Gonadotropin Releasing Hormone Gnrh

Gonadotropin-releasing hormone (GnRH) cells are the key regulators of reproductive function in all vertebrate organisms. The GnRH molecule is synthesized in a small number of neurons in rostral hypothalamic regions of the brain. In mammals, these neurons release the GnRH decapeptide into the portal capillary system leading to the anterior pituitary gland. There, GnRH causes the release of the gonadotropins, luteinizing hormone (LH) and follicle-stimulating hormone (FSH), which in turn act upon the gonads to stimulate their maturation, and to cause synthesis of sex steroid hormones, estrogen, progesterone and testosterone. Although each of the levels of the hypothalamic-pituitary-gonadal axis is critical for reproductive function, GnRH neurons play the primary role in the control of reproductive maturation and adult reproductive function, and may even play a role in reproductive senescence. Since its discovery in 1970, there has been intense interest in GnRH-producing neurons, with more than 8000 papers and chapters in the last decade alone. Despite this activity of research in basic and clinical science, there has never been a book written specifically on GnRH neurons. GnRH: The Master Molecule of Reproduction aims to bring together the large and diverse literature of both laboratory and applied research that focuses on these unique cells. This book will provide basic background into reproductive neuroendocrinology, as well as specifics regarding the role of GnRH neurons in the control of reproduction. Students studying endocrinology, reproduction, neuroendocrinology or molecular endocrinology will benefit from this book. In addition, this book will take a multi-species approach which will be useful both to basic researchers as well as clinicians. Whenever possible, species differences and similarities will be presented, and if possible, studies on humans, or the clinical relevance of basic research findings to humans will be discussed (such as the treatment of reproductive disorders such as abnormalities in pubertal development, or infertility).

The GnRH Neuron and its Control examines the developmental biology of GnRH neurons including their birth in the nasal placode of the early embryo, perinatal programming, and sexual differentiation, in addition to the hypothalamic mechanisms that control GnRH neurons in adulthood to generate pulsatile and surge modes of GnRH secretion throughout the major life stages including aging. The morphology, electrophysiology, signal transduction pathways, transcriptional regulators, and genomics underlying function of the adult GnRH neuron is discussed in detail, as is the neuroendocrinology and cell biology governing the generation of both modes of GnRH release. The book also reviews the neurobiological mechanisms and circuitry responsible for the modulation of the activity of GnRH neurons by season, stress, nutrition, and metabolism, and covers the current and potential therapeutic approaches to regulating GnRH secretion and action. Filled with newly identified research and classical fundamental knowledge to GnRH biology, it will provide students, researchers, and practitioners with an in-depth understanding of reproductive neuroendocrinology. This is the fifth volume in the Masterclass in Neuroendocrinology Series, a co- publication between Wiley and the INF (International Neuroendocrine Federation) that aims to illustrate highest standards and encourage the use of the latest technologies in basic and clinical research and hopes to provide inspiration for further exploration into the exciting field of neuroendocrinology.

This book offers updates on the full range of contemporary GnRH knowledge, as articulated by authoritative contributors with extensive neurophysiology experience. In this new comprehensive volume, internationally-renowned experts explain what GnRH is, describe how it works, follow its associated pathology, and predict where future GnRH research is likely headed. These objectives are clearly developed by sixteen concise yet thorough chapters covering themes across human clinical medicine, veterinary science, marine organisms, and transitional states as observed in so-called living fossils, as well as invertebrate biology. The authors depict GnRH fundamentals as a starting-point for examination of more recent data in this rapidly evolving field. Although ideally suited for the senior GnRH researcher, anyone with an early, basic interest in neuroendocrinology will also find this book highly approachable. Fully illustrated, indexed and annotated, this edition is an essential item in any modern personal or institutional GnRH library collection.

Now in a revised and expanded third edition, this case-based guide emphasizes the latest investigative advances in both imaging and molecular diagnostics and new treatment approaches for a wide variety of common and complex endocrine conditions. Utilizing unique clinical case histories, each main endocrine condition and disorder is curated by a senior Section Editor with an introduction to his or her area covering both physiology and pathophysiology. This introductory chapter is followed by a number of case histories written by invited experts and designed to cover the important relevant pathophysiology, following a consistent chapter format for ease of use, including bulleted objectives, case presentations, review of the diagnosis, lessons learned, and 3-5 multiple-choice review questions. Section headings include the pituitary, thyroid (overactivity, underactivity and cancer) and parathyroid, adrenal disorders, metabolic bone disease, type 2 diabetes, lipid abnormalities, obesity, and pregnancy. Topics new to this edition include PCOS, transgender medicine and the endocrine effects of viral infections. With a focus on covering major parts of the APDEM curriculum, A Case-Based Guide to Clinical Endocrinology remains a tremendous resource for junior and veteran clinicians alike.

This eBook provides a comprehensive overview of our current knowledge on Gonadotropin-releasing hormone receptor evolution, structure, signaling and functions. Apart from review articles, it comprises exciting new research, as well as hypotheses and perspectives, all of which are valuable in guiding our further research in this field.

Now in its second edition, the Oxford Textbook of Endocrinology and Diabetes is a fully comprehensive, evidence-based, and highly-valued reference work combining basic science with clinical guidance, and providing first rate advice on diagnosis and treatment.

This volume summarizes the evolution and physiology of GnRH molecules and receptors, and provides insight as to how social behavior influences cellular and molecular events in the brain from a comparative perspective. The chapters in this volume are divided into three major sections: Development and Cell Migration, GnRH Receptors, Physiology and Regulation. The review papers arose primarily from presentations made at the Second International Symposium on the Comparative Biology of GnRH, held in Penang, Malaysia, June 2-4, 2001; a satellite symposium in conjunction with the XIV International Congress of Comparative Endocrinology, Sorrento, Italy. In addition, leading neuroscientists doing cutting-edge research in the field of GnRH were invited as authors to make this volume a valuable reference.