The Neuroendocrine Leydig Cells And Their Stem Cell Progenitors The Pericytes

cells, and the testicular localization of the intermediate filament protein nestin, known to be expressed in neural stem cells, by our group was the first step to define mural cells (pericytes and vascular smooth muscle cells) of the testis microvascu- ture as the stem/progenitor cells of the adult Leydig cells. In summary, we were able to demonstrate specific proliferation of vascular progenitors and their subsequent transdifferentiation into steroidogenic Leydig cells, which – in addition – rapidly acquire neuronal and glial properties. Since both newly developed fetal and adult Leydig cell populations show the same features, a common origin of both popu- tions seems likely. Pericytes are distributed throughout the body, and there is convincing evidence for their stem/progenitor cell properties in diverse organs. Under appropriate (locally defined) conditions these pericytes, which reside in the vascular stem cell niche as dormant stem cells, become activated, proliferate, migrate and differentiate towards different somatic cell types of the body. Since most mesenchymal stem/ progenitor cell types exhibit essential similarity to pericytes and certain mesenchymal stem cells represent pericyte descendants, we propose that mesenchymal stem cells in the perivascular niche are daughter cells of pericytes. Thus, pericytes are promising candidates for ancestor cells of all adult stem cells in the organism. There is strong evidence that early stem cells (cells arising during embryogenesis), such as the pericytes, exhibit both mesodermal and neural progeny, which might explain the neuroendocrine properties of the Leydig cells.

The present book is an attempt to describe the most recent developments in the area of pericyte biology which is one of the emergent hot topics in the field of molecular and cellular biology today. Here, we present a selected collection of thirteen detailed chapters on what we know so far about pericytes in distinct organs in physiological and pathological conditions. Further, it provides an update on the most novel functions attributed to these cells and will introduce a newer generation of researchers and scientists to the importance of these cells, ranging from their discovery in different organs through current state-of-the-science. It will be invaluable for both advanced cell biology students as well as researchers in cell biology, stem cells and vascular research. This volume explores pericytes' physiologic roles in different tissues, ranging from the pancreas, lungs and liver through skeletal muscle, gut, retina and more. Together with its companion volumes Pericyte Biology in Disease and Pericyte Biology – Novel Concepts, Pericyte Biology in Different Organs presents a comprehensive update on the latest information and most novel functions attributed to pericytes. To those researchers newer to this area, it will be useful to have the background information on these cells' unique history. It will be invaluable for both advanced cell biology students as well as researchers in cell biology, stem cells and researchers or clinicians involved with specific organs.

This book presents the current state of knowledge on the origin and differentiation of cell lines involved in the development of the vertebrate male and female gonads with particular emphasis on the mouse. It also discusses the processes leading to the testis- and ovary-specific structures and functions. The individual chapters review the origin and differentiation of the somatic cells of the genital ridges; the formation and migration of primordial germ cells in mouse and man; the gonadal supporting cell lineage and mammalian sex determination; differentiation of Sertoli and granulosa cells; mesonephric cell migration into the gonads and vascularization; origin and differentiation of androgen-producing cells in the gonads; germ cell commitment to the oogenic versus spermatogenic pathway and the role of retinoic acid; ovarian folliculogenesis; control of oocyte growth and development by intercellular communication within the follicular niche; biology of the Sertoli cell in the fetal, pubertal and adult mammalian testis; mechanisms regulating spermatogonial differentiation; stem cells in mammalian gonads; the role of microRNAs in cell differentiation during gonad development; human sex development and its disorders; as well as methods for the study of gonadal development.

