Linkage and Association Analysis of Alcohol Dependence Genes
Author Information
Author(s): Zhong Xiaoyun, Zhang Heping
Primary Institution: Yale University School of Medicine
Hypothesis
Can age at onset data improve the identification of susceptibility genes for alcohol dependence?
Conclusion
The study found significant evidence of linkage and association for alcohol dependence genes using a combined analysis approach.
Supporting Evidence
- Linkage analysis revealed signals on chromosomes 1, 2, 4, and 7.
- Age of onset data improved the ability to map genes for complex diseases.
- Evidence of linkage to ALDX1 was found around chromosome 7 at 145 cM.
- Evidence of linkage to ALDX2 was found around chromosome 12.
Takeaway
Researchers looked at families to find genes that might make people more likely to have problems with alcohol, using information about when they started drinking.
Methodology
The study used linkage analysis and association tests based on frailty models to analyze genetic data from families with alcohol dependence.
Limitations
The p-values reported were not corrected for multiple comparisons.
Participant Demographics
The dataset included 143 nuclear and multigenerational families with 1,614 individuals, with both ALDX1 and ALDX2 alcohol dependence phenotypes.
Statistical Information
P-Value
0.006, 0.008, 0.016
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
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