Embryos, Genes and Birth Defects

In the Western world, birth defects constitute the greatest single cause of infant mortality and a significant cause of infant morbidity, with a major impact on healthcare services and the affected families. Birth defects are the consequence of defective embryonic development that can be due to genetic, epigenetic or teratogenic factors.
The first edition of Embryos, Genes and Birth Defects, edited by the late Peter Thorogood, was a radical new book aimed at bridging the gap between the medical disciplines of embryology and dysmorphology, and recent advances in cellular, molecular and developmental biology. This new edition remains unique in its breadth and brings up to date our understanding of birth defects and of the strategies utilized to gain such knowledge. It features new chapters on human cytogenetics, mutagenesis and the yes and ears.
The book present key topics in developmental biology and explains how they provide the foundations of an understanding of clinical birth defects. The first six chapters introduce concepts and strategies adopted to elucidate developmental anomalies leading to birth defects. The book then focuses on specific organs and reviews the cellular and molecular mechanisms affecting their development and how disruption of these mechanisms by genetic or environmental factors may underlie certain birth defects. The chapters are concise and provide an up to date coverage of topics in a format that is easily accessible and yet at the forefront of research.
Written primarily for paediatricians, obstetricians, clinical geneticists and allied workers, this book guides the reader through the contribution of modern molecular biology to our understanding of human development. Developmental and cellular biologists will learn how errors in cellular and genetic mechanisms can lead to classical disorders, diseases and syndromes.

Spis treści:
Preface to the First Edition.
Preface to the Second Edition.
Contributors.
                                                                                                                                                                                                                                                                                                                                           ;                                                                                                                                                                                                                 1.1. 1. The Relationship between Genotype and Phenotype: Some Basic Concepts (Philip Stanier and Gudrun Moore).
Introduction.
The relationship between genotype and phenotype.
The role of ‘model systems’.
The changing concept of homology.
2. Uses of Databases in Dysmorphology (Michael Baraitser).
What is a syndrome?.
Some of these problems are addressed by dysmorphology databases.
Where databases do not help.
Dysmorphology databases.
How databases work.
3. Human Cytogenetics  (J. D. A. Delhanty).
Introduction.
Population cytogenetics.
Structural anomalies.
The genesis of chromosome abnormalities.
Embryo survival.
The cause of high levels of chromosome abnormality in human embryos.
Relative parental risks – age, translocations, inversions, gonadal and germinal mosaics.
4. Identification and Analysis of Genes Involved in Congenital Malformation Syndromes (Peter J. Scambler).
Gene identification.
Biological analysis of genes implicated in birth defect syndromes.
Animal models.
Why study rare human birth defect syndromes?.
5. Transgenic Technology and Its Role in Understanding Normal and Abnormal Mammalian Development (Valerie Vidal and Andreas Schedl).
Introduction.
Transgenic mice.
Genetic manipulation using gene targeting in ES cells.
Outlook and future developments.
6. Chemical Teratogens: Hazards, Tools and Clues (Nigel A. Brown) (with revisions by Cheryll Tickle).
Introduction.
Teratogens and human malformations.
General strategy in chemical teratogenesis.
Valproic acid.
Gene–teratogen interaction.
Teratogens and phenocopies.
Teratogens as manipulative tools.
Teratogens as clues.
Final comments.
7. The Limbs (Patrizia Ferretti and Cheryll Tickle).
Developmental anatomy of the human limb.
Main classes of limb defects.
Contemporary studies on mechanisms of limb development.
Limb regeneration.
How, when and where experimental studies elucidate abnormal development.
Agenda for the future.
8. Brain and Spinal Cord Andrew J. Copp.
Introduction.
Overview of nervous system development.
Defects of CNS development: towards a genetic and developmental understanding.
Agenda for the future.
9. Birth Defects Affecting the Eye (Jane C. Sowden).
The eye.
Development of the eye.
Congenital eye defects and paediatric blindness.
Gene mutations underlying congenital eye defects.
Cellular and molecular mechanisms affecting eye development and how they elucidate the causes of abnormal developme