Download or read book The Role of Growth Hormone in the Developmental Regulation of Insulin Like Growth Factor I Gene Expression written by Lungile Nokukhanya Nobuhle Shoba and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Insulin-like growth factor I (IGF-I) gene expression is under developmental control, however, molecular mechanisms governing its regulation remain poorly defined. Growth hormone (GH), whose action is mediated by the GH receptor (GHR), is a major regulator of IGF-I gene expression. The expression of IGF-I and GHR mRNA is widely distributed, with the liver being the primary site of expression of both genes. Mechanisms of GH action are known, however signal transduction pathways that mediate GH activation of the IGF-I gene are undefined. In this series of studies, we investigated what factors determine IGF-I gene expression during development. RNase protection assays and Western blot analysis demonstrated that the expression of the IGF-I gene correlates with GHR expression in all the rat tissues we examined such as liver, testis, skeletal muscle, heart, kidney, lung and brain. Further, with the exception of insulin receptor substrate 1 (IRS-1), GH signaling molecules were expressed at all stages of development. In addition, levels of hepatic and brain nuclear protein binding to IGF-I foot print I (IGFI-FPI), a protein binding site in the major promoter of the rat IGF-I gene that is important for basal promoter activity in vitro, were similar throughout development, demonstrating that the IGFI-FPI is likely not involved in the developmental regulation of IGF-I gene expression. These data indicated a critical role of GHR in determining levels of IGF-I gene expression during development. However, increasing the level of GHR expression in fetal rat hepatocytes did not induce GH-dependent IGF-I gene expression, despite inducing GH-dependent activation of genes with defined GH responsive elements such as c-fos and spi 2.1 in these cells. This indicated that in addition to GHR expression, regulation of factors operating at a post-receptor level is likely to be important for inducing GH-mediated IGF-I gene expression. This led us to begin to define the signal transduction pathways that are utilized by GH to mediate IGF-I gene expression. We show that PI3-kinase and the ERKs are important for GH dependent regulation of IGF-I gene expression in rat hepatocytes, with PI3-kinase having a more robust effect.
Download or read book The Growth Hormone Insulin Like Growth Factor Axis during Development written by Isabel Varela-Nieto and published by Springer Science & Business Media. This book was released on 2005-12-17 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Insulin-like growth factor (IGF)-I is a widely expressed growth factor with diverse effects on many tissues throughout development and in adult life. The purpose of this work is to provide detailed and updated information on the role of the growth hormone (GH)-IGF axis in fetal and postnatal development, as well as its physiological functions and implications in pathology.
Download or read book Growth Hormone in Adults written by Anders Juul and published by Cambridge University Press. This book was released on 2000-04-27 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: This revised new edition reviews the substantial advances in our understanding of the vital role of growth hormone (GH) in maintaining adult health, and the resulting disorders from GH deficiency. The first edition, published in 1996, provided a pioneering overview of the subject; this new edition provides an even more comprehensive account, fully updated with the latest research, clinical applications, and references. The therapeutic benefits of GH treatment in GH deficiency are thoroughly evaluated, including effects on metabolism, cardiac function, exercise performance, psychosocial aspects, and aging and gender-specific effects. This compilation by the world's leading experts covers clinical investigation, diagnosis and treatment issues, and encompasses new knowledge of the control and action of GH secretion. This volume is the most authoritative, comprehensive, and detailed account available and will be an essential source of reference for all endocrinologists.
Download or read book Growth Hormone and Insulin like Growth Factor I in Human and Experimental Diabetes written by Allan Flyvbjerg and published by . This book was released on 1993-04-27 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current research indicates that growth factors play a role in the physiological, metabolic, functional and structural changes seen in diabetes. This book combines the latest evidence regarding the effects of growth hormone and insulin-like growth factors in relation to metabolism in this disorder and the development of complications.
