Biomedical Applications Of Immobilized Enzymes And Proteins

I) ADSORPTION EEEEEEEE E E carrier 2) COVALENT LINKAGE a) Insoluble support b) Intermolecular linkage N'E~ ~~ c) Soluble support 0 \:)....m 3) tM TRIX (MOLECULAR) ENTRAPMENT ~~~~~;;..,J~-polymer matrix 4) ENCAPSULATION membrane FIGURE I. Classification of immobilized enzymes. Covalently linked, adsorbed, and matrix-entrapped enzymes represent stage II, research on the microenvironment. Microencapsulation represents stage III, research on the intracellular environment. Further subdivision of microencapsulated enzymes will be found in Chapter 12. 4 T. M. S. CHANG matrix entrapment. In this section, detailed discussions will center on clinical analysis, urine analysis, monitoring of environmental pollution, radioimmune assay, enzyme-linked immunosorbent assay, enzyme electrodes, and other approaches involving immobilized enzymes, antibodies, and antigens. In the final section, research workers describe and discuss the perspectives of immobilized enzymes and proteins. Here, they speculate on the future potential of possible approaches, even though these may not have been extensively studied or tested at the laboratory stage. The biomedical applications of enzymes and proteins, especially in the thera peutic area, is in a very early stage of development. Much remains to be explored and studied, and the area is wide open for investigators interested in original research in a new interdisciplinary area. References Chang, T. M. S., 1972, Artificial Cells, Charles C. Thomas, Publisher, Springfield, Ill. Dunlop, R. B. (ed.), 1974, Immobilized Biochemicals and Affinity ChrOTIULtography, Plenum Press, N ew York.

Carbohydrate Chemistry provides review coverage of all publications relevant to the chemistry of monosaccharides and oligosaccharides in a given year. The amount of research in this field appearing in the organic chemical literature is increasing because of the enhanced importance of the subject, especially in areas of medicinal chemistry and biology. In no part of the field is this more apparent than in the synthesis of oligosaccharides required by scientists working in glycobiology. Clycomedicinal chemistry and its reliance on carbohydrate synthesis is now very well established, for example, by the preparation of specific carbohydrate- based antigens, especially cancer-specific oligosaccharides and glycoconjugates. Coverage of topics such as nucleosides, amino-sugars, alditols and cyclitols also covers much research of relevance to biological and medicinal chemistry. Each volume of the series brings together references to all published work in given areas of the subject and serves as a comprehensive database for the active research chemist Specialist Periodical Reports provide systematic and detailed review coverage in major areas of chemical research. Compiled by teams of leading authorities in the relevant subject areas, the series creates a unique service for the active research chemist, with regular, in-depth accounts of progress in particular fields of chemistry. Subject coverage within different volumes of a given title is similar and publication is on an annual or biennial basis.

In the twenty years since Bangham first described the model membrane system which he named "liposomes", a generation of scientists have explored the properties of lipid-based microstructures. Liposomes of all sizes, tubular and helical structures, and self-assembled lipid films have been prepared and studied in detail. Many of the advances· in the basic research have led to significant technological applications. Lipid microstructure research has begun to mature and it is an appropriate time for an in-depth look at the biotechnological applications, both achieved and potential. As a forum for active discussions within this growipg field, two Workshops were organized: "Technological Applications of Phospholipid Bilayers, Vesicles and Thin Films", held in Puerto de la Cruz, Tenerife, Canary Islands; and "Biotechnological Applications of Membrane Studies", held in Donostia-San Sabastian, Basque Country, Spain. The organizers of these Workshops believe that development of lipid self-assembly into a technological discipline requires significant interaction across traditional scientific boundaries. Thus the Workshops gathered an eclectic group of colleagues whose interests ranged from basic research into structure, interactions and stabilization of biomembranes to applications of lipid microstructures such as artificial cells, diagnostic reagents, energy transfer systems, and biosensors.

This is the first book that provides a comprehensive review of the entire area of artificial cells. The author, a pioneer of the field, invented the first artificial cells some 50 years ago and has continued to carry out active research in this field. Since then, there have been explosive research activities around the world on artificial cells, especially in fields related to biotechnology, nanomedicine, cell therapy, blood substitutes, drug delivery and others. However, instead of the term ?artificial cells,? many authors use other terminologies such as blood substitutes, bioencapsulation, liposomes, nanoparticles and so on. Furthermore, papers in this highly interdisciplinary area are published in numerous journals specializing in chemistry, medicine, surgery, bioengineering and others, while books in this area are mostly multi-authored, describing very specific and narrow areas. As a result, any meaningful literature search for a complete idea of the present status of the whole field of artificial cells is impossible.This monograph is written to fill this gap by including all those areas in artificial cells that are disguised under different terminologies. Each chapter begins with a detailed overview, followed by detailed examples of the author's own research and a full description of his methods and procedures. Readers interested in a detailed overview of the whole area can read from cover to cover, omitting the methods section at the end of each chapter; while those entering this area of research will find the detailed methods and procedures very useful.

Published in 1984: For this volume the publishers at CRC Press have chosen to present information on just one important area, namely the biomedical field, where much progress in the application of microencapsulation has been made in recent years.