Advances in Cell Aging and Gerontology - Böcker

Apoptosis, or programmed cell death, is an adaptive form of cell death that plays a critical role in turnover of mitotic cells and various tissues in the adult, including epithelial cells, fibroblasts and various endocrine cells. Programmed cell death also plays a major role in development in organizing the body plan and molding intricate cellular structures such as nerve cell circuits in the brain. Rapidly progressing research into the molecular and biochemical underpinnings of the programmed cell death process are revealing novel genetic programs and molecular interactions that coordinate a process that results in death and removal of cells without an immune response and in the absence of the adverse effects on neighboring cells.

Programmed Cell Death, Volume I, critically details the molecular, biochemical and cellular mechanisms of apoptosis. This volume covers programmed cell death in a variety of tissues and organ systems highlighting the interesting families of proteins involved in promoting or preventing apoptosis. These include the caspase and calpain families of proteases, Bcl-2 family members, and inhibitors of apoptosis proteins. Each chapter is written by an internationally recognized expert in a particular aspect of programmed cell death.

This book will provide the reader with a comprehensive understanding of the cascade of events leading from an apoptotic signal, such as trophic factor withdrawal or increased oxidative stress, to cell death. Importantly, this volume also covers signaling mechanisms designed to prevent apoptosis. Such anti-apoptotic signaling cascades involve neurotrophic factors and stress response pathways. Programmed Cell Death, Volume I, provides the molecular and cellular foundation for http://www.elsevier.com/locate/isbn/0444507302Programmed Cell Death, Volume II in which the roles of aberrant regulation of apoptosis in human diseases ranging from cancer to Alzheimer's disease are considered.

Aging occurs at the level of individual cells, a complex interplay between intrinsic "programming" and exogenous "wear and tear", with genetically-determined cellular capacity to repair environmentally-induced DNA damage playing a central role in the rate of aging and its specific manifestations. In 12 chapters, "The Role of DNA Damage and Repair in Cell Aging" provides an intellectual framework for aging of mitotic and post-mitotic cells, describes a variety of model systems for further studies, and reviews current concepts of DNA responses and their relationship to the phenomenon of aging.

As part of a series entitled "Advances in Cell Aging and Gerontology," this volume also summarizes seminal recent discoveries such as the molecular basis for Werner syndrome (a mutant DNA helicase), the complementary roles of telomere shortening and telomerase activity in cell senescence versus immortalization, the role of apoptosis in the homeostasis of aging tissue, and the existence of an inducible SOS-like response in mammalian cells that minimizes DNA damage from repeatedly encountered injurious environmental agents. Insights into the relationship between cellular aging and age-associated diseases, particularly malignancies, are also provided in several chapters.

This book is an excellent single source of information for anyone interested in DNA repair, mechanisms of aging, or certainly their intersection. Students will gain a general appreciation of these fields, but even the most senior investigators will benefit from the detailed coverage of rapidly advancing areas.

Collectively, the chapters in this work will provide the reader with novel insight into the inter-relationships of the function of different organelles in the sequences of events that lead to cellular dysfunction and degeneration in the aging human population. The chapters are rich in information for cell and molecular biologists pursuing studies of the different diseases covered. In addition, the clinician will find value in understanding mechanisms underlying age-related disease as such an understanding will lead to novel therapeutic approaches for an array of age-related diseases.

This volume of Advances in Cell Aging and Gerontology critically reviews the rapidly advancing area of telomerase research with a focus at the molecular and cellular levels. The clearly established function of telomerase is to maintain chromosome ends during successive rounds of cell division by adding a six base DNA repeat on to the telomeric ends of chromosomes. As presented in the chapters of this volume, the mechanisms that regulate telomerase expression and activity are complex. Moreover, emerging data suggest additional roles for telomerase in the regulation of cell differentiation and survival.

It is expected that this quite comprehensive volume will provide a valuable resource for graduate students and postdocs in the telomerase field and for established investigators in other fields who are beginning to study telomerase in their particular research program. With an increasing number of proteins being brought into the fold of telomerase research (e.g., DNA damage and repair response proteins, heat-shock proteins, and proteins in various signal transduction cascades) many new scientists are beginning to study this enzyme from novel vantage points.

