Journal
BRITISH JOURNAL OF PSYCHIATRY
Volume 178, Issue -, Pages S53-S59Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1192/bjp.178.40.s53
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Background Alzheimer's disease (AD) is a common, complex, age-related disorder in which both genetic and environmental factors are important. Aims To integrate recent studies on genetic and environmental factors in AD into a multi-factorial disease model. Method Disease models to explain gene-environment interaction in cardiovascular disease are related to observations on AD. Results Informative, community based studies on the genetic epidemiology of AD are rare. Putative risk factors from the Scottish studies include increased paternal age in AD men and coal mining as paternal occupation in both AD and vascular dementia. Migration effects suggest that environmental factors in high incidence AD areas are important during adult life. Conclusions The studies summarised do not provide sufficient data to support a single comprehensive disease model of gene-environment interaction in AD. Future studies will require very large ( greater than or equal to 600) sample sizes, molecular genetic analysis, and environmental data that span neurodevelopment and the period between disease onset and appearance of clinical symptoms. Declaration of interest The author has received consultancy fees from Bristol-Myers Squibb, Novartis, Esai, Hoechst Marion Roussel and Bayer. He was principal UK investigator in clinical trials of rivastigmine.
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