines a unique gene signature driven by H. pylori-infection at early phases and that remains relevant through different stages of pathology up to gastric cancer, a stage where H. pylori itself is rarely detectable. Furthermore, this signature elucidates many factors of host gene and pathway regulation in infection and can be used as a target for drug repurposing and testing of infection models suitability to investigate human infection
Author: Paola Tonino
Publisher: BoD – Books on Demand
ISBN: 9533073756
Category : Medical
Languages : en
Pages : 312
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Book Description
This book is a comprehensive overview of invited contributions on Helicobacter pylori infection in gastritis and gastric carcinogenesis. The first part of the book covers topics related to the pathophysiology of gastric mucosal defense system and gastritis including the gastroprotective function of the mucus, the capsaicin-sensitive afferent nerves and the oxidative stress pathway involved in inflammation, apoptosis and autophagy in H. pylori related gastritis. The next chapters deal with molecular pathogenesis and treatment, which consider the role of neuroendocrine cells in gastric disease, DNA methylation in H. pylori infection, the role of antioxidants and phytotherapy in gastric disease. The final part presents the effects of cancer risk factors associated with H. pylori infection. These chapters discuss the serum pepsinogen test, K-ras mutations, cell kinetics, and H. pylori lipopolysaccharide, as well as the roles of several bacterial genes (cagA, cagT, vacA and dupA) as virulence factors in gastric cancer, and the gastrokine-1 protein in cancer progression.
Author: Julie Parsonnet
Publisher:
ISBN:
Category : Medical
Languages : en
Pages : 488
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Book Description
Historically, the study of infection has focused on acute illnesses and their treatment. Infection, however, is not simply an acute process; microbial agents thrive in the human body throughout life. The unrecognized, intimate relationship we share with microorganisms is a critical factor in longevity and health. In recent years, it has become apparent that some cancers may be attributable to underlying chronic infection. Fortunately, infectious diseases are often treatable or preventable. Also, the composition of infectious agents is far less complex than that of humans. Thus the link between infection and cancer may offer insight into the pathogenesis and prevention of all cancers. This book, authored by some of the world's leaders in microbiology, virology, biochemistry, and pathology, provides an overview of oncogenic mechanisms imputed to infection. Individual chapters examine the epidemiologic, clinical and molecular links between specific infectious agents and cancer, and address methods of disease prevention. Microbiologists, cancer biologists, pathologists, oncologists, and infectious disease specialists interested in the etiology of malignancy will find this book an indispensable addition to their libraries.
Author: Timothy Wang
Publisher: Springer Science & Business Media
ISBN: 0387691820
Category : Medical
Languages : en
Pages : 654
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Book Description
As someone who has spent nearly half his life wondering about the relationship between Helicobacter and gastric cancer, I find this textbook on the subject exciting and timely. In fact, I am not aware of any other volume that has been able to distil so much new knowledge into such a comprehensive account of a poorly understood field. Taking my own view, as a scientist placed in the middle of the spectrum between basic science and clinical medicine, I can see that the editors, Jim Fox, Andy Giraud, and Timothy Wang, provide a broad mix of expertise, which ensures that the subject is treated with the right balance. From clinicopathologic observations in humans, to epidemiology, through animal models, to molecular and cell biology, this team has hit the mark for most readers. Fox is a well-known leader in animal models with broad expertise. He pioneered the field with observations on Helicobacter species in animals, from the time when only one spiral gastric bac- rium was known, “Campylobacter pyloridis. ” Fox partners with Wang, whose team recently announced a dramatic advance in the field of carcinogenesis—the obser- tion that bone marrow–derived stem cells participate in the changes that become cancer. To this nice mix has been added Andy Giraud from my own country, who brings to the table some remarkable genetic models of gastric cancer based on alterations in the gp130/stat3-signaling pathway.
Author: Bruna Maria Roesler
Publisher: BoD – Books on Demand
ISBN: 183881146X
Category : Science
Languages : en
Pages : 136
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Book Description
Helicobacter pylori is an universally distributed bacterium which affects more than half of the world population. H. pylori infection causes persistent inflammation with different clinical outcomes in humans, including chronic gastritis, peptic ulcer disease and gastric cancer. The infection has also been associated with several extradigestive disorders. In this book there is a comprehensive overview of contributors on H. pylori infection in diverse areas, including virulence factors of H. pylori and their importance for the clinical outcome of the diseases, discussions about the principal therapeutic regimens of bacterium eradication, also considering the antimicrobial resistance. H. pylori is clearly a very interesting bacteria and great studies and discussions about all its aspects are welcome to the medical and scientific communities.
Author:
Publisher: Academic Press
ISBN: 0124159761
Category : Science
Languages : en
Pages : 719
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Book Description
The second edition of Microbiology of Waterborne Diseases describes the diseases associated with water, their causative agents and the ways in which they gain access to water systems. The book is divided into sections covering bacteria, protozoa, and viruses. Other sections detail methods for detecting and identifying waterborne microorganisms, and the ways in which they are removed from water, including chlorine, ozone, and ultraviolet disinfection. The second edition of this handbook has been updated with information on biofilms and antimicrobial resistance. The impact of global warming and climate change phenomena on waterborne illnesses are also discussed. This book serves as an indispensable reference for public health microbiologists, water utility scientists, research water pollution microbiologists environmental health officers, consultants in communicable disease control and microbial water pollution students. Focuses on the microorganisms of most significance to public health, including E. coli, cryptosporidium, and enterovirus Highlights the basic microbiology, clinical features, survival in the environment, and gives a risk assessment for each pathogen Contains new material on antimicrobial resistance and biofilms Covers drinking water and both marine and freshwater recreational bathing waters
Author: Bruna Maria Roesler
Publisher: BoD – Books on Demand
ISBN: 9535112392
Category : Medical
Languages : en
Pages : 394
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Book Description
Helicobacter pylori is a universally distributed bacterium which affects more than half of the world population. The infection is associated with the development of various diseases of the upper gastrointestinal tract, besides extradigestive diseases. This book is a comprehensive overview of contributors on H. pylori infection in several areas. Its chapters were divided into sections concerning general aspects of H. pylori infection, immunopathology and genetic diversity, questions regarding possible routes of bacterium transmission, the importance of the strains characteristics in the development of gastric cancer and the possibilities of prevention, H. pylori infection in children, the possible association between its infection and extradigestive diseases, and the principal therapeutic regimens of bacterium eradication, considering the antimicrobial resistance.
Author: Nicole Tegtmeyer
Publisher: Springer
ISBN: 3319505203
Category : Medical
Languages : en
Pages : 364
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Book Description
This volume reviews the current state of research concerning bacterial virulence factors and the infection biology of Helicobacter pylori, which is the leading cause of peptic ulcers and gastric cancer worldwide. The chapters include cutting-edge findings on this fascinating microbe and discuss the general strategies of H. pylori infection and persistence, news on important H. pylori virulence factors, crosstalk with the microbiota, hot novel models and signaling mechanisms, risk factors of gastric disease and stomach cancer, and the impact of H. pylori infection on non-gastric diseases. Written by internationally respected scientists, this book will appeal to clinicians, researchers and advanced students alike.