This volume provides a timely and thorough review of the current state of understanding of a fascinating type of cell that is capable of forming many or all cells in the body. In humans and other mammals embryonic stem cells, the immediate offspring of the fertilized egg, are capable of forming any type of cell in the body. Moreover stem cells are present in many different tissues in adults that are capable of dividing and differentiating into the specific cell types that comprise the organ in which they reside.

A major focus of the book is to provide the reader with up-to-date information on the molecular mechanisms that regulate the proliferation, differentiation and survival of stem cells, and how aging and age-related disease impacts on stem cells. Leading authorities detail the properties and therapeutic potential of embryonic stem cells and stem cells of the nervous and immune systems, muscle and bone. Particularly exciting are emerging technologies for using stem cells to treat human age-related diseases including cardiovascular disease, diabetes, neurodegenerative disorders such as Parkinson's and Alzheimer's diseases.

This book will be a valuable reference for developmental biologists and for scientists and clinicians who study and treat a variety of diseases.

This volume of Advances in Cell Aging and Gerontology provides a timely review on the molecular and cellular basis of cardiovascular diseases (CVD). Age itself is the leading risk factor for cardiovascular diseases, which include loss of vasomotor function, athero- and arterio-sclerosis, hypertension, congestive heart failure and stroke. Together these pathologies comprise the leading causes of permanent disability, hospitalization and death for individuals over the age of 65. Thus, there is a critical need to assess both the age-associated causes leading to CVD as well as the current state of knowledge on preventive regimens designed to slow or modulate disease progression.

This book concisely summarizes the current knowledge related to the major aspects contributing to cardiovascular disfunction in the elderly as well as potential ways of maintaining or improving human cardiovascular healthspan.

The lipids of cellular membranes not only serve roles in controlling the structure and fluidity of the membrane, but are increasingly recognized for their roles as signalling molecules and modifiers of membrane protein function. Recent studies described in this volume reveal striking changes in membrane lipids during aging and in age-related diseases such as cancer, cardiovascular disease and neurodegenerative disorders. Lipids including inositol phospholipids, cholesterol, sphingolipids and ceramides play important roles in signalling cellular responses to stress and specific stimuli such as growth factors, cytokines and neurotransmitters. One or more of these lipid mediators has been linked to the pathogenesis of age-related diseases.

This book provides a comprehensive review of specific membrane lipid mediators and their roles in aging and age-related disease.

Ageing is of perennial interest as a universal feature in all human societies. The genetic background and biochemical bases of ageing processes are currently being revealed in unprecedented detail. It is emerging that one of the main hurdles to be overcome in achieving a long and healthy lifespan is the maintenance of a properly functioning immune system. The main cause of death in people who have achieved "successful ageing" (which mostly means not having succumbed to cancer or cardiovascular disease) is infectious disease, caused by immunosenescence. This book contains chapters by many of the leaders in the field of immune-related issues in ageing and remediation.

Experts in the fields of energy metabolism, aging and oxidative stress provide an integrated view of how mechanisms involved in regulating energy metabolism are linked to fundamental processes of aging including cellular stress resistance and free radical production.

During evolution signal transduction pathways and organ systems have been optimised for the efficient seeking, ingestion, storing and using of energy. These signalling pathways play prominent roles in lifespan determination with insulin and related signalling pathways being prime examples. The authors consider how lifespan and healthspan can be extended through knowledge of energy metabolism with the experimental model of dietary restriction being one example. The information in this volume of ACAG will foster novel approaches and experiments for further understanding the roles of energy metabolism in aging and disease.

