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This book describes general glycobiology in emphasizing the structures, biosynthesis, glycosylation and distribution of the glycans and xenogenic glycoantigens in eukaryotic cells of mammals including mouse, swine, chimpanzee and human. In the middle, I have focused on topics in xenotransplantation glycobiology and expand descriptions of allogenic and xenoantigenic transplantation to open the dawn in insights into the origin of life. One of the biological diversity, named species diversity, is a phenomenon environmentally adapted from the evolutionary process for long period. The distinct structures of glycans discriminate each organism and are the essential molecular basis of the discrimination and difference between the organisms, giving an incompatibility between the different species. Diversity and variations in carbohydrate chain structures between family, species, kingdoms and domains mark the global pattern and signs of immune self- and non-self recognition. In human, diversity in ABH blood group antigens is observed in human family and this type pattern distinguishes individuals from a pan-family to non-dividable unit of the family. Blood transfusion and organ transplantation are impossible even in the allogenic cross between humans if carbohydrates are ignored. This explains how and how human beings are a lonely existence. ABH-related antibodies induce hemolysis or hyperacute or allograft rejection due to incompatible graft property even between the same species. The incompatibility is an immunologic rejection when the recipient host receives the tissues or organs from the different species of donors, as well-known in pig-to-human xenotransplantation. The immunologic incompatibility between the donor pigs and the recipient human are based on the evolutionary distance between pigs and humans. This distance allows a xenograft rejection between the 2 mammals. Modification or deletion of the specific gene locus for immune rejection on genome of donor animalsdisrupts the immunological recognition ligands of the donor organs, consequently preventing the immune rejection of the human recipient and xenograft rejection. This book helps undergraduate and graduate students, researcher and professors who are involved in the glycobiology and xenoantigenic biology with recent advances in the xenotransplantation basic and clinic.

Species of Contagion examines the political and social implications of xenotransplantation for bodies, nations, and species. Scientists are demonstrating a renewed interest in developing transplants for humans with tissues from pigs, with the aid of genetic engineering techniques, immunosuppressant drugs, and novel cellular technologies. Yet, some argue that these transspecies promiscuities threaten to enable new viruses to emerge in human populations. Drawing on the later works of Foucault, this book analyses contemporary power relations in animal-to-human transplantation research, ranging across governmental regulation, scientific understandings of infectious disease, and animal ethics. While many xenotransplantation practices resonate with a security approach that renders uncertainty an inherent condition of life and encourages adaptation across species boundaries, government regulation and industry also reinscribe sovereign boundaries of bodies, species, and nations. Species of Contagion illustrates the variation in the cultural and scientific imaginaries that governments and industry bring to bear on the problematic of xenotransplantation.

This title provides an illuminating examination of the current state of xenotransplantation – grafting or transplanting organs or tissues between members of different species – and how it might move forward into the clinic. To be sure, this is a critical topic, as a major problem that remains worldwide is an inadequate supply of organs from deceased human donors, severely limiting the number of organ transplants that can be performed each year. Based on presentations given at a major conference on xenotransplantation, this title includes important views from many leading experts who were invited to present their data and opinions on how xenotransplantation can advance into the clinic. Attention was concentrated on pig kidney and heart transplantation as it is in regard to these organs that most progress has been made. Collectively, these chapters effectively highlight the many advantages of xenotransplantation to patients with end-stage organ failure, thereby encouraging the mapping of a concrete pathway to clinical xenotransplantation. The book is organized across 22 chapters, beginning with background information on clinical and experimental xenotransplantation. Following this are discussions addressing how pigs can be genetically engineered for their organs to be resistant to the human immune response through deletion of pig xenoantigens, and the insertion of ‘protective'human transgenes. Subsequent chapters analyze complications that arise in practice, comparing allotransplant and xenotransplant rejection. The selection of the ideal patients for the first clinical trials is discussed. Finally, the book concludes with an analysis on the regulatory, economic, and social aspects of this research, including FDA perspectives and the sensitive, psychosocial factors regarding allotransplantation and xenotransplantation. A major and timely addition to the literature, Clinical Xenotransplantation will be of great interest to all researchers, physicians, and academics from other disciplines with an interest in xenotransplantation.

