Structure/Function Analysis of the Amino-Terminal Domain of the Androgen Receptor


Book Description

"This is a Ph.D. dissertation. The amino-terminal domain (NTD) of the androgen receptor (AR) is indispensable for AR transactivation and contains a strong activation function 1. Its activity is affected by coregulators that influence a number of functional properties of AR. The NTD of the AR is 529 aa long and is a complex domain with several functions, namely p160 recruitment, interaction with the LBD, and it contains two transactivation functions Tau-1 And Tau-5. The aim of this study was to obtain a more detailed structure-function analysis of the NTD of the AR. Contents include: Introduction, N/C Interaction in AR-mediated Transactivation, Polyglutamine Stretch, SUMOylation of the AR, Activation Function of the hAR, Discussion, Summary and conclusions, Future Prospects."













Nuclear Hormone Receptors


Book Description

An overview of the supergene family made up of those nuclear hormone receptors which recognize thyroid and steroid hormones, vitamen D and retinoic acid and which are characterized by their ability to bind both ligands and the genes which respond to them.







Androgen Action


Book Description

Androgens play a critical role in the development and maintenance of the male reproductive system and affect important physiological processes and pathological conditions, including the homeostasis of the normal prostate and prostate cancer. Androgen Action: Methods and Protocols is designed to provide a tool box to study various phases of androgen action, from its entry to the cell to the phenotypic response that the cell mounts, with up-to-date techniques for biochemists, molecular biologists, cell biologists, geneticists, and pathologists. The volume opens with a brief review of the research history on androgen action and prostate carcinogenesis, followed by chapters that cover state-of-the-art methods to determine androgen levels in biological tissues and fluids, experimental procedures to study the various aspects of androgen receptor activity, and methodology to study salient examples of interactions between androgen signalling and other major signalling pathways in cells. Written in the successful Methods in Molecular BiologyTM series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible protocols, and notes on troubleshooting and avoiding known pitfalls. Authoritative and easily accessible, Androgen Action: Methods and Protocols provides a comprehensive overview of, and practical guidance on, the diverse methodologies that are propelling androgen action research forward, both for normal physiology as well as in disease states.




Structure-function Analysis of Three Widely Dispersed Point Mutations in the Hormone-binding Domain of the Androgen Receptor


Book Description

"Three point mutations have been found in the hormone-binding domain (HBD) of the human androgen receptor (hAR): one in the N-terminal end (Ile663Asn in a family with partial androgen insensitivity syndrome (PAIS)); one in the middle, (Leu820Val in a family with PAIS); and one in the C-terminal end (Pro903Ser, in a family with complete AIS). The positions 663 and 903 were the most terminal mutation sites in the HBD found to date. The three mutant hARs have been previously characterized biochemically in genital skin fibroblasts. In the family with the Leu820Val substitution, the mother and the grandmother were found to be carriers for the same mutation. To prove their pathogenicity, each of the three mutations has been reproduced in an hAR expression vector that was transfected into COS-1 cells. In COS-1 cells, the complexes from Pro903Ser and Leu820Val had: increased thermolability; increased dissociation rates; decreased affinity; and abnormal transactivation. There was a hierarchy in the severity of the mutations expressed in kinetic and transactivation assays that correlated with the severity of the clinical phenotype. The pathogenicity of the Pro903Ser and the Leu820Val mutations was thereby confirmed. In COS-1 cells, the AR with Ile663Asn had normal thermolability, normal dissociation rates, and normal transactivation, but a decreased affinity. Although this sequence alteration has only been found in a PAIS patient, its pathogenicity is not considered to be proven. More sensitive assays are needed for this purpose." --




Endocrinology of the Testis and Male Reproduction


Book Description

This book provides a comprehensive overview of endocrinology of the male reproductive system, explaining how it works and how, sometimes, it fails to work. World-class specialists present state of the art knowledge on all aspects, including anatomy, physiology, molecular biology, genetics, pathophysiology, clinical manifestations of testicular diseases, endocrine aspects of andrological and sexual diseases, and therapy. Extensive consideration is given to sexual development, testicular function, the clinical approach to disorders of male reproduction, male hypogonadism, sexual dysfunction, and male infertility. In addition, sociodemographic, psychological, and ethical aspects of male reproductive disorders are discussed. The book is intended as a major reference for endocrinologists, andrologists, and sexologists, as well as basic and clinical scientists. It is published as part of the SpringerReference program, which delivers access to living editions constantly updated through a dynamic peer-review publishing process.




Encyclopedia of Cancer


Book Description

This comprehensive encyclopedic reference provides rapid access to focused information on topics of cancer research for clinicians, research scientists and advanced students. Given the overwhelming success of the first edition, which appeared in 2001, and fast development in the different fields of cancer research, it has been decided to publish a second fully revised and expanded edition. With an A-Z format of over 7,000 entries, more than 1,000 contributing authors provide a complete reference to cancer. The merging of different basic and clinical scientific disciplines towards the common goal of fighting cancer makes such a comprehensive reference source all the more timely.