Download or read book Role of Aryl Hydrocarbon Receptor in Circadian Rhythm A Novel Pathway to Dioxin Toxicity written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Regulation of Circadian Clocks and Metabolism by Aryl Hydrocarbon Receptor written by Canxin Xu and published by . This book was released on 2014 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aryl hydrocarbon receptor (AhR), a ligand-dependent transcription factor, plays a crucial role in regulation of xenobiotic metabolism. AhR is also involved in dioxin-induced metabolic disorders and alteration of circadian rhythm. Furthermore, circadian clock disruption and metabolic dysfunction are integrally associated with each other. This study was designed to understand the mechanisms by which AhR contributes to regulation of circadian clocks, fat metabolism and glucose homeostasis. Collectively, these data suggest that AhR signaling could be a potential target for treatment of obesity and type 2 diabetes, and AhR antagonist may be developed into a drug for these metabolic diseases.
Download or read book Mechanisms of Aryl Hydrocarbon Receptor mediated Regulation of Gene Expression and the Cell Cycle written by Jennifer L. Marlowe and published by . This book was released on 2006 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of this dissertation is the discovery of novel mechanisms and pathways of gene regulation by the aryl hydrocarbon receptor (AHR), primarily regarding the role of this protein in modulating cell cycle progression. The AHR is a member of the PAS (Per-Arnt-Sim) superfamily of receptors, which mediate responses to environmental stresses such as hypoxia and circadian rhythm, and control basic physiologic processes like vascular development, learning, and neurogenesis. The AHR protein was discovered by virtue of its high affinity interaction with the persistent environmental contaminant 2,3,7,8-tetrachlorodibenzo- p-dioxin (TCDD), and is now known as the primary mediator of the toxic effects of this and hundreds of other HAH and PAH ligands. The mechanisms by which the AHR acts to mediate toxicity of these compounds include the activity of the AHR as a potent transcriptional activator. The ligand-bound AHR, with its dimerization-binding partner ARNT, upregulates the expression of a battery of genes that function in the metabolism of PAH and HAH compounds. However, the diversity of toxic responses mediated by compounds such as TCDD are not adequately explained by the expression of this battery of genes. One of the primary roles of the AHR, both from a physiological and toxicological standpoint, is the control of cell cycle progression. The AHR may affect cell proliferation, differentiation, or apoptosis depending on the cell type examined, and the mechanisms of these effects remain unclear. Literally hundreds of genes have been implicated as being regulated either directly or indirectly by the AHR, and many of these genes are related to aspects of cell cycle control. The goal of this dissertation is to explore mechanisms by which the AHR modulates the cell cycle through the investigation of novel gene targets of the receptor. Chapter 2 summarizes the current body of knowledge regarding the AHR, its ligands, and perturbations of the cell cycle. Chapter 3 investigates a mechanism whereby the AHR is able to repress the expression of specific cell cycle-regulated genes through its interaction with the retinoblastoma protein, a tumor suppressor and major component of the G1/S checkpoint control mechanism. Chapter 4 explores an interaction between the AHR and E2F proteins, also major regulatory components of S-phase progression and DNA replication, and the constitutive activity of the AHR in maintaining basal expression levels of a large number of E2F-regulated genes. Finally, Chapter 5 outlines the identification of novel promoter targets of the AHR using chromatin immunoprecipitation and promoter tiling arrays. The results presented throughout this work show the diversity of AHR functions related both to toxicological endpoints and normal cell physiology, and illustrate the ability of this important transcription factor to regulate the expression of a large number of genes by a variety of distinctive mechanisms.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2007 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Translational Immunotherapy of Brain Tumors written by John H. Sampson and published by Academic Press. This book was released on 2017-02-06 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: Translational Immunotherapy of Brain Tumors gives researchers and practitioners an up-to-date and comprehensive overview of the field. Chapters include adoptive immunotherapy, immunosuppression, CAR therapy of brain tumors, and dendritic cell therapy for brain tumors. Very few agents have been shown to be efficacious in the treatment of malignant gliomas. Recently, there have been a number of studies demonstrating the potential success of immunotherapy for brain tumors. Immunotherapeutics are becoming the most frequent drugs to be used in cancer therapy. These new breakthroughs, now approved by the FDA, are a part of multiple phase III international trials and ongoing research in malignant glioma, meaning that the information in this cutting-edge book will be of great importance to practitioners and researchers alike. Comprehensive overview, providing an update on immunology, translational immunotherapy, and clinical trials relating to malignant gliomas Edited by a prominent neurosurgeon with contributions by leading researchers in the field Ideal resource for researchers and practitioners interested in learning about mechanisms that use the immune system to treat brain tumors
Download or read book Molecular Docking and Molecular Dynamics written by Amalia Stefaniu and published by BoD – Books on Demand. This book was released on 2019-12-18 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book clearly explains the principles of in silico tools of molecular docking and molecular dynamics. It provides examples of algorithms and procedures proposed by different software programs for visualizing and identifying potential interactions in complexes of biochemical interest. The book is structured in six chapters, each of which discusses different molecular simulation methodologies and provides concrete examples of complexes interactions. In each chapter authors give an overview of the treated subject, a description of the methodologies used, and a discussion of the results. The authors describe computational ways to achieve a rational design of bioactive compounds with various therapeutic applications, including antitumoral agents, antitubercular drugs, nonsteroidal anti-inflammatory drugs, and radiopharmaceuticals.
