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Books > Medicine > Other branches of medicine > Pathology > Medical microbiology & virology

Cancer Biology and the Nuclear Envelope - Recent Advances May Elucidate Past Paradoxes (Hardcover, 2014 ed.): Eric C. Schirmer,... Cancer Biology and the Nuclear Envelope - Recent Advances May Elucidate Past Paradoxes (Hardcover, 2014 ed.)
Eric C. Schirmer, Jose I. de las Heras
R5,277 Discovery Miles 52 770 Ships in 18 - 22 working days

"Nuclear envelope (NE) defects have been linked to cancer biology since the mid-1800s, but it was not until the last few years that we have begun to understand these historical links and to realize that there are myriad ways that the NE impacts on tumorigenesis. The NE is a complex double membrane system that encloses the genome while providing structural support through the intermediate filament lamin polymer and regulating protein/ mRNA trafficking and signaling between the nucleus and cytoplasm via the nuclear pore complexes (NPCs). These functions already provide some mechanisms for NE influences on cancer biology but work in the past few years has elucidated many others. Lamins and many recently identified NE transmembrane proteins (NETs) have been now shown to function in DNA repair, regulation of cell cycle and signaling, apoptosis, cell migration in metastasis and nuclear architecture and morphology. This volume presents a comprehensive overview of the wide range of functions recently identified for NE proteins and their relevance in cancer biology, providing molecular mechanisms and evidence of their value as prognostic and diagnostic markers and suggesting new avenues for the treatment of cancer. Indeed some of these recent links are already yielding promising therapies, such as the current clinical trial of selective inhibitors of the nuclear export factor exportin in certain types of leukemia, melanoma and kidney cancer."

Antibiofilm Agents - From Diagnosis to Treatment and Prevention (Hardcover, 2014): Kendra P. Rumbaugh, Iqbal Ahmad Antibiofilm Agents - From Diagnosis to Treatment and Prevention (Hardcover, 2014)
Kendra P. Rumbaugh, Iqbal Ahmad
R5,694 R4,916 Discovery Miles 49 160 Save R778 (14%) Ships in 10 - 15 working days

This book provides a survey of recent advances in the development of antibiofilm agents for clinical and environmental applications. The fact that microbes exist in structured communities called biofilms has slowly become accepted within the medical community. We now know that over 80% of all infectious diseases are biofilm-related; however, significant challenges still lie in our ability to diagnose and treat these extremely recalcitrant infections.

Written by experts from around the globe, this book offers a valuable resource for medical professionals seeking to treat biofilm-related disease, academic and industry researchers interested in drug discovery and instructors who teach courses on microbial pathogenesis and medical microbiology.

Antiviral Methods and Protocols (Hardcover, 2000 ed.): Derek Kinchington, Raymond F. Schinazi Antiviral Methods and Protocols (Hardcover, 2000 ed.)
Derek Kinchington, Raymond F. Schinazi
R2,729 Discovery Miles 27 290 Ships in 18 - 22 working days

This latest addition to the Methods in Molecular Medicine series, Anti- ral Methods and Protocols, is opportune because there is an increasing int- est in discovering compounds that are effective against both chronic and acute viral infections. A number of the methods described in the volume are unp- lished and their inclusion indicates the speed at which this field is moving. This volume is not a review but each chapter contains methods validated by the experts who have spent time in developing the protocols. The hallmark of this series is the comprehensive way in which the me- ods are described, which includes a list of all the reagents needed for each protocol. Of importance is the section on tips and pitfalls that the authors have discovered while developing their protocols. The manual itself is designed to be used by researchers in universities and industry who are familiar with a range of biological techniques but who want to set up quickly a novel assay system. We encourage a dialog between readers and authors, which may also result in useful collaborations.

