This is comprehensive overview of a vital area of scientific enquiry, which covers a broad spectrum of issues. With contributions from some of the key researchers in the field, Adult Stem Cells: Biology and Methods of Analysis offers readers a historical perspective as well as unique insights into cutting-edge thoughts. The volume contextualizes the recent discovery of stem/progenitor cell populations resident in many adult tissues and organs. It confronts the complexities scientists face in trying to validate these cells, while it also describes and critically evaluates the methods currently used to assess stem cell self-renewal. The chapters also seek to distinguish this process from other aspects of cell survival, such as the regulation of life span, senescence, and immortalization at a molecular level. The monograph begins with a section that examine the basic biology of adult stem cells, including chapters on the emerging role of microRNAs in regulating their fate and the molecular mechanisms that govern their self-renewal, the book moves on to analyze the varying methodologies employed in characterizing these elusive elements of our genetic make-up. The second section details in-vivo lineage tracing of tissue-specific stem cells, explores the neural stem cell paradigm, and considers the function of ABC transporters and aldehyde dehydrogenase in adult stem-cell biology. The final section shifts the focus to the life-span regulation and immortalization and features a chapter on the cancer stem cell paradigm. This is an authoritative volume on one of the frontiers of genetic research, and will serve as a valuable resource, not just for established scientists but also for those now entering the field of stem cell biology.

Adult Stem Cells, second edition, takes a critical look at issues concerning the developmental or differentiation potential for a variety of tissue types and for specific adult stem cell types. Since the first edition appeared a decade ago, our understanding of adult stem cells, and more specifically tissue-specific adult stem cells, has advanced tremendously. And an increased interest in regenerative medicine and potential stem cell applications has driven a quest for better understanding of stem cell biology. In turn, this has spawned much activity on generation and utilization of more and better reagents to identify and isolate stem cells and stem cell-like subpopulations, and on assays elucidating their developmental or differentiation potential and functional integration with host tissues and organs. In this fully updated new edition, chapters cover topics ranging from signaling pathways maintaining stemness in hematopoietic cells to regeneration after injury and endocrine mechanisms underlying the stem cell theory of aging. Other chapters cover stem cells by organ or system including pituitary, cardiac, epithelial, teeth, lung, ovary, prostate, liver, and many more. Importantly, the authors of the chapters have not only summarized their successes, but have also summarized some of the difficulties that each particular field is still facing with respect to maximizing the utility of stem cells in clinical settings. Collectively, they impart both the excitement and challenges facing stem cell utilization for repair and regeneration making this book essential reading for those involved in stem cell research as well as those involved in clinical assays.

Since the first successful isolation and cultivation of human embryonic stem cells at the University of Wisconsin, Madison in 1998, there has been high levels of both interest and controversy in this area of research. This book provides a concise overview of an exciting field, covering the characteristics of both human embryonic stem cells and pluripotent stem cells from other human cell lineages. The following chapters describe state-of-the-art differentiation and characterization of specific ectoderm, mesoderm and endoderm-derived lineages from human embryonic stem cells, emphasizing how these can be used to study human developmental mechanisms. A further chapter discusses genetic manipulation of human ES cells. The concluding section covers therapeutic applications of human ES cells, as well as addressing the ethical and legal issues that this research have raised.

