Results and Problems in Cell Differentiation – serie

This book highlights the potential advantages of using marine invertebrates like tunicates, echinoderms, sponges and cephalopods as models in both biological and medical research. Bioactive compounds found in marine organisms possess antibacterial, antifungal, anti-diabetic and anti-inflammatory properties, and can affect the immune and nervous systems. Despite substantial research on the medicinal attributes of various marine invertebrates, they are still very much underrepresented in scientific literature: the majority of cell, developmental and evolutionary scientific journals only publish research conducted on a few well-known model systems like Drosophila melanogaster or Xenopus laevis. Addressing that gap, this book introduces readers to new model organisms like starfish or nemertera. By showing their benefits with regard to regeneration, stem cell research and Evo-Devo, the authors provide a cross-sectional view encompassing various disciplines ofbiological research. As such, this book will not only appeal to scientists currently working on marine organisms, but will also inspire future generations to pursue research of their own.

This book summarizes early pioneering achievements in the field of human neural stem cell (hNSC) research and combines them with the latest advances in stem cell technology, including reprogramming and gene editing. The powerful potential of hNSC to generate and repair the developing and adult CNS has been confirmed by numerous experimental in vitro and in vivo studies. The book presents methods for hNSC derivation and discusses the mechanisms underlying NSC in vitro fate decisions and their in vivo therapeutic mode of action.The long-standing dogma that the human central nervous system (CNS) lacks the ability to regenerate was refuted at the end of the 20th century, when evidence of the presence of neurogenic zones in the adult human brain was found. These neurogenic zones are home to human neural stem cells (hNSCs), which are capable of self-renewing and differentiating into neurons, astrocytes and oligodendrocytes. NSCs isolated from human CNS have a number of clinical advantages, especially the innate potential to differentiate into functional neural cells. Nevertheless, their full clinical exploitation has been hindered by limited access to the tissue and low expansion potential. The search for an alternative to CNS sources of autologous, therapeutically competent hNSCs was the driving force for the many studies proving the in vitro plasticity of different somatic stem cells to generate NSCs and their functional progeny. Now the era of induced pluripotent stem cells has opened entirely new opportunities to achieve research and therapeutic goals with the aid of hNSCs.

This volume takes a closer look how the cell organelles Golgi apparatus (also known as the Golgi complex or Golgi body), and centriole are structurally and functionally intertwined.Initially, it was believed that the role of Golgi complex is limited to the packaging and preparation for secretion of various cellular proteins, while the centriole participates in cell division and cilia formation. However, since their discovery nearly 200 years ago, it became clear that these two organelles are interacting, and that their functions are much more complex and far reaching than previously thought. Recent findings indicate that the Golgi–Centriole relationship may be important for directional protein transport, cell polarization and cell cycle progression. Current studies indicate that Golgi and centriole also participate in development and act as cellular and immunological sensors, and that their abnormalities lead to cell and developmental abnormalities, Alzheimer, cancer, variouslipid disorders and neurological and immunological diseases in humans. This volume combines the latest information on the structure, molecular composition, and roles of Golgi and centriole in various cellular functions and diseases. The better understanding of the Golgi–centriole interactions may lead to the development of novel therapies for the treatment of various diseases, including cancer.

This volume takes a closer look how the cell organelles Golgi apparatus (also known as the Golgi complex or Golgi body), and centriole are structurally and functionally intertwined.Initially, it was believed that the role of Golgi complex is limited to the packaging and preparation for secretion of various cellular proteins, while the centriole participates in cell division and cilia formation. However, since their discovery nearly 200 years ago, it became clear that these two organelles are interacting, and that their functions are much more complex and far reaching than previously thought. Recent findings indicate that the Golgi–Centriole relationship may be important for directional protein transport, cell polarization and cell cycle progression. Current studies indicate that Golgi and centriole also participate in development and act as cellular and immunological sensors, and that their abnormalities lead to cell and developmental abnormalities, Alzheimer, cancer, variouslipid disorders and neurological and immunological diseases in humans. This volume combines the latest information on the structure, molecular composition, and roles of Golgi and centriole in various cellular functions and diseases. The better understanding of the Golgi–centriole interactions may lead to the development of novel therapies for the treatment of various diseases, including cancer.