Recombinant DNA Research and Viruses - Cloning and Expression of Viral Genes (Hardcover, 1985 ed.): Yechiel Becker Recombinant DNA Research and Viruses - Cloning and Expression of Viral Genes (Hardcover, 1985 ed.)
Yechiel Becker
R5,349 Discovery Miles 53 490 Ships in 18 - 22 working days

The development of recombinant DNA technology has made a marked impact on molecular virology. The cleavage of viral DNA genomes with restriction enzymes and the cloning of such DNA fragments in bacterial p1asmids has led to the amplification of selected viral DNA fragments for sequencing and gene expression. RNA virus genomes which can be transcribed to their cDNA form were also cloned in bacterial p1asmids, facilitating the study of RNA virus genes. With the elucidation in recent years of the promoter sequence of various viral genes and the expression of these genes in bacteria or yeast, the understanding of many viral gene functions has made great progress. Cloning and expression of viral genes in mammalian cells was made possible by the construction of shuttle plasmid vectors which carry the origins of DNA replication from bacteria and/or mammalian viruses. The expression of viral genes in bacteria, yeast and eukaryotic cells gives reason to hope that it will be possible to produce viral antigens in large quantities for use as human or animal vaccines. The present volume attempts to capture for the reader some of the high lights of recombinant DNA research in the field of animal and plant viruses."

Applied Virology Research - New Diagnostic Procedures (Hardcover, 1994 ed.): Edouard Kurstak, R.G. Marusyk, F.A. Murphy, M.H.V.... Applied Virology Research - New Diagnostic Procedures (Hardcover, 1994 ed.)
Edouard Kurstak, R.G. Marusyk, F.A. Murphy, M.H.V. Van Regenmortel
R5,978 Discovery Miles 59 780 Ships in 18 - 22 working days

Explains the new methodologies by which viral diseases can be definitively diagnosed in a few hours, especially molecular methods. The many new methods now being developed are based largely on the application of the polymerase chain reaction to the detection of viral genomic material. Accessible to

Plague - One Scientist's Intrepid Search for the Truth about Human Retroviruses and Chronic Fatigue Syndrome (ME/CFS),... Plague - One Scientist's Intrepid Search for the Truth about Human Retroviruses and Chronic Fatigue Syndrome (ME/CFS), Autism, and Other Diseases (Paperback)
Kent Heckenlively, Judy Mikovits
R481 Discovery Miles 4 810 Ships in 18 - 22 working days

#10 on Amazon Charts, USA Today Bestseller "This book is my best attempt to tell the truth about my research, the culture in science today which is hostile to new ideas, and what science can really do if allowed to pursue promising areas of inquiries."-Dr. Judy Mikovits, PhD This is a story for anybody interested in the peril and promise of science at the very highest levels in our country. On July 22, 2009, a special meeting was held with twenty-four leading scientists at the National Institutes of Health to discuss early findings that a newly discovered retrovirus was linked to chronic fatigue syndrome (CFS), prostate cancer, lymphoma, and eventually neurodevelopmental disorders in children. When Dr. Judy Mikovits finished her presentation, the room was silent for a moment, then one of the scientists said, "Oh my God!" The resulting investigation would be like no other in science. For Dr. Mikovits, a twenty-year veteran of the National Cancer Institute, this was the midpoint of a five-year journey that would start with the founding of the Whittemore-Peterson Institute for Neuro-Immune Disease at the University of Nevada, Reno, and end with her as a witness for the federal government against her former employer, Harvey Whittemore, for illegal campaign contributions to Senate Majority Leader Harry Reid. On this journey Dr. Mikovits would face the scientific prejudices against CFS, wander into the minefield that is autism, and through it all struggle to maintain her faith in God and the profession to which she had dedicated her life.

