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Author: Frigerio Publisher: Springer Science & Business Media ISBN: 1461341515 Category : Science Languages : en Pages : 527
Book Description
When a dose of drug is administered, three main phases of drug action may be distingushed. In the "pharmaceutical" phase the dosage form disintegrates, the active substance dissolves and becomes available for absorption. The second phase ("pharmaco kinetic" phase) includes absorption, distribution, metabolism, and excretion. That fraction of the dose which finally reaches the circulation after absorption will be available for biological action in the third, or "pharmacodynamic" phase when the drug reaches the target tissues and a drug-receptor interaction takes place. The objectives in studies of drug metabolism are: (a) to identify the pathways by which drugs are transformed in the body; (b) to ascertain quantitatively the importance of each pathway and intermediate; (c) to identify and quantify endogenous constituents influenced by the drug or its metabolites which may interfere with common metabolic processes. Since metabolites usually differ from their precursors by only a single chemical group, the resulting metabolic pathways generally consist of a series of closely related compounds. Mass spectrometry is uniquely suited for the analysis of drugs and metabolites for several reasons: only a minimal amount of sample preparation is needed, closely related compounds can be analyzed in a single step, structures can often be deduced directly from the mass spectra without the need for pure reference spectra, and constituents can be quantified with relative ease even when present in fractional nanogram quantity.
Author: Frigerio Publisher: Springer Science & Business Media ISBN: 1461341515 Category : Science Languages : en Pages : 527
Book Description
When a dose of drug is administered, three main phases of drug action may be distingushed. In the "pharmaceutical" phase the dosage form disintegrates, the active substance dissolves and becomes available for absorption. The second phase ("pharmaco kinetic" phase) includes absorption, distribution, metabolism, and excretion. That fraction of the dose which finally reaches the circulation after absorption will be available for biological action in the third, or "pharmacodynamic" phase when the drug reaches the target tissues and a drug-receptor interaction takes place. The objectives in studies of drug metabolism are: (a) to identify the pathways by which drugs are transformed in the body; (b) to ascertain quantitatively the importance of each pathway and intermediate; (c) to identify and quantify endogenous constituents influenced by the drug or its metabolites which may interfere with common metabolic processes. Since metabolites usually differ from their precursors by only a single chemical group, the resulting metabolic pathways generally consist of a series of closely related compounds. Mass spectrometry is uniquely suited for the analysis of drugs and metabolites for several reasons: only a minimal amount of sample preparation is needed, closely related compounds can be analyzed in a single step, structures can often be deduced directly from the mass spectra without the need for pure reference spectra, and constituents can be quantified with relative ease even when present in fractional nanogram quantity.
Author: Walter A. Korfmacher Publisher: CRC Press ISBN: 0203500040 Category : Medical Languages : en Pages : 385
Book Description
Mass spectrometry (MS) is fast becoming the premier tool for analyzing various drug metabolism samples in the early phases of drug discovery and research. Introducing the newer, more powerful MS equipment and exploring new applications for using them, this book provides a state-of-the-art look at this promising field. Using Mass Spectrometry
Author: Ragu Ramanathan Publisher: John Wiley & Sons ISBN: 111821157X Category : Science Languages : en Pages : 326
Book Description
This timely reference discusses mass spectrometry in drug metabolism and pharmacokinetic studies. With contributions by professionals from the pharmaceutical industry, this book begins with a review of current mass spectrometry techniques and applications, followed by discussions of various methods for using MS in drug metabolism studies and pharmacokinetics. Highlighting the critical importance of ADME studies for understanding how a drug is absorbed, distributed, metabolized, and excreted by the body, the book s focuses on the use of LC/MS and MALDI-MS. This is a valuable reference for scientists in the pharmaceutical industry, medicine, academia, and even those working in homeland defense.
