Environmental Development of the External Genitalia

Environmental Development of the External Genitalia
Author: Ciro Maurizio Amato
Publisher:
Total Pages: 151
Release: 2018
Genre:
ISBN:

Hypospadias is one of the most common birth defects in the world. The incidence of hypospadias has nearly doubled over the past 50 years and now occurs on average in 1 in 125 male newborns each year. Hypospadias is a malformation of the penis where the urethra does not exit at the distal tip, but rather ventrally along the shaft of the penis. The severity of hypospadias depends on the amount of preputial swelling closure, the urethral exit, and the overall shape of the penis. The presence of anti-androgenic and estrogenic endocrine disrupting chemicals (EDCs) in the environment is strongly linked with hypospadias incidence and severity. Still very little is known about the basic biology of penis development, how EDCs perturb normal development, and in-turn there are no known prenatal preventative treatments to protect the developing fetus from EDC exposure and abnormal penis development. In this dissertation I first review the basic biology of penis development. Then using geometric morphometrics I investigate the impact of the anti-androgen, vinclozolin, on morphological changes in the external genitalia. Based on where EDCs impacted penis development the most I then developed a quantitative scoring system to efficiently analyze variation in penis development. The scoring system then was implemented to investigate the temporal and endocrinological drivers of hypospadias severity. Lastly, I used the basic biological information gained to investigate a potential prenatal preventative to protect the developing fetus from EDCs.

Exploring the Biological Contributions to Human Health

Exploring the Biological Contributions to Human Health
Author: Institute of Medicine
Publisher: National Academies Press
Total Pages: 287
Release: 2001-07-02
Genre: Medical
ISBN: 0309132975

It's obvious why only men develop prostate cancer and why only women get ovarian cancer. But it is not obvious why women are more likely to recover language ability after a stroke than men or why women are more apt to develop autoimmune diseases such as lupus. Sex differences in health throughout the lifespan have been documented. Exploring the Biological Contributions to Human Health begins to snap the pieces of the puzzle into place so that this knowledge can be used to improve health for both sexes. From behavior and cognition to metabolism and response to chemicals and infectious organisms, this book explores the health impact of sex (being male or female, according to reproductive organs and chromosomes) and gender (one's sense of self as male or female in society). Exploring the Biological Contributions to Human Health discusses basic biochemical differences in the cells of males and females and health variability between the sexes from conception throughout life. The book identifies key research needs and opportunities and addresses barriers to research. Exploring the Biological Contributions to Human Health will be important to health policy makers, basic, applied, and clinical researchers, educators, providers, and journalists-while being very accessible to interested lay readers.

Hormonally Active Agents in the Environment

Hormonally Active Agents in the Environment
Author: National Research Council
Publisher: National Academies Press
Total Pages: 453
Release: 2000-02-03
Genre: Science
ISBN: 0309064198

Some investigators have hypothesized that estrogens and other hormonally active agents found in the environment might be involved in breast cancer increases and sperm count declines in humans as well as deformities and reproductive problems seen in wildlife. This book looks in detail at the science behind the ominous prospect of "estrogen mimics" threatening health and well-being, from the level of ecosystems and populations to individual people and animals. The committee identifies research needs and offers specific recommendations to decision-makers. This authoritative volume: Critically evaluates the literature on hormonally active agents in the environment and identifies known and suspected toxicologic mechanisms and effects of fish, wildlife, and humans. Examines whether and how exposure to hormonally active agents occursâ€"in diet, in pharmaceuticals, from industrial releases into the environmentâ€"and why the debate centers on estrogens. Identifies significant uncertainties, limitations of knowledge, and weaknesses in the scientific literature. The book presents a wealth of information and investigates a wide range of examples across the spectrum of life that might be related to these agents.

Environmental Impacts on Reproductive Health and Fertility

Environmental Impacts on Reproductive Health and Fertility
Author: Tracey J. Woodruff
Publisher: Cambridge University Press
Total Pages: 262
Release: 2010-01-28
Genre: Medical
ISBN: 9780521519526

Many reproductive and developmental health problems are caused by exposure to chemicals that are widely dispersed in our environment. These problems include infertility, miscarriage, poor pregnancy outcomes, abnormal fetal development, early puberty, endometriosis, and diseases and cancers of reproductive organs. The compelling nature of the collective science has resulted in recognition of a new field of environmental reproductive health. Focusing on exposures to environmental contaminants, particularly during critical periods in development and their potential effects on all aspects of future reproductive life-course, this book provides the first comprehensive source of information bringing together the arguments that are spread out among various scientific disciplines in environmental health, clinical and public health fields. It provides a review of the science in key areas of the relationship between environmental contaminants and reproductive health outcomes, and recommendations on efforts toward prevention in clinical care and public policy.

Environmental Impacts on Reproductive Health and Fertility

Environmental Impacts on Reproductive Health and Fertility
Author: Tracey J. Woodruff
Publisher: Cambridge University Press
Total Pages: 263
Release: 2010-01-28
Genre: Medical
ISBN: 1139484842

Many reproductive and developmental health problems are caused by exposure to chemicals that are widely dispersed in our environment. These problems include infertility, miscarriage, poor pregnancy outcomes, abnormal fetal development, early puberty, endometriosis, and diseases and cancers of reproductive organs. The compelling nature of the collective science has resulted in recognition of a new field of environmental reproductive health. Focusing on exposures to environmental contaminants, particularly during critical periods in development and their potential effects on all aspects of future reproductive life-course, this book provides the first comprehensive source of information bringing together the arguments that are spread out among various scientific disciplines in environmental health, clinical and public health fields. It provides a review of the science in key areas of the relationship between environmental contaminants and reproductive health outcomes, and recommendations on efforts toward prevention in clinical care and public policy.