Bats (Chiroptera) as Vectors of Diseases and Parasites - Facts and Myths (Hardcover, 2014 ed.): Sven Klimpel, Heinz Mehlhorn Bats (Chiroptera) as Vectors of Diseases and Parasites - Facts and Myths (Hardcover, 2014 ed.)
Sven Klimpel, Heinz Mehlhorn
R4,584 Discovery Miles 45 840 Ships in 10 - 15 working days

This book gathers contributions by 16 international authors on the phenomenon "bats," shedding some light on their morphology, the feeding behaviors (insects, fruits, blood) of different groups, their potential and confirmed transmissions of agents of diseases, their endo- and ectoparasites, as well as countless myths surrounding their lifestyle (e.g. vampirism, chupacabras, batman etc.). Bats have been known in different cultures for several thousand centuries, however their nocturnal activities have made them mysterious and led to many legends and myths, while proven facts remained scarce. Even today, our knowledge of bats remains limited compared to other groups in the animal kingdom. Also, their famous ability to avoid collisions with obstacles during their nightly flights with the help of a sophisticated and unique system using ultrasound waves (which are transmitted and received) is as poorly studied as birds finding their way from continent to continent. In recent times, where globalization transports millions of people and goods from one end of the earth to the other, there are increased risks posed by agents of diseases, as a result of which bats have received increasing attention as potential vectors. These suppositions are based on their proven transmission of viruses such as rabies. In dedicated chapters, the book addresses the following topics: * The world of bats * The astonishing morphology of bats * Bats as potential reservoir hosts for vector-borne diseases * Bat endoparasites * Macroparasites - ectoparasites * Glimpses into how bats fly * Blood-licking bats * Vampirism in medicine and culture * Chupacabras and "goat milkers" * Myths on candiru As such, this book provides a broad range of information for all non-experts interested in biological topics, but also for people working in this field, as well as physicians and veterinarians who are confronted with clinical cases, and for teachers and students interested in expanding their knowledge of biology and of past and present cultures.

Influenza - Therapeutics and Challenges (Hardcover): Shailendra K. Saxena Influenza - Therapeutics and Challenges (Hardcover)
Shailendra K. Saxena
R3,071 Discovery Miles 30 710 Ships in 18 - 22 working days
The Retroviridae (Hardcover, 1993 ed.): Jay A. Levy The Retroviridae (Hardcover, 1993 ed.)
Jay A. Levy
R4,373 Discovery Miles 43 730 Ships in 18 - 22 working days

In this second volume in the series The Retroviridae, the readers are treated to up-to-date reviews on these viruses, which are found in a variety of animal species. The volume begins with important observations on the general fea tures of retrovirus entry into cells as determined by the viral envelope glyco proteins and the cell surface receptors (Chapter 1). Aspects of this virus-cell interaction form the basis for the variety of biologic effects associated with this virus family. A timely review of the oncogenic feline viruses is included next (Chapter 2). These viruses, along with the avian and murine retroviruses (Volume 1, Chapters 6 and 7), have provided valuable insight into cancer induction in other animal species, including humans. Two other major groups of retroviruses, the lentiviruses and the spuma viruses, are introduced in the present volume. Initially these groups, along with oncoviruses, were the three subfamilies in the Retroviridae. This com plex virus family has now been reclassified into seven separate genera (Vol ume 1, Chapter 2). Equine infectious anemia virus is the prototype for a lentivirus (Chapter 5). One of the first viruses discovered in nature (1904), it was only relatively recently recognized as a retrovirus. Lentiviruses are asso ciated primarily with immunologic disorders such as autoimmunity and AIDS (Chapters 3-5), but their association with neurologic disease is also well established (Chapters 4 and 5, and future volumes)."

Advances in Research on Cholera and Related Diarrheas 2 (Hardcover, 1985 ed.): S. Kuwahara, N.F. Pierce Advances in Research on Cholera and Related Diarrheas 2 (Hardcover, 1985 ed.)
S. Kuwahara, N.F. Pierce
R5,306 Discovery Miles 53 060 Ships in 18 - 22 working days

Proceedings of the 18th Joint Conference on Cholera

Cytomegaloviruses, Volume II - From Molecular Pathogenesis to Intervention (Hardcover, New): Matthias J. Reddehase Cytomegaloviruses, Volume II - From Molecular Pathogenesis to Intervention (Hardcover, New)
Matthias J. Reddehase
R5,332 Discovery Miles 53 320 Ships in 18 - 22 working days

Cytomegaloviruses are members of the herpesvirus group and can infect humans and other primates. This text presents comprehensive reviews on every aspect of current research.