Download or read book Scientific Frontiers in Developmental Toxicology and Risk Assessment written by National Research Council and published by National Academies Press. This book was released on 2000-12-21 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific Frontiers in Developmental Toxicology and Risk Assessment reviews advances made during the last 10-15 years in fields such as developmental biology, molecular biology, and genetics. It describes a novel approach for how these advances might be used in combination with existing methodologies to further the understanding of mechanisms of developmental toxicity, to improve the assessment of chemicals for their ability to cause developmental toxicity, and to improve risk assessment for developmental defects. For example, based on the recent advances, even the smallest, simplest laboratory animals such as the fruit fly, roundworm, and zebrafish might be able to serve as developmental toxicological models for human biological systems. Use of such organisms might allow for rapid and inexpensive testing of large numbers of chemicals for their potential to cause developmental toxicity; presently, there are little or no developmental toxicity data available for the majority of natural and manufactured chemicals in use. This new approach to developmental toxicology and risk assessment will require simultaneous research on several fronts by experts from multiple scientific disciplines, including developmental toxicologists, developmental biologists, geneticists, epidemiologists, and biostatisticians.
Download or read book Circadian Pharmacokinetics written by Baojian Wu and published by Springer Nature. This book was released on 2020-10-28 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the recent advances for the understanding of circadian clock system in the regulation of drug metabolism and pharmacokinetics. Basic knowledge in the field of circadian clock and pharmacokinetics are systemically introduced to make it easier for readers to understand the entire book's contents. The rhythmic expression of DMEs (drug-metabolizing enzymes) and transporters are summarized, and the underlying mechanisms thereof (i.e., regulation by circadian oscillators) are discussed. Typically, evidence for the DME- and transporter-mediated chronopharmacokinetics, chronotoxicity and chronoefficacy are highlighted in this book.
Download or read book Endocrine Disruption and Human Health written by Philippa D. Darbre and published by Academic Press. This book was released on 2015-03-21 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Endocrine Disruption and Human Health starts with an overview of what endocrine disruptors are, the issues surrounding them, and the source of these chemicals in the ecosystem. This is followed by an overview of the mechanisms of action and assay systems. The third section includes chapters written by specialists on different aspects of concern for the effects of endocrine disruption on human health. Finally, the authors consider the risk assessment of endocrine disruptors and the pertinent regulation developed by the EU, the US FDA, as well as REACH and NGOs. The book has been written for researchers and research clinicians interested in learning about the actions of endocrine disruptors and current evidence justifying concerns for human health but is useful for those approaching the subject for the first time, graduate students, and advanced undergraduate students. - Provides readers with access to a range of information from the basic mechanisms and assays to cutting-edge research investigating concerns for human health - Presents a comprehensive, translational look at all aspects of endocrine disruption and its effects on human health - Offers guidance on the risk assessment of endocrine disruptors and current relevant regulatory considerations
Download or read book Animal Models of Cognitive Impairment written by Edward D. Levin and published by CRC Press. This book was released on 2006-06-22 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: The costs associated with a drug's clinical trials are so significant that it has become necessary to validate both its safety and efficacy in animal models prior to the continued study of the drug in humans. Featuring contributions from distinguished researchers in the field of cognitive therapy research, Animal Models of Cognitive Impairmen
Download or read book Regenerative Pharmacology written by George J. Christ and published by Cambridge University Press. This book was released on 2013-04-15 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: A state-of-the-art primer on the role of pharmacological sciences in regenerative medicine, for advanced students, postdoctoral fellows, and researchers.
Download or read book Chronotherapeutics written by P. H. Redfern and published by Pharmaceutical Press. This book was released on 2003 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: In nature, many physical processes are governed by the passage of time. The study of these processes - chronobiology - reveals rhythmic patterns which may be yearly, monthly, daily or more frequent. Novel drug delivery systems are currently being delivered that will release varying quantities of a drug at optimum times to coincide with these rhythmic patterns.Chronotherapeutics considers the pharmaceutical and therapeutic implications associated with biological clocks. The book presents a comprehensive discussion of specific diseases that are time dependent, and the drugs and new drug formulations that can be used as treatments.Written by leading international experts in the field, Chronotherapeutics provides up-to-date information on chronobiology for non-chronobiologists in pharmaceutical and medical sciences. Peter Redfern is Professor of Pharmacology at the University of Bath, UK.
