Solomon H. Snyder – författare

"Psychopharmacology of the Aging Nervous System" was selected as the topic for Volume 20 of the Handbook of PsychopharmacoloffY. Senile dementia is now widely recognized as a medical and social problem likely to reach epidemic proportions by the turn of the century. By that time it is esti­ mated that almost 20% of the population in most developed countries will be over the age of 65 and at a conservative estimate 1 in 10 of them will suffer from a dementing illness. Many symposia have appeared over the last few years describing the neuropathological and neurochemical deficiencies in Alzheimer's and other forms of dementia, the neuropsychological features of the disease, and attempts to treat it. In this volume, we have selected topics and authors who are beginning to question some of the earlier assumptions and to ask different questions about dementia. In the first four chapters the neuropathology and neu­ rochemistry of dementia are reevaluated. It is important to understand the relationship between the formation of amyloid plaques and neurofibrillary tangles, the progressive degeneration in cortex, and the neurochemical deafferentation of cortex. In particular, the possibility is considered that the most severe pathology is seen in a well-defined limbo/cortical circuitry known to be involved in mnemonic processing. The growing interest in the genetic determinants of familial Alz­ heimer's is reviewed. It is also recognized that detailed comparisons of the neural and psychological characteristics of the various degenerative dis­ eases that impair cognitive processing may be valuable.

Volumes 7 and 8 of the Handbook were published in 1977. In Volume 7 methods for studying unconditioned and conditioned behavior were reviewed. Attention was given to both ethological methods and operant conditioning techniques as applied to some selected aspects of behavior. Genetic, developmental, and environmental factors influencing behavior were also discussed. In Volume 8, neurotransmitter systems, and in par­ ticular brain circuits, were discussed in relation to behavior and to the effects of psychoactive drugs on behavior. The coverage was not exhaus­ tive because of space limitations. The topics selected for review were, at the time, the focus of considerable experimental effort; they included homeostasis-motivated behaviors: sleep, locomotion, feeding, drinking, and sexual behavior. Brain dopamine systems were therefore discussed in depth, since they were already known to be centrally involved in motivated behaviors. Learning mechanisms and emotion were reviewed in the remaining chapters. In 1984 we initiated an update of behavioral pharmacology to review areas of progress within the same scope as the earlier volumes. This update continues in Volume 19. Among the contributions are several that represent important advances in analyzing behavior and the use of more sophisticated methods to define the effect of drugs on particular aspects of behavior. The chapters by Blundell on feeding and Miczek on aggres­ sion illustrate the sophistication of modern ethopharmacology.

"Psychopharmacology of the Aging Nervous System" was selected as the topic for Volume 20 of the Handbook of PsychopharmacoloffY. Senile dementia is now widely recognized as a medical and social problem likely to reach epidemic proportions by the turn of the century. By that time it is esti­ mated that almost 20% of the population in most developed countries will be over the age of 65 and at a conservative estimate 1 in 10 of them will suffer from a dementing illness. Many symposia have appeared over the last few years describing the neuropathological and neurochemical deficiencies in Alzheimer''s and other forms of dementia, the neuropsychological features of the disease, and attempts to treat it. In this volume, we have selected topics and authors who are beginning to question some of the earlier assumptions and to ask different questions about dementia. In the first four chapters the neuropathology and neu­ rochemistry of dementia are reevaluated. It is important to understand the relationship between the formation of amyloid plaques and neurofibrillary tangles, the progressive degeneration in cortex, and the neurochemical deafferentation of cortex. In particular, the possibility is considered that the most severe pathology is seen in a well-defined limbo/cortical circuitry known to be involved in mnemonic processing. The growing interest in the genetic determinants of familial Alz­ heimer''s is reviewed. It is also recognized that detailed comparisons of the neural and psychological characteristics of the various degenerative dis­ eases that impair cognitive processing may be valuable.

