ANALYSIS OF TRANSGENIC MOUSE MODELS TO STUDY MAMMALIAN SPERMATOGONIA. PDF Download
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Author: Oleksandr Kirsanov
Publisher:
ISBN:
Category :
Languages : en
Pages : 92
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Book Description
Spermatogenesis in the mammalian testis results in the daily production of millions of spermatozoa. This developmental process is founded upon the actions of a small population of spermatogonial stem cells (SSCs). As SSCs divide, their progeny must either remain an SSC to maintain the stem cell pool (self-renewal) or become an undifferentiated progenitor spermatogonium that proliferates prior to differentiating in response to retinoic acid (RA) and entering meiosis. Our laboratory is focused on understanding the mechanisms that regulate these fate decisions as well as defining the changes that occur downstream of RA that prepare spermatogonia for entry into meiosis. Currently, researchers have been unable to readily isolate pure populations of spermatogonia in the developing or adult testis. To address this, I have examined multiple transgenic mouse models to identify those with germ cell-specific expression of fluorescent reporter genes that will enable us to isolate spermatogonia using fluorescence-activated cell sorting (FACS). The results in this thesis describe these efforts, and document the identification of an excellent mouse model for future studies in our laboratory to understand the mechanisms underlying spermatogonial development. This work was supported by a grant from the NIH/NICHD (HD090083) to C.B.G.
Author: Oleksandr Kirsanov
Publisher:
ISBN:
Category :
Languages : en
Pages : 92
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Book Description
Spermatogenesis in the mammalian testis results in the daily production of millions of spermatozoa. This developmental process is founded upon the actions of a small population of spermatogonial stem cells (SSCs). As SSCs divide, their progeny must either remain an SSC to maintain the stem cell pool (self-renewal) or become an undifferentiated progenitor spermatogonium that proliferates prior to differentiating in response to retinoic acid (RA) and entering meiosis. Our laboratory is focused on understanding the mechanisms that regulate these fate decisions as well as defining the changes that occur downstream of RA that prepare spermatogonia for entry into meiosis. Currently, researchers have been unable to readily isolate pure populations of spermatogonia in the developing or adult testis. To address this, I have examined multiple transgenic mouse models to identify those with germ cell-specific expression of fluorescent reporter genes that will enable us to isolate spermatogonia using fluorescence-activated cell sorting (FACS). The results in this thesis describe these efforts, and document the identification of an excellent mouse model for future studies in our laboratory to understand the mechanisms underlying spermatogonial development. This work was supported by a grant from the NIH/NICHD (HD090083) to C.B.G.
Author: P.H. Vogt
Publisher: Karger Medical and Scientific Publishers
ISBN: 3318060984
Category : Medical
Languages : en
Pages : 190
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Book Description
Infertility affects more than one in ten couples worldwide and is related to highly heterogeneous pathologies sometimes only discernible in the germ line. Its complex etiology often, but not always, includes genetic factors besides anatomical defects, immunological interference, and environmental aspects. Nearly 30% of infertility cases are probably caused only by genetic defects. Thereby experimental animal knockout models convincingly show that infertility can be caused by single or multiple gene defects. Translating those basic research findings into clinical studies is challenging, leaving genetic causes for the vast majority of infertility patients unexplained. Nevertheless, a large number of candidate genes have been revealed by sophisticated molecular methods. This book provides a comprehensive overview on the subject of infertility written by the leading authorities in this field. It covers topics including basic biological, cytological, and molecular studies, as well as common and uncommon syndromes. It is a must-read for human geneticists, endocrinologists, epidemiologists, zoologists, and counsellors in human genetics, infertility, and assisted reproduction.
Author: Shree Ram Singh
Publisher: Humana
ISBN: 9781493945672
Category : Medical
Languages : en
Pages : 0
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Book Description
Mouse Genetics: Methods and Protocols provide selected mouse genetic techniques and their application in modeling varieties of human diseases. The chapters are mainly focused on the generation of different transgenic mice to accomplish the manipulation of genes of interest, tracing cell lineages and modeling human diseases. Composed in the highly successful Methods in Molecular Biology series format, each chapter contains a brief introduction, a list of necessary materials, systematic, readily reproducible methods and a notes section, which shares tips on troubleshooting in order to avoid known pitfalls. Comprehensive and authoritative, Mouse Genetics: Methods and Protocols promises to deliver fundamental techniques and protocols to geneticists, molecular biologists, cell and developmental biologists, students and postdoctoral fellows working in the various disciplines of mouse biology and modeling human disease.
Author: Christopher J. De Jonge
Publisher: Cambridge University Press
ISBN: 9780521853972
Category : Medical
Languages : en
Pages : 372
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Book Description
Originally published in 2006, this is a comprehensive and definitive account of the human male gamete. The volume summarizes many unique and revealing characteristics of the sperm cell. It provides a detailed overview of human sperm production, maturation and function, and looks at how these processes affect and influence fertility, infertility and ART. The volume thus provides a detailed review of the most important research and developments, augmented with pertinent references. This book will appeal to all practitioners and scientists in reproductive medicine and in particular to clinical scientists, graduate and post-graduate scientists, and laboratory personnel.
