Correlation of Renin Angiotensin System (RAS) Candidate Gene Polymorphisms with Response to Ramipril in Patients with Essential Hypertension
Overview
Affiliations
Background: The renin-angiotensin system (RAS) is an important facet of blood pressure regulation physiology. Treatment of essential hypertension targets the RAS using Angiotensin Converting Enzyme Inhibitors (ACEIs). However, ACEIs are not uniformly effective and show inter-individual pharmacodynamic variations.
Aim: To assess the correlation between genetic polymorphisms in the genes coding for RAS components (angiotensin converting enzyme (ACE I/D), α-adducin (ADD1) and β1 -adrenoreceptor (β1-ADR)) and response to Ramipril.
Materials And Methods: We recruited 120 patients with essential hypertension who were administered Ramipril monotherapy initially, followed by combination therapy, if needed, based on their responses. Relationship between genotypes of the three candidate genes and decrease in the blood pressure (BP) was analyzed.
Results: One hundred and six patients were evaluable at the end of the study period and 21 different genotypes were observed among them. Seven of them were classified as responders after 8 weeks and at the end of 12 weeks, an additional 77 (72.64%) were deemed responders. 19/22 non-responders were treated with combination therapy and 7/19 (36.84%) showed a response to the same. There was a significant difference between the proportions of responders and non-responders among the genotypes of the ADD1 and β1-ADR genes (P=0.005 and 0.003, respectively). The best predictors of response to Ramipril 5 mg daily were the II/GG/SS, II/TG/SS, II/GG/SG, ID/GG/SS, ID/GG/SG and ID/TT/SS and DD/GG/SS; II/GG/GG, II/TT/SG, ID/TG/SG, ID/TT/SG, DD/GG/SG and DD/GG/GG were moderately predictive and II/TT/SS, II/TG/GG, ID/TG/GG, DD/TG/SG and DD/TG/GG were poorly predictive of response.
Discussion: Variable responses to Ramipril may be the result of genetic factors.
Conclusion: Pre-prescription genotyping may help individualize treatment.
Dewa A S Handani , Hermawan A, Ikawati Z Pharmacogenomics. 2024; 25(8-9):357-365.
PMID: 39069948 PMC: 11734884. DOI: 10.1080/14622416.2024.2375190.
Management of Hypertension in the Asia-Pacific Region: A Structured Review.
Rahman A, Magno J, Cai J, Han M, Lee H, Nair T Am J Cardiovasc Drugs. 2024; 24(2):141-170.
PMID: 38332411 PMC: 10973088. DOI: 10.1007/s40256-023-00625-1.
Tang S, Mai A, Chew N, Tam W, Tan D J Hum Hypertens. 2022; 37(3):170-180.
PMID: 36302845 DOI: 10.1038/s41371-022-00765-y.
Pathophysiology and potential future therapeutic targets using preclinical models of COVID-19.
Kumar R, Lee M, Mickael C, Kassa B, Pasha Q, Tuder R ERJ Open Res. 2020; 6(4).
PMID: 33313306 PMC: 7720688. DOI: 10.1183/23120541.00405-2020.
Gong X, Liu C, Wang H, Fan J, Jiang C, Zou Y Exp Ther Med. 2019; 18(3):1752-1760.
PMID: 31410134 PMC: 6676210. DOI: 10.3892/etm.2019.7769.