Evolutionary developmental biology or evo-devo is a field of biological research that compares the underlying mechanisms of developmental processes in different organisms to infer the ancestral condition of these processes and elucidate how they have evolved. It addresses questions about the developmental bases of evolutionary changes and evolution of developmental processes. The book’s content is divided into three parts, the first of which discusses the theoretical background of evo-devo. The second part highlights new and emerging model organisms in the evo-devo field, while the third and last part explores the evo-devo approach in a broad comparative context. To the best of our knowledge, no other book combines these three evo-devo aspects: theoretical considerations, a comprehensive list of emerging model species, and comparative analyses of developmental processes. Given its scope, the book will offer readers a new perspective on the natural diversity ofprocesses at work in cells and during the development of various animal groups, and expand the horizons of seasoned and young researchers alike.

Evolutionary developmental biology or evo-devo is a field of biological research that compares the underlying mechanisms of developmental processes in different organisms to infer the ancestral condition of these processes and elucidate how they have evolved. It addresses questions about the developmental bases of evolutionary changes and evolution of developmental processes. The book’s content is divided into three parts, the first of which discusses the theoretical background of evo-devo. The second part highlights new and emerging model organisms in the evo-devo field, while the third and last part explores the evo-devo approach in a broad comparative context. To the best of our knowledge, no other book combines these three evo-devo aspects: theoretical considerations, a comprehensive list of emerging model species, and comparative analyses of developmental processes. Given its scope, the book will offer readers a new perspective on the natural diversity ofprocesses at work in cells and during the development of various animal groups, and expand the horizons of seasoned and young researchers alike.

This volume presents a comprehensive overview of the latest developments in symbiosis research. It covers molecular, organellar, cellular, immunologic, genetic and evolutionary aspects of symbiotic interactions in humans and other model systems. The book also highlights new approaches to interdisciplinary research and therapeutic applications. Symbiosis refers to any mutually beneficial interaction between different organisms. The symbiotic origin of cellular organelles and the exchange of genetic material between hosts and their bacterial and viral symbionts have helped shaped the current diversity of life. Recently, symbiosis has gained a new level of recognition, due to the realization that all organisms function as a holobiome and that any kind of interference with the hosts influences their symbionts and vice versa, and can have profound consequences for the survival of both. For example, in humans, the microbiome, i.e., the entirety of all the microorganisms living in association with the intestines, oral cavity, urogenital system and skin, is partially inherited during pregnancy and influences the maturation and functioning of the human immune system, protects against pathogens and regulates metabolism. Symbionts also regulate cancer development, wound healing, tissue regeneration and stem cell function.  The medical applications of this new realization are vast and largely uncharted. The composition and robustness of human symbionts could make them a valuable diagnostic tool for predicting impending diseases, and the manipulation of symbionts could yield new strategies for the treatment of incurable diseases.

This volume presents a comprehensive overview of the latest developments in symbiosis research. It covers molecular, organellar, cellular, immunologic, genetic and evolutionary aspects of symbiotic interactions in humans and other model systems. The book also highlights new approaches to interdisciplinary research and therapeutic applications. Symbiosis refers to any mutually beneficial interaction between different organisms. The symbiotic origin of cellular organelles and the exchange of genetic material between hosts and their bacterial and viral symbionts have helped shaped the current diversity of life. Recently, symbiosis has gained a new level of recognition, due to the realization that all organisms function as a holobiome and that any kind of interference with the hosts influences their symbionts and vice versa, and can have profound consequences for the survival of both. For example, in humans, the microbiome, i.e., the entirety of all the microorganisms living in association with the intestines, oral cavity, urogenital system and skin, is partially inherited during pregnancy and influences the maturation and functioning of the human immune system, protects against pathogens and regulates metabolism. Symbionts also regulate cancer development, wound healing, tissue regeneration and stem cell function.  The medical applications of this new realization are vast and largely uncharted. The composition and robustness of human symbionts could make them a valuable diagnostic tool for predicting impending diseases, and the manipulation of symbionts could yield new strategies for the treatment of incurable diseases.