Author: Katsunori Tanaka
Publisher: John Wiley & Sons
ISBN: 3527344322
Category : Science
Languages : en
Pages : 560
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Book Description
Provides timely, comprehensive coverage of in vivo chemical reactions within live animals This handbook summarizes the interdisciplinary expertise of both chemists and biologists performing in vivo chemical reactions within live animals. By comparing and contrasting currently available chemical and biological techniques, it serves not just as a collection of the pioneering work done in animal-based studies, but also as a technical guide to help readers decide which tools are suitable and best for their experimental needs. The Handbook of In Vivo Chemistry in Mice: From Lab to Living System introduces readers to general information about live animal experiments and detection methods commonly used for these animal models. It focuses on chemistry-based techniques to develop selective in vivo targeting methodologies, as well as strategies for in vivo chemistry and drug release. Topics include: currently available mouse models; biocompatible fluorophores; radionuclides for radiodiagnosis/radiotherapy; live animal imaging techniques such as positron emission tomography (PET) imaging; magnetic resonance imaging (MRI); ultrasound imaging; hybrid imaging; biocompatible chemical reactions; ligand-directed nucleophilic substitution chemistry; biorthogonal prodrug release strategies; and various selective targeting strategies for live animals. -Completely covers current techniques of in vivo chemistry performed in live animals -Describes general information about commonly used live animal experiments and detection methods -Focuses on chemistry-based techniques to develop selective in vivo targeting methodologies, as well as strategies for in vivo chemistry and drug release -Places emphasis on material properties required for the development of appropriate compounds to be used for imaging and therapeutic purposes in preclinical applications Handbook of In Vivo Chemistry in Mice: From Lab to Living System will be of great interest to pharmaceutical chemists, life scientists, and organic chemists. It will also appeal to those working in the pharmaceutical and biotechnology industries.
Author: Larry I. Lipshultz
Publisher: Cambridge University Press
ISBN: 1139483242
Category : Medical
Languages : en
Pages : 691
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Book Description
The new edition of this canonical text on male reproductive medicine will cement the book's market-leading position. Practitioners across many specialties - including urologists, gynecologists, reproductive endocrinologists, medical endocrinologists and many in internal medicine and family practice – will see men with suboptimal fertility and reproductive problems. The book provides an excellent source of timely, well-considered information for those training in this young and rapidly evolving field. While several recent books provide targeted 'cookbooks' for those in a male reproductive laboratory, or quick reference for practising generalists, the modern, comprehensive reference providing both a background for male reproductive medicine as well as clinical practice information based on that foundation has been lacking until now. The book has been extensively revised with a particular focus on modern molecular medicine. Appropriate therapeutic interventions are highlighted throughout.
Author: Kyle E. Orwig
Publisher: Springer Science & Business Media
ISBN: 1617379735
Category : Science
Languages : en
Pages : 269
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Book Description
Scientists investigating germ cells have, over the past 15 years, originated discoveries and innovations that give us valuable insights into the mechanisms that regulate not just stem cell function, but human development in its widest sense. With contributions from some of the leading researchers in the field, Male Germline Stem Cells: Developmental and Regenerative Potential assesses the implications of these discoveries for understanding the fundamental biology of germline stem cells as well as their potential for human stem cell-based therapies. This monograph covers many of the fundamental issues now being explored by today’s generation of stem cell researchers, including the field’s potential for regenerative medicine. Ranging from an assessment of the pluripotency of primordial germ cells and their possible applications in treating testicular cancer, to the recovery of once-mordant fertilization-competent sperm, this volume has it all. It is a reference point for any scientist involved in related research as well as being a timely summation of what could prove to be a hugely exciting and very fruitful area of inquiry.
Author: Lonnie Dee Russell
Publisher:
ISBN:
Category : Sertoli cells
Languages : en
Pages : 840
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Book Description
Author: Susumu Ohno
Publisher: Springer Science & Business Media
ISBN: 3642881785
Category : Science
Languages : en
Pages : 201
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Book Description
Natural selection operates among individual organisms which differ in their genetic constitution. The degree of hereditary variability within a species is greatly enhanced by cross-fertilization. Indeed, the mechanism of sexual reproduction occurred very early in evolution, for it is seen today even in bacteria. In Escherichia coli, fertilization occurs by passage of the single chromosome from the male into the female bacterium (LEDERBERG, 1959). In multicellular organisms, the separation of germ from soma, and the production of haploid gametes became mandatory. The gametes were of two types. One, extremely mobile, was designed to seek out and penetrate the other, which loaded with nutrients, received the mobile gamete and intiated the development of a new individual. The foundation for true bisexuality was thus laid. In the primitive state of bisexuality, whether an individual is to be a sperm-producing male or an egg-producing female appears to be decided rather haphazardly. In the worm, Banelia viridis, the minute males are parasites in the female. Larvae that become attached to the proboscis of an adult female become males, while unattached larvae sink to the bottom and become females (BALTZER, 1935). The more sophisticated state of bisexuality was initiated by setting aside a particular pair of chromosomes for specialization and making either the male or the female a heterogametic sex. Sex chromosomes as we know them were thus born.
Author: Juliusz Ashot Kozak
Publisher: CRC Press
ISBN: 149875273X
Category : Science
Languages : en
Pages : 343
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Book Description
Calcium Entry Channels in Non-Excitable Cells focuses on methods of investigating the structure and function of non-voltage gated calcium channels. Each chapter presents important discoveries in calcium entry pathways, specifically dealing with the molecular identification of store-operated calcium channels which were reviewed by earlier volumes in the Methods in Signal Transduction series. Crystallographic and pharmacological approaches to the study of calcium channels of epithelial cells are also discussed. Calcium ion is a messenger in most cell types. Whereas voltage gated calcium channels have been studied extensively, the non-voltage gated calcium entry channel genes have only been identified relatively recently. The book will fill this important niche.