Author: Mike S. Lee Publisher: John Wiley & Sons ISBN: 0470934697 Category : Science Languages : en Pages : 648
Book Description
This book examines the background, industrial context, process, analytical methodology, and technology of metabolite identification. It emphasizes the applications of metabolite identification in drug research. While primarily a textbook, the book also functions as a comprehensive reference to those in the industry. The authors have worked closely together and combine complementary backgrounds to bring technical and cultural awareness to this very important endeavor while serving to address needs within academia and industry It also contains a variety of problem sets following specific sections in the text.
Author: Walter A. Korfmacher Publisher: CRC Press ISBN: 1420092219 Category : Medical Languages : en Pages : 442
Book Description
The first edition of this now classic work helped to establish mass spectrometry as the premier tool for drug metabolism studies. Completely rewritten from start to finish, Using Mass Spectrometry for Drug Metabolism Studies, Second Edition brings medicinal chemists and mass spectrometry professionals up to speed with the rapid advances in the fiel
Author: David T. Rossi Publisher: CRC Press ISBN: 9781420002478 Category : Medical Languages : en Pages : 436
Book Description
Mass Spectrometry in Drug Discovery summarizes the theory, instrumentation, techniques, and application of mass spectrometry and atmospheric pressure ionization to screening, evaluating, and improving the performance and quality of drug candidates. It provides time- and cost-efficient approaches for the generation and analysis of effective pharmaceuticals, covers advances in combinatorial chemistry, molecular biology, bioanalysis automation, and computing, and demonstrates the use of mass spectrometry in the assessment of disease states, drug targets, and potential drug agents.
Author: Swapan Chowdhury Publisher: Elsevier ISBN: 0080456065 Category : Science Languages : en Pages : 355
Book Description
As new techniques of transferring from liquid to gas phase and measuring masses of drug molecules and metabolites become more prevalent, so do the technical challenges of putting these techniques into proper use, as well as the task of consolidating emerging applications. Identification and Quantification of Drugs, Metabolites and Metabolizing Enzymes by LC-MS, Volume 6 fills the gap in the lack of presently available literature by providing a critical review in the current use of liquid chromatography-mass spectrometry (LC-MS) in drug discovery and development. With chapters written by experts with a wide range of practical experience from the pharmaceutical industry, emphasis is placed on techniques and applications. The book also includes chapters on how to utilize LC-MS instrumentation for current drug metabolism problems. This book is intended for those beginning to use LC-MS for drug metabolism studies as well as for those considered advanced practitioners. * Introduces readers to the practical applications of modern liquid chromatography-mass spectrometry (LC-MS) in a wide range of drug metabolism studies·* Provides a comprehensive description of different forms of metabolites, with detailed discussion on the wide range of methodologies used to identify them* Highlights problems associated with drug quantification and offers practical solutions
Author: Hye Suk Lee Publisher: MDPI ISBN: 3038979163 Category : Medical Languages : en Pages : 230
Book Description
Drug metabolism/pharmacokinetics and drug interaction studies have been extensively carried out in order to secure the druggability and safety of new chemical entities throughout the development of new drugs. Recently, drug metabolism and transport by phase II drug metabolizing enzymes and drug transporters, respectively, as well as phase I drug metabolizing enzymes, have been studied. A combination of biochemical advances in the function and regulation of drug metabolizing enzymes and automated analytical technologies are revolutionizing drug metabolism research. There are also potential drug–drug interactions with co-administered drugs due to inhibition and/or induction of drug metabolic enzymes and drug transporters. In addition, drug interaction studies have been actively performed to develop substrate cocktails that do not interfere with each other and a simultaneous analytical method of substrate drugs and their metabolites using a tandem mass spectrometer. This Special Issue has the aim of highlighting current progress in drug metabolism/pharmacokinetics, drug interactions, and bioanalysis.
Author: Frigerio
Author: Frigerio
Author: Walter A. Korfmacher
Author: Ragu Ramanathan
Author: Mike S. Lee
Author: Alberto Frigerio
Author: Walter A. Korfmacher
Author: 3Island Press
Author: David T. Rossi
Author: Swapan Chowdhury
Author: Hye Suk Lee