This volume reviews the latest research on the functional implications of nuclear, chromosomal and genomic organization and architecture on cell and organismal biology, and development and progression of diseases.The architecture of the cell nucleus and non-random arrangement of chromosomes, genes, and the non-membranous nuclear bodies in the three-dimensional (3D) space alters in response to the environmental, mechanical, chemical, and temporal cues. The changes in the nuclear, chromosomal, or genomic compaction and configuration modify the gene expression program and induce or inhibit epigenetic modifications. The intrinsically programmed rearrangements of the nuclear architecture are necessary for cell differentiation, the establishment of cell fate during development and maturation of tissues and organs including the immune, muscle, and nervous systems.The non-programmed changes in the nuclear architecture can lead to fragmentation of the nucleus and instability ofthe genome and thus cause cancer. Microbial and viral infections can lead to a clustering of centromeres, telomeres and ribosomal DNA and alter the properties of the nuclear membrane, allowing large immobile macromolecules to enter the nucleus.  Recent advances in next-generation sequencing technologies combined with nucleus/chromosome conformation capture, super-resolution imaging, chromosomal contact maps methods, integrative modeling, and genetic approaches, are uncovering novel features and importance of nuclear, chromosomal and genomic architecture. This book is an interesting read for cell biologists, researchers studying the structure and function of chromosomes, and anyone else who wants to get an overview of the field of nuclear, chromosomal and genomic architecture.

This volume reviews the latest research on the functional implications of nuclear, chromosomal and genomic organization and architecture on cell and organismal biology, and development and progression of diseases.The architecture of the cell nucleus and non-random arrangement of chromosomes, genes, and the non-membranous nuclear bodies in the three-dimensional (3D) space alters in response to the environmental, mechanical, chemical, and temporal cues. The changes in the nuclear, chromosomal, or genomic compaction and configuration modify the gene expression program and induce or inhibit epigenetic modifications. The intrinsically programmed rearrangements of the nuclear architecture are necessary for cell differentiation, the establishment of cell fate during development and maturation of tissues and organs including the immune, muscle, and nervous systems.The non-programmed changes in the nuclear architecture can lead to fragmentation of the nucleus and instability ofthe genome and thus cause cancer. Microbial and viral infections can lead to a clustering of centromeres, telomeres and ribosomal DNA and alter the properties of the nuclear membrane, allowing large immobile macromolecules to enter the nucleus.  Recent advances in next-generation sequencing technologies combined with nucleus/chromosome conformation capture, super-resolution imaging, chromosomal contact maps methods, integrative modeling, and genetic approaches, are uncovering novel features and importance of nuclear, chromosomal and genomic architecture. This book is an interesting read for cell biologists, researchers studying the structure and function of chromosomes, and anyone else who wants to get an overview of the field of nuclear, chromosomal and genomic architecture.

This book gives a current overview on the development, origin, structure, and functions of germline and somatic cell syncytia during embryogenesis and organogenesis. It also reviews pathogen-induced syncytia and the role of syncytial cells in cancer development.The book covers the following topics:germline syncytia, evolution, function and structure; syncytia in embryogenesis and development; the role of somatic cell fusion in fungi, specialized somatic tissues, host defense and adaptation; syncytia induced by viruses and parasites;syncytia and circulating hybrid cells in cancer and other pathological conditions; It also discusses how the genomic adaptations of microorganisms to extreme habitats can prompt the evolution of mononuclear and multinucleate/syncytial cells.The book offers a fresh outlook on syncytia's role in various processes: embryogenesis, organogenesis, adaptation, host defense, and development of specialized tissues. It highlights the importance of syncytia under physiological and pathological conditions.

