The misfolding and aggregation of specific proteins is an early and obligatory event in many of the age-related neurodegenerative diseases of humans. The initial cause of this pathogenic cascade and the means whereby disease spreads through the nervous system, remain uncertain. A recent surge of research, first instigated by pathologic similarities between prion disease and Alzheimer's disease, increasingly implicates the conversion of disease-specific proteins into an aggregate-prone b-sheet-rich state as the prime mover of the neurodegenerative process. This prion-like corruptive protein...

This volume contains the proceedings of the 14th Colloque Medecine et Recher che of the Fondation Ipsen pour la Recherche Therapeutique devoted to Alzhei mer's disease. It was held in Paris on May 25, 1998 and dedicated to the epidemi ological study of this dementia, a very important issue because the incidence and prevalence of Alzheimer's disease rise exponentially with age. Epidemiological findings not only confirm dementia as a major challenge for the coming years but also contribute defining risk factors, predicting and may be preventing this disease. All these issues have been tackled...

Homeostasis involves a delicate interplay between generative and degenerative processes to maintain a stable internal environment. In biological systems, equilibrium is established and controlled through a series of negative feedback mechanisms driven by a range of signal transduction processes. Failures in these complex communication pathways result in instability leading to disease. Cancer represents a state of imbalance caused by an excess of cell proliferation. In contrast, neurodegeneration is a consequence of excessive cell loss in the nervous system. Both of these disorders exhort...

Alzheimer's disease is one of the major scientific, medical and social challenges of our time. This book (the third volume of proceedings of the Colloques Medecine et Recherche of the Fondation Ipsen pour la Recherche Therapeutique) is dedicated to neuronal grafting and Alzheimer's disease. The wealth of basic information presented testifies to the progress that has been achieved in intracerebral grafting and to the utility of intracerebral grafting as a tool for the understanding of brain development, adult neuronal plasticity and age-related pathology. An answer to the question, whether...

Alzheimer's disease invades the brain from the inside. Unlike an abcess, a metas- tasis or an infarct, the disease follows specific tracks and avoids certain cortical areas while flourishing in others. Any observer is struck by the exquisite selectiv- ity of the lesions and could, indeed, conclude that Alzheimer's disease knows neuroanatomy. However, should the term "disease" be used to define this disor- der? Several genes, located on at least three different chromosomes, have been implicated in the disease. The ApoE4 genotype has been shown to be an impor- tant risk factor, but dementia...

Can molecular mechanisms involved in neural development help us to understand, prevent and perhaps reverse the course of brain ageing and neurodegenerative disorders? Brain development and function require complex cellular and molecular processes controlled by a number of different signaling mechanisms. One such signaling mechanism, the Notch pathway, has been recognized as an important player in the regulation of cellfate decisions during early neural development. However, the action of this evolutionary conserved and widely used cell-cell interaction mechanism is not confined to the...

Any mention of the relationship, still poorly understood, between body (or brain) and mind invariably invokes the name of Descartes, who is often thought of as the father of modern philosophy and perhaps of neurophilosophy. Although a native of the heart of France (the region around Tours), Rene Descartes travelled widely, as everyone knows, especially to Holland and Sweden. It should come as no surprise, that the Congress of Neurophilosophy and Alzheimer's Disease was the first in the series of Fondation Ipsen Colloques Medecine et Recherche to be held outside France. The meeting was held in...

The misfolding and aggregation of specific proteins is an early and obligatory event in many of the age-related neurodegenerative diseases of humans. The initial cause of this pathogenic cascade and the means whereby disease spreads through the nervous system, remain uncertain. A recent surge of research, first instigated by pathologic similarities between prion disease and Alzheimer's disease, increasingly implicates the conversion of disease-specific proteins into an aggregate-prone b-sheet-rich state as the prime mover of the neurodegenerative process. This prion-like corruptive protein...