Human Fungal Pathogens (Hardcover, 2nd ed. 2014): Oliver Kurzai Human Fungal Pathogens (Hardcover, 2nd ed. 2014)
Oliver Kurzai
R7,721 Discovery Miles 77 210 Ships in 10 - 15 working days

Whereas plant and insect infections are commonly caused by fungi, only a small minority of the vast diversity of fungal species is pathogenic to humans. Despite this, fungal infections cause considerable morbidity and mortality worldwide. This volume is dedicated to the biology, clinical presentation and management of invasive fungal infections. Major pathogenic fungi are introduced by world-leading experts and the basic principles of fungal virulence are reviewed in the light of new results and experimental technologies that offer unprecedented insights into invasive infections caused by "Aspergillus," "Candida," "Cryptococcus," "Pneumocystis" and "Mucorales." In parallel, the clinical presentation of invasive fungal infections and current approaches to their diagnosis and treatment are summarized to provide an overview of human pathogenic fungi, linking pathogen biology to the clinical presentation of disease.

Microbial Processes and Products (Hardcover, 2005 ed.): Jos e-Luis Barredo Microbial Processes and Products (Hardcover, 2005 ed.)
Jos e-Luis Barredo
R4,120 Discovery Miles 41 200 Ships in 18 - 22 working days

The development of biotechnology over the last 20 years, and particularly the use of recombinant DNA techniques, has rapidly expanded the opportu- ties for human benefits from living resources. Efforts to reduce pollution, p- vent environmental damage, combat microbial infection, improve food production, and so on can each involve fermentation or the environmental - lease of microorganisms. Many products of fermentation technology, such as alcoholic beverages, bread, antibiotics, amino acids, vitamins, enzymes, and others, have been influenced by the progress of recombinant DNA techniques. The development of new products or the more efficient manufacturing of those already being produced often involve the use of microorganisms as cell fac- ries for many productions and biotransformations. Microbial Processes and Products is intended to provide practical expe- mental laboratory procedures for a wide range of processes and products me- ated by microorganisms. Although not an exhaustive treatise, it provides a detailed "step-by-step" description of the most recent developments in such applied biotechnological processes. The detailed protocols we provide are cross-referenced in the Notes section, contain critical details, lists of problems and their troubleshooting, as well as safety recommendations that may not n- mally appear in journal articles and can be particularly useful for those un- miliar with specific techniques.

Advances in Microbial Ecology (Hardcover, 1997 ed.): J.G. Jones Advances in Microbial Ecology (Hardcover, 1997 ed.)
J.G. Jones
R5,200 Discovery Miles 52 000 Ships in 18 - 22 working days

This is the third volume of Advances in Microbial Ecology to be produced by the current editorial board. I would, therefore, like to take this opportunity to thank my co-editors for all their efforts, particularly in maintaining a balance of subject matter and geographical distribution of the contributions. Volume 15 is no exception in that we have a balance between the prokaryo tic and eukaryotic organisms and a range of subject matter from applied ecology through process ecology to ecological theory. The response from our readers has been encouraging in the sense that the breadth of coverage is much appreciated, particularly by teachers and postgraduate/postdoctoral researchers. However, we still strive to improve our coverage and particularly to move wider than the North America/Europe axis for contributions. Similarly, we would like to see coverage of the more unusual microbes, perhaps a chapter devoted to the ecology of a particular species or genus. There must exist many ecological notes on "rarer" organisms that have not found their way into the standard textbooks or taxonomic volumes; properly compiled these could provide valuable information for the field ecologist. Ecological theory has, until recently, been the domain of the "macroecolo gist. " Recent advances in molecular techniques will ensure that the microbial ecologist will playa more significant role in the development of the subject. We shall not, therefore, change our policy of encouraging our contributors to specu late, permitting them sufficient space to develop their ideas.

