Advances in genetics, molecular biology and gene delivery technologies in recent years have led to new gene therapy strategies for treatment of a variety of diseases. This book gives a comprehensive overview of the present status and future directions of gene delivery systems and therapeutic strategies for the clinical application of gene therapy in cancer, cardiovascular and central nervous system diseases. Stem cell-based therapies and gene expression regulatory systems as novel platform technologies for various gene therapy applications are also discussed. Leading experts give excellent overviews of basic molecular aspects and clinical applications in this new emerging biomedical field.

Recent developments in stem cell biology have opened new directions in cell therapy. This book provides the state-of-the-art developments in using biomaterials as artificial niches for engineering stem cells, both for the purpose of better understanding their biology under 3D biomimetic conditions as well as for developing new strategies for efficient long term maintenance and directed differentiation of stem cells into various therapeutic lineages. Animal and human stem cells of both embryonic and adult origin are discussed with applications ranging from nerve regeneration, orthopedics, cardiovascular therapy, blood cell generation and cancer therapy. Both synthetic and natural biomaterials are reviewed with emphasis on how material-stem cell interactions direct specific signaling pathways and ultimately modulate the cell fate. This book is valuable for biomaterial scientists, tissue engineers, clinicians as well as stem cell biologists involved in basic research and applications of adult and embryonic stem cells.

Genetic testing has become commonplace, and clinicians are frequently able to use knowledge of an individual's specific genetic differences to guide their course of action. Molecular Genetics and Personalized Medicine highlights developments that have been made in the field of molecular genetics and how they have been applied clinically. It will serve as a useful reference for physicians hoping to better understand the role of molecular medicine in clinical practice. In addition, it should also prove to be an invaluable resource for the basic scientist that wants to better understand how advances in the laboratory are being moved from the bench to the bedside. All chapters are written by experts in their fields and include the most up to date medical information. The authors simplify complex genetic concepts and focus on practical patient related issues. The book will be of great value to pathologists, hematologists/oncologists, clinical geneticists, high-risk obstetricians, general practitioners, and physicians in all other medical specialties who utilize genetic testing to direct therapy.

It is now widely accepted that cells have the ability to initiate a program of gene-directed death, a process called "apoptosis" which may also be used as an innovative strategy for therapeutic intervention in cancer therapy. Experts in this area report on the regulation and control of apoptosis in hormone dependent (neoplastic) tissue and the possibility to exploit active cell death for therapeutic application.

Transposon tagging can work. Even though most of our understand ing about the factors that contribute to a successful tagging experiment has been accumulated from a limited number of experiments using different transposable elements in different genetic backgrounds, it is still possible to draw some conclusions regarding the best experimental strategies for gene tagging. In our experience, Spm has proved to be a good element for transposon tagging. The frequency of recovering mutable alleles in duced by Spm is not significantly different from that for Ac-Ds or for Mu 6 (summarized in Ref. 22) and varies from about 10- to 10=zr: -8pm has the unique advantage, however, in that all of the members of thiSfumily that have been examined thus far are homologous to each other at the DNA level. Therefore, by combining molecular analysis with genetic segre gation, it is possible to identify and isolate alleles that are due to insertions of either autonomous or nonautonomous Spm elements. There are definite steps one can take to increase the chances of de tecting a transposition into the gene of interest. The most important step is to select a genetic background in which the desired phenotype will be easy to screen. If the phenotype is not likely to be mutable, then tester lines should be constructed so as to contain flanking markers that can aid in subsequent segregation analyses."

