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Plasma catecholamines in Nigerians with primary hypertension
Adewole A Adebiyi1, Olubayo M Akinosun, Chibuike E Nwafor
1Department of Medicine, College of Medicine, University of Ibadan, Ibadan, Nigeria. wadebiyi@comui.edu.ng
Ethnicity & Disease
|July 14, 2011
Summary
Black Nigerian hypertensives show higher plasma noradrenaline, suggesting a hyperadrenergic state. This may explain racial differences in hypertension severity, warranting further investigation into the adrenergic system.
Area of Science:
- Cardiology
- Endocrinology
- Pharmacology
Background:
- Hypertension is a leading global cardiovascular disease, significantly impacting morbidity and mortality.
- Increased adrenergic activity is implicated in hypertension development and progression.
- Hypertension severity often differs between racial groups, with Black patients experiencing more severe cases.
Purpose of the Study:
- To investigate the adrenergic system in Black Nigerian patients with hypertension.
- To measure plasma catecholamine levels in hypertensive Black Nigerians and compare them to controls.
Main Methods:
- Recruited 82 newly diagnosed hypertensives and 51 healthy controls.
- Collected fasting blood samples and 24-hour urine for analysis.
- Measured plasma levels of noradrenaline, adrenaline, renin, ACE, ANP, aldosterone, and insulin using HPLC.
Main Results:
- Hypertensives had higher plasma noradrenaline and lower plasma adrenaline levels.
- Lower levels of plasma renin, ACE, and ANP were observed in hypertensives.
- Systolic blood pressure positively correlated with noradrenaline and negatively with adrenaline.
Conclusions:
- Black Nigerian hypertensives exhibit elevated plasma noradrenaline, supporting a hyperadrenergic state.
- This hyperadrenergic state may contribute to racial disparities in hypertension severity.
- Further research is needed to elucidate the link between the hyperadrenergic state and racial differences in hypertension.
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