This book gives a current overview on the development, origin, structure, and functions of germline and somatic cell syncytia during embryogenesis and organogenesis. It also reviews pathogen-induced syncytia and the role of syncytial cells in cancer development.The book covers the following topics:germline syncytia, evolution, function and structure; syncytia in embryogenesis and development; the role of somatic cell fusion in fungi, specialized somatic tissues, host defense and adaptation; syncytia induced by viruses and parasites;syncytia and circulating hybrid cells in cancer and other pathological conditions; It also discusses how the genomic adaptations of microorganisms to extreme habitats can prompt the evolution of mononuclear and multinucleate/syncytial cells.The book offers a fresh outlook on syncytia's role in various processes: embryogenesis, organogenesis, adaptation, host defense, and development of specialized tissues. It highlights the importance of syncytia under physiological and pathological conditions.

This book provides a comprehensive overview of the molecular basis of developmental and stem cell regulation. It revisits some of the classical models of developmental biology and puts them in context with the findings of modern stem cell research and developmental biology. Biomedical research is embarking on a new era due to new tools, which are exemplified by stem cell technologies, single-cell transcriptome analysis, and live imaging at a single-cell resolution. Publications based on cutting-edge technologies do often not provide the readers with deep biological backgrounds. This causes the risk that precious data are reduced to highly specific descriptions without sufficient biological contexts.Contemporary developmental biology on the other hand as written in many textbooks, is to a significant extent based on conceptions backdated many decades ago, and is not necessarily supported by recent findings. Yet, the prevailing classical notions tend to mislead modern biomedical researches.This book not only presents current models for developmental processes but also reinterprets and re-evaluates classic observations, thus linking classical and modern worlds of developmental biology. Spanning from molecular mechanisms to highly embryological matters it provides a bridge between these different disciplines.Written for advanced students of developmental and stem cell biology, researchers and teaching scholars, this book provides a new road map to modern developmental biology and stem cell biology.

This book provides a comprehensive overview of the molecular basis of developmental and stem cell regulation. It revisits some of the classical models of developmental biology and puts them in context with the findings of modern stem cell research and developmental biology. Biomedical research is embarking on a new era due to new tools, which are exemplified by stem cell technologies, single-cell transcriptome analysis, and live imaging at a single-cell resolution. Publications based on cutting-edge technologies do often not provide the readers with deep biological backgrounds. This causes the risk that precious data are reduced to highly specific descriptions without sufficient biological contexts.Contemporary developmental biology on the other hand as written in many textbooks, is to a significant extent based on conceptions backdated many decades ago, and is not necessarily supported by recent findings. Yet, the prevailing classical notions tend to mislead modern biomedical researches.This book not only presents current models for developmental processes but also reinterprets and re-evaluates classic observations, thus linking classical and modern worlds of developmental biology. Spanning from molecular mechanisms to highly embryological matters it provides a bridge between these different disciplines.Written for advanced students of developmental and stem cell biology, researchers and teaching scholars, this book provides a new road map to modern developmental biology and stem cell biology.