Offering comprehensive coverage of this fast-changing field for more than 20 years, Urologic Surgical Pathology is an expert guide to all common and rare entities in the genitourinary system. The 4th Edition keeps you fully up to date with discussions of newly recognized tumors and terminologies, the latest classification schemes, current grading approaches, molecular alterations, and commonly used ancillary diagnostic techniques. With its clinical focus on day-to-day urological pathology sign-out and an emphasis on clinicopathologic and radiographic-pathologic correlations, this thoroughly revised uropathology reference is an excellent resource for diagnostic decision making. Includes expanded coverage of differential diagnosis for all tumor types encountered in urological surgical pathology practice. Incorporates the latest TNM staging and WHO classification systems, as well as new diagnostic biomarkers and their utility in differential diagnosis, newly described variants and new histologic entities. Discusses advances in molecular diagnostic testing, its capabilities, and its limitations, including targeted therapy/personalized medicine. Covers new developments in immunohistochemistry and the latest diagnostic tumor markers. Features more than 1,600 high-quality images – all in color – including gross pictures, histopathologic and cytopathologic images, special stains, other ancillaries, drawings, and illustrations. Helps you find information quickly with a consistent chapter format; an abundance of tables, diagrams and flowcharts; boxed lists of types and causes of diseases; differential diagnosis; characteristic features of diseases; complications; classifications; and staging.

This unique book by leading experts reviews the key therapeutic issues related to stem cell technology.

The sixth edition of The Kelalis-King-Belman Textbook of Clinical Pediatric Urology presents state-of-the-art knowledge and common-sense practice in all areas of clinical pediatric urology in a single, easily accessible volume. Clinical in orientation and practical in presentation, it covers every disorder and disease, diagnostic method, and appropriate treatment in pediatric urology from the embryo onwards. Widely acknowledged as the leading reference in the field, the book is essential reading for all practitioners who deal with urological disorders of childhood, whether trainees, residents or experienced specialists. The book begins with chapters on evaluating the patient and general principles of pediatric urology, including the use of advanced diagnostic imaging techniques and the increasing importance of minimally invasive surgical techniques. It then proceeds through the entire urinary tract from adrenal gland to external genitalia, discussing anatomy, normal and abnormal development, anomalies and diseases and their treatment.

The current state of the science supporting new research in lysophospholipids The study of lysophospholipids exploded with the discovery of cell surface receptors on both lysophosphatidic acid (LPA) and sphingosine 1-phosphate (S1P). Since then, thousands of original research reports ranging from fundamental cell signaling to the physiology and pathophysiology of individual organ systems have centered on lysophospholipids. This book draws together and analyzes the current literature to provide readers with a state-of-the-science review as well as current techniques that support research in all aspects of the field of lysophospholipid signaling. Lysophospholipid Receptors is divided into three sections: Receptors and other possible effectors Enzymes Physiology and pathophysiology Within each section, the authors explain the similarities and differences between LPA and S1P signaling. Examples are provided that demonstrate the underlying mechanisms of lysophospholipid signaling across a broad range of organ systems, such as S1P signaling in cardiovascular physiology and disease and the neural effects of LPA signaling. Extensive references at the end of each chapter provide a gateway to the literature and facilitate further research into individual topics. Each chapter has been authored by one or more leading international authorities in lysophospholipid research. Based on a thorough analysis of the current research, the authors set forth what is established science and offer their expert opinion and perspective on new and emerging areas of research, setting the stage for further investigations that will solve current problems in the field.

Much research has focused on the basic cellular and molecular biological aspects of stem cells. Much of this research has been fueled by their potential for use in regenerative medicine applications, which has in turn spurred growing numbers of translational and clinical studies. However, more work is needed if the potential is to be realized for improvement of the lives and well-being of patients with numerous diseases and conditions. This book series 'Cell Biology and Translational Medicine (CBTMED)' as part of SpringerNature’s longstanding and very successful Advances in Experimental Medicine and Biology book series, has the goal to accelerate advances by timely information exchange. Emerging areas of regenerative medicine and translational aspects of stem cells are covered in each volume. Outstanding researchers are recruited to highlight developments and remaining challenges in both the basic research and clinical arenas. This current book is the sixth volume of a continuing series.