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Plasma human brain natriuretic peptide in chronic renal failure
T Akiba1, K Tachibana, K Togashi
1Department of Internal Medicine, Tokyo Medical and Dental University, Japan.
Clinical Nephrology
|November 1, 1995
Summary
Simultaneous measurement of brain natriuretic peptide (BNP) and atrial natriuretic peptide (ANP) helps differentiate fluid and hemodynamic issues in dialysis patients. BNP levels increased significantly only in dialysis patients, unlike ANP.
Area of Science:
- Nephrology
- Cardiology
- Endocrinology
Background:
- Brain natriuretic peptide (BNP) and atrial natriuretic peptide (ANP) are homologous hormones with shared secretory regulation.
- Assessing both BNP and ANP simultaneously can provide insights into cardiac and fluid balance abnormalities.
- Chronic glomerulonephritis patients, even without apparent cardiac issues, were studied to understand natriuretic peptide regulation in renal dysfunction.
Purpose of the Study:
- To simultaneously assess plasma BNP and ANP levels in patients with varying degrees of chronic kidney disease (CKD).
- To investigate the relationship between BNP, ANP, serum creatinine, and dialysis status.
- To differentiate salt-water and hemodynamic abnormalities in dialysis patients using combined BNP and ANP measurements.
Main Methods:
- Plasma BNP and ANP levels were measured in three groups: normal renal function, chronic renal failure (CRF), and dialysis patients.
- Serum creatinine (Cr) levels were used to categorize patients based on renal function.
- Changes in BNP and ANP were analyzed before and after dialysis, correlating with body weight and Cr levels.
Main Results:
- BNP levels did not correlate with serum creatinine, suggesting the antibody specificity.
- Both BNP and ANP decreased after dialysis, with BNP changes correlating with body weight changes.
- Plasma BNP concentrations were significantly higher in dialysis patients (91.5 pg/ml) compared to those with normal renal function (12.0 pg/ml).
- Increased ANP in CRF and dialysis patients suggests atrial volume overload, while BNP elevation was specific to dialysis patients, indicating distinct hemodynamic stress.
Conclusions:
- Simultaneous measurement of plasma BNP and ANP effectively distinguishes salt-water and hemodynamic abnormalities in dialysis patients.
- BNP and ANP dynamics differ between chronic renal failure and dialysis, highlighting distinct pathophysiological processes.
- BNP may serve as a more specific indicator of hemodynamic stress in dialysis patients compared to ANP.