This title was first published in 2003. Xenotransplantation - the transplantation of animal organs into humans - poses a fascinating moral dilemma. Should this ability to extend the lives of millions of older people be permitted given that it might trigger a new pandemic similar to AIDS? This study examines the moral dilemma from a combination of humanistic, legalistic, bioethical, economical and technological perspectives. The first part of the book demonstrates that xenografts are the only realistic near-term technological answer to the organ shortage problem. The balance of the book is devoted to assessing whether doctrines such as the'right to health care'trump the moral and ethical conundrums posed by xenotransplantation. The book concludes with a'geoethical'solution that proposes authorization of xenotransplantation subject to the prior implementation of a new international organization for epidemiology and basic health care. It also suggests that the costs of operating such an organization could be covered by a global tax on xenografts.

Die Knappheit an Spenderorganen ist ein großes Problem. Um diesem abzuhelfen, gibt es Forschungsbemühungen, tierische Zellen und Organe als Ersatz zu verwenden. Bei der sogenannten Xenotransplantation sollen Zellen und/oder ganze Organe vom Tier dem Menschen implantiert werden. Wenngleich sich die medizinische Forschung noch im vorklinischen Stadium befindet, ist in absehbarer Zeit mit klinischen Studien zu rechnen. Mit der Xenotransplantation gehen zentrale Fragen zum praktischen und ethischen Selbstverständnis des Menschen einher, die verschiedene Felder der Angewandten Ethik betreffen: Wie ist die Xenotransplantation ethisch zu bewerten? Was bedeutet sie für die personale Identität? Wie lässt sich das Verhältnis von Mensch und Tier in ethischer und anthropologischer Perspektive begreifen? Was bedeutet dies für den Umgang mit Tieren? Und welche kulturellen und religiösen Herausforderungen können sich ergeben? Das Buch geht diesen und weiteren Fragen nach, indem es den gegenwärtigen biomedizinischen Forschungsstand der Xenotransplantation anschaulich darstellt, um diese dann aus kulturwissenschaftlicher, theologischer und ethischer Perspektive zu reflektieren.

This text highlights seminal discoveries and also provides comprehensive and state-of the-art approach to mouse models of human patient tumors. These areas include training, basic techniques, as well as general troubleshooting. Subsequent chapters focus on the different mouse models of patient tumors including the various strains of immunodeficient mice currently available and the transplantation techniques that can be used as well as state-of-the-art imaging techniques. Practical applications of the models from drug discovery, genome analysis to personalized treatment are also covered. Written by experts in that field, each of these sections address these critical issues. A brief review of the existing literature addressing the particular topic follows in each section.Presently, there is no single source to provide information on technique and uses of mouse models of human patient tumors. Patient-Derived Mouse Models of Cancer will satisfy this need for cancer researchers, oncologists, pharmaceutical and biotechnology industry scientists as well as molecular biologists studying in vivo systems

Alors que la psychanalyse commence à répandre les théories freudiennes plaçant la sexualité au centre des psychoses et névroses, le Docteur Voronoff, lui, soigne les organes génitaux. Excellant dans l'art des greffes, il agit en chirurgien et non en psychologue. Pour lui, le désir est entre les jambes et non dans le cerveau. En avance sur son temps, Voronoff découvre l'importance fondamentale des glandes sexuelles dans les comportements et l'esprit humains. Mais sa réputation sulfureuse finira par se retourner contre sa valeur scientifique dans un combat entre éthique et raison.

Carbohydrate antigens on glycoconjugates of mammalian cells play crucial roles in various biological processes and are epitopes recognized by the immune system, as glycobiology has hugely been progressed during the past two decades. The book focuses on sialic acid–based xenoantigenes. In pig to human xenotransplantation, exposure of pig organs to human blood results in hyper acute rejection (HAR), caused by differences in carbohydrate epitopes between human and pig vascular endothelia. Although Gal-antigen as major antigen was eliminated, the remaining non-Gal antigens are considered to be xenoantigens. Sialosyl-Tn or Hanganutziu-Deicher (HD), are non-Gal antigens specific to natural antibodies in human. To overcome rejection responses such as HAR, studies of genes involved in carbohydrate antigens, causing xenoantigenicity, are necessary. Knowledge of pig glycosyltransferases are also useful to apply to xenoantigen masking or identification of the xenoantigenic sialylglycan(s). In the first chapter the screening for pig glycosyltransferase genes for xenoantigens is presented. In the chapter II to IV the cloning, characterization, and investigation of the regulatory mechanism of the pig CMAH gene in NeuGc biosynthesis is shown. Lastly, the effects of an alteration of pig glycosylation patterns on human serum-mediated cytotoxicity, caused by human sialyltransferases including hST6GalNAc IV is presented.