This volume covers recent developments on the role, composition, and functional significance of intercellular and interorganellar transfer. It highlights the involvement of intercellular and interorganellar transfer in cell and developmental biology, differentiation, pathogen dissemination, shaping the genetic makeup of organisms, and the development of various diseases.Animals and plants evolved different communication mechanisms and transfer of molecules and organelles between cells and between organelles within the individual cells. Tunneling nanotubes (TNTs) in animals, discovered as recently as 2004, and their functional equivalent in plants, plasmodesmata, discovered over 100 years ago, are the membranous bridges that mediate the transfer of organelles, membrane patches, vesicles, DNA/RNA, and different molecules between cells. In addition, there are other means of transfer and communication between the cells, such as cytonemes, airinames, extracellular vesicles (exosomes), and others. Variations in cytoskeletal composition, morphology, modality, and connected cells suggest that these structures play a role in development, establishment of cell fate, progenitor cell differentiation, cell reprogramming, ferroptosis, generation of cancer stem cells, and various diseases. The exchange of intact membrane patches (trogocytosis) between cells of the immune system may modify the immune response. Additionally, the transfer of genetic information between nucleus and organelles and cells of different species can shape the species and evolutionary outcome. Viral and bacterial pathogens can hijack the inter-cellular transfer routes to spread more efficiently. Cell-to-cell transfer of animal and plant pathogens can also occur by the virological synapse (VS). These specialized pathogen-induced structures share similarities and differences with neurological and immunological synapses.

This volume covers recent developments on the role, composition, and functional significance of intercellular and interorganellar transfer. It highlights the involvement of intercellular and interorganellar transfer in cell and developmental biology, differentiation, pathogen dissemination, shaping the genetic makeup of organisms, and the development of various diseases.Animals and plants evolved different communication mechanisms and transfer of molecules and organelles between cells and between organelles within the individual cells. Tunneling nanotubes (TNTs) in animals, discovered as recently as 2004, and their functional equivalent in plants, plasmodesmata, discovered over 100 years ago, are the membranous bridges that mediate the transfer of organelles, membrane patches, vesicles, DNA/RNA, and different molecules between cells. In addition, there are other means of transfer and communication between the cells, such as cytonemes, airinames, extracellular vesicles (exosomes), and others. Variations in cytoskeletal composition, morphology, modality, and connected cells suggest that these structures play a role in development, establishment of cell fate, progenitor cell differentiation, cell reprogramming, ferroptosis, generation of cancer stem cells, and various diseases. The exchange of intact membrane patches (trogocytosis) between cells of the immune system may modify the immune response. Additionally, the transfer of genetic information between nucleus and organelles and cells of different species can shape the species and evolutionary outcome. Viral and bacterial pathogens can hijack the inter-cellular transfer routes to spread more efficiently. Cell-to-cell transfer of animal and plant pathogens can also occur by the virological synapse (VS). These specialized pathogen-induced structures share similarities and differences with neurological and immunological synapses.

The study and therapeutic application of macrophages is a rapidly developing field. Tremendous progress has been made in understanding the phenotypes and functions of macrophages in healthy and diseased tissues and organs.Following the great success of Volume 62: "Macrophages - Origin, Functions and Biointervention" published in this series, this new book now focuses on the role of monocytes and macrophages in development, regeneration and disease. This new volume offers an overview of the latest developments in monocyte and macrophage subtypes and functions across various tissues including adipose tissue, bones, liver, lungs, testes, and the nervous system.The book also reviews existing and potential therapies targeted towards the macrophages and describes their homeostatic functions. It explores how macrophage cell cycle, metabolism, mitochondrial activity, histone acetylation status, and interaction with the extracellular matrix contribute to changes in macrophage phenotype and function in health and disease. Additionally, it examines the interactions between macrophages and cancer cells, bacteria, helminth parasites, and their role in the colonization and spread of HIV.For ease of reference, the volume is divided into three sections:Part I Nonimmunologic and immunologic functions of monocytes/macrophagesPart II Tissue/organ specific functions of macrophagesPart III Macrophage functions and dysfunction in diseasesThis book will be of interest to researchers working in the fields of developmental biology, immunology, cancer research, and therapeutic applications. It is written to inform and inspire experts and newcomers to the field of macrophages.