Emerging Issues and Controversies in Infectious Disease (Hardcover, 2009 ed.): I.W. Fong Emerging Issues and Controversies in Infectious Disease (Hardcover, 2009 ed.)
I.W. Fong
R5,360 Discovery Miles 53 600 Ships in 18 - 22 working days

In this edition of the Emerging Infectious Diseases of the 21st Century Series, the editor reviews the research, diagnosis, and treatment of some common infections facing researchers, clinicians and family physicians such as sinusitis, otitis media and pertussis in adults. Recent studies and surveys have shown that these conditions are often over diagnosed and treated unnecessarily with antibiotics. The approach and guidelines for diagnosis and management are reviewed in this volume. Other more complicated but less common conditions challenging internists, clinical infectious disease consultants and other specialists are also reviewed (i.e. meningitis, ventilator associated pneumonia, sepsis, hepatitis C, B, etc.).

Clinical Aspects of Interferons (Hardcover, 1988 ed.): Michel Revel Clinical Aspects of Interferons (Hardcover, 1988 ed.)
Michel Revel
R5,353 Discovery Miles 53 530 Ships in 18 - 22 working days
Molecular Aspects of Papovaviruses (Hardcover, 1988 ed.): Y. Aloni Molecular Aspects of Papovaviruses (Hardcover, 1988 ed.)
Y. Aloni
R5,307 Discovery Miles 53 070 Ships in 18 - 22 working days

It is almost twenty years since the first DNA tumor virus meeting was held at Cold Spring Harbor. At this meeting studies on three tumor viruses were discussed: the papovaviruses, the adenoviruses and the herpesviruses. The present series Developments in Molecular Virology chose to reverse this sequence by first publishing books on the herpesviruses, followed by adenoviruses, and only now the papo vaviruses. All the DNA tumor viruses gained their original reputation by serving as model systems in animal cells for studying gene expression and gene regulation, but SV40 and polyoma have been the jewel in the crown in these studies, as A phage was for the study of prokaryotes. SV40 was the first DNA tumor virus to be completely sequenced that enabled the definition of the cis controlling elements in DNA replication and transcription. I am continuously fascinated by the organization of the SV40 and polyoma genomes. Although they contain about 5000 bp that encode for only 6 to 7 proteins, the mechanisms which regulated their gene expression are varied and include almost any other type of gene regulation found today to regulate eukaryotic genes. Just to mention two: (i) the early promoter is a classical promoter that contains the TAT A, CAAT and enhancer elements, while the late promoter is devoid of these elements, and (ii) the mRNA can be structurally and functionally monocistronic or dicistronic. This hints at the versatility in the control of gene expression at the transcriptional and translational levels."

Plant Viral Vectors (Hardcover, 2014 ed.): Kenneth Palmer, Yuri Gleba Plant Viral Vectors (Hardcover, 2014 ed.)
Kenneth Palmer, Yuri Gleba
R5,367 R4,589 Discovery Miles 45 890 Save R778 (14%) Ships in 10 - 15 working days

In this volume, the authors provide an excellent overview of how far the plant viral vector field has come. The discipline is no longer exclusively in the domain of academics there is a small, but growing number of small biotechnology companies that exploit plant viruses as the platform for commercial innovation in crop improvement, industrial product manufacturing, and human and veterinary health care."

Helicobacter pylori in Human Diseases - Advances in Microbiology, Infectious Diseases and Public Health Volume 11 (Hardcover,... Helicobacter pylori in Human Diseases - Advances in Microbiology, Infectious Diseases and Public Health Volume 11 (Hardcover, 1st ed. 2019)
Shigeru Kamiya, Steffen Backert
R4,074 Discovery Miles 40 740 Ships in 18 - 22 working days

This book gathers a wealth of contributions on the virulence factors and pathogenic mechanism of Helicobacter pylori, prepared by leading international experts. In addition, it explores the epidemiology, diagnosis, treatment with drugs and probiotics, and prophylaxis by vaccination, reflecting the latest advances. H. pylori is a Gram negative microaerophilic bacterium that can produce various gastric diseases including gastritis, gastroduodenal ulceration, gastric cancer and gastric MALT lymphoma. Although efforts to combat H. pylori using a combination of proton pump inhibitor and several antimicrobial drugs have significantly decreased the burden of these gastric diseases, the microbial epidemiology and gastric pathogenesis following H. pylori infection are still not fully understood. Given its scope, the book offers a valuable resource not only for basic microbiologists, but also for researchers in the fields of pathology, biochemistry and genomics, as well as medical students/scientists.

