T. T. Ngo and H. M. Lenhoff Department of Developmental and Cell Biology University of California, Irvine, CA 92717 In 1959, Yalow and Berson used insulin labeled with radioactive iodine to develop a quantitative immunological method for determining the amount of insulin in human plasma. Their method depends upon ~ competition between insulin labeled with radioactive iodine (II 1) and unlabeled insulin from plasma for a fixed and limited number of specific binding sites on the antibody to insulin. The amount of the labeled insulin bound to the antibody is inversely proportional to the amount of insulin in the plasma sample. Their method, which is so elegantly simple in concept, is made possible by the ability to detect with ease extremely low levels of radioactivity, and by the exquisite specificity of an antibody capable of specifically binding the analyte. Such a combination of sensitivity and specificity is the basis of this versatile analytical tool called radioimmunoassay (RIA). Twelve years later, Engvall and Perlmann (1971) and Van Weemen and Schuurs (1971) independently introduced the use of enzymes as another category of sensitive and even more versatile labels for use in immunoassays. Engvall and Perlmann (l971) coined the term ELISA, which stands for Enzyme Linked Immunosorbent Assay.

This unique reference provides a pragmatic approach to the development of successful commercial immunodiagnostic products based on enzyme immunoessay technology. Presenting both the basic and applied principles, Enzyme Immunoassays gathers information on all aspects of this process, from the initial conceptualization to the introduction of the product to the market.

Immunoassays are among the most powerful and sensitive technologies now available for patient diagnosis and monitoring. This book is an indispensable guide to information on the theory and practice of immunoassays. It discusses the scientific basis of these technologies in a logical, organized, and heuristic manner and provides protocols for specific assays. The contents of this unique book are balanced among theory, practical issues, quality control, automation, and subspecialty areas, making it ideal for health science students, laboratory scientists, and clinicians. - Presents up-to-date information - Provides extensive cross-referencing - Covers theory and practice in full detail - Written by leading authorities

This unique reference provides a pragmatic approach to the development of successful commercial immunodiagnostic products based on enzyme immunoessay technology. Presenting both the basic and applied principles, Enzyme Immunoassays gathers information on all aspects of this process, from the initial conceptualization to the introduction of the product to the market.

The purpose of this book is to focus attention on some of these ideas and concepts. In doing so, it has captured a glimpse of the past and it attempts a projection of the future, but mostly it reveals an overview of the field as it exists as the present time. It aims to serve to spawn further growth in ideas and encourage applications to increasingly broader segments of both clinical and general analytical chemistry fields.

Handbook of Immunoassay Technologies: Approaches, Performances, and Applications unravels the role of immunoassays in the biochemical sciences. During the last four decades, a wide range of immunoassays has been developed, ranging from the conventional enzyme-linked immunosorbent assays, to the smartphone-based point-of-care formats. The advances in rapid biochemical procedures, novel biosensing schemes, fully integrated lab-on-a-chip platforms, prolonged biomolecular storage strategies, device miniaturization and interfacing, and emerging smart system technologies equipped with personalized mobile healthcare tools are paving the way to next-generation immunoassays, and are all discussed in this comprehensive text. Immunoassays play a prominent role in clinical diagnostics as they are the eyes of healthcare professionals, helping them make informed clinical decisions via confirmed disease diagnosis, and thus enabling favorable health outcomes. The faster and reliable diagnosis of infections will further control their spread to uninfected persons. Similarly, immunoassays play a prominent role in veterinary diagnostics, food analysis, environmental monitoring, defense and security, and other bioanalytical settings. Therefore, they enable the detection of a plethora of analytes, which includes disease biomarkers, pathogens, drug impurities, environmental contaminants, allergens, food adulterants, drugs of abuse and various biomolecules. - Provides a valuable increase of understanding of cellular and biomedical functions - Gives the most updated resource in the field of immunoassays, providing the comprehensive details of various types of immunoassays that need to be performed in healthcare, and in industrial, environmental and other biochemical settings - Discusses all multifarious aspects of immunoassays - Describes the immunoassay formats, along with their principle of operation, characteristics, pros and cons, and potential biochemical and bioanalytical applications - Provides extensive knowledge and guided insights as detailed by experienced, renowned experts and key opinion makers in the field of immunoassays

The basis of all immunoassays is the interaction of antibodies with antigens. The most widely used immunoassay technique is radioimmunoassay (RIA) which was first developed by Yalow and Berson in 1959. The principle of RIA is elegantly simple. It utilizes a competitve binding reaction between analytes and a radio-labeled analog of the analytes (the tracer) for anti-analyte antibodies. In addition to its exquisite specificity, extraordinary sensitivity, good accuracy and precision, ease and rapidity of assay and simplicity of assay development, the applicability of RIA to a wide variety of substances has made it one of the most powerful and versatile analytical methods of the 20th century and beyond. Millions of RIA's are being performed annually on clinical, biological and environmental samples in licensed laboratories. In order to expand the use of RIA beyond the confines of these laboratories to areas like physician's offices, patients' homes, economically less developed countries, agricultural fields, large scale and continuing screening tests for infectious diseases, it has become necessary to develop non-isotopic labels. Indeed the last fifteen years have seen the development of a great number of ingenious non-isotopic labels in immunoassay so that a whole new industry capitalizing on the potential market for non isotopic immunoassays has appeared. It is the purpose of this volume to present in depth, state-of-the-art reviews on techniques used in non-isotopic immunoassays. Topics covered include: (1) Enzyme-labeled immunoassay; (2) Luminescene immunoassay; (3) Immunoassay at liquid-solid interface; (4) Membrane immunoassay and (5) "Particle"-mediated immunoassay.