Stem cells appear to be fundamental cellular units associated with the origin of multicellular organisms and have evolved to function in safeguarding the cellular homeostasis in organ t- sues. The characteristics of stem cells that distinguish them from other cells have been the fascinating subjects of stem cell research. The important properties of stem cells, such as ma- tenance of quiescence, self-renewal capacity, and differentiation potential, have propelled this exciting ?eld and presently form a common theme of research in developmental biology and medicine. The derivation of pluripotent embryonic stem cells, the prospective identi?cation of multipotent adult stem cells, and, more recently, the induced pluripotent stem cells (popularly called iPS) are important milestones in the arena of stem cell biology. Complex networks of transcription factors, different signaling molecules, and the interaction of genetic and epi- netic events constantly modulate stem cell behavior to evoke programming and reprogramming processes in normal tissue homeostasis during development. In any given cellular scenario, the regulatory networks can pose considerable complexity and yet exert an orderly control of stem cell differentiation during normal development. An aberration in these ?nely tuned processes during development usually results in a spectrum of diseases such as cancers and neurological disorders. Thisunderscorestheimminentneedforamorecompleteunderstandingofmolecular mechanisms underlying the regulatory circuitries required for stem cell maintenance. Overthepast3–5years,adiversegroupofbenchandphysicianscientistshaveprospectively enhanced our knowledge of stem cell biology. These studies are unveiling many unrecognized or previously unknown fundamentals of developmental biology.

The emerging field of human embryonic stem cell biomedicine crosses many disciplinary boundaries-cell biology, reproductive biology, embryology, molecular biology, endocrinology, immunology, fetal med

Beginning with a basic introduction to the field, this book provides a comprehensive review of the properties and potential uses of stem cells, including stem cells in tissue engineering, cancer, gene therapy and in dental tissues. Stem Cells compares two key types of mammalian stem cell - embryonic and adult. Different stem cell systems are discussed, as well as potential obstacles in the use of human stem cells.

The Indian institution of dentures sitting in a glass of water beside the bed could berendered obsolete by scientists who are confident that people will soon be able to replace lost teeth by growing new ones instead of false teeth, a small ball of cells capable of growing into a new tooth will be implanted where the missing one used to be the procedure needs only a local anesthetic and the new tooth should be fully formed within a few months of the cells being implanted. Paul Sharpe, a specialist in the field of regenerative dentistry at the Dental Institute of king's College, London, says the new procedure has distinct advantages over false teeth that require a metal post to be driven into the jaw before being capped with a porcelain or plastic tooth. The surgery today can be extensive and you need to have good solid bone in the jaw and that is a major problem for some people," The method could be used on far more patients because the ball of cells that grows in to a tooth also produces bone that anchors to the jaw. The choice of growing a new tooth is likely to appeal to patients. "Anyone who has lost teeth will tell you that, given the chance, they would rather have their own teeth than false ones," The average indian over 50 has lost 12 teeth from a set of 32. The procedure is fairly simple. Doctors take stem cells from the patient. These are unique in their ability to form any of the tissues that make up the body. By carefully nurturing the stem cells in a laboratory, scientists can nudge the cells down a path that will make them grow into a tooth. After a couple of weeks, the ball of cells, known as bud, is ready to be implanted. Tests reveal what type of tooth - for example, a molar: an incisor - the bud will form, Using a local anaesthetic, the tooth bud is inserted through a small incision into the gum. Within months, the cells will have matured into a fully-formed tooth, fused to the jawbone. As the tooth grows, it releases chemicals that encourage nerves and blood vessels to link up with it.

In recent years political, religious, and scientific communities have engaged in an ethical debate regarding the development of and research on embryonic stem cells. Does the manipulation of embryonic stem cells destroy human life? Or do limitations imposed on stem cell research harm patients who might otherwise benefit? John Lynch’s What Are Stem Cells? identifies the moral stalemate between the rights of the embryo and the rights of the patient and uses it as the framework for a larger discussion about the role of definitions as a key rhetorical strategy in the debate. In the case of stem cells, the controversy arises from the manner in which stem cells are defined--in particular, whether they are defined with an appeal to their original source or to their future application. Definitions such as these, Lynch argues, are far more than convenient expository references; they determine the realities of any given social discourse. Lynch addresses definitions conceptually--their stability in the face of continual technological innovation, their versatility at the crossroads of scientific and public forums, and their translations and retranslations through politics. Most importantly, his work recognizes definitions as central to issues, not only within the topic of stem cell research, but also in all argumentation.