Volumes 7 and 8 of the Handbook were published in 1977. In Volume 7 methods for studying unconditioned and conditioned behavior were reviewed. Attention was given to both ethological methods and operant conditioning techniques as applied to some selected aspects of behavior. Genetic, developmental, and environmental factors influencing behavior were also discussed. In Volume 8, neurotransmitter systems, and in par­ ticular brain circuits, were discussed in relation to behavior and to the effects of psychoactive drugs on behavior. The coverage was not exhaus­ tive because of space limitations. The topics selected for review were, at the time, the focus of considerable experimental effort; they included homeostasis-motivated behaviors: sleep, locomotion, feeding, drinking, and sexual behavior. Brain dopamine systems were therefore discussed in depth, since they were already known to be centrally involved in motivated behaviors. Learning mechanisms and emotion were reviewed in the remaining chapters. In 1984 we initiated an update of behavioral pharmacology to review areas of progress within the same scope as the earlier volumes. This update continues in Volume 19. Among the contributions are several that represent important advances in analyzing behavior and the use of more sophisticated methods to define the effect of drugs on particular aspects of behavior. The chapters by Blundell on feeding and Miczek on aggres­ sion illustrate the sophistication of modern ethopharmacology.

Volume 15 of Handbook of Psychopharmacology represents the first of a new series of volumes whose aim is to bring earlier sections of the work up to date by describing the latest developments in the field. It is now seven years since the first Handbook volumes on Basic Neuropharmacology were published, and there have been many important advances. As in many other areas in science, progress in this field has depended to a considerable extent on the availability of new experimental methods, and Volume 15 reviews some major recent developments, including new autoradiographic techniques that allow direct visualization of drug and transmitter receptors in the nervous system, and the pinpointing of the precise locations of the changes in brain metabolism elicited by various drug treatments. Volumes 16 and 17 will cover two of the most active areas for basic research in psychopharmacology at the moment: the characterization of drug and transmitter receptors in brain by radioligand binding techniques, and studies of the role of small peptides in brain function. The latter area, in particular, illustrates how rapidly progress continues to be made in basic research on the mechanisms of chemical communication within the nervous system. Seven years ago when the Handbook first appeared none of the opioid peptides (enkephalins and endorphins) had yet been identified. Since then a whole new area of basic biological research has focused on these substances, and in addition we know of more than thirty other neuropeptides with putative eNS transmitter functions.

Volume 15 of Handbook of Psychopharmacology represents the first of a new series of volumes whose aim is to bring earlier sections of the work up to date by describing the latest developments in the field. It is now seven years since the first Handbook volumes on Basic Neuropharmacology were published, and there have been many important advances. As in many other areas in science, progress in this field has depended to a considerable extent on the availability of new experimental methods, and Volume 15 reviews some major recent developments, including new autoradiographic techniques that allow direct visualization of drug and transmitter receptors in the nervous system, and the pinpointing of the precise locations of the changes in brain metabolism elicited by various drug treatments. Volumes 16 and 17 will cover two of the most active areas for basic research in psychopharmacology at the moment: the characterization of drug and transmitter receptors in brain by radioligand binding techniques, and studies of the role of small peptides in brain function. The latter area, in particular, illustrates how rapidly progress continues to be made in basic research on the mechanisms of chemical communication within the nervous system. Seven years ago when the Handbook first appeared none of the opioid peptides (enkephalins and endorphins) had yet been identified. Since then a whole new area of basic biological research has focused on these substances, and in addition we know of more than thirty other neuropeptides with putative eNS transmitter functions.

It is now eight years since the first Handbook volumes on Basic Neuro­ pharmacology were published, and there have been many important advances. As in many other areas in science, progress in this field has depended to a considerable extent on the availability of new experimental methods, and Volume 15 reviews some major recent developments, including new autoradiographic techniques that allow direct visualization of drug and transmitter receptors in the nervous system, and the pin­ pointing of the precise locations of the changes in brain metabolism elicited by various drug treatments. Volumes 16 and 17 cover two of the most active areas for basic research in psychopharmacology at the moment: the characterization of drug and transmitter receptors in brain by radioligand binding techniques, and studies of the role of small peptides in brain function. The latter area, in particular, illustrates how rapidly progress continues to be made in basic research on the mechanisms of chemical communication within the nervous system. Eight years ago when the Handbook first appeared none of the opioid peptides (enkephalins and endorphins) had yet been identified. Since then a whole new area of basic biological research has focused on these substances, and in addition we know of more than thirty other neuropeptides with putative eNS trans­ mitter functions.

