Arterial Blood Pressure Related to Degree of Albuminuria and Low-Molecular-Weight Proteinuria in IDDM

Urinary excretion of albumin and retinol-binding protein (a marker of tubular proteinuria that results from impaired proximal tubular reabsorption of lowmolecular- weight proteins) was determined in 110 insulin-dependent diabetic (IDDM) subjects. A statistically significant correlation between the urinary excretion of both proteins, in particular the retinolbinding protein, and the height of arterial blood pressure (systolic and diastolic) was observed. Correlation was weak, i.e., factors other than incipient nephropathy could be of greater importance for the development of arterial hypertension in diabetes.