In numerous conversations with our colleagues from India, it was suggested that we help to institute a series of symposia in India similar in nature to those that have been conducted by our Latin American colleagues for more than 10 years. We were fortunate to have with us in Oak Ridge Dr. Niyogi and Dr. Mitra from Indian universities. Their close ties with the Bose Institute in Calcutta and the resultant correspondence with the Institute Director, Dr. S. M. Sircar, provided the stimulus for organization of this first Indian symposium, which was held in Calcutta. Under the direction of Dr. Sircar, Dr. B. B. Biswas did an outstandingjob of organizing this conference. Financial support was arranged through Dr. R. R. Ronkin of the United States National Science Foundation, who smoothed the way for the use of PL 480 funds which were approved by the Indian Government for the organization and running of this most valuable symposium. The many Indian scientists who contributed papers and enthusiastically and vigorously entered into the discussions demonstrated the strength of modern science in India. The topic, Control of Transcription, is a timely one, and considerable activity in this area is going on all over the world. The success of this symposium speaks well for the future of these Indian conferences and workshops being planned for the next few years. Again, the worldwide "community of science" is clearly manifested by the close cooperation we have observed in this fruitful and successful symposium.

Many modern geneticists attempt to elucidate the molecular basis of phenotype by utilizing a battery of techniques derived from physical chemistry on subcellular components isolated from various species of organisms. Volume 5 of the Handbook of Genetics provides explanations of the advantages and shortcomings of some of these revolutionary tech niques, and the nonspecialist is alerted to key research papers, reviews, and reference works. Much of the text deals with the structure and func tioning of the molecules bearing genetic information which reside in the nucleus and with the processing of this information by the ribosomes resid ing in the cytoplasm of eukaryotic cells. The mitochondria, which also live in the cytoplasm of the cells of all eukaryotes, now appear to be separate little creatures. These, as Lynn Margulis pointed out in Volume 1, are the colonial posterity of migrant prokaryotes, probably primitive bacteria that swam into the ancestral precursors of all eukaryotic cells and remained as symbionts. They have maintained themselves and their ways ever since, replicating their own DNA and transcribing an RNA quite different from that of their hosts. In a similar manner, the chloroplasts in all plants are self-replicating organelles presumably derived from the blue-green algae, with their own nucleic acids and ribosomes. Four chapters are devoted to the nucleic acids and the ribosomal components of both classes of these semi-independent lodgers. Finally, data from various sources on genetic variants of enzymes are tabulated for ready reference, and an evaluation of this information is attempted."

In recent years, epigenetic approaches to existing scientific problems have offered many new and exciting perspectives. This book focuses on epigenetic approaches to study asthma and allergy research. The authors briefly review cellular factors, immune signaling, and inflammatory pathways in allergy and asthma, as well as genetic influences in the pathogenesis of atopic disorders. Diseases that have been clearly linked to an epigenetic dysregulation will be discussed, as well as the role of epigenetics in the origin of complex diseases. The authors will examine the impact of environment factors in the predisposition to atopic disorders, and they will also describe the major unanswered questions and future perspectives of an exciting new field that studies allergic diseases from the epigenetic point of view.

Alternative Sources of Adult Stem Cells: Human Amniotic Membrane, by S. Wolbank, M. van Griensven, R. Grillari-Voglauer, and A. Peterbauer-Scherb;
*
Mesenchymal Stromal Cells Derived from Human Umbilical Cord Tissues: Primitive Cells with Potential for Clinical and Tissue Engineering Applications, by P. Moretti, T. Hatlapatka, D. Marten, A. Lavrentieva, I. Majore, R. Hass and C. Kasper;
*
Isolation, Characterization, Differentiation, and Application of Adipose-Derived Stem Cells, by J. W. Kuhbier, B. Weyand, C. Radtke, P. M. Vogt, C. Kasper and K. Reimers;
*
Induced Pluripotent Stem Cells: Characteristics and Perspectives, by T. Cantz and U. Martin;
*
Induced Pluripotent Stem Cell Technology in Regenerative Medicine and Biology, by D. Pei, J. Xu, Q. Zhuang, H.-F. Tse and M. A. Esteban;
*
Production Process for Stem Cell Based Therapeutic Implants: Expansion of the Production Cell Line and Cultivation of Encapsulated Cells, by C. Weber, S. Pohl, R. Poertner, P. Pino-Grace, D. Freimark, C. Wallrapp, P. Geigle and P. Czermak;
*
Cartilage Engineering from Mesenchymal Stem Cells, by C. Goepfert, A. Slobodianski, A.F. Schilling, P. Adamietz and R. Poertner;
*
Outgrowth Endothelial Cells: Sources, Characteristics and Potential Applications in Tissue Engineering and Regenerative Medicine, by S. Fuchs, E. Dohle, M. Kolbe, C. J. Kirkpatrick;
*
Basic Science and Clinical Application of Stem Cells in Veterinary Medicine, by I. Ribitsch, J. Burk, U. Delling, C. Geissler, C. Gittel, H. Julke, W. Brehm;
*
Bone Marrow Stem Cells in ClinicalApplication: Harnessing Paracrine Roles and Niche Mechanisms, by R. M. El Backly, R. Cancedda;
*
Clinical Application of Stem Cellsin the Cardiovascular System, C. Stamm, K. Klose, Y.-H. Choi"

