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During the last two decades, progress in steroid hormone research has resulted in the development of new approaches to contraception as well as diagnosis and treatment of endocrine disorders and cancers. Although significant advances have been made in the purification, characterization, immunochemistry and molecular biology of steroid receptors, the precise molecular mechanism of steroid hormone action has remained obscure. This book captures the detailed presentations made at the first conference on Steroid Receptors in Health and Disease held at Meadow Brook Hall, Oakland University in the fall of 1987. The purpose of this international con ference was to facilitate scientific exchange toward a better understand ing of the mode of action of steroid hormones. The scientific sessions consisted of poster presentations and state-of-the-art lectures, the latter of which make up this volume. The first chapter is meant to provide the reader with a more general background of the topics covered in the book, as well as to discuss certain theme-related issues that are either not yet well-established or accepted or are in the stage of infancy. It is hoped that this volume will serve as a useful treatise for students and investigators interested in basic and clinical aspects of biological regulation by steroid hormones. A task of this magnitude could not have been undertaken without the encouragement, advice and continued generous assistance of the members of the scientific committee. I am gratefully indebted to Drs.
Steroids are essential hormones that regulate biological processes across their lifespan. Steroid hormone production and action must be tightly controlled otherwise there can be detrimental effects on physiological function leading to disease. This reprint contains original and review articles by experts at the cutting edge of their fields published in a Special Issue on the "Molecular mechanisms of steroid hormone biosynthesis and action" of the International Journal of Molecular Sciences. The topics include: 1) Steroid hormone biosynthesis, including substrate availability, mechanism of steroidogenic enzyme action, and the impact of mutations; 2) Molecular and cellular regulation of steroidogenesis, including steroidogenic cell response to hormone stimulation, signaling pathways, kinases, transcription factors, and gene expression; 3) Molecular mechanisms of endocrine disruptor action on steroidogenic cells; and 4) New tools and approaches to detect and study steroid hormones.
Within the last two decades endocrinological research has taken a definite tum toward biochemistry and molecular biology. This has resulted in a new discipline called' 'molecular endocrinology. " Studies on the mechanism of hormone action have continued to make headlines with fundamental discov eries in receptor action and gene regulation. Recently the insect endocrino logists have also begun to explore the molecular mechanism of steroid hor mone action taking advantage of the vast number of Drosophila mutants, the library of Drosophila gene, and several well-characterized cell-lines. The availability ofthe recombinant DNA technology has provided a truly revolu tionary tool in the hands of the molecular endocrinologists. "Gene Regula tion by Steroid Hormones" is compiled and presented in this frontier spirit, and we hope that this volume will serve not only the active investigators in the field but will also be very useful to students and researchers with a gen eral interest in regulatory biology. The book is an offshoot of the Conference on Molecular Mechanism of Steroid Hormone Action held at the Meadow Brook Mansion of Oakland University in the fall of 1978. We wish to acknowledge the financial assist ance from the National Science Foundation and Oakland University. The conferees will never forget the warmest hospitality of Dr. LOWELL EKLUND and his staff at the Meadow Brook center and we also wish to express per sonal gratitude to many of our students and colleagues for helping us to make the conference a great success.
"As well as being important physiologically, steroid-responsive systems have been widely used as models for studying eukaryotic gene structure, action, and regulation. This volume is a comprehensive description of the molecular mechanisms by which steroid hormones regulate the expression of specific target genes. Topics covered in detail include the structure of steroid receptors, transcriptional activation and repression, steroid binding proteins, and steroidogenesis." "Steroid Hormone Action is an up-to-date text, written by international experts, which brings together the most important recent advances in this field. It is a superb guide for molecular biologists, pharmacologists, and clinicians interested in gene regulation, hormones and steroid antagonists, and endocrine-related disorders."--BOOK JACKET.Title Summary field provided by Blackwell North America, Inc. All Rights Reserved
Receptors and Gene Expression It is now more than three years since the last Meadow Brook Conference on Hormones, and a great deal has happened in the meantime. We have become comfortable with the totally unanticipated fact that the coding sequences of genes are in discontinuous arrangements and that the RNA transcribed from them must be extensively processed to form messenger RNA. We have also learned about the strategy of "mixing and matching" of genetic segments so that a small amount of DNA can go a long way in producing a huge variety of different proteins, as in the immunoglobulin system. The explosive effort directed toward DNA sequence analysis has led us to the conclusion that there are signals within the DNA that specify sites of transcription initiation and possibly sites for interacting with regulatory molecules such as hor mones and their receptors. The current intense interest in the structure of chromatin beyond the nucleosome-that is, the superstructural characteris tics of the genetic material-is finally yielding meaningful results that give promise for understanding the regulation of gene activity. ROBERT F. GOLDBERGER Preface Research on the molecular mechanism of steroid hormone action continues at an extraordinary pace and a great deal of progress has been made. Steroid hormones have been localized on target genes providing the long awaited evidence for the concept of a direct effect of the steroid-receptor complex on gene regulation. Purified steroid receptors have been dissected to identify different functional domains.
Recent years have seen tremendous progress in the field of hormone action and consequent signal transduction. The 40th Colloquium Mosbach was devoted to the discussion of results concerning the molecular process of hormone action, especially the processes following hormone binding to the corresponding receptors. Structural and functional aspects of steroid hormone receptors as well as ion-channel-coupled and enzyme-linked receptors were treated in detail. Particular interest focussed on the latest results concerning transcriptional control, protein phosphorylation, the role of G-Proteins, oncogene proteins, involvement of phospholipases and the regulation of ion channels.