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On the inheritance of abdominal aortic aneurysm
P P Majumder1, P L St Jean, R E Ferrell
1University of Pittsburgh.
American Journal of Human Genetics
|January 1, 1991
Summary
Abdominal aortic aneurysm (AAA) inheritance appears to be primarily genetic. Segregation analysis indicates a recessive gene on an autosomal locus is the most likely cause, not environmental factors.
Area of Science:
- Genetics
- Epidemiology
- Medical Science
Background:
- Abdominal aortic aneurysm (AAA) is a significant vascular disease with a known familial component.
- Understanding the mode of inheritance is crucial for risk assessment and genetic counseling.
Purpose of the Study:
- To investigate the genetic basis of abdominal aortic aneurysm (AAA).
- To determine the most likely mode of inheritance for AAA susceptibility.
Main Methods:
- Segregation analysis was performed on data from first-degree relatives of 91 AAA probands.
- Likelihood methods were used to compare various genetic and nongenetic inheritance models.
Main Results:
- The nongenetic model for AAA inheritance was statistically rejected.
- Significant evidence supported a genetic model for AAA susceptibility.
- The most parsimonious genetic model identified was autosomal recessive inheritance at a major locus.
Conclusions:
- Autosomal recessive inheritance is the most probable mode of transmission for abdominal aortic aneurysm (AAA).
- A single major gene locus likely plays a primary role in AAA susceptibility.
- Additional multifactorial components do not significantly improve the model's fit to the data.