Abstract
The roles of blood pressure and glomerular filtration rate in the renal handling of albumin, beta 2-microglobulin and sodium were studied by partial correlation analysis in 22 patients with glomerulonephritis and in 25 patients with diabetic nephropathy. The analysis showed that in these proteinuric patients blood pressure may have an independent role in the regulation of albumin excretion in both diseases. Fractional beta 2-microglobulin clearance and fractional excretion of sodium correlated significantly in both diseases. In the diabetic patients this correlation remained strong after removing the effect of blood pressure, whereas in the patients with glomerulonephritis control of blood pressure clearly decreased the correlation. This reflects differences in the renal handling of sodium and beta 2-microglobulin in patients with diabetic nephropathy and glomerulonephritis.
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