It is now eight years since the first Handbook volumes on Basic Neuro­ pharmacology were published, and there have been many important advances. As in many other areas in science, progress in this field has depended to a considerable extent on the availability of new experimental methods, and Volume 15 reviews some major recent developments, including new autoradiographic techniques that allow direct visualization of drug and transmitter receptors in the nervous system, and the pin­ pointing of the precise locations of the changes in brain metabolism elicited by various drug treatments. Volumes 16 and 17 cover two of the most active areas for basic research in psychopharmacology at the moment: the characterization of drug and transmitter receptors in brain by radioligand binding techniques, and studies of the role of small peptides in brain function. The latter area, in particular, illustrates how rapidly progress continues to be made in basic research on the mechanisms of chemical communication within the nervous system. Eight years ago when the Handbook first appeared none of the opioid peptides (enkephalins and endorphins) had yet been identified. Since then a whole new area of basic biological research has focused on these substances, and in addition we know of more than thirty other neuropeptides with putative eNS trans­ mitter functions.

Volume 18 of the Handbook of Psychopharmacology represents the first of a series of volumes intended to bring earlier sections of the work up to date. Volumes 7, 8, and 9, published in 1977 and 1978, dealt with principles of behavior, drugs and neurotransmitters, and neuroanatomy. In subsequent volumes dedicated to these issues, a mixture of topics will be covered in a given volume, covering both advances in basic knowledge in these three areas of the subject and reviews of theoretical and meth­ odological issues deemed to be of particular relevance at present. L. L. !. S. D. !. S. H. S. vii CONTENTS CHAPTER 1 Behavior as a Measure of Adverse Responses to Environmental Contaminants BERNARD WEISS 1. Special Perspectives 1 1. 1. Pharmacology and Toxicology . . . . . . . . . . . . . . 1 1. 2. Origins of Behavioral Toxicology . . . . . . . . . . . . 2 1. 3. Special Problems 2 2. Specific Substances . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2. 1. Heavy Metals 5 2. 2. Volatile Solvents 20 2. 3. Pesticides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 2. 4. Air Pollutants 36 2. 5. Nonspecific Poisons . . . . . . . . . . . . . . . . . . . . . . 42 2. 6. Food Additives 44 3. Future Prospects 47 3. 1. Chemical Waste . . . . . . . . . . . . . . . . . . . . . . . . . 47 3. 2. Susceptible Populations . . . . 48 3. 3. The Statistics of Risk . . . . . . . . . . . . . . . . . . . . . 49 3. 4. Screening 49 3. 5. Implications for Psychopharmacology 51 4. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 CHAPTER 2 State Dependent Learning and Drug Discriminations DONALD A. OVERTON 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 2. Description of State Dependent Learning . . . . . . . . . . 59ix x CONTENTS 3. History of Development of Knowledge about SDL 60 3. 1. Nineteenth Century Reports. . . . . . . . . . . . . . . .

