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CYP3A5 genotype is associated with elevated blood pressure
Martin F Fromm1, Bernhard M W Schmidt, Andreas Pahl
1Institute of Clinical and Experimental Pharmacology and Toxicology, University of Erlangen-Nuremberg, Erlangen, Germany.
Pharmacogenetics and Genomics
|September 6, 2005
Summary
The CYP3A5 genotype influences blood pressure in young Caucasian males. Specifically, the CYP3A5*3/*3 genotype is linked to higher systolic blood pressure and lower aldosterone levels.
Area of Science:
- Pharmacogenomics
- Cardiovascular Physiology
- Renal Physiology
Background:
- CYP3A5 is a key enzyme in the human kidney.
- Genetic variations in CYP3A5 may impact blood pressure regulation.
Purpose of the Study:
- To investigate the association between CYP3A5 gene polymorphism and blood pressure in Caucasians.
- To explore genotype-dependent differences in the renin-angiotensin-aldosterone system.
Main Methods:
- Recruited 115 young, white male students with untreated normal to mildly elevated blood pressure.
- Utilized 24-hour ambulatory blood pressure monitoring.
- Assessed genotype-dependent differences in renin-angiotensin-aldosterone system parameters.
Main Results:
- Individuals with the CYP3A5*3/*3 genotype exhibited significantly higher 24-hour systolic blood pressure compared to the CYP3A5*1/*3 genotype (129+/-10 vs. 124+/-9 mmHg, P < 0.05).
- The CYP3A5*3/*3 group showed significantly lower serum aldosterone concentrations (101+/-29 vs. 117+/-29 pg/ml, P < 0.05).
- No significant associations were found with diastolic blood pressure, angiotensin II levels, renal function, or echocardiographic parameters.
Conclusions:
- The CYP3A5 genotype appears to influence human blood pressure, potentially through altered renal metabolism of cortisol and/or aldosterone.
- Lower serum aldosterone in the CYP3A5*3/*3 genotype group may represent a counter-regulatory response to elevated systolic blood pressure.