Serum angiotensin converting enzyme activity in patients with chronic renal failure on long term hemodialysis

Area of Science:

• Biochemistry
• Nephrology
• Clinical Chemistry

Background:

• Chronic renal failure (CRF) affects multiple physiological systems.
• Hemodialysis is a common treatment for end-stage renal disease.
• The role of angiotensin converting enzyme (ACE) in CRF is not fully understood.

Purpose of the Study:

• To measure serum angiotensin converting enzyme (ACE) activity in patients with chronic renal failure on long-term hemodialysis.
• To compare ACE activity in these patients with healthy controls.
• To explore potential correlations between ACE activity and other physiological markers.

Main Methods:

• Spectrofluorometric assay used to determine serum ACE activity.
• Study included 19 patients with CRF on hemodialysis and 19 healthy controls.
• Plasma renin activity and blood pressure were also measured in patients.

Main Results:

• Serum ACE activity was significantly increased in 58% of CRF patients compared to controls (p < 0.005).
• No significant correlation was found between serum ACE activity and plasma renin activity.
• No significant correlation was observed between serum ACE activity and blood pressure in the studied patients.

Conclusions:

• Elevated serum ACE activity is a common finding in patients with chronic renal failure on long-term hemodialysis.
• The increase in ACE activity does not appear to correlate with plasma renin activity or blood pressure in this cohort.
• Further research is warranted to elucidate the mechanisms underlying increased ACE activity in CRF.