For 20 years, genetic linkage combined with positional cloninghas offered a rational and increasingly straightforward routeto finding gene mutations that lead to monogenic disease, suchas cystic fibrosis and Huntington's disease (see the Glossary).With a few important exceptions, these searches have led tomutations that alter the amino acid sequence of a protein andthat enormously increase the risk of disease.
During the past few years, genomewide association studies haveidentified a large number of robust associations between specificchromosomal loci and complex human disease, such as type 2 diabetesand rheumatoid arthritis1 (Figure 1). . . . [Full Text of this Article]
The Genetics of Gene Expression
Rare High-Risk Coding Variants
The Power of the Pathway
Moving from Dichotomous to Graded Genetic Risk
Centralized Resources
Environmental Effect
Source Information
From the Institute of Neurology, University College London, London (J.H.); and the Laboratory of Neurogenetics, Bethesda, MD (A.S.). This article (10.1056/NEJMra0808700) was published at NEJM.org on April 15, 2009.
Address reprint requests to Dr. Hardy at the Institute of Neurology, University College London, Queen Sq., London WC1N 3BG, United Kingdom, or at jhardy@ion.ucl.ac.uk.
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