The study and therapeutic application of macrophages is a rapidly developing field. Tremendous progress has been made in understanding the phenotypes and functions of macrophages in healthy and diseased tissues and organs.Following the great success of Volume 62: "Macrophages - Origin, Functions and Biointervention" published in this series, this new book now focuses on the role of monocytes and macrophages in development, regeneration and disease. This new volume offers an overview of the latest developments in monocyte and macrophage subtypes and functions across various tissues including adipose tissue, bones, liver, lungs, testes, and the nervous system.The book also reviews existing and potential therapies targeted towards the macrophages and describes their homeostatic functions. It explores how macrophage cell cycle, metabolism, mitochondrial activity, histone acetylation status, and interaction with the extracellular matrix contribute to changes in macrophage phenotype and function in health and disease. Additionally, it examines the interactions between macrophages and cancer cells, bacteria, helminth parasites, and their role in the colonization and spread of HIV.For ease of reference, the volume is divided into three sections:Part I Nonimmunologic and immunologic functions of monocytes/macrophagesPart II Tissue/organ specific functions of macrophagesPart III Macrophage functions and dysfunction in diseasesThis book will be of interest to researchers working in the fields of developmental biology, immunology, cancer research, and therapeutic applications. It is written to inform and inspire experts and newcomers to the field of macrophages.

This volume explores various aspects of reversible acetylation of histone and non-histone proteins, focusing on their roles in development, ageing and disease progression. It examines the biological consequences of modulating acetylation levels by histone acetyltransferases (HATs) and histone deacetylases (HDACs). Covered are manipulations at multiple levels, from in vitro and in vivo studies to clinical trials and FDA-approved therapies. The book is divided in four parts:Part I provides an overview of post-translational modifications in the context of development, ageing, neurodegenerative and cancer-related diseases. It highlights the role of histone acetylation in higher genome organization and explores the functions of the proteins involved.Part II focuses on the modulation of cytoskeleton-associated proteins through reversible acetylation. It examines how acetylation influences cytoskeletal compartments, thereby regulating cellular structure and function.Part III examines acetylation in the context of development. It describes acetylation as a key regulator of early embryogenesis, influencing chromatin structure and gene expression.Part IV discusses physiological and pathological aspects of histone and non-histone protein acetylation and its modulation by activators and inhibitors.The book is a valuable resource for scientists, clinicians and academic teachers alike.

This volume explores various aspects of reversible acetylation of histone and non-histone proteins, focusing on their roles in development, ageing and disease progression. It examines the biological consequences of modulating acetylation levels by histone acetyltransferases (HATs) and histone deacetylases (HDACs). Covered are manipulations at multiple levels, from in vitro and in vivo studies to clinical trials and FDA-approved therapies. The book is divided in four parts:Part I provides an overview of post-translational modifications in the context of development, ageing, neurodegenerative and cancer-related diseases. It highlights the role of histone acetylation in higher genome organization and explores the functions of the proteins involved.Part II focuses on the modulation of cytoskeleton-associated proteins through reversible acetylation. It examines how acetylation influences cytoskeletal compartments, thereby regulating cellular structure and function.Part III examines acetylation in the context of development. It describes acetylation as a key regulator of early embryogenesis, influencing chromatin structure and gene expression.Part IV discusses physiological and pathological aspects of histone and non-histone protein acetylation and its modulation by activators and inhibitors.The book is a valuable resource for scientists, clinicians and academic teachers alike.

The field of evolutionary developmental biology (Evo-Devo) has been profoundly shaped by a handful of classical model organisms — such as Drosophila melanogaster, Caenorhabditis elegans, zebrafish, mouse, and Arabidopsis — which have provided fundamental insights into the genetic and molecular mechanisms underlying development. However, relying solely on these few models has also imposed epistemological and practical limitations, particularly when it comes to addressing the diversity of developmental processes and evolutionary trajectories found across the tree of life. As Evo-Devo matures, there is a growing recognition of the need for new model systems that better capture the breadth of evolutionary innovations, ecological contexts, and phenotypic plasticity.This volume continues to advocate the use of strategically diversified model systems as tools for filling existing gaps. It also explores the philosophical, methodological and practical considerations in the search for new model species in Evo-Devo, highlighting recent successes, ongoing challenges, and the full potential of expanding the repertoire of model species.The book offers readers a fresh perspective on developmental processes and their natural diversity among different animal groups, fostering a deeper understanding. It broadens the horizons of experienced researchers and those just starting out in the field.