This is a time ofexcitement and progress in the field ofxenotransplantation. The work described in this book traces the development of the science of cross-spe­ cies transplantation, summarizes the current state ofour knowledge, and focuses on approaches directed toward future clinical application. The important question is not whether xenotransplantation will succeed, but rather how and under what circumstances xenografts will provide predictable enough results to warrant clinical application. The fact that the best results to date in clinical xenografting were achieved over three decades ago should not be a matter of discouragement, but rather a stimulus to apply new approaches to this area of work. The shortage of human organs for transplantation is cited frequently as the driving force behind the increased interest in xenotransplantation. This shortage is an undeniable fact, but there are additional potential advantages of xenotrans­ plantation, such as the ability to schedule replacement surgery on an elective basis and the modification of animals, organs, and tissues to improve acceptabil­ ity in the human host. The advances in the basic science ofxenotransplantation outlined in this book give hope that the immunologic barriers to xenotransplantation will be overcome and that transplanted organs and tissues will succeed consistently in humans. However, if our experience with human allografts provides an analogy, we may anticipate that clinical progress in xenografts will be plagued by failures and rewarded by successes, often without a complete understanding of the mechan­ isms involved.

Some developing biotechnologies challenge accepted legal and ethical norms because of the risks they pose. Xenotransplantation (cross-species transplantation) may prolong life but may also harm the xeno-recipient and the public due to its potential to transmit infectious diseases. These trans-boundary diseases emphasise the global nature of advances in health care and highlight the difficulties of identifying, monitoring and regulating such risks and thereby protecting individual and public health. Xenotransplantation raises questions about how uncertainty and risk are understood and accepted, and exposes tensions between private benefit and public health. Where public health is at risk, a precautionary approach informed by the harm principle supports prioritising the latter, but the issues raised by genetically engineered solid organ xenotransplants have not, as yet, been sufficiently discussed. This must occur prior to their clinical introduction because of the necessary changes to accepted norms which are needed to appropriately safeguard individual and public health.

Addressing the important perspectives on xenotransplantation and human embryonic stem cell research, this book explores both the enthusiastic proponents and vehement resistance to these new biomedical technologies. Investigating the political, social, and ethical forces behind this kind of research and development, as well as the commercial actors and strong financial incentives that are necessary, these stories of hope, fear, and hype are matched by stories of success, failure, and fraud, showing how these technologies have become truly polarizing.

Title from PDF cover (viewed on Feb. 22, 2007).

Internationally recognized scientists, clinicians, and technologists review and explain the fundamental molecular and cellular biology that has been applied to the emerging field of transplant immunology and xenotransplantation, and what impact these advances might optimally have on medicine and science. The authoritative experts writing here-many of whom made the basic discoveries underlying the recent advances-examine the biological and immunological hurdles to xenotransplantation, illuminating how the immune system interacts with the xenograft and laying a practical foundation for the use of genetic engineering and animal transplants in the treatment of human disease.

The plight of a patient waiting months, sometimes years, for an organ transplant is one of the most heart-wrenching predicaments confronting medicine today. But the current critical shortage of human donor organs has had one positive consequence: it has stimulated promising new research into the field of xenotransplantation--the transplantation of organs from one animal species to another. In Xeno: The Promise of Transplanting Animal Organs Into Humans, David Cooper and Robert Lanza explore what may become one of the greatest medical advances of the 21st century. As scientists genetically engineer animal organs to evade the problems of rejection, we can expect a tremendous increase in xenotransplantation. This book recounts the several historical attempts to transplant animal organs into humans, and draws attention to the immense potential and promise of this form of therapy. The problems which remain, and recent breakthroughs in overcoming rejection and in'humanizing'pig organs for transplantation, are fully discussed. The authors also provide a fascinating consideration of the social and ethical questions posed by such procedures. Which patients should be the first to be offered this new form of therapy? Will transplanted animal organs transfer infectious viruses to the human recipient, and will they then be passed on to the community at large? Can society afford the major increase in healthcare expenditure that will result from our ability to provide a limitless number of donor organs? With profound implications for human health and longevity in the next millennium, Xeno is essential reading for anyone interested in the future of medicine.

Xenotransplantation involves the transplantation of cells, tissues, and whole organs from one species to another. Interest in animal-to-human xenotransplants has been spurred by the continuing shortage of donated human organs and by advances in knowledge concerning the biology of organ and tissue rejection. The scientific advances and promise, however, raise complex questions that must be addressed. This book considers the scientific and medical feasibility of xenotransplantation and explores the ethical and public policy issues surrounding the possibility of renewed clinical trials. The volume focuses on the science base of xenotransplantation, public health risks of infectious disease transmission, and ethical and public policy issues, including the views of patients and their families.