Medical research involving human subjects has contributed to considerable advancements in our knowledge, and to medical benefits. At the same time the development of new technologies as well as further globalisation of medical research raises questions that require the attention of researchers from a range of disciplines. This book gathers the contributions of researchers from nine different countries, who analyse recent developments in medical research from ethical, historical, legal and socio-cultural perspectives. In addition to reflections on innovations in science such as genetic databases and the concept of "targeted therapy" the book also includes analyses regarding the ethico-legal regulation of new technologies such as human tissue banking or the handling of genetic information potentially relevant for participants in medical research. Country and culture-specific aspects that are relevant to human medical research from a global perspective also play a part. The value of multi- and interdisciplinary analysis that includes the perspectives of scholars from normative and empirical disciplines is a shared premise of each contribution.

Recent progress in high-throughput technologies and genome wide transcriptome studies have lead to a significant scientific milestone of discovering non-coding RNAs (ncRNAs) which spans through a major portion of the genome. These RNAs most often act as riboregulators, and actively participate in the regulation of important cellular functions at the transcriptional and/or post-transcriptional levels rather than simply being an intermediated messenger between DNA and proteins. As the appreciation for the importance of ncRNAs continues to emerge, it is also increasingly clear that these play critical roles in gene regulatory processes during development and differentiation. Further, regulatory RNAs are useful biomarkers for diagnosis of diseases. Hence these RNA regulators are essential to the development of therapeutics. This book on "Regulatory RNAs" offers a comprehensive view on our current understanding of these regulatory RNAs viz. siRNA, miRNA, piRNA, snoRNA, long non-coding RNA, small RNA etc. It addresses both the biogenesis and mechanism of action of regulatory RNAs with a primary focus on their annotation, experimental methodologies (microarray, next-gen sequencing etc.) for their discovery, computational tools for their prediction, and above all, applications of these revolutionary regulatory molecules in understanding biological systems and diseases, including therapeutics. This comprehensive volume is intended for readers with research or teaching interests in ncRNA biology and will provide a major information resource on current research in the fast-moving fields of RNA and gene expression regulation. Cutting-edge and concise, "Regulatory RNAs: Basics, Methods and Applications" promises to support vital research in the field of regulatory RNAs, ever-continuing to grow rapidly and gain increasing importance in basic and translational biology.

Gene therapy for inflammatory diseases is a new , burgeoning field of medicine. Edited by the undisputed pioneers of this area of research, this volume is the first devoted to its topic. It contains thirteen chapters, each written by leaders in their respective fields, that summarize the state of the art in developing novel, gene based treatments for inflammatory diseases. As well as providing an introduction to the basic concepts of gene therapy and the use of naked DNA approaches, the book describes the advances that have been made in applying them to arthritis, lupus, multiple sclerosis, diabetes, Sjogren`s syndrome and transplantation.One chapter is devoted to discussing the first human clinical trials that apply gene therapy to the treatment of an inflammatory disease. As well as providing novel therapeutic approaches, gene therapy facilitates the development of new and improved animal models of disease; a chapter describing these advances is also included. As an up-to-date, timely book written by th