Therapeutic Applications of Ribozymes and Riboswitches - Methods and Protocols (Hardcover, 2014 ed.): Daniel Lafontaine, Audrey... Therapeutic Applications of Ribozymes and Riboswitches - Methods and Protocols (Hardcover, 2014 ed.)
Daniel Lafontaine, Audrey Dube
R3,490 Discovery Miles 34 900 Ships in 10 - 15 working days

In "Therapeutic Applications of Ribozymes and Riboswitches: Methods and Protocols, " expert researchers in the field provide a complete overview of protocols used in the development of RNA molecule as drugs and drug target. These include methods and protocols on recent and precise RNA molecule approaches or studies in the development of an RNA therapeutic tool. We are convinced that these methods will help researchers from various domains of life sciences, including clinicians, biochemists and virologists. Written in the highly successful "Methods in Molecular Biology"series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and key tips on troubleshooting and avoiding known pitfalls.

Authoritative and practical, "Therapeutic Applications of Ribozymes and Riboswitches: Methods and Protocols "seeks to aid scientists in the further development of new therapeutic applications implicating RNA molecules or directly targeting harmful RNA."

Cytomegaloviruses, Volume I - From Molecular Pathogenesis to Intervention (Hardcover, Revised ed.): Matthias J. Reddehase Cytomegaloviruses, Volume I - From Molecular Pathogenesis to Intervention (Hardcover, Revised ed.)
Matthias J. Reddehase
R5,301 Discovery Miles 53 010 Ships in 18 - 22 working days

Cytomegaloviruses are members of the herpesvirus group and can infect humans and other primates. This text presents comprehensive reviews on every aspect of current research.

Bacterial Pathogenesis - Methods and Protocols (Hardcover): Frank Deleo, Michael Otto Bacterial Pathogenesis - Methods and Protocols (Hardcover)
Frank Deleo, Michael Otto
R2,703 Discovery Miles 27 030 Ships in 18 - 22 working days

Bacterial infections affect world health today as a leading cause of morbidity and mortality. This book presents in-depth methods and state-of-the-art protocols for investigating specific mechanisms of pathogenesis for a wide range of bacteria. Written by experts in the field, this invaluable collection includes protocols to study host-pathogen interactions, animal models of infection, and novel approaches to identifying therapeutic targets designed to control infections.

Antibiotic Policies - Controlling Hospital Acquired Infection (Hardcover, 2011): Ian M. Gould, Jos W. M. van der Meer Antibiotic Policies - Controlling Hospital Acquired Infection (Hardcover, 2011)
Ian M. Gould, Jos W. M. van der Meer
R4,021 Discovery Miles 40 210 Ships in 18 - 22 working days

The first book was on "Theory and Practice" of antibiotic stewardship in its broadest sense -the how to do it and the do's and don'ts. The second, on "Controlling resistance" was very much on the relationships between use and resistance and beginning to home in on the hospital as the main generator of resistance, but mainly looking at it from a disease/clinical perspective. The last 3 chapters on MRSA, ended where the 3rd book will take off. "Controlling HAI " will concentrate on specific MDR organisms highlighting their roles in the current pandemic of HAI and emphasizing that the big issue is not so much infection control but antibiotic control, in the same way that antibiotic over-reliance/ over-use has caused the problem in the first place. Up 'till now the emphasis for controlling MRSA, C diff and all the other MDROs has very much been on IC, which clearly isn't working. This book will gather all the evidence for the increasingly popular view that much more must be done in the area of antibiotic policies/ stewardship, especially when we are in danger of a "post antibiotic" era, due to a real shortage of new agents in the pipeline.

