Related Experiment Videos
[Association between angiotensin system gene polymorphism and essential hypertension]
1Department of Cardiology, Gulou Hospital, School of Medicine of Nanjing University, Nanjing 210008 P.R. China.
Summary
The angiotensin converting enzyme (ACE) D allele and angiotensinogen (AGT) 235T polymorphism may contribute to early essential hypertension in Chinese individuals. Combined ACE and AGT genotypes (DD-TT, ID-TT) indicate a higher genetic risk for hypertension.
Area of Science:
- Genetics
- Cardiovascular Disease
- Molecular Biology
Background:
- Essential hypertension (HT) is a complex cardiovascular disease with a significant genetic component.
- Polymorphisms in genes like angiotensinogen (AGT), angiotensin II type I receptor (AT(1)R), and angiotensin converting enzyme (ACE) are investigated for their role in HT.
- Understanding these genetic factors is crucial for identifying individuals at risk and developing targeted interventions.
Purpose of the Study:
- To investigate the association between specific gene polymorphisms (AGT M235T, AT(1)R A1166C, ACE I/D) and essential hypertension in the Chinese population.
- To determine if combined genotypes of these genes confer a higher risk for developing hypertension.
- To explore the relationship between ACE genotype and serum ACE activity.
Main Methods:
- Genotyping of AGT M235T, AT(1)R A1166C, and ACE I/D polymorphisms using polymerase chain reaction (PCR) and restriction enzyme digestion.
- Analysis of genetic variations in 161 hypertensive patients and 134 normotensive controls.
- Statistical analysis to compare allele and genotype frequencies between groups and assess correlations.
Main Results:
- No significant differences in ACE D allele, AGT 235T, or AT(1)R A1166C frequencies were observed between hypertensive and normotensive groups overall.
- However, the ACE D allele and AGT 235T frequencies were significantly higher in hypertensive patients under 60 years old.
- Combined genotypes DD-TT and ID-TT of AGT and ACE genes were significantly more prevalent in hypertensive patients.
- A significant relationship was found between ACE genotype and serum ACE activity in both groups.
Conclusions:
- The ACE D allele and AGT 235T polymorphism may be implicated in the early onset of essential hypertension.
- Combined genotypes DD-TT and ID-TT of the AGT and ACE genes represent a potential genetic risk factor for hypertension in the Chinese population.
- These findings contribute to understanding the genetic underpinnings of hypertension and may aid in early risk assessment.