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Serum angiotensin converting enzyme activity in normal adults and patients with different types of hypertension

S Dux, N Aron, G Boner

    Israel Journal of Medical Sciences
    |December 1, 1984
    PubMed

    Insights

    Serum converting enzyme activity (SCEA) is unchanged in hypertension but elevated in chronic renal failure. Pregnancy shows subnormal SCEA, suggesting it doesn't significantly impact hypertension development.

    Area of Science:

    • Biochemistry
    • Nephrology
    • Cardiovascular Physiology

    Background:

    • Serum converting enzyme activity (SCEA) plays a role in the renin-angiotensin system.
    • Understanding SCEA variations in different physiological and pathological states is crucial for cardiovascular and renal research.

    Purpose of the Study:

    • To investigate serum converting enzyme activity (SCEA) levels in healthy individuals, patients with hypertension, and pregnant women.
    • To determine the relationship between SCEA and hypertension, renal failure, and pregnancy.

    Main Methods:

    • Serum converting enzyme activity (SCEA) was measured in various cohorts including healthy controls, essential hypertension patients, renal artery stenosis patients, chronic renal failure patients, and pregnant women.
    • Statistical analysis was performed to compare SCEA levels across groups and between sexes.

    Main Results:

    • No significant difference in SCEA was observed between normotensive and hypertensive individuals, or between men and women.
    • A significant increase in SCEA was found in patients with chronic renal failure (P < 0.005).
    • Subnormal SCEA levels were detected during pregnancy (P < 0.005).

    Conclusions:

    • Elevated SCEA in chronic renal failure may be linked to pulmonary vascular changes and cellular breakdown.
    • Reduced SCEA during pregnancy is hypothesized to result from kinin system activation.
    • Converting enzyme activity is unlikely to be a limiting factor in angiotensin conversion or a major contributor to hypertension pathogenesis.

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