Download or read book Translational Toxicology written by Claude L. Hughes and published by Humana Press. This book was released on 2016-03-23 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bringing together a distinguished interdisciplinary team of contributors, this volume provides a comprehensive exploration of translational toxicology—a systematic approach to developing therapeutic interventions that can protect against, mitigate, or reverse the effects of exposures. In particular, the book addresses modes of action and biomarkers, developmental risks of exposures, and potential translational toxicology therapeutics. The result is a compelling application of developmental toxicology in a new therapeutic discipline that is destined to become part of standard medical practice. Translational Toxicology: Defining a New Therapeutic Discipline is an essential text for regulatory authorities, scientists, and physicians who are concerned with environmental exposures, public health, nutrition, and pharmaceutical research and development. Basic science, epidemiological, and clinical investigators will also find this book a significant resource.
Download or read book Targeting the Broadly Pathogenic Kynurenine Pathway written by Sandeep Mittal and published by Springer. This book was released on 2015-11-18 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tryptophan metabolism via kynurenine pathway plays a critical role in both health and a variety of human diseases. This book highlights the known associations between kynurenine pathway and various disease states, as well as examines the current status of drug development and clinical trials of compounds known to alter tryptophan metabolism. The research plays a critical role in molecular targeted therapies directed at altering the kynurenine pathway of tryptophan metabolism. The initial and rate-limiting step of tryptophan metabolism is mediated by one of two enzymes, tryptophan-2,3-dioxygenase (TDO; predominantly in the liver, but also in the brain) and indoleamine-2,3-dioxygenase (IDO; in a host of tissues in response to immune activation). Targeting the enzymes IDO and TDO, as well as other downstream effectors would therefore be likely to generate novel treatment options that would be helpful in a wide variety of clinical settings. This book provides a unique bridge between basic mechanistic understanding of the role of the kynurenine pathway with translational applications and clinical relevance. It will explore the indications that tryptophan metabolism is a potential biomarker of disease activity, can contribute to local and possibly systemic immune suppression in cancer, and is an attractive target for which a variety of inhibitors are readily available.
Download or read book Current Topics in Developmental Biology written by and published by Academic Press. This book was released on 1990-07-24 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current Topics in Developmental Biology
Download or read book Cellular and Molecular Toxicology written by J.P. Vanden Heuvel and published by Gulf Professional Publishing. This book was released on 2002-02-14 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 14 in the series Comprehensive Toxicology extends and complements the previously published 13-volume set. This volume will be available separately. Toxicology is the study of the nature and actions of chemicals on biological systems. In more primitive times, it really was the study of poisons. However, in the early 1500s, it was apparent to Paracelsus that "the dose differentiates a poison and a remedy". Clearly, the two most important tenets of toxicology were established during that time. The level of exposure (dose) and the duration of exposure (time) will determine the degree and nature of a toxicological response. Since that time the discipline of toxicology has made major advances in identifying and characterizing toxicants. The growth of toxicology as a scientific discipline has been driven to a large extent by the use of extremely powerful molecular and cell biology techniques. The overall aim of this volume is to demonstrate how these advances are being used to elucidate causal pathways (or linkages) for potential adverse health consequences of human exposure to environmental chemicals or radiation. A unique feature of this volume is its illustration of how carefully-designed studies of the molecular mechanisms of chemical action provide not only understanding of the potential toxicity of the chemical under investigation, but also new insights into the functioning of the biological system used as an experimental model. Each chapter contains a listing of major peer-reviewed articles and reviews and useful web-sites. In addition, each chapter contains a broad introductory section that outlines the subsequent sections. These Introductory and Overview sections are designed to be stand alone chapters, and may be packaged as a textbook in graduate level courses.
Download or read book Bitumens and Bitumen Emissions and Some N and S heterocyclic Polycyclic Aromatic Hydrocarbons written by IARC Working Group on the Evaluation of Carcinogenic Risks to Humans and published by World Health Organization. This book was released on 2013 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume of the IARC Monographs provides evaluations of the carcinogenicity of bitumens and their emissions, the N-heterocyclic polycyclic aromatic hydrocarbons benz[a]acridine, benz[c]acridine, dibenz[a,h]acridine, dibenz[a,j]acridine, dibenz[c,h]acridine, carbazole and 7H-dibenzo[c,g]carbazole, as well as the S-hetrocyclic polycyclic aromatic hydrocarbons benzo[b]naphtho[2,1-d]thiophene and dibenzothiophene. Bitumens are produced by distillation of crude oil during petroleum refining, and also occur naturally. Bitumens can be divided into six broad classes, according to their physical properties and specifications required for different applications. The major use (about 80%) of bitumens is for road paving; other uses include roofing, waterproofing, sealing and painting. The term "bitumen" should not be confused with "asphalt", which refers to the mixture of bitumen (4-10% by weight), small stones, sand and filler used for road paving. Bitumens are complex mixtures that contain a large number of organic chemical compounds. Application of bitumens may generate emissions (fumes and vapours) that may contain, among volatile and non-volatile compounds, a number of known or probable carcinogens. An IARC Monographs Working Group reviewed epidemiological evidence, animal bioassays, and mechanistic and other relevant data to reach conclusions as to the carcinogenic hazard to humans of various occupations that entail exposure to bitumens and bitumen emissions, including road paving, roofing, and application of mastic asphalt, and to various heterocyclic polycyclic aromatic compounds.
