Linkage Studies of COMT and DBH Gene Expression Levels
Author Information
Author(s): Xing Chao, Torres-Caban Monica, Wang Tao, Lu Qing, Xing Guan, Elston Robert C
Primary Institution: Case Western Reserve University
Hypothesis
The genetic involvement of COMT and DBH on gene mRNA expression levels remains unclear.
Conclusion
The study identified transcriptional regulatory regions for COMT and DBH, with significant effects on their expression levels.
Supporting Evidence
- COMT and DBH are involved in catecholamine metabolism and are candidates for psychiatric disorders.
- The study found an additive effect of the master transcriptional regulatory region 20q13 on COMT expression.
- Chromosome regions 9q34 and 19p13 showed epistatic effects on DBH expression levels.
Takeaway
This study looked at how certain genes affect the levels of important brain chemicals, finding some regions in our DNA that help control these levels.
Methodology
Quantitative linkage analysis using Haseman-Elston regression on 14 three-generation CEPH Utah pedigrees.
Limitations
The lack of a linkage signal for DBH expression levels could be due to insufficient polymorphism segregation or low expression variation.
Participant Demographics
14 three-generation CEPH Utah pedigrees, including 371 full sibling pairs.
Statistical Information
P-Value
6.5 × 10-3
Statistical Significance
p<0.05
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