Recent Events in the Psychology of Aging documents the successful integration of aging into the mainstream of psychology. Leading psychologists present overviews of the key issues and research findings on mainstream topics. These include cognitive neuroscience, visual attention, learning, memory and cognition, as well as personality and happiness. The intersection of aging content with mainstream psychology is also prominent in the areas of emotions, personality, and social psychology as seen in the chapters on subjective well-being, emotional development, self-esteem and personality trajectories.The seven chapters of this book offer information on such topics as: the seven sins of memory, categorizing the common breakdowns of memory in everyday life and the special breakdown of sins that increase with aging; problems with attention and learning; and offers answers to questions such as do emotions get blunted with age; do older people focus more on positive feelings; and the age old question of whether older people are happier than younger people is given in the chapter on the evolving concept of subjective well-being and the multifaceted nature of happiness. Questions about what occurs to one's self-esteem and personality are also masterfully discussed and the answers may be surprising. The concluding seventh chapter provides a cultural lens on the biopsychosocial study of aging.

It can be argued that ATP is the most important molecule in cells. Not only is ATP the key energy source for cells, but it is also the source of phosphate groups that are transferred to a variety of substrate proteins via the action of elaborate families of protein kinases. An equally elaborate array of protein phosphatases can remove phosphate groups from proteins. It is now well established that protein phosphorylation is a widely used mechanism for cells to selectively modulate the function of a variety of proteins including enzymes, ion channels and pumps and structural proteins. In this volume of ACAG leading experts describe the evidence that protein phosphorylation is altered in aging and age-related disease.

Protein phosphorylation controls fundamental processes such as transcription and translation, regulation of the cell cycle, signalling within and between cells, cell motility, synaptic function and so on. Recent findings are revealing how phosphorylation dependent signalling cascades may control lifespan with a prime example being the insulin-signalling pathway first described in c-elegans and now emerging as an important regulator of lifespan of mammals also. Many of the functional changes that occur during aging such as impaired learning and memory and altered energy metabolism are controlled by protein phosphorylation and it is, therefore, important to understand how mechanisms of protein phosphorylation may either mediate aging or provide adaptive responses that allow successful disease-free aging. The authors in addition to considering the roles of protein phosphorylation in aging describe the evidence that abnormalities in protein phosphorylation contribute to the pathogenesis of major age-related diseases including diabetes, atherosclerosis and neurodegenerative disorders such as Alzheimer's and Parkinson's diseases.

Alterations in sleep are common manifestations of aging that can lead to significant health problems and contribute to behavioural problems associated with age-related neurodegenerative disorders such as Alzheimer's and Parkinson's diseases. Recent advances have revealed key cellular and molecular mechanisms involved in sleep regulation, and this knowledge is helping to advance an understanding of both the normal functions of sleep and the mechanisms responsible for abnormalities in sleep in various neurological conditions and during normal aging. This volume of Advances in Cell Aging and Gerontology brings together chapters by leaders in the fields of sleep research and the neurobiology of aging. The book starts with chapters describing fundamental aspects of the neurocircuitry involved in sleep, patterns of brain activity during the different stages of sleep and disturbances of sleep during aging. The links between depression, anxiety and insomnia are reviewed in regards to the underlying neurochemical alterations that appear to involve abnormalities in neurotransmitter and neurotrophic factor signalling. The evolutionary basis of sleep is reviewed and the emerging evidence supporting a major role for sleep in learning and memory is described. The bulk of the book focuses on specific sleep disorders associated with aging and age-related neurodegenerative disorders. A comprehensive consideration of this topic is woven through a number of chapters that address both basic research and clinical aspects of sleep abnormalities during aging and in disease. The impact of sleep on the immune system is described. The articles are written in a high level of detail and are comprehensive, thus providing valuable information for a range of scientists and other well-educated people. In particular, the book will be a valuable resource for graduate students, postdoctoral and senior scientists in the fields of sleep, aging, neurodegenerative disorders and learning and memory. In addition, clinicians will find this book valuable as it provides a bridge between basic research and the treatment of the patients with sleep disorders.* Covers the fields of sleep in aging and age-related disease from neurochemistry to the clinic* Includes detailed summary diagrams that depict key concepts* Provides views of the future of research on sleep and aging, and the potential for prevention and treatment of various sleep disorders