What, precisely, is a primitive fish? Most biologists would agree that the living cyclostomes, selachians, crossopterygians, etc. cannot be considered truly primitive. However, they and the fossil record have served to provide the information which forms the basis for speculation concerning the nature of the original vertebrates. This symposium of biologists from a variety of disciplines was called together to create collectively, from the best available current evidence, a picture of the probable line of evolution of the prototype primitive fishes. The symposium was designed to follow one that took place in Stockholm in 1967, convened for a similar purpose, with about the same number of participants. It is a matter of interest that almost the entire 1967 symposium (Nobel Symposium 4) dealt only with the hard tissues, whether fossil or modern. In charting the course of the present symposium it was felt that the intervening years have produced numerous lines of new evidence that could be employed in the same way that a navigator determines his position. Each field, be it adult morphology, geology, ecology, biochemistry, development or physiology, generates evidence that can be extrapolated backward from existing vertebrate forms and forward from invertebrate forms. If the intersect of only two lines of evidence produces a navigational "fix" of rather low reliability, then an intersect, however unfocussed, of multiple guidelines from more numerous disciplines might provide a better position from which to judge early vertebrate history.

The newest installment in this superb series presents descriptions of the latest DNA recombinants molecule technology. The text combines reports on basic research in genetics with discussions of specific new industrial applications (as well as refinements of older ones) that are likely to prove highly profitable in the years to come.

From July 28 to August 3, 1991, an International Meeting on the REGULATION OF CHLOROPLAST BIOGENESIS was held at the capsis Beach Hotel in Aghia Pelaghia, on the island of crete, Greece. The Meeting (Advanced Research Workshop-Lecture Course) was co-sponsored by NATO, FEBS and IUB, and was held under the auspices of the International society for Chloro plast Development, the Greek Ministry of Industry, Research and Technol ogy, and the National Center for Scientific Research "Demokritos". The Meeting focused on recent advances in the field of chloroplast biogenesis and the regulatory mechanisms underlined, and brought together over 120 experts and students of the field from 22 countries. The subject of chloroplast biogenesis has experienced great progress in recent years mainly thanks to the application of Molecular Biology techniques and methodology. New findings that emerge gradually unravel the regulatory mechanisms involved in the assembly, stabilization and growth of the photosynthetic units in thylakoids, the signal transduction chain leading from photoreception to gene expression, the transport of nuclear-coded proteins into stroma-soluble supramolecular enzyme complexes as well as thylakoid-bound supramolecular complexes, involved in light-energy transduction. It was the aim of this meeting to bring together experts and students coming from diverse disciplines (ranging from Botany and plant physiology to Molecular Biology, Biophysics and Biotechnology), to discuss the recent advances in the field so that thorough exchange of ideas and working hypotheses would be achieved.

Historical Introduction The Marfan Syndrome: From Clinical Delineation to Mutational Characterization, a Semiautobiographic Account VictorA. McKusick l n 1876, E. Williams, an ophthalmologistin Cincinnati, Ohio, described ectopia lentis in a brother and sister who were exceptionally tall and had been loosejointed from birth. I Although there is a Williams syndrome that has aortic manifestations (supravalvar aortic stenosis), the name Williams was never associated with the disorder we now call Marfan syndrome. The reason is clear: Williamswas geographically removed from the leading medical centers and published in the Transactions of the American Ophthalmological Society; surely his report attracted little attention and the non-ocular features were not emphasized. 2 The case report that brought the disorder to attention was provided by a prominent Pari- sian professor of pediatrics, Antoine Bernard-Jean Marfan (1858-1942), who did much to establish pediatrics as a specialty in France and elsewhere. He was the author of widely read textbooks and monographson pediatrictopics and waseditor of Le Nourrisson for a great many years. In addition to the syndromeunder discussion here, his name is often attached to "Marfan's law" (that immunity to pulmonary phthisis is conferred by the healing of a local tuberculous 3 lesion) and Marfan's subxiphoid approach for aspiratingfluid from the pericardial sac. (Please pardon my use of the possessive form of the eponym in these two instances!) Pictures of Marfan (Fig.

