Abc Transporters And Multidrug Resistance

A comprehensive review of the most current scientific research on ABC transporters and multidrug resistance ATP-binding cassette transporter genes (ABC transporters) are known to play a crucial role in the development of multidrug resistance (MDR). MDR is the ability of pathologic cells, such as tumors, to withstand chemicals designed to target and destroy such cells. In MDR, patients who are on medication eventually develop resistance to not only the drug they are taking, but to several different types of drugs. ABC Transporters and Multidrug Resistance offers an essential resource for pharmaceutical researchers who are working to discover drugs to counteract multidrug resistance in diseases such as cancer. In one comprehensive volume, this book contains a collection of the most current knowledge on the involvement of ABC transporters in drug transport and resistance. This comprehensive volume provides an overview on the description of the structure, the genome, normal tissue expression, physiological aspect, and mechanism of action of the ABC protein. The expert contributors explore the expression, detection, and implications of ABC proteins in hematological malignancies and solid tumors and ABC proteins and pathogenic microorganisms. This volume also explains MDR modulation through inhibition of ABC transporters and the design of inhibitors and mechanism of action. In addition, the book offers essential information on the biological and clinical aspect of multidrug resistance.

This critical review volume explores the theme of ABC transporters in the context of basic cancer research and its role in drug-resistant tumors. The chapters provided complement basic research by including investigations from translational applications to clinical oncology. The development of resistance is a major obstacle in cancer chemotherapy and the field has been moving rapidly in terms of determining the mechanisms for blocking ABC transporter-mediated drug efflux by specific inhibitors and thereby overcoming multidrug resistance. The volume covers these issues in careful detail. Additional topics include the relevance of ABC transporters in resistance to novel and established anticancer drugs and prognosis of patients to compounds, compounds used in photodynamic therapy, tyrosine kinase inhibitors and others. Furthermore, the potential of radiopharmaceuticals for diagnosis of multidrug-resistant tumors and of nanotechnology to combat drug-resistant tumors is also discussed.

It is increasingly recognized that various transporter proteins are expressed throughout the body and determine absorption, tissue distribution, biliary and renal elimination of endogenous compounds and drugs and drug effects. This book will give an overview on the transporter families which are most important for drug therapy. Most chapters will focus on one transporter family highlighting tissue expression, substrates, inhibitors, knock-out mouse models and clinical studies.

This book provides new structural, biochemical, and clinical information on ABC transporters. The authors explore and describe the state of the art of research, knowledge, and prospects for the future for this important family of proteins. The first ABC transporter was discovered in 1973 and was named P-glycoprotein. It elicits resistance to cytotoxic drugs, chiefly in human tumours, within which chemotherapy failure is observed in about 50% of cases. Together with its complex pharmacology, and even a suspected role in Alzheimer’s disease, this ABC transporter still eludes a clinical solution to its multidrug resistance property. ABC transporters are integral membrane active proteins and they belong to one of the largest protein families across all species. Their myriad roles encompass the import or export of a diverse range of allocrites, including ion, nutrients, peptides, polysaccharides, lipids, and xenobiotics. They are of major medical importance with many members elaborating multidrug resistance in bacteria, fungi, yeast, parasites, and humans. Other ABC transporters are involved in a number of inherited diseases, including cystic fibrosis, macular degeneration, gout, and several other metabolic disorders

Organisms are said to be drug-resistant when drugs meant to neutralise them have reduced effect. When an organism is resistant to more than one drug, it is said to be multi-drug resistant. The most prominent example of this is antibiotic resistance. Drug resistance is also found in some tumour cells, which makes it more difficult to use chemotherapy to attack tumours made of those cells. When a drug such as an antibiotic is administered, those which have a genetic resistance to the drug will survive and reproduce, and the new population will be drug-resistant. This book provides in depth research on multi-drug resistance and its impact on neuorology. This includes studies on GS-X Pump/Multidrug Resistance Proteins, Quantitation of O6 -- Methylguanine, Therapeutic Responses to Chemotherapy, Profiles in Cancer, Neurodegenerative Diseases and Multiple Sclerosis.

This book is devoted to the fascinating superfamily of plant ATP-binding cassette (ABC) transporters and their variety of transported substrates. It highlights their exciting biological functions, covering aspects ranging from cellular detoxification, through development, to symbiosis and defense. Moreover, it also includes a number of chapters that center on ABC transporters from non-Arabidopsis species. ABC proteins are ubiquitous, membrane-intrinsic transporters that catalyze the primary (ATP-dependent) movement of their substrates through biological membranes. Initially identified as an essential aspect of a vacuolar detoxification process, genetic work in the last decade has revealed an unexpectedly diverse variety of ABC transporter substrates, which include not only xenobiotic conjugates, but also heavy metals, lipids, terpenoids, lignols, alkaloids and organic acids. The discovery that members of the ABCB and ABCG family are involved in the movement of phytohormones has further sparked their exploration and provided a new understanding of the whole family. Accordingly, the trafficking, regulation and structure-function of ABCB-type auxin transporters are especially emphasized in this book.

This book provides with a comprehensive overview of the role of drug transporters in drug disposition and efficacy/toxicity, as well as drug-drug interactions and recent advances in the field. Transporters are known determinants of drug disposition and efficacy/toxicity. In general, they are divided into solute carrier (SLC) and ATP binding cassette (ABC) families, and are located along cell membranes, where they mediate drug uptake into cells and export out of cells. Drug transporters are essential in maintaining cell homeostasis, and their gene mutations may cause or contribute to severe human genetic disorders, such as cystic fibrosis, neurological disease, retinal degeneration, anemia, and cholesterol and bile transport defects. Conversely, some diseases may also alter transporter functions and expressions, in turn aggravating disease process. Further, since over-expression of some ABC transporters is a potential contributor to multidrug-resistance (MDR), the book presents a number of strategies to overcome MDR, including ABC transporter inhibitors and applying epigenetic methods to modulate transporter expressions and functions. This book is useful for graduate students and professionals who are looking to refresh or expand their knowledge of this exciting field.