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Conceptual basis and methodology of the SOPHIA study
N Glorioso1, G Argiolas, F Filigheddu
1University of Sassari, Hypertension and Cardiovascular Prevention Center - ASL n. 1, Viale S. Pietro, n. 8 07100-Sassari, Italy. glorioso@uniss.it
Pharmacogenomics
|November 24, 2007
Summary
This study investigates how gene variations affect blood pressure response to losartan and hydrochlorothiazide in 800 hypertensive patients. Pharmacogenomics will guide personalized hypertension treatment strategies.
Area of Science:
- Pharmacogenomics
- Cardiovascular Medicine
- Hypertension Research
Background:
- Essential hypertension affects a significant portion of the adult population, necessitating effective and personalized treatment strategies.
- The renin-angiotensin-aldosterone system (RAAS) plays a crucial role in blood pressure regulation, making its components targets for antihypertensive drugs like losartan.
- Genetic polymorphisms may influence individual responses to antihypertensive medications, impacting treatment efficacy and side effect profiles.
Purpose of the Study:
- To investigate the role of gene polymorphisms in the efficacy of losartan and losartan plus hydrochlorothiazide in managing blood pressure.
- To evaluate the impact of these genetic variations on cardiac, vascular, and metabolic phenotypes in hypertensive patients.
- To explore the relationship between genetic factors and the response to a stepped-care treatment regimen involving losartan, hydrochlorothiazide, and amlodipine.
Main Methods:
- The Study of the Pharmacogenomics in Italian hypertensive patients treated with the Angiotensin receptor blocker losartan (SOPHIA) is a prospective study involving 800 never-treated essential hypertensives.
- A stepped-care treatment approach will be employed, starting with losartan and escalating to include hydrochlorothiazide and amlodipine based on blood pressure readings.
- Comprehensive assessments including echocardiography, carotid intima-media thickness, 24-hour ambulatory blood pressure monitoring, and various biochemical markers will be performed. Genetic analysis will utilize Illumina custom arrays and a whole-genome scan.
Main Results:
- This section is to be filled once the study results are available.
- The study is designed to identify specific gene polymorphisms associated with differential responses to losartan and combination therapy.
- Expected outcomes include a better understanding of how genetic factors influence blood pressure control and cardiovascular/metabolic outcomes.
Conclusions:
- This study aims to elucidate the pharmacogenomic underpinnings of antihypertensive treatment response.
- Findings are expected to contribute to the development of personalized medicine approaches for hypertension management.
- Identifying genetic markers could optimize drug selection and dosage, improving patient outcomes and reducing cardiovascular risk.
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