The 19th annual meeting of the European Environmental Mutagen Society was held in Rhodes, Greece, from October 21st to 26th, 1989. The programme was chosen to explore what is currently known about the mechanisms of mutagenesis and carcinogenesis, induced by environmental agents, and the questions regarding the relationship of these two processes. Recent findings, techniques and methodologies in the area of biomonitoring of humans exposed to environmental mutagens-carcinogens were presented and considerable attention was also paid to the aspects and issues of collaborative environmental policy. Researchers from allover the world contributed to the programme of the meeting with posters and oral presentations, providing a variety of new data and interesting scientific approaches. A number of outstanding scientists were invited to present the results of their work. It is only their presenta tions which are included in this book, covering the following topics: Mutations and carcinogenesis; mechanisms of chemical ly-induced genetic effects on molecular, chromosomal and cell division level; adaptability and repair mechanisms; chemical carcinogenesis and oncogenes; structure and metabolism of mutagens-carcinogens; biomonitoring and epidemiology of humans exposed to environmental mutagens-carcinogens. For the sake of evaluating and controlling the mutagenic and carcinogenic potential of our environment it is indispens able to understand the mechanisms and processes by which chemicals act on the genetic material, causing either heredi tary disease or cancer. The pUblication of these proceedings will hopefully contribute to this task."

Teratology is at once among the oldest and youngest of human preoccupations. Coincident with man's first observations of the stars were his recordings of human and animal deformities. But, such aberrancies must have occurred even earlier, for although it is one of those things-like evolution-that cannot be proven, it is nevertheless indisputable that dysmorphogenesis must have occurred from the time complex forms of life first arose on our planet; and that from the beginnings of human awareness our species was conscious of such happenings. From the earliest recordings of this fascination with the form and meaning of abnormality a tortuous but continuous line extends to modern struggles to understand and control these manifestations. And now, after long occupying an honorable but peripheral place in the halls of philosophical and scientific pursuits, teratology has quite suddenly come to take a prominent position at the hub of a complex crossroads of human concerns. This shift in its fortune has taken several forms. Fetal maldevelopment has become the concern of environmentalists, activists of various persuasions, indus trial organizations, government agencies, ethicists, parents-i. e., individuals and groups whose actions are impelled by apprehension. Such motives are of course not without basis; the trauma of thalidomide left a scar yet raw. For still others clinicians, academics, experimentalists-the upsurge in the interest in fetal mal development is at a different level, and their pursuits are broad, taking external agents as but one of the causes of defective development."

The 4th International Conference on Hemochromatosis and the 11th International Conference on Iron and Iron Proteins took place in Jerusalem on April 27 -30 and on May 2 -7 1993, respectively. The first, a clinical meeting, and the second, a forum designed primarily for basic scientists. Both meetings are held regularly on alter nate years and represent probably the most important forum for the exchange of information in iron research. The present volume "Progress in Iron Research" is based on a selection of presentations delivered at these meetings. However, this volume represents much more than a publication of conference proceedings. It offers a comprehensive state-of-the-art review on most aspects of iron metabolism. We have tried to offer a balanced review of the most important recent developments in iron research including both basic research and clinical investigation. However, the scope of chapters was based, by definition, on the actual participants at the meetings and some important fields in iron research such as plant physiology, microbial aspects of iron metabolism, and free radical research have not been dealt with. Many of the authors of the 40 chapters have beel). pt1rsonally responsible for some of the most important developments in iron research ~~vidffig: n~~~ights into iron physiology and pathophysiology. The Editors wish to express their gratitude for the outstanding and timely cooperation of all contributors to this volume.