Despite improvements in antirejection therapies, solid organ transplantation is hampered by chronic rejection, with around 70% of transplants being rejected within 10 years post-transplantation. Given the growing number of transplant candidates and the shortage of organ donors, finding a cure for chronic rejection is a priority in transplantation. Although chronic rejection studies have increased our knowledge of the subject over the years, the cellular and molecular processes involved in chronic rejection are still not fully understood.This volume covers the molecular and cellular aspects of the chronic rejection of both solid and composite allografts. It is divided into three parts:Part I provides a comprehensive overview and mechanistic understanding of the cellular and molecular pathways underlying chronic rejection, as well as their potential in identifying novel biomarkers and developing targeted anti-chronic rejection strategies.Part II focuses on immune cells, non-immune cells, and extracellular molecules in the context of chronic rejection.Part III concentrates on shared and organ-specific (liver, face, kidney, lung) features as well as the latest therapeutic approaches in chronic rejection.The book provides a comprehensive overview of the mechanisms and challenges involved, with the aim of inspiring the development of new therapies for chronic rejection.

This volume explores how cells and tissues sense and respond to mechanical forces, revealing their roles in health and disease, and presenting the latest models and therapeutic strategies in the field of mechanobiology.All living organisms are subject to mechanical forces, such as tension, compression, shear, torsion, bending and friction. Organisms and their components must sense and respond to these forces. Cells, cellular organelles, tissues and organs detect the physical properties of their internal and external environments, including spatial topography, substrate rigidity, compactness and porosity. After sensing these mechanical cues, they transmit the information to their structural and molecular components. These components then adjust the cell's structure, molecular composition, gene expression, signalling pathways, spatial arrangement, cell cycle, longevity, and other functions.The book looks at new developments in our understanding of these processes in various cells, describes the roles of mechanosensing and mechanotransduction in disease, and presents novel mechanosensation models and therapeutic approaches.

This volume provides in-depth reviews of model systems that exemplify the arms race in host-pathogen interactions. Somatic adaptations are responsible for the individualization of biological responses to the environment, and the continual struggle between host immune systems and invading pathogens has given rise to corresponding processes that produce molecular variation. Whether in mollusks or human beings, various host somatic mechanisms have evolved independently, providing responses to counter rapidly-changing pathogens. The pathways they utilize can include non-heritable changes involving RNA and post-translational modifications, or changes that produce somatic DNA recombination and mutation. For infectious organisms such as protozoans and flatworms, antigenic variation is central to their survival strategy. Evolving the ability to evade the host immune system not only increases their chances of survival but is also necessary for successful re-infection within the host population.

This book presents the current state of knowledge on the origin and differentiation of cell lines involved in the development of the vertebrate male and female gonads with particular emphasis on the mouse. It also discusses the processes leading to the testis- and ovary-specific structures and functions.The individual chapters review the origin and differentiation of the somatic cells of the genital ridges; the formation and migration of primordial germ cells in mouse and man; the gonadal supporting cell lineage and mammalian sex determination; differentiation of Sertoli and granulosa cells; mesonephric cell migration into the gonads and vascularization; origin and differentiation of androgen-producing cells in the gonads; germ cell commitment to the oogenic versus spermatogenic pathway and the role of retinoic acid; ovarian folliculogenesis; control of oocyte growth and development by intercellular communication within the follicular niche; biology of the Sertoli cell in the fetal, pubertal and adult mammalian testis; mechanisms regulating spermatogonial differentiation; stem cells in mammalian gonads; the role of microRNAs in cell differentiation during gonad development; human sex development and its disorders; as well as methods for the study of gonadal development.

