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Journal ArticleDOI

Association study designs for complex diseases

Lon R. Cardon, +1 more
- 01 Feb 2001 - 
- Vol. 2, Iss: 2, pp 91-99
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TLDR
With the discovery of massive numbers of genetic markers and the development of better tools for genotyping, association studies will inevitably proliferate and now is the time to consider critically the design of such studies to avoid the mistakes of the past and to maximize their potential to identify new components of disease.
Abstract
Assessing the association between DNA variants and disease has been used widely to identify regions of the genome and candidate genes that contribute to disease. However, there are numerous examples of associations that cannot be replicated, which has led to skepticism about the utility of the approach for common conditions. With the discovery of massive numbers of genetic markers and the development of better tools for genotyping, association studies will inevitably proliferate. Now is the time to consider critically the design of such studies, to avoid the mistakes of the past and to maximize their potential to identify new components of disease.

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Citations
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Optimal designs for two-stage genome-wide association studies.

TL;DR: A strategy for designing cost‐effective two‐stage GWA studies is described and it is shown that the ratio of stage 2 to stage 1 per genotype cost can strongly influence both the optimal design and the genotyping cost of the study.
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Functional variants of antioxidant genes in smokers with COPD and in those with normal lung function

TL;DR: The 213Gly variant of the SOD3 gene may, through antioxidant or anti-inflammatory effects, confer a degree of resistance in some smokers to the development of COPD.
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Genome-wide association studies: progress and potential for drug discovery and development.

TL;DR: The potential for genome-wide association studies to identify novel therapeutic targets and genetic biomarkers that will be useful for drug discovery, patient selection and stratification in common diseases is discussed.
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Ethical issues in human genomics research in developing countries.

TL;DR: In this paper, the MalariaGEN Consortium identified specific ethical issues raised by such research in Africa, Asia and Oceania, and discussed aspects of data sharing and capacity building that need to be considered for sustainable and mutually beneficial collaborations.
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Nutrigenomics research for personalized nutrition and medicine.

TL;DR: Current nutritional and genetic epidemiological methods yield 'risk factors' on the basis of population studies, but these measures are often assumed to apply to individuals who are likely to differ in genetic make-up, lifestyle, and dietary patterns than to the individuals in the study population.
References
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Journal ArticleDOI

Inference of population structure using multilocus genotype data

TL;DR: Pritch et al. as discussed by the authors proposed a model-based clustering method for using multilocus genotype data to infer population structure and assign individuals to populations, which can be applied to most of the commonly used genetic markers, provided that they are not closely linked.
Journal ArticleDOI

A novel gene containing a trinucleotide repeat that is expanded and unstable on Huntington's disease chromosomes

TL;DR: In this article, the authors used haplotype analysis of linkage disequilibrium to spotlight a small segment of 4p16.3 as the likely location of the defect, which is expanded and unstable on HD chromosomes.
Journal ArticleDOI

Identification of the cystic fibrosis gene: cloning and characterization of complementary DNA.

TL;DR: A deletion of three base pairs that results in the omission of a phenylalanine residue at the center of the first predicted nucleotide-binding domain was detected in CF patients.
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