2. The Translational Machinery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Translation Initiation in Prokaryotes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Translation Initiation in Eukaryotes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 14 Translation Elongation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Translation Termination in Prokaryotes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Translation Termination in Eukaryotes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Error Correction in Translation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 A Structural Basis of Error Correction in Translation . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Ribosome Editing: A Failsafe Error Correction Mechanism . . . . . . . . . . . . . . . . 22 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3. Errors During Elongation Can Cause Translational 29 Frameshifting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spontaneous Frameshifting Versus Programmed Frameshifting . . . . . . . . . . 30 Spontaneous Frameshifts Can Be Induced at Specific Codons . . . . . . . . . . . . 31 4. Programmed +1 Frameshifting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 The pifE Gene of E. coli . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Using the pifE System to Study General Frameshifting in E. coli . . . . . . . . 46 Ty Retrotransposons in Yeast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Frameshifting in Retrotransposon Ty1 Occurs by tRNA Slippage . . . . . . . 48 Frameshifting in Retrotransposon Ty3 Occurs by Out-of-Frame Binding of tRNA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 The Rat Ornithine Decarboxylase Antizyme Gene . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 5. Programmed -1 Frameshifting in Eukaryotes . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 Programmed -1 Frameshifting in Eukaryotes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 -1 Frameshifting Occurs on a "Slippery Heptamer" . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 The Simultaneous-Slippage Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 of -1 Frameshifting by a Downstream Pseudoknot . . . . . . . . . . 77 Stimulation Does the Pseudoknot Only Block Passage of the Ribosome? . . . . . . . . . .

Molecular biology has rapidly advanced since the discovery of the basic flow of information in life, from DNA to RNA to proteins. While there are several important and interesting exceptions to this general flow of information, the importance of these biological macromolecules in dictating the phenotypic nature of living creatures in health and disease is paramount. In the last one and a half decades, and particularly after the completion of the Human Genome Project, there has been an explosion of technologies that allow the broad characterization of these macromolecules in physiology, and the perturbations to these macromolecules that occur in diseases such as cancer. In this volume, we will explore the modern approaches used to characterize these macromolecules in an unbiased, systematic way. Such technologies are rapidly advancing our knowledge of the coordinated and complicated changes that occur during carcinogenesis, and are providing vital information that, when correctly interpreted by biostatistical/bioinformatics analyses, can be exploited for the prevention, diagnosis, and treatment of human cancers. The purpose of this volume is to provide an overview of modern molecular biological approaches to unbiased discovery in cancer research. Advances in molecular biology allowing unbiased analysis of changes in cancer initiation and progression will be overviewed. These include the strategies employed in modern genomics, gene expression analysis, and proteomics.

Lifestyle, in any part of the world, is associated with the occurrence of major chronic diseases, including coronary heart disease, hypertension, and stroke; many distinct types of cancer; and adult onset diabetes (11,22,70,75). One important element of lifestyle is tobacco use, which appreciably increases the risk of a number of chronic diseases (21). Other lifestyle factors relate to nutritional traditions, alcohol use, and exercise (11,30,58,60,70,71). The underlying evidence is, in part, based on the evidence of specific diseases in relation to dietary habits in a given geographic region, as well as changes in such disease occurrences in migrant populations from a low risk to a high risk area, and vice versa (25,42). Populations that customarily consume fruits and vegetables and also whole grain cereal products generally have a lower risk of cardiovascular diseases and specific types of cancer than populations with a lower intake of such foods, everything else being equal (63). In the last few years, research has provided mechanistic explanations as to the reasons for the protective effects of specific foods. This paper will emphasize the mechanisms whereby cancer risks are reduced by dietary modification.

THIS BOOK collects together papers given at a NATO Advanced Research Workshop held at Il Ciocco (Lucca), Italy, from the 9th to the 15th April, 1989. It sets out to present the current state of understanding of the principles governing the way fluxes and concentrations are maintained and controlled in metabolic systems. Although this is a topic that has held the interest of biochemists for many years, it is only quite recently that the methods of analysing the kinetics of multi-enzyme pathways developed over the past two decades have come to be widely discussed or applied experimentally. Many biochemists remain sceptical that the new methods offer a real advance (except in complexity) over the landmark discoveries of the 1950s and 1960s relating to inhibition of enzymes at branch-points by the end products of metabolic pathways, and the interpretation of allosteric effects and cooperativity. Even those who have become convinced that the classical ideas provide only the starting point for understanding metabolic control have been by no means unanimous in their assess ment of the direction in which one should advance. In this book we have tried to include all of the current points of view, including the view that the classical theories tell us all that we need to know. We have not seen it as our role as editors to paper over the cracks that exist and to pretend that we can speak to the world with one voice."