Download or read book Insulin Like Growth Factors in Development Cancers and Aging written by Haim Werner and published by MDPI. This book was released on 2021-08-30 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Issue of Cells on “Insulin-Like Growth Factors in Development, Cancers and Aging” provides a collection of modern articles dealing with the role of insulin-like growth factors (IGF1) in cancer biology, aging and development. Featured articles explore basic and clinical aspects of the IGF1 system, including post-genomic analyses as well as novel approaches to target the IGF1 receptor (IGF1R) in oncology.
Download or read book Molecular and Cellular Biology of Insulin like Growth Factors and Their Receptors written by Derek Leroith and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: An essential element in the development and functional integrity of all organisms is intercellular communication. This is achieved by the secretion of soluble messenger molecules which subsequently interact with receptor-effector pathways in the responsive cells. Hormones are traditionally defined as chemical messengers synthesized by endocrine glands. Unlike hormones produced by endocrine glands, growth factors are hormone-related substances produced by many tissues and play an important role in controlling growth and development. While the exact physiological roles of growth factors have yet to be elucidated, they play important roles in the regulation of cellular proliferation and/or differentiation during ontogenesis, growth and differentiation. During recent years there has been a substantial increase in research related to peptide growth factors, their receptors, and modes of action. With the discovery and characterization of numerous growth factors, it became clear that these growth factors had multiple features in common with classic hormones as well as with oncogenes. Furthermore, there are distinct families of growth factors based either on structural or functional similarities.
Download or read book Insulin like Growth Factor Receptor Signalling written by Derek Leroith and published by Springer Science & Business Media. This book was released on 2003-07-31 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: Insulin-like growth factors are ubiquitously expressed and are crucial for growth and function of almost all cells. Together with their binding proteins and receptors, they form a widely studied biological system involving many proteins and characterized by complex interactions. In addition to its significance in growth and development, the insulin-like growth factor system also has important roles in a wide variety of pathological states. This has led to interest in the therapeutic potential of insulin-like growth factors and their binding proteins as candidate drug targets. This comprehensive book contains current information on both basic science and clinical aspects of IGFs and their regulatory proteins, with emphasis on their relevance to cancer.
Download or read book Insulin like Growth Factors written by Derek LeRoith and published by CRC Press. This book was released on 1991-05-28 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past decade, the continued interest in insulin-related growth factors has been documented by a plethora of research programs and publications focused on these growth factors. Both molecular and cellular biological techniques have improved and enabled investigators to study the properties of the growth factors in depth. This volume covers the molecular (genetic) aspects of the growth factors, their binding proteins and receptors, as well as those factors affecting their gene transcription and translation. In addition, aspects of the cellular action of these growth factors through their receptors and how this impacts normal cellular function are discussed. The book will provide valuable information for researchers in physiology, biology, endocrinology, and metabolism.
Download or read book Current Directions in Insulin Like Growth Factor Research written by Derek LeRoith and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of the insulin-like growth factor (IGF) family has become an exciting area of investigation. Initially, this family consisted of ligands (insulin, IGF-I and IGF-m and receptors (the insulin receptor, the type I or IGF-I receptor and the type II or IGF-IYM-6-P receptor). Subsequently, it was discovered that six specific binding proteips (lGFBPs 1-6) playa major role in the actions of this growth factor family. In addition, there are now more potential receptors when one considers the possible roles of the insulin-receptor related receptor (IRR) and hybrid receptor dimers composed of insulin and IGF-I receptor (half-receptors). Another important aspect of this area of research is the realization that the IGFs are not only essential for normal growth and development but, in addition play an important role in the normal specialized function(s) of all tissues of the body, including the nervous system, skeleton, reproductive system, kidney, and the immune system, to name but a few. The development of recombi!tant human IGF-I for clinical testing has been a major breakthrough for investigators. Potential uses include wound healing, reversal of catabolic states, diabetes, bone remodeling, recovery from acute renal failure and many others. will determine both its use and its potential hazards.
