Impairment of energy metabolism is a hallmark of brain aging and several neurodegenerative diseases, such as the Alzheimer’s disease (AD). Age- and disease-related hypometabolism is commonly associated with oxidative stress and they are both regarded as major contributors to the decline in synaptic plasticity and cognition. Neuroinflammatory changes, entailing microglial activation and elevated expression of inflammatory cytokines, also correlate with age-related cognitive decline. It is still under debate whether the mitochondrial dysfunction-induced metabolic deficits or the microglia activation-mediated neuroinflammation is the initiator of the cognitive changes in aging and AD. Nevertheless, multiple lines of evidence support the notion that mitochondrial dysfunction and chronic inflammation exacerbate each other, and these mechanistic diversities have cellular redox dysregulation as a common denominator. This research topic focuses on the role of a metabolic-inflammatory axis encompassing the bioenergetic activity, brain inflammatory responses and their redox regulation in healthy brain aging and neurodegenerative diseases. Dynamic interactions among these systems are reviewed in terms of their causative or in-tandem occurrence and how the systemic environment, –e.g., insulin resistance, diabetes, and systemic inflammation–, impacts on brain function.

The enteric nervous system (ENS) is a complex neural network embedded in the gut wall that orchestrates the reflex behaviors of the intestine. The ENS is often referred to as the “little brain” in the gut because the ENS is more similar in size, complexity and autonomy to the central nervous system (CNS) than other components of the autonomic nervous system. Like the brain, the ENS is composed of neurons that are surrounded by glial cells. Enteric glia are a unique type of peripheral glia that are similar to astrocytes of the CNS. Yet enteric glial cells also differ from astrocytes in many important ways. The roles of enteric glial cell populations in the gut are beginning to come to light and recent evidence implicates enteric glia in almost every aspect of gastrointestinal physiology and pathophysiology. However, elucidating the exact mechanisms by which enteric glia influence gastrointestinal physiology and identifying how those roles are altered during gastrointestinal pathophysiology remain areas of intense research. The purpose of this e-book is to provide an introduction to enteric glial cells and to act as a resource for ongoing studies on this fascinating population of glia. Table of Contents: Introduction / A Historical Perspective on Enteric Glia / Enteric Glia: The Astroglia of the Gut / Molecular Composition of Enteric Glia / Development of Enteric Glia / Functional Roles of Enteric Glia / Enteric Glia and Disease Processes in the Gut / Concluding Remarks / References / Author Biography

Oxidative stress is the result of an imbalance in pro-oxidant/antioxidant homeostasis that leads to the generation of toxic reactive oxygen species. Brain cells are continuously exposed to reactive oxygen species generated by oxidative metabolism, and in certain pathological conditions defense mechanisms against oxygen radicals may be weakened and/or overwhelmed. DNA is a potential target for oxidative damage, and genomic damage can contribute to neuropathogenesis. It is important therefore to identify tools for the quantitative analysis of DNA damage in models on neurological disorders. This book presents detailed information on various neurodegenerative disorders and their connection with oxidative stress. This information will provide clinicians with directions to treat these disorders with appropriate therapy and is also of vital importance for the drug industries for the design of new drugs for treatment of degenerative disorders.* Contains the latest information on the subject of neurodegenerative disorders* Reflects on various factors involved in degeneration and gives suggestions for how to tackle these problems

The book provides chapters on sex hormones and their modulation in neurodegenerative processes and pathologies, from basic molecular mechanisms, physiology, gender differences, to neuroprotection and clinical aspects for potential novel pharmacotherapy approaches. The book contains 14 chapters written by authors from various biomedical professions, from basic researchers in biology and physiology to medicine and veterinary medicine, pharmacologists, psychiatrist, etc. Chapters sum up the past and current knowledge on sex hormones, representing original new insights into their role in brain functioning, mental disorders and neurodegenerative diseases. The book is written for a broad range of audience, from biomedical students to highly profiled medical specialists and biomedical researchers, helping them to expand their knowledge on sex hormones in neurodegenerative processes and opening new questions for further investigation.

The progressive ageing of the general population and the consequent increase of the number of old people has made the typical medical problems of aged people more frequently observed, and particularly the problems related to the ageing brain. This new book is an updated overview of relevant aspects of cognitive decline associated with ageing. Within the wide landscape of brain ageing the authors reconsider the role of the main predisposing factors and risk factors on the development of various form of mental decline, from mild cognitive impairment to dementia. The strength of this book is the large, updated overview of the most recent data of scientific literature regarding the role of genetic, metabolic and environmental factors on the predisposition and onset of cognitive decline. Particular attention is paid to the dietary micro- and macronutrients and to their possible role in the pathogenesis of the various form of dementigen disorders.

In the decade before the publication of this study, melanocortin biology matured. Three additional receptors were discovered, and animal models were established addressing the function of each receptor. Researchers now know that the diverse physiologic responses to melanocortins - including their role in development, weight and endocrine regulation, cortisol production, secretion from exocrine glands, and pigmentation - can be defined in terms of individual receptors. In this text, contributors from the field of evolutionary biology, peptide chemistry, pigmentation biology, neuroscience, endocrinology and genetics provide the reader with a comprehensive review of melanocortin biology. Six areas of active research are addressed: peptide and small molecule chemistry; receptor structure and function; energy homeostasis; pigmentation; adrenocorticol function; and behaviour. There are 56 papers and 20 posters altogether, taken from the Fifth Melanocortin Meeting, held in 2002.

This book analyzes the effects of estrogens and progesterone on brain cells, the immune system, neuro inflammation, myelin formation and steroid receptor distribution, as well as their clinical impacts. It also explores the relationship between sex-steroid withdrawal and the development of brain symptoms such as hot flushes, sleep disorders, mood changes, depression and also cognitive disorders and dementia, as well as the effects of hormone menopause therapy on such symptoms and diseases. Starting with obstetrical history and cardiovascular risk in later life, the second part of the book examines the effects of estrogens and progestogens on vascular tissues, atherosclerosis and coronary heart diseases, as well as the impact of hormone replacement therapies on cardiovascular risks and mortality. This volume is a useful, clear and up-to-date tool for gynecologists, endocrinologists, neurologists and cardiologists, and serves as a valuable source of information for all physicians involved in women’s health.

This authoritative handbook covers all aspects of immunosenescence, with contributions from experts in the research and clinical areas. It examines methods and models for studying immunosenescence; genetics; mechanisms including receptors and signal transduction; clinical relevance in disease states including infections, autoimmunity, cancer, metabolic syndrome, neurodegenerative diseases, frailty and osteoporosis; and much more.

The editor of this volume, having research interests in the field of ROS production and the damage to cellular systems, has identified a number of enzymes showing ·OH scavenging activities details of which are anticipated to be published in the near future as confirmatory experiments are awaited. It is hoped that the information presented in this book on NDs will stimulate both expert and novice researchers in the field with excellent overviews of the current status of research and pointers to future research goals. Clinicians, nurses as well as families and caregivers should also benefit from the material presented in handling and treating their specialised cases. Also the insights gained should be valuable for further understanding of the diseases at molecular levels and should lead to development of new biomarkers, novel diagnostic tools and more effective therapeutic drugs to treat the clinical problems raised by these devastating diseases.