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Genome screen for platelet monoamine oxidase (MAO) activity
N L Saccone1, J P Rice, N Rochberg
1Department of Psychiatry, Washington University, St. Louis, Missouri, USA. nlims@vodka.wustl.edu
American Journal of Medical Genetics
|September 22, 1999
Summary
Researchers identified potential genetic regions linked to platelet monoamine oxidase B (MAO-B) activity. Further studies are needed to confirm these findings for MAO-B gene linkage.
Area of Science:
- Genetics
- Neuroscience
- Biochemistry
Background:
- Platelet monoamine oxidase B (MAO-B) activity is influenced by genetic factors.
- Understanding the genetic control of MAO-B is crucial for various neurological and psychiatric conditions.
Purpose of the Study:
- To identify specific chromosomal loci associated with variations in platelet MAO-B activity.
- To perform a genomewide linkage screen for MAO-B activity control genes.
Main Methods:
- Utilized a genomewide linkage analysis in 148 nuclear families (1,008 sib-pairs) from the Collaborative Study on the Genetics of Alcoholism (COGA).
- Genotyped 291 markers and measured platelet MAO-B activity.
- Performed sib-pair analysis using Haseman-Elston regression with SIBPAL and MAPMAKER/SIBS programs.
Main Results:
- Two-point analysis revealed suggestive linkage with markers D6S1018, D2S1328, and D2S408 (p < 0.01).
- Multipoint analysis yielded maximal lod scores of 2.0 on chromosome 6 and 1.1-1.4 on chromosome 2.
- These results indicate potential linkage but require further confirmation.
Conclusions:
- The study identified suggestive chromosomal regions linked to platelet MAO-B activity.
- Further investigation with denser mapping and larger sample sizes is warranted to definitively establish gene linkage.