Genetic Steroid Disorders

Genetic Steroid Disorders
Author: Maria I. New
Publisher: Academic Press
Total Pages: 470
Release: 2023-06-14
Genre: Science
ISBN: 0128214252

Genetic Steroid Disorders, Second Edition targets adult and pediatric endocrinologists, clinical geneticists, genetic counselors, reproductive endocrinologists, neonatologists, urologists, and psychoendocrinologists. It is designed to assist these specialists in the diagnosis and treatment of steroid disorders. This revision includes a new chapter on "Gonadotropins, Obesity and Bone" and new research on non-invasive prenatal diagnosis with cell-free DNA. Chapters are thoroughly updated covering steroid disorders, the genetic bases for the disorder and case presentations, This definitive reference belongs in every medical library! Presents a comprehensive, translational look at all aspects of genetic steroid disorders in one reference work Provides a common language for endocrinologists, geneticists, molecular pathologists, and genetic counselors to discuss and diagnose genetic steroid disorders Saves clinicians and researchers time in quickly accessing the very latest details on genetic tests and diagnoses as opposed to searching through thousands of journal articles Highlights significant discoveries with clinical relevance, presenting insight into which medications to use based on the genetic makeup of a patient Teaches the best strategies and most effective use of genetic information in the patient counseling setting

Infertility in the Male

Infertility in the Male
Author: Larry I. Lipshultz
Publisher: Cambridge University Press
Total Pages: 691
Release: 2009-09-24
Genre: Medical
ISBN: 1139483242

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.

Endocrine Disruptors in the Environment

Endocrine Disruptors in the Environment
Author: Sushil K. Khetan
Publisher: John Wiley & Sons
Total Pages: 410
Release: 2014-06-23
Genre: Technology & Engineering
ISBN: 1118852931

Endocrine Disruptors in the Environment A concise and engaging overview of endocrine disruption phenomena that brings complex concepts within the reach of non-specialists For most of the last decade, the science of endocrine disruption has evolved with more definitive evidence of its damaging potential to health and environment. This book lists the major environmental chemicals of concern and their mechanism of endocrine disruption including remedial measures for them. Divided into three parts, Endocrine Disruptors in the Environment begins with an overview of the endocrine system and endocrine disruptors, discussing their salient features and presenting a historical perspective of endocrine disruption phenomena. It then goes on to cover hormone- signaling mechanisms, followed by various broad classes of putative endocrine disruptors, before introducing readers to environmental epigenetic modifications. Part two of the book focuses on removal processes of various EDCs by biotic and abiotic transformation/degradation. The last section consists of four chapters embracing themes on finding solutions to environmental EDCs—including their detection, regulation, replacement, and remediation. Endocrine Disruptors in the Environment is the first book to detail the endocrine effects of several known environmental contaminants and their mechanism of endocrine disruption. Additionally, it: Covers both the chemistry and biology of endocrine disruption and compiles almost all the known endocrine disrupting environmental chemicals and their mechanisms of toxicity Addresses policy and regulatory issues relevant to EDCs including scientific uncertainty and precautionary policy Brings forth the use of Green Chemistry principles in avoiding endocrine disruption in the designing and screening for safer chemicals and remediation of the EDCs in aquatic environment Includes a useful glossary of technical terms, a list of acronyms, topical references, and a subject index Endocrine Disruptors in the Environment is an ideal book for environmental chemists and endocrine toxicologists, developmental biologists, endocrinologists, epidemiologists, environmental health scientists and advocates, and regulatory officials tasked with risk assessment in environment and health areas.

Reproductive and Developmental Toxicology

Reproductive and Developmental Toxicology
Author: Ramesh C. Gupta
Publisher: Academic Press
Total Pages: 1460
Release: 2017-03-24
Genre: Medical
ISBN: 0128042400

Reproductive and Developmental Toxicology, Second Edition, is a comprehensive and authoritative resource that provides the latest literature on this complex subject with a primary focus on three core components—parent, placenta, and fetus—and the continuous changes that occur in each. Enriched with relevant references describing every aspect of reproductive toxicology, this revised and updated resource addresses the totality of the subject, discussing a broad range of topics, including nanoparticles and radiation, gases and solvents, smoking, alcohol and drug abuse, and metals, amongst others. With a special focus on placental toxicity, this book is the only available reference to connect the three key risk stages, also including discussions on reproductive and developmental toxicity in domestic animals, fish, and wildlife. Completely revised and updated to include the most recent developments in the field, the book is an essential resource for advanced students and researchers in toxicology, as well as biologists, pharmacologists, and teratologists from academia, industry, and regulatory agencies. Provides a complete, up-to-date, integrated source of information on the key risk stages during reproduction and development Includes new chapters covering significant developments, such as dose-response assessment for developmental toxicity, juvenile toxicity, and neural tube defects, as well as emerging science, such as stem cell application, toxicoproteomics, metabolomics, endocrine disruption, surveillance and regulatory considerations, and risk assessment Offers diverse and unique in vitro and in vivo toxicity models for reproductive and developmental toxicity testing in a user-friendly format that assists in comparative analysis