Combined Antimicrobial Therapy (Hardcover, 1979 ed.): W. Brumfitt, L. Curcio, L. Silvestri Combined Antimicrobial Therapy (Hardcover, 1979 ed.)
W. Brumfitt, L. Curcio, L. Silvestri
R5,326 Discovery Miles 53 260 Ships in 18 - 22 working days

Proceedings of the International Workshop on Combined Antimicrobial Therapy, held in Rome, 21-22 April, 1978

CD4+CD25+ Regulatory T Cells: Origin, Function and Therapeutic Potential (Hardcover, 2005 ed.): B. Kyewski, Elisabeth Suri-Payer CD4+CD25+ Regulatory T Cells: Origin, Function and Therapeutic Potential (Hardcover, 2005 ed.)
B. Kyewski, Elisabeth Suri-Payer
R5,196 Discovery Miles 51 960 Ships in 18 - 22 working days

The vertebrate immune system defends the organism against invading pathogens while at the same time being self-tolerant to the body's own constituentsthuspreservingitsintegrity. Multiplemechanismsactinconcert to ensure self-tolerance. During intrathymic development, the nascent T cell repertoire is purged from autoreactive T cells via negative selection, a process also known as recessive tolerance. Ridding of self-reactivity, however,isnotcomplete,asattestedbythepresenceofself-reactiveTcells intheperipheralTcellrepertoire. Hence,additionaltolerancemechanisms, collectively referred to as dominant tolerance, have been postulated on theoreticalgrounds(seethechapterbyA. Coutinhoetal. inthisvolume)and experimentalprooffortheirexistencehadbeenrepeatedlyclaimedinthepast 40years. Whilesomeoftheseclaims,largelybasedoninvitroexperiments, laterfellintodisrepute(i. e. ,theinfamousCD8suppressorcellsexpressingI-J molecules),concurrent,butlesswellpublicizedstringsofresearch,provided unremitting evidence for dominant tolerance mechanisms. These include the postnatal thymectomy model pioneered by Nishizuka and Sakakura in 1969, the dominant tolerance model in chicken and quail chimeras introducedbyleDouarinandcolleagues,andstudiesoninfectioustolerance by the Waldmann laboratory. A breakthrough in this ?eld was achieved by the identi?cation and isolation by Sakaguchi's and Shevach's groups of + + aCD4 CD25 TcellsubsetexertingsuppressiononeffectorTcellsbothin vitroandinvivo. Thisinstigatedanavalancheofpublicationsonsuppressor Tcells. Whilelargelyoverlookedforsomanyyears,thereisnowhardlyany aspectofimmunitythatdoesnotseemtobeaffectedbysuppressorTcells. This volume will hardly be more than a snapshot in thisfast-moving ?eld, yetwehopethatitwillofferinspirationandorientationtothescientistwho wouldliketoenterthis?eld. To date, many different cells have been described that can suppress + + other cells of the immune system: CD4 CD25 regulatory T cells (Treg), + ? CD4 CD25 regulatory T cells, T regulatory 1 cells (Tr1), T-helper 3 cells + ? (Th3),CD8 CD28 Tcells,NKTcells,aswellastolerogenicdendriticcells. Suppressive CD4 T cells fall at least into two categories. So called natural VI Preface + + CD4 CD25 Tregformpartoftheintra-thymicallyselectedTcellrepertoire andapparentlyconstituteadistinctlineage. Incontrast,"adaptive"regulatory Tcellsareinstructedintheperipherytobecomesuppressivecells,theyform + + amoreheterogeneousgroupincludingCD4 CD25 Treg,Tr1,andTh3cells. As natural Treg are so far the best characterized entity, the ?rst three contributionsofthisvolume(C. Cozzoetal. ,C. -S. Hsiehetal. ,andL.

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