Download or read book Hormonal and Nutritional Regulation of Insulin like Growth Factor I and Binding Protein Expression written by Jesse Cheng-lin Chow and published by . This book was released on 1993 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Insulin like Growth Factors written by Paul N. Schofield and published by . This book was released on 1992 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past decade has seen an explosion in our understanding of the factors regulating cell proliferation and differentiation. One of the most exciting advances has been the recognition of the pivotal role of the peptide growth factors in these processes. The insulin-like growth factors, discovered in 1958 by Salmon and Daughaday, are now among the best characterized growth factors. This comprehensive work describes the recent advances in knowledge of their receptors and binding proteins together with their purification and cloning. This provides exciting insights into the role of these factors in the physiology of normal growth, embryonic development and areas of pathology such as wound healing and cancer. In this book an international group of contributors reviews the most up-to-date information on all aspects of the insulin-like growth factors, and critically discusses models for IGF action in their own systems. The book is a valuable source of information and ideas for researchers, and an accessible introduction to the subject for students and clinicians.
Download or read book Growth and Lactogenic Hormones written by L. Matera and published by Gulf Professional Publishing. This book was released on 2002-04-18 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: For more than seventy years evidence has accumulated documenting the existence of a bi-directional communication network between growth hormone and the immune system. In the past twenty years there has been a tremendous proliferation of information detailing the workings of the growth hormone and insulin-like growth factor axis. A multitude of growth factors and binding proteins have been identified. More and more evidence supporting the important role of the growth hormone IGF network in the well functioning of the normal immune system has been documented. Clearly the challenge today is not to prove, but to understand, the neuroimmune regulatory role of GLH in its entire complexity. The ultimate goal of this volume and of all the other volumes of this series is to promote the understanding of the science and to ease human suffering.
Download or read book Advances in Growth Hormone and Growth Factor Research written by Eugenio E. Müller and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Readers of this book can update their knowledge in the fast-moving field of endocrinology and neurobiology. Topics concerning growth and development are extensively reviewed from both basic science and clinical viewpoints. Aspects related to growth development and to the control of cellular differentiation and multiplication are discussed. Further new information is provided on: synthetic recombinant human growth hormone (rHGH); potential diagnostic and therapeutic applications of the neuropeptide, growth hormone releasing hormone (GHRH); the physiology and physiopathology of the neural control of growth hormone secretion; the diagnosis and therapy of growth hormone deficiency or excess states; and the biology, function and possible utilization of growth factors. These important new findings are relevant to progress in pediatrics, pediatric and clinical endocrinology, neuroendocrinology and physiology.
Download or read book Insulin like Growth Factors and Cancer written by Derek LeRoith and published by Springer Science & Business Media. This book was released on 2011-09-18 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book will detail the history, successes, and failures of targeted therapies for cancer, with a particular focus on IGF systems and cancer.
Download or read book IGF and Nutrition in Health and Disease written by M. Sue Houston and published by Springer Science & Business Media. This book was released on 2004-08-04 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: A benchmark review on how specific nutrients or adverse nutritional states impact the components of the IGF (Insulin-like Growth Factor) system and affect human health and disease. The authors describe the fundamentals of the IGF system, explain its basic mechanisms of action, illuminate its essential role in physical development across the life span, and highlight the link between normal and abnormal cellular growth resulting in tumor formation. They also fully examine the clinical aspects of nutrition and IGF, from pre- and postnatal development through old age, in the maintenance of normal metabolism, bone, and muscle health, and their role in pathological states. Special attention is given to critical illness, diabetes, gastrointestinal diseases, kidney failure, endocrine dysfunctions, cardiovascular disease, neurological disorders, and cancer, as well as to their potential for IGF therapy.
Download or read book An Investigation of the Growth Hormone insulin like Growth Factor I Axis of High Growth hg Mice written by Karlyn Grace Black and published by . This book was released on 1990 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hormonal Regulation of Growth written by Herwig Frisch and published by . This book was released on 1989 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
