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Current knowledge concerning both morphological and functional cryptorchid-related alterations in the various testicular compartments is summarized in this valuable new publication. Damage to the germinal epithelium and resulting infertility in both humans and experimental animals as well as the degree of damage to the different stages of germ cell development is discussed. In addition, information concerning hormonal therapy and orchidopexy to reverse cryptorchid-related damage is provided. Morphological alterations in Sertoli and Leydig cells is discussed in terms of cellular hypertrophy and hyperplasia, alterations in organelle number and characteristics as well as changes in cell-cell junctional complexes. Changes in Sertoli cell and Leydig cell function, including gonadotropin binding, steroidogenesis and other metabolic alterations is also outlined,as well as the influence of altered testicular function on subsequent hypothalamic-pituitary changes. Vascular disruption, the potential role of paracrine substances and direct thermal damage, all of which may be responsible for the resulting detrimental changes in one or more testicular compartments, are considered.
The Testis, Volume II: Biochemistry focuses on the study of the biochemistry of mammalian testis. Composed of contributions of authors, the book starts with the endocrinology of the testis. Topics covered include testicular estrogens and androgens; the effect of age on testicular steroidogenesis; and endocrine regulation of spermatogenesis. The compilation also presents a histochemical analysis of the localization of testicular enzymes. Covered are histochemistry; enzymes of the fetal and mature testis; and the factors affecting testicular enzymes. The text notes as well that blood flow, hormones, nutrition, age, and temperature can affect testicular lipids and that the testis has testicular proteins and nucleic acids. The selection also outlines the growth and development of mammalian testis, and then ends with the discussions on hormonal regulation; chemical constituents; and testicular development, structure, and spermatogenesis of invertebrate testes. The compilation will best serve the interest of readers interested in studying the structure and functions of the testis.
Maintaining the original goal of the first edition to integrate the basic science of endocrinology with its physiological and clinical principles, this new edition succinctly summarizes in 450 pages the latest findings on hormone secretion and hormone action, as well as all the most recent insights into the physiology and pathophysiology of hormonal disorders. Coverage extends across the entire spectrum of endocrinology-from mammalian cells, plants, and insects to animal models and human diseases-with much increased coverage of diabetes and metabolism. Highlights include cutting-edge discussions of appetite disorders, obesity, reproductive failure, control of thyroid function, hormone action in man and the lower species, and the mechanisms subserving hormone secretion.
This book provides a state of the art overview of all aspects of testicular descent and cryptorchidism, including the mechanisms of descent and the causes, consequences, diagnosis, and treatment of undescended testis. The advances in understanding that have been achieved over the past two decades are clearly explained, covering the latest genetic information on the causes of normal and abnormal testicular descent, the role of INSL3 in transabdominal migration, and the evidence that a neurotransmitter released from the genitofemoral nerve mediates androgenic control of inguinoscrotal descent. Exciting changes in the management of both congenital and acquired cryptorchidism, such as the widesp...
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Atlas on the Human Testis: Normal Morphology and Pathology presents histological illustrative material from paraffin and semi-thin sections of the human testis which are routinely used in the assessment of testicular morphology, allowing an early detection of carcinoma in situ and more advanced pathological changes of the testicular parenchyma. The early detection of cancer in situ is based on the careful morphological investigation of the biopsy and immunohistochemistry (IHC). Therefore, this atlas contains detailed descriptions of IHC methods as well as modern molecular biological methods such as DNA microarrays and proteomics and advanced microscopy techniques related to the testicular biopsy. Adequate evaluation of the testicular biopsy leads to high cure rates of testicular neoplasms which can be used as a basis to successfully treat infertility in men. Atlas on the Human Testis: Normal Morphology and Pathology is a valuable reference tool which will appeal to andrologists, urologists, pathologists, clinical embryologists, as well as reproductive biology scientists.
This volume contains the proceedings of the XVth North American Testis Workshop, held in Louisville, Kentucky, April 7 to 10, 1999, to describe current advances in testis biology. The first two chapters provide a useful historical perspective of testis physiology and formulate compelling research questions about important aspects of sperm formation and function. This prologue sets the scene for the remainder of the volume that follows a logical progression, as the title implies, from stem cell to cell function, but that is necessarily preceded by sex determination, the quintessential requirement for there being a testis in the first place. The program for this XVth Testis Workshop evolved fr...