This volume provides in-depth reviews of model systems that exemplify the arms race in host-pathogen interactions. Somatic adaptations are responsible for the individualization of biological responses to the environment, and the continual struggle between host immune systems and invading pathogens has given rise to corresponding processes that produce molecular variation. Whether in mollusks or human beings, various host somatic mechanisms have evolved independently, providing responses to counter rapidly-changing pathogens. The pathways they utilize can include non-heritable changes involving RNA and post-translational modifications, or changes that produce somatic DNA recombination and mutation. For infectious organisms such as protozoans and flatworms, antigenic variation is central to their survival strategy. Evolving the ability to evade the host immune system not only increases their chances of survival but is also necessary for successful re-infection within the host population.

This volume covers the current knowledge base on the role of signaling and environmental pathways that control the normal development of germline stem cells, meiotic progression of oocytes, events of oocyte maturation and fertilization, and the birth of an embryo.Germ cells are uniquely poised to sustain life across generations through the fusion of oocyte and sperm. Because of the central importance of germ cells to life, much work has been dedicated to obtaining a clear understanding of the molecular and signaling events that control their formation and maintenance.  Germ cells are set aside from somatic cells in the embryo and go through specialized meiotic cell cycles as the animal matures. These cell cycles are interspersed with long periods of arrest. In human females, meiosis I is initiated in the fetus. At birth, oocytes are arrested in meiosis I; after puberty, every month an oocyte initiates meiosis II – ovulation. Upon sperm availability these cells are fertilized, generate an embryo, and the cycle-of-life continues. During meiotic I progression and arrest, the fitness of oocytes and their progeny are likely influenced by environmental cues and signaling pathways.A lot of recent work has focused on understanding the mechanisms that regulate oocyte fitness and quality in humans and vertebrates. Much of our understanding on the events of meiosis I and germline stem cell populations comes from work in invertebrates, wherein the germline stem cells produce oocytes continuously through adult development. In both inverbrates and vertebrates nutritional and signaling pathways control the regulation of stem cells in such a manner so as to couple production of gametes with the nutritional availability. Additionally, mature oocytes arrest both in meiosis I and meiosis II, and signaling and nutritional pathways have been shown to regulate their formation, and maintenance, such that despite long periods ofarrest, the oocyte quality is assured and errors in chromosome segregation and varied cytoplasmic events are minimal.

Kidney Development and Disease brings together established and young investigators who are leading authorities in nephrology to describe recent advances in three primary areas of research. The first section describes the use of animal models as powerful tools for the discovery of numerous molecular mechanisms regulating kidney development. The second section focuses on nephric cell renewal and differentiation, which lead to diverse cell fates within the developing kidney, and discusses diseases resulting from the aberrant regulation of the balance between cell fate decisions. The final section concentrates on morphogenesis of the developing kidney and its maintenance after formation as well as the diseases resulting from failures in these processes.Kidney form and function have been extensively studied for centuries, leading to discoveries related to their development and disease. Recent scientific advances in molecular and imaging techniques have broadenedour understanding of nephron development and maintenance as well as the diseases related to these processes.

This book provides readers with an overview of the frequent occurrence of asymmetric cell division. Employing a broad range of examples, it highlights how this mode of cell division constitutes the basis of multicellular organism development and how its misregulation can lead to cancer.To underline such developmental correlations, readers will for example gain insights into stem cell fate and tumor growth. In turn, subsequent chapters include descriptions of asymmetric cell division from unicellular organisms to humans in both physiological and pathological conditions. The book also illustrates the importance of this process for evolution and our need to understand the background mechanisms, offering a valuable guide not only for students in the field of developmental biology but also for experienced researchers from neighboring fields.