Volume 18 of the Handbook of Psychopharmacology represents the first of a series of volumes intended to bring earlier sections of the work up to date. Volumes 7, 8, and 9, published in 1977 and 1978, dealt with principles of behavior, drugs and neurotransmitters, and neuroanatomy. In subsequent volumes dedicated to these issues, a mixture of topics will be covered in a given volume, covering both advances in basic knowledge in these three areas of the subject and reviews of theoretical and meth­ odological issues deemed to be of particular relevance at present. L. L. !. S. D. !. S. H. S. vii CONTENTS CHAPTER 1 Behavior as a Measure of Adverse Responses to Environmental Contaminants BERNARD WEISS 1. Special Perspectives 1 1. 1. Pharmacology and Toxicology . . . . . . . . . . . . . . 1 1. 2. Origins of Behavioral Toxicology . . . . . . . . . . . . 2 1. 3. Special Problems 2 2. Specific Substances . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2. 1. Heavy Metals 5 2. 2. Volatile Solvents 20 2. 3. Pesticides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 2. 4. Air Pollutants 36 2. 5. Nonspecific Poisons . . . . . . . . . . . . . . . . . . . . . . 42 2. 6. Food Additives 44 3. Future Prospects 47 3. 1. Chemical Waste . . . . . . . . . . . . . . . . . . . . . . . . . 47 3. 2. Susceptible Populations . . . . 48 3. 3. The Statistics of Risk . . . . . . . . . . . . . . . . . . . . . 49 3. 4. Screening 49 3. 5. Implications for Psychopharmacology 51 4. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 CHAPTER 2 State Dependent Learning and Drug Discriminations DONALD A. OVERTON 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 2. Description of State Dependent Learning . . . . . . . . . . 59ix x CONTENTS 3. History of Development of Knowledge about SDL 60 3. 1. Nineteenth Century Reports. . . . . . . . . . . . . . . .

Frontiers in Catecholamine Research is a collection of papers presented at the Third International Catecholamine Symposium, held at the University of Strasbourg, Strasbourg, France, on May 20-25, 1973. This book is organized into nine parts encompassing 205 chapters. The text begins with a discussion on clinically and experimentally used drugs that have been developed or whose mechanism of action has been clarified through monoamine research. Parts II and III deal with enzymes related to catecholamine studies, their properties, regulation, genetics, mechanism of action, and localization. Parts IV and V examine the concepts of synaptic dynamics of brain regulators and the isolation, characterization, methods of analysis, and mechanism of action of catecholamines. Part VI focuses on the complexities that surround the extrapolation of catecholamine function into the realms of electrophysiology and behavior. Part VII discusses the metabolism, behavioral, neurological, and physiological effects of amphetamine and other drugs of abuse. The concluding parts describe the role of catecholamine and its metabolism in neurologic diseases, such as schizophrenia.

Solomon Snyder has been instrumental in the establishment of modern psychopharmacology - as a pioneer in the identification of receptors for neurotransmitters and drugs and in the explanation of the actions of psychotropic agents. Science and Psychiatry is a collection of some of his best scientific papers, publications ranging over forty years that represent important advances in psychopharmacology and molecular biology. Audacious and unanticipated when they first appeared, these papers opened up new areas of understanding and revolutionized the modern study of the brain. Republished here, they show why fundamental research into the ""messengers of the mind"" is as essential for clinicians as for researchers.Many of these papers have clear clinical relevance, offering insight into modern neuroscience to help make sense of the bewildering array of available psychotropic medications and point the way toward more effective and safer agents. Others describe the underpinnings of psychopharmacology that practitioners need to know, especially regarding the role of receptors in drug action. Each of the nine groups of research articles is accompanied by a commentary by a well-known authority, putting the discoveries in perspective and providing a broad overview of subjects ranging from characterization of the enkephalins to serotonin receptor subtypes. The final set of papers focuses on apoptosis, the general process of cell suicide, where Snyder's work with bilirubin holds promise for treating neurodegenerative disorders. And in a closing piece, ""The Audacity Principle in Science,"" Snyder speculates about factors conducive to creativity and efficacy in scientific discovery.The articles particularly describe four groups of extraordinary discoveries for which Snyder is widely recognized: Identification of opiate receptors, providing keys to understanding pain perception; Characterization of the IP3 receptor, exploring its role as a target for lithium treatment in manic-depressive disorders; Establishment of nitric oxide as a transmitter in the brain, radically transforming conceptualizations of neurotransmission; Discovery that D-serine is the normal stimulus for the glycine site of the NMDA receptor, providing new insight into the regulation of the receptor important for learning and memory Hailed as one of the preeminent scientists of the past twenty years, Snyder is a consummate researcher who confesses to remaining obsessed with the need to ""think thoughts no one else has thought before."" Science and Psychiatry clearly shows how that urge accounts for the diversity of challenges he has taken on